From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf Date: Thu, 11 Mar 2021 02:32:30 -0800 Subject: [PATCH] Rewrite chunk system Rebased patches: New player chunk loader system Make ChunkStatus.EMPTY not rely on the main thread for completion In order to do this, we need to push the POI consistency checks to a later status. Since FULL is the only other status that uses the main thread, it can go there. The consistency checks are only really for when a desync occurs, and so that delaying the check only matters when the chunk data has desync'd. As long as the desync is sorted before the chunk is full loaded (i.e before setBlock can occur on a chunk), it should not matter. This change is primarily due to behavioural changes in the chunk task queue brought by region threading - which is to split the queue into separate regions. As such, it is required that in order for the sync load to complete that the region owning the chunk drain and execute the task while ticking. However, that is not always possible in region threading. Thus, removing the main thread reliance allows the chunk to progress without requiring a tick thread. Specifically, this allows far sync loads (outside of a specific regions bounds) to occur without issue - namely with structure searching. Increase parallelism for neighbour writing chunk statuses Namely, everything after FEATURES. By creating a dependency chain indicating what chunks are in use, we can safely schedule completely independent tasks in parallel. This will allow the chunk system to scale beyond 10 threads per world. Properly cancel chunk load tasks that were not scheduled Since the chunk load task was not scheduled, the entity/poi load task fields will not be set, but the task complete counter will not be adjusted. Thus, the chunk load task will not complete. To resolve this, detect when the entity/poi tasks were not scheduled and decrement the task complete counter in such cases. Mark POI/Entity load tasks as completed before releasing scheduling lock It must be marked as completed during that lock hold since the waiters field is set to null. Thus, any other thread attempting a cancellation will fail to remove from waiters. Also, any other thread attempting to cancel may set the completed field to true which would cause accept() to fail as well. Completion was always designed to happen while holding the scheduling lock to prevent these race conditions. The code was originally set up to complete while not holding the scheduling lock to avoid invoking callbacks while holding the lock, however the access to the completion field was not considered. Resolve this by marking the callback as completed during the lock, but invoking the accept() function after releasing the lock. This will prevent any cancellation attempts to be blocked, and allow the current thread to complete the callback without any issues. Cache whether region files do not exist The repeated I/O of creating the directory for the regionfile or for checking if the file exists can be heavy in when pushing chunk generation extremely hard - as each chunk gen request may effectively go through to the I/O thread. Use coordinate-based locking to increase chunk system parallelism A significant overhead in Folia comes from the chunk system's locks, the ticket lock and the scheduling lock. The public test server, which had ~330 players, had signficant performance problems with these locks: ~80% of the time spent ticking was _waiting_ for the locks to free. Given that it used around 15 cores total at peak, this is a complete and utter loss of potential. To address this issue, I have replaced the ticket lock and scheduling lock with two ReentrantAreaLocks. The ReentrantAreaLock takes a shift, which is used internally to group positions into sections. This grouping is neccessary, as the possible radius of area that needs to be acquired for any given lock usage is up to 64. As such, the shift is critical to reduce the number of areas required to lock for any lock operation. Currently, it is set to a shift of 6, which is identical to the ticket level propagation shift (and, it must be at least the ticket level propagation shift AND the region shift). The chunk system locking changes required a complete rewrite of the chunk system tick, chunk system unload, and chunk system ticket level propagation - as all of the previous logic only works with a single global lock. This does introduce two other section shifts: the lock shift, and the ticket shift. The lock shift is simply what shift the area locks use, and the ticket shift represents the size of the ticket sections. Currently, these values are just set to the region shift for simplicity. However, they are not arbitrary: the lock shift must be at least the size of the ticket shift and must be at least the size of the region shift. The ticket shift must also be >= the ceil(log2(max ticket level source)). The chunk system's ticket propagator is now global state, instead of region state. This cleans up the logic for ticket levels significantly, and removes usage of the region lock in this area, but it also means that the addition of a ticket no longer creates a region. To alleviate the side effects of this change, the global tick thread now processes ticket level updates for each world every tick to guarantee eventual ticket level processing. The chunk system also provides a hook to process ticket level changes in a given _section_, so that the region queue can guarantee that after adding its reference counter that the region section is created/exists/wont be destroyed. The ticket propagator operates by updating the sources in a single ticket section, and propagating the updates to its 1 radius neighbours. This allows the ticket updates to occur in parallel or selectively (see above). Currently, the process ticket level update function operates by polling from a concurrent queue of sections to update and simply invoking the single section update logic. This allows the function to operate completely in parallel, provided the queue is ordered right. Additionally, this limits the area used in the ticket/scheduling lock when processing updates, which should massively increase parallelism compared to before. The chunk system ticket addition for expirable ticket types has been modified to no longer track exact tick deadlines, as this relies on what region the ticket is in. Instead, the chunk system tracks a map of lock section -> (chunk coordinate -> expire ticket count) and every ticket has been changed to have a removeDelay count that is decremented each tick. Each region searches its own sections to find tickets to try to expire. Chunk system unloading has been modified to track unloads by lock section. The ordering is determined by which section a chunk resides in. The unload process now removes from unload sections and processes the full unload stages (1, 2, 3) before moving to the next section, if possible. This allows the unload logic to only hold one lock section at a time for each lock, which is a massive parallelism increase. In stress testing, these changes lowered the locking overhead to only 5% from ~70%, which completely fix the original problem as described. == AT == public net.minecraft.server.level.ChunkHolder pos public net.minecraft.server.level.ChunkMap overworldDataStorage public-f net.minecraft.world.level.chunk.storage.RegionFileStorage public net.minecraft.server.level.ChunkMap getPoiManager()Lnet/minecraft/world/entity/ai/village/poi/PoiManager; diff --git a/src/main/java/ca/spottedleaf/concurrentutil/lock/ReentrantAreaLock.java b/src/main/java/ca/spottedleaf/concurrentutil/lock/ReentrantAreaLock.java new file mode 100644 index 0000000000000000000000000000000000000000..4fd9a0cd8f1e6ae1a97e963dc7731a80bc6fac5b --- /dev/null +++ b/src/main/java/ca/spottedleaf/concurrentutil/lock/ReentrantAreaLock.java @@ -0,0 +1,395 @@ +package ca.spottedleaf.concurrentutil.lock; + +import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; +import it.unimi.dsi.fastutil.HashCommon; +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.locks.LockSupport; + +public final class ReentrantAreaLock { + + public final int coordinateShift; + + // aggressive load factor to reduce contention + private final ConcurrentHashMap nodes = new ConcurrentHashMap<>(128, 0.2f); + + public ReentrantAreaLock(final int coordinateShift) { + this.coordinateShift = coordinateShift; + } + + public boolean isHeldByCurrentThread(final int x, final int z) { + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int sectionX = x >> shift; + final int sectionZ = z >> shift; + + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + final Node node = this.nodes.get(coordinate); + + return node != null && node.thread == currThread; + } + + public boolean isHeldByCurrentThread(final int centerX, final int centerZ, final int radius) { + return this.isHeldByCurrentThread(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); + } + + public boolean isHeldByCurrentThread(final int fromX, final int fromZ, final int toX, final int toZ) { + if (fromX > toX || fromZ > toZ) { + throw new IllegalArgumentException(); + } + + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int fromSectionX = fromX >> shift; + final int fromSectionZ = fromZ >> shift; + final int toSectionX = toX >> shift; + final int toSectionZ = toZ >> shift; + + for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { + for (int currX = fromSectionX; currX <= toSectionX; ++currX) { + final Coordinate coordinate = new Coordinate(Coordinate.key(currX, currZ)); + + final Node node = this.nodes.get(coordinate); + + if (node == null || node.thread != currThread) { + return false; + } + } + } + + return true; + } + + public Node tryLock(final int x, final int z) { + return this.tryLock(x, z, x, z); + } + + public Node tryLock(final int centerX, final int centerZ, final int radius) { + return this.tryLock(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); + } + + public Node tryLock(final int fromX, final int fromZ, final int toX, final int toZ) { + if (fromX > toX || fromZ > toZ) { + throw new IllegalArgumentException(); + } + + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int fromSectionX = fromX >> shift; + final int fromSectionZ = fromZ >> shift; + final int toSectionX = toX >> shift; + final int toSectionZ = toZ >> shift; + + final List areaAffected = new ArrayList<>(); + + final Node ret = new Node(this, areaAffected, currThread); + + boolean failed = false; + + // try to fast acquire area + for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { + for (int currX = fromSectionX; currX <= toSectionX; ++currX) { + final Coordinate coordinate = new Coordinate(Coordinate.key(currX, currZ)); + + final Node prev = this.nodes.putIfAbsent(coordinate, ret); + + if (prev == null) { + areaAffected.add(coordinate); + continue; + } + + if (prev.thread != currThread) { + failed = true; + break; + } + } + } + + if (!failed) { + return ret; + } + + // failed, undo logic + if (!areaAffected.isEmpty()) { + for (int i = 0, len = areaAffected.size(); i < len; ++i) { + final Coordinate key = areaAffected.get(i); + + if (this.nodes.remove(key) != ret) { + throw new IllegalStateException(); + } + } + + areaAffected.clear(); + + // since we inserted, we need to drain waiters + Thread unpark; + while ((unpark = ret.pollOrBlockAdds()) != null) { + LockSupport.unpark(unpark); + } + } + + return null; + } + + public Node lock(final int x, final int z) { + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int sectionX = x >> shift; + final int sectionZ = z >> shift; + + final List areaAffected = new ArrayList<>(1); + + final Node ret = new Node(this, areaAffected, currThread); + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + + for (long failures = 0L;;) { + final Node park; + + // try to fast acquire area + { + final Node prev = this.nodes.putIfAbsent(coordinate, ret); + + if (prev == null) { + areaAffected.add(coordinate); + return ret; + } else if (prev.thread != currThread) { + park = prev; + } else { + // only one node we would want to acquire, and it's owned by this thread already + return ret; + } + } + + ++failures; + + if (failures > 128L && park.add(currThread)) { + LockSupport.park(); + } else { + // high contention, spin wait + if (failures < 128L) { + for (long i = 0; i < failures; ++i) { + Thread.onSpinWait(); + } + failures = failures << 1; + } else if (failures < 1_200L) { + LockSupport.parkNanos(1_000L); + failures = failures + 1L; + } else { // scale 0.1ms (100us) per failure + Thread.yield(); + LockSupport.parkNanos(100_000L * failures); + failures = failures + 1L; + } + } + } + } + + public Node lock(final int centerX, final int centerZ, final int radius) { + return this.lock(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); + } + + public Node lock(final int fromX, final int fromZ, final int toX, final int toZ) { + if (fromX > toX || fromZ > toZ) { + throw new IllegalArgumentException(); + } + + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int fromSectionX = fromX >> shift; + final int fromSectionZ = fromZ >> shift; + final int toSectionX = toX >> shift; + final int toSectionZ = toZ >> shift; + + if (((fromSectionX ^ toSectionX) | (fromSectionZ ^ toSectionZ)) == 0) { + return this.lock(fromX, fromZ); + } + + final List areaAffected = new ArrayList<>(); + + final Node ret = new Node(this, areaAffected, currThread); + + for (long failures = 0L;;) { + Node park = null; + boolean addedToArea = false; + boolean alreadyOwned = false; + boolean allOwned = true; + + // try to fast acquire area + for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { + for (int currX = fromSectionX; currX <= toSectionX; ++currX) { + final Coordinate coordinate = new Coordinate(Coordinate.key(currX, currZ)); + + final Node prev = this.nodes.putIfAbsent(coordinate, ret); + + if (prev == null) { + addedToArea = true; + allOwned = false; + areaAffected.add(coordinate); + continue; + } + + if (prev.thread != currThread) { + park = prev; + alreadyOwned = true; + break; + } + } + } + + if (park == null) { + if (alreadyOwned && !allOwned) { + throw new IllegalStateException("Improper lock usage: Should never acquire intersecting areas"); + } + return ret; + } + + // failed, undo logic + if (addedToArea) { + for (int i = 0, len = areaAffected.size(); i < len; ++i) { + final Coordinate key = areaAffected.get(i); + + if (this.nodes.remove(key) != ret) { + throw new IllegalStateException(); + } + } + + areaAffected.clear(); + + // since we inserted, we need to drain waiters + Thread unpark; + while ((unpark = ret.pollOrBlockAdds()) != null) { + LockSupport.unpark(unpark); + } + } + + ++failures; + + if (failures > 128L && park.add(currThread)) { + LockSupport.park(park); + } else { + // high contention, spin wait + if (failures < 128L) { + for (long i = 0; i < failures; ++i) { + Thread.onSpinWait(); + } + failures = failures << 1; + } else if (failures < 1_200L) { + LockSupport.parkNanos(1_000L); + failures = failures + 1L; + } else { // scale 0.1ms (100us) per failure + Thread.yield(); + LockSupport.parkNanos(100_000L * failures); + failures = failures + 1L; + } + } + + if (addedToArea) { + // try again, so we need to allow adds so that other threads can properly block on us + ret.allowAdds(); + } + } + } + + public void unlock(final Node node) { + if (node.lock != this) { + throw new IllegalStateException("Unlock target lock mismatch"); + } + + final List areaAffected = node.areaAffected; + + if (areaAffected.isEmpty()) { + // here we are not in the node map, and so do not need to remove from the node map or unblock any waiters + return; + } + + // remove from node map; allowing other threads to lock + for (int i = 0, len = areaAffected.size(); i < len; ++i) { + final Coordinate coordinate = areaAffected.get(i); + if (this.nodes.remove(coordinate) != node) { + throw new IllegalStateException(); + } + } + + Thread unpark; + while ((unpark = node.pollOrBlockAdds()) != null) { + LockSupport.unpark(unpark); + } + } + + public static final class Node extends MultiThreadedQueue { + + private final ReentrantAreaLock lock; + private final List areaAffected; + private final Thread thread; + //private final Throwable WHO_CREATED_MY_ASS = new Throwable(); + + private Node(final ReentrantAreaLock lock, final List areaAffected, final Thread thread) { + this.lock = lock; + this.areaAffected = areaAffected; + this.thread = thread; + } + + @Override + public String toString() { + return "Node{" + + "areaAffected=" + this.areaAffected + + ", thread=" + this.thread + + '}'; + } + } + + private static final class Coordinate implements Comparable { + + public final long key; + + public Coordinate(final long key) { + this.key = key; + } + + public Coordinate(final int x, final int z) { + this.key = key(x, z); + } + + public static long key(final int x, final int z) { + return ((long)z << 32) | (x & 0xFFFFFFFFL); + } + + public static int x(final long key) { + return (int)key; + } + + public static int z(final long key) { + return (int)(key >>> 32); + } + + @Override + public int hashCode() { + return (int)HashCommon.mix(this.key); + } + + @Override + public boolean equals(final Object obj) { + if (this == obj) { + return true; + } + + if (!(obj instanceof Coordinate other)) { + return false; + } + + return this.key == other.key; + } + + // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain + // is too large. So we should implement compareTo to help. + @Override + public int compareTo(final Coordinate other) { + return Long.compare(this.key, other.key); + } + + @Override + public String toString() { + return "[" + x(this.key) + "," + z(this.key) + "]"; + } + } +} diff --git a/src/main/java/ca/spottedleaf/concurrentutil/lock/SyncReentrantAreaLock.java b/src/main/java/ca/spottedleaf/concurrentutil/lock/SyncReentrantAreaLock.java new file mode 100644 index 0000000000000000000000000000000000000000..64b5803d002b2968841a5ddee987f98b72964e87 --- /dev/null +++ b/src/main/java/ca/spottedleaf/concurrentutil/lock/SyncReentrantAreaLock.java @@ -0,0 +1,217 @@ +package ca.spottedleaf.concurrentutil.lock; + +import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; +import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap; +import it.unimi.dsi.fastutil.longs.LongArrayList; +import java.util.concurrent.locks.LockSupport; + +// not concurrent, unlike ReentrantAreaLock +// no incorrect lock usage detection (acquiring intersecting areas) +// this class is nothing more than a performance reference for ReentrantAreaLock +public final class SyncReentrantAreaLock { + + private final int coordinateShift; + + // aggressive load factor to reduce contention + private final Long2ReferenceOpenHashMap nodes = new Long2ReferenceOpenHashMap<>(128, 0.2f); + + public SyncReentrantAreaLock(final int coordinateShift) { + this.coordinateShift = coordinateShift; + } + + private static long key(final int x, final int z) { + return ((long)z << 32) | (x & 0xFFFFFFFFL); + } + + public Node lock(final int x, final int z) { + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int sectionX = x >> shift; + final int sectionZ = z >> shift; + + final LongArrayList areaAffected = new LongArrayList(); + + final Node ret = new Node(this, areaAffected, currThread); + + final long coordinate = key(sectionX, sectionZ); + + for (long failures = 0L;;) { + final Node park; + + synchronized (this) { + // try to fast acquire area + final Node prev = this.nodes.putIfAbsent(coordinate, ret); + + if (prev == null) { + areaAffected.add(coordinate); + return ret; + } else if (prev.thread != currThread) { + park = prev; + } else { + // only one node we would want to acquire, and it's owned by this thread already + return ret; + } + } + + ++failures; + + if (failures > 128L && park.add(currThread)) { + LockSupport.park(); + } else { + // high contention, spin wait + if (failures < 128L) { + for (long i = 0; i < failures; ++i) { + Thread.onSpinWait(); + } + failures = failures << 1; + } else if (failures < 1_200L) { + LockSupport.parkNanos(1_000L); + failures = failures + 1L; + } else { // scale 0.1ms (100us) per failure + Thread.yield(); + LockSupport.parkNanos(100_000L * failures); + failures = failures + 1L; + } + } + } + } + + public Node lock(final int centerX, final int centerZ, final int radius) { + return this.lock(centerX - radius, centerZ - radius, centerX + radius, centerZ + radius); + } + + public Node lock(final int fromX, final int fromZ, final int toX, final int toZ) { + if (fromX > toX || fromZ > toZ) { + throw new IllegalArgumentException(); + } + + final Thread currThread = Thread.currentThread(); + final int shift = this.coordinateShift; + final int fromSectionX = fromX >> shift; + final int fromSectionZ = fromZ >> shift; + final int toSectionX = toX >> shift; + final int toSectionZ = toZ >> shift; + + final LongArrayList areaAffected = new LongArrayList(); + + final Node ret = new Node(this, areaAffected, currThread); + + for (long failures = 0L;;) { + Node park = null; + boolean addedToArea = false; + + synchronized (this) { + // try to fast acquire area + for (int currZ = fromSectionZ; currZ <= toSectionZ; ++currZ) { + for (int currX = fromSectionX; currX <= toSectionX; ++currX) { + final long coordinate = key(currX, currZ); + + final Node prev = this.nodes.putIfAbsent(coordinate, ret); + + if (prev == null) { + addedToArea = true; + areaAffected.add(coordinate); + continue; + } + + if (prev.thread != currThread) { + park = prev; + break; + } + } + } + + if (park == null) { + return ret; + } + + // failed, undo logic + if (!areaAffected.isEmpty()) { + for (int i = 0, len = areaAffected.size(); i < len; ++i) { + final long key = areaAffected.getLong(i); + + if (!this.nodes.remove(key, ret)) { + throw new IllegalStateException(); + } + } + } + } + + if (addedToArea) { + areaAffected.clear(); + // since we inserted, we need to drain waiters + Thread unpark; + while ((unpark = ret.pollOrBlockAdds()) != null) { + LockSupport.unpark(unpark); + } + } + + ++failures; + + if (failures > 128L && park.add(currThread)) { + LockSupport.park(); + } else { + // high contention, spin wait + if (failures < 128L) { + for (long i = 0; i < failures; ++i) { + Thread.onSpinWait(); + } + failures = failures << 1; + } else if (failures < 1_200L) { + LockSupport.parkNanos(1_000L); + failures = failures + 1L; + } else { // scale 0.1ms (100us) per failure + Thread.yield(); + LockSupport.parkNanos(100_000L * failures); + failures = failures + 1L; + } + } + + if (addedToArea) { + // try again, so we need to allow adds so that other threads can properly block on us + ret.allowAdds(); + } + } + } + + public void unlock(final Node node) { + if (node.lock != this) { + throw new IllegalStateException("Unlock target lock mismatch"); + } + + final LongArrayList areaAffected = node.areaAffected; + + if (areaAffected.isEmpty()) { + // here we are not in the node map, and so do not need to remove from the node map or unblock any waiters + return; + } + + // remove from node map; allowing other threads to lock + synchronized (this) { + for (int i = 0, len = areaAffected.size(); i < len; ++i) { + final long coordinate = areaAffected.getLong(i); + if (!this.nodes.remove(coordinate, node)) { + throw new IllegalStateException(); + } + } + } + + Thread unpark; + while ((unpark = node.pollOrBlockAdds()) != null) { + LockSupport.unpark(unpark); + } + } + + public static final class Node extends MultiThreadedQueue { + + private final SyncReentrantAreaLock lock; + private final LongArrayList areaAffected; + private final Thread thread; + + private Node(final SyncReentrantAreaLock lock, final LongArrayList areaAffected, final Thread thread) { + this.lock = lock; + this.areaAffected = areaAffected; + this.thread = thread; + } + } +} diff --git a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java index e0338db4d6fa359029ed5edeacc3646aa98701f5..c03dbb4a74d00d794be4139f0f7c4b5ff1b01d38 100644 --- a/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java +++ b/src/main/java/ca/spottedleaf/starlight/common/light/StarLightInterface.java @@ -41,14 +41,14 @@ public final class StarLightInterface { protected final ArrayDeque cachedSkyPropagators; protected final ArrayDeque cachedBlockPropagators; - protected final LightQueue lightQueue = new LightQueue(this); + public final io.papermc.paper.chunk.system.light.LightQueue lightQueue; // Paper - replace light queue protected final LayerLightEventListener skyReader; protected final LayerLightEventListener blockReader; protected final boolean isClientSide; - protected final int minSection; - protected final int maxSection; + public final int minSection; // Paper - public + public final int maxSection; // Paper - public protected final int minLightSection; protected final int maxLightSection; @@ -182,6 +182,7 @@ public final class StarLightInterface { StarLightInterface.this.sectionChange(pos, notReady); } }; + this.lightQueue = new io.papermc.paper.chunk.system.light.LightQueue(this); // Paper - replace light queue } public boolean hasSkyLight() { @@ -333,7 +334,7 @@ public final class StarLightInterface { return this.lightAccess; } - protected final SkyStarLightEngine getSkyLightEngine() { + public final SkyStarLightEngine getSkyLightEngine() { // Paper - public if (this.cachedSkyPropagators == null) { return null; } @@ -348,7 +349,7 @@ public final class StarLightInterface { return ret; } - protected final void releaseSkyLightEngine(final SkyStarLightEngine engine) { + public final void releaseSkyLightEngine(final SkyStarLightEngine engine) { // Paper - public if (this.cachedSkyPropagators == null) { return; } @@ -357,7 +358,7 @@ public final class StarLightInterface { } } - protected final BlockStarLightEngine getBlockLightEngine() { + public final BlockStarLightEngine getBlockLightEngine() { // Paper - public if (this.cachedBlockPropagators == null) { return null; } @@ -372,7 +373,7 @@ public final class StarLightInterface { return ret; } - protected final void releaseBlockLightEngine(final BlockStarLightEngine engine) { + public final void releaseBlockLightEngine(final BlockStarLightEngine engine) { // Paper - public if (this.cachedBlockPropagators == null) { return; } @@ -381,7 +382,7 @@ public final class StarLightInterface { } } - public LightQueue.ChunkTasks blockChange(final BlockPos pos) { + public io.papermc.paper.chunk.system.light.LightQueue.ChunkTasks blockChange(final BlockPos pos) { // Paper - rewrite chunk system if (this.world == null || pos.getY() < WorldUtil.getMinBlockY(this.world) || pos.getY() > WorldUtil.getMaxBlockY(this.world)) { // empty world return null; } @@ -389,7 +390,7 @@ public final class StarLightInterface { return this.lightQueue.queueBlockChange(pos); } - public LightQueue.ChunkTasks sectionChange(final SectionPos pos, final boolean newEmptyValue) { + public io.papermc.paper.chunk.system.light.LightQueue.ChunkTasks sectionChange(final SectionPos pos, final boolean newEmptyValue) { // Paper - rewrite chunk system if (this.world == null) { // empty world return null; } @@ -519,57 +520,15 @@ public final class StarLightInterface { } public void scheduleChunkLight(final ChunkPos pos, final Runnable run) { - this.lightQueue.queueChunkLighting(pos, run); + throw new UnsupportedOperationException("No longer implemented, use the new lightQueue field to queue tasks"); // Paper - replace light queue } public void removeChunkTasks(final ChunkPos pos) { - this.lightQueue.removeChunk(pos); + throw new UnsupportedOperationException("No longer implemented, use the new lightQueue field to queue tasks"); // Paper - replace light queue } public void propagateChanges() { - if (this.lightQueue.isEmpty()) { - return; - } - - final SkyStarLightEngine skyEngine = this.getSkyLightEngine(); - final BlockStarLightEngine blockEngine = this.getBlockLightEngine(); - - try { - LightQueue.ChunkTasks task; - while ((task = this.lightQueue.removeFirstTask()) != null) { - if (task.lightTasks != null) { - for (final Runnable run : task.lightTasks) { - run.run(); - } - } - - final long coordinate = task.chunkCoordinate; - final int chunkX = CoordinateUtils.getChunkX(coordinate); - final int chunkZ = CoordinateUtils.getChunkZ(coordinate); - - final Set positions = task.changedPositions; - final Boolean[] sectionChanges = task.changedSectionSet; - - if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) { - skyEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges); - } - if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) { - blockEngine.blocksChangedInChunk(this.lightAccess, chunkX, chunkZ, positions, sectionChanges); - } - - if (skyEngine != null && task.queuedEdgeChecksSky != null) { - skyEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksSky); - } - if (blockEngine != null && task.queuedEdgeChecksBlock != null) { - blockEngine.checkChunkEdges(this.lightAccess, chunkX, chunkZ, task.queuedEdgeChecksBlock); - } - - task.onComplete.complete(null); - } - } finally { - this.releaseSkyLightEngine(skyEngine); - this.releaseBlockLightEngine(blockEngine); - } + throw new UnsupportedOperationException("No longer implemented, task draining is now performed by the light thread"); // Paper - replace light queue } public static final class LightQueue { diff --git a/src/main/java/co/aikar/timings/WorldTimingsHandler.java b/src/main/java/co/aikar/timings/WorldTimingsHandler.java index 2f0d9b953802dee821cfde82d22b0567cce8ee91..22687667ec69a954261e55e59261286ac1b8b8cd 100644 --- a/src/main/java/co/aikar/timings/WorldTimingsHandler.java +++ b/src/main/java/co/aikar/timings/WorldTimingsHandler.java @@ -59,6 +59,16 @@ public class WorldTimingsHandler { public final Timing miscMobSpawning; + public final Timing poiUnload; + public final Timing chunkUnload; + public final Timing poiSaveDataSerialization; + public final Timing chunkSave; + public final Timing chunkSaveDataSerialization; + public final Timing chunkSaveIOWait; + public final Timing chunkUnloadPrepareSave; + public final Timing chunkUnloadPOISerialization; + public final Timing chunkUnloadDataSave; + public WorldTimingsHandler(Level server) { String name = ((PrimaryLevelData) server.getLevelData()).getLevelName() + " - "; @@ -112,6 +122,16 @@ public class WorldTimingsHandler { miscMobSpawning = Timings.ofSafe(name + "Mob spawning - Misc"); + + poiUnload = Timings.ofSafe(name + "Chunk unload - POI"); + chunkUnload = Timings.ofSafe(name + "Chunk unload - Chunk"); + poiSaveDataSerialization = Timings.ofSafe(name + "Chunk save - POI Data serialization"); + chunkSave = Timings.ofSafe(name + "Chunk save - Chunk"); + chunkSaveDataSerialization = Timings.ofSafe(name + "Chunk save - Chunk Data serialization"); + chunkSaveIOWait = Timings.ofSafe(name + "Chunk save - Chunk IO Wait"); + chunkUnloadPrepareSave = Timings.ofSafe(name + "Chunk unload - Async Save Prepare"); + chunkUnloadPOISerialization = Timings.ofSafe(name + "Chunk unload - POI Data Serialization"); + chunkUnloadDataSave = Timings.ofSafe(name + "Chunk unload - Data Serialization"); } public static Timing getTickList(ServerLevel worldserver, String timingsType) { diff --git a/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java b/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java index cff2f04409fab9abca87ceec85a551e1d59f9e7d..b1400f8bb661b13834c4176f94433435500113ba 100644 --- a/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java +++ b/src/main/java/io/papermc/paper/chunk/system/ChunkSystem.java @@ -32,192 +32,41 @@ public final class ChunkSystem { } public static void scheduleChunkTask(final ServerLevel level, final int chunkX, final int chunkZ, final Runnable run, final PrioritisedExecutor.Priority priority) { - level.chunkSource.mainThreadProcessor.execute(run); + level.chunkTaskScheduler.scheduleChunkTask(chunkX, chunkZ, run, priority); // Paper - rewrite chunk system } public static void scheduleChunkLoad(final ServerLevel level, final int chunkX, final int chunkZ, final boolean gen, final ChunkStatus toStatus, final boolean addTicket, final PrioritisedExecutor.Priority priority, final Consumer onComplete) { - if (gen) { - scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); - return; - } - scheduleChunkLoad(level, chunkX, chunkZ, ChunkStatus.EMPTY, addTicket, priority, (final ChunkAccess chunk) -> { - if (chunk == null) { - onComplete.accept(null); - } else { - if (chunk.getStatus().isOrAfter(toStatus)) { - scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); - } else { - onComplete.accept(null); - } - } - }); + level.chunkTaskScheduler.scheduleChunkLoad(chunkX, chunkZ, gen, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system } - static final TicketType CHUNK_LOAD = TicketType.create("chunk_load", Long::compareTo); - - private static long chunkLoadCounter = 0L; + // Paper - rewrite chunk system public static void scheduleChunkLoad(final ServerLevel level, final int chunkX, final int chunkZ, final ChunkStatus toStatus, final boolean addTicket, final PrioritisedExecutor.Priority priority, final Consumer onComplete) { - if (!Bukkit.isPrimaryThread()) { - scheduleChunkTask(level, chunkX, chunkZ, () -> { - scheduleChunkLoad(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); - }, priority); - return; - } - - final int minLevel = 33 + ChunkStatus.getDistance(toStatus); - final Long chunkReference = addTicket ? Long.valueOf(++chunkLoadCounter) : null; - final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ); - - if (addTicket) { - level.chunkSource.addTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); - } - level.chunkSource.runDistanceManagerUpdates(); - - final Consumer loadCallback = (final ChunkAccess chunk) -> { - try { - if (onComplete != null) { - onComplete.accept(chunk); - } - } catch (final ThreadDeath death) { - throw death; - } catch (final Throwable thr) { - LOGGER.error("Exception handling chunk load callback", thr); - SneakyThrow.sneaky(thr); - } finally { - if (addTicket) { - level.chunkSource.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, minLevel, chunkPos); - level.chunkSource.removeTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); - } - } - }; - - final ChunkHolder holder = level.chunkSource.chunkMap.updatingChunkMap.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); - - if (holder == null || holder.getTicketLevel() > minLevel) { - loadCallback.accept(null); - return; - } - - final CompletableFuture> loadFuture = holder.getOrScheduleFuture(toStatus, level.chunkSource.chunkMap); - - if (loadFuture.isDone()) { - loadCallback.accept(loadFuture.join().left().orElse(null)); - return; - } - - loadFuture.whenCompleteAsync((final Either either, final Throwable thr) -> { - if (thr != null) { - loadCallback.accept(null); - return; - } - loadCallback.accept(either.left().orElse(null)); - }, (final Runnable r) -> { - scheduleChunkTask(level, chunkX, chunkZ, r, PrioritisedExecutor.Priority.HIGHEST); - }); + level.chunkTaskScheduler.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system } public static void scheduleTickingState(final ServerLevel level, final int chunkX, final int chunkZ, final FullChunkStatus toStatus, final boolean addTicket, final PrioritisedExecutor.Priority priority, final Consumer onComplete) { - // This method goes unused until the chunk system rewrite - if (toStatus == FullChunkStatus.INACCESSIBLE) { - throw new IllegalArgumentException("Cannot wait for INACCESSIBLE status"); - } - - if (!Bukkit.isPrimaryThread()) { - scheduleChunkTask(level, chunkX, chunkZ, () -> { - scheduleTickingState(level, chunkX, chunkZ, toStatus, addTicket, priority, onComplete); - }, priority); - return; - } - - final int minLevel = 33 - (toStatus.ordinal() - 1); - final int radius = toStatus.ordinal() - 1; - final Long chunkReference = addTicket ? Long.valueOf(++chunkLoadCounter) : null; - final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ); - - if (addTicket) { - level.chunkSource.addTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); - } - level.chunkSource.runDistanceManagerUpdates(); - - final Consumer loadCallback = (final LevelChunk chunk) -> { - try { - if (onComplete != null) { - onComplete.accept(chunk); - } - } catch (final ThreadDeath death) { - throw death; - } catch (final Throwable thr) { - LOGGER.error("Exception handling chunk load callback", thr); - SneakyThrow.sneaky(thr); - } finally { - if (addTicket) { - level.chunkSource.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, minLevel, chunkPos); - level.chunkSource.removeTicketAtLevel(CHUNK_LOAD, chunkPos, minLevel, chunkReference); - } - } - }; - - final ChunkHolder holder = level.chunkSource.chunkMap.updatingChunkMap.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); - - if (holder == null || holder.getTicketLevel() > minLevel) { - loadCallback.accept(null); - return; - } - - final CompletableFuture> tickingState; - switch (toStatus) { - case FULL: { - tickingState = holder.getFullChunkFuture(); - break; - } - case BLOCK_TICKING: { - tickingState = holder.getTickingChunkFuture(); - break; - } - case ENTITY_TICKING: { - tickingState = holder.getEntityTickingChunkFuture(); - break; - } - default: { - throw new IllegalStateException("Cannot reach here"); - } - } - - if (tickingState.isDone()) { - loadCallback.accept(tickingState.join().left().orElse(null)); - return; - } - - tickingState.whenCompleteAsync((final Either either, final Throwable thr) -> { - if (thr != null) { - loadCallback.accept(null); - return; - } - loadCallback.accept(either.left().orElse(null)); - }, (final Runnable r) -> { - scheduleChunkTask(level, chunkX, chunkZ, r, PrioritisedExecutor.Priority.HIGHEST); - }); + level.chunkTaskScheduler.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); // Paper - rewrite chunk system } public static List getVisibleChunkHolders(final ServerLevel level) { - return new ArrayList<>(level.chunkSource.chunkMap.visibleChunkMap.values()); + return level.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders(); // Paper - rewrite chunk system } public static List getUpdatingChunkHolders(final ServerLevel level) { - return new ArrayList<>(level.chunkSource.chunkMap.updatingChunkMap.values()); + return level.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders(); // Paper - rewrite chunk system } public static int getVisibleChunkHolderCount(final ServerLevel level) { - return level.chunkSource.chunkMap.visibleChunkMap.size(); + return level.chunkTaskScheduler.chunkHolderManager.size(); // Paper - rewrite chunk system } public static int getUpdatingChunkHolderCount(final ServerLevel level) { - return level.chunkSource.chunkMap.updatingChunkMap.size(); + return level.chunkTaskScheduler.chunkHolderManager.size(); // Paper - rewrite chunk system } public static boolean hasAnyChunkHolders(final ServerLevel level) { @@ -244,26 +93,31 @@ public final class ChunkSystem { public static void onChunkBorder(final LevelChunk chunk, final ChunkHolder holder) { chunk.playerChunk = holder; + chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.FULL; } public static void onChunkNotBorder(final LevelChunk chunk, final ChunkHolder holder) { - + chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.INACCESSIBLE; } public static void onChunkTicking(final LevelChunk chunk, final ChunkHolder holder) { chunk.level.getChunkSource().tickingChunks.add(chunk); + chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.BLOCK_TICKING; } public static void onChunkNotTicking(final LevelChunk chunk, final ChunkHolder holder) { chunk.level.getChunkSource().tickingChunks.remove(chunk); + chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.FULL; } public static void onChunkEntityTicking(final LevelChunk chunk, final ChunkHolder holder) { chunk.level.getChunkSource().entityTickingChunks.add(chunk); + chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.ENTITY_TICKING; } public static void onChunkNotEntityTicking(final LevelChunk chunk, final ChunkHolder holder) { chunk.level.getChunkSource().entityTickingChunks.remove(chunk); + chunk.chunkStatus = net.minecraft.server.level.FullChunkStatus.BLOCK_TICKING; } public static ChunkHolder getUnloadingChunkHolder(final ServerLevel level, final int chunkX, final int chunkZ) { @@ -271,23 +125,15 @@ public final class ChunkSystem { } public static int getSendViewDistance(final ServerPlayer player) { - return getLoadViewDistance(player); + return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPISendViewDistance(player); } public static int getLoadViewDistance(final ServerPlayer player) { - final ServerLevel level = player.serverLevel(); - if (level == null) { - return Bukkit.getViewDistance(); - } - return level.chunkSource.chunkMap.getPlayerViewDistance(player); + return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getLoadViewDistance(player); } public static int getTickViewDistance(final ServerPlayer player) { - final ServerLevel level = player.serverLevel(); - if (level == null) { - return Bukkit.getSimulationDistance(); - } - return level.chunkSource.chunkMap.distanceManager.simulationDistance; + return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPITickViewDistance(player); } private ChunkSystem() { diff --git a/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java new file mode 100644 index 0000000000000000000000000000000000000000..ee58c67cb2bd78159cce19ec75f13dc6168a0e7a --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/RegionizedPlayerChunkLoader.java @@ -0,0 +1,1375 @@ +package io.papermc.paper.chunk.system; + +import ca.spottedleaf.concurrentutil.collection.SRSWLinkedQueue; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import io.papermc.paper.chunk.system.scheduling.ChunkHolderManager; +import io.papermc.paper.configuration.GlobalConfiguration; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import io.papermc.paper.util.player.SingleUserAreaMap; +import it.unimi.dsi.fastutil.longs.Long2ByteOpenHashMap; +import it.unimi.dsi.fastutil.longs.LongArrayList; +import it.unimi.dsi.fastutil.longs.LongComparator; +import it.unimi.dsi.fastutil.longs.LongHeapPriorityQueue; +import it.unimi.dsi.fastutil.longs.LongIterator; +import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet; +import it.unimi.dsi.fastutil.longs.LongOpenHashSet; +import net.minecraft.network.protocol.Packet; +import net.minecraft.network.protocol.game.ClientboundSetChunkCacheCenterPacket; +import net.minecraft.network.protocol.game.ClientboundSetChunkCacheRadiusPacket; +import net.minecraft.network.protocol.game.ClientboundSetSimulationDistancePacket; +import net.minecraft.server.level.ChunkTrackingView; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.ServerPlayer; +import net.minecraft.server.level.TicketType; +import net.minecraft.server.network.PlayerChunkSender; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.GameRules; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.levelgen.BelowZeroRetrogen; +import org.bukkit.craftbukkit.entity.CraftPlayer; +import org.bukkit.entity.Player; +import java.lang.invoke.VarHandle; +import java.util.ArrayDeque; +import java.util.Arrays; +import java.util.Objects; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicLong; + +public class RegionizedPlayerChunkLoader { + + // expected that this list returns for a given radius, the set of chunks ordered + // by manhattan distance + private static final long[][] SEARCH_RADIUS_ITERATION_LIST = new long[64+2+1][]; + static { + for (int i = 0; i < SEARCH_RADIUS_ITERATION_LIST.length; ++i) { + // a BFS around -x, -z, +x, +z will give increasing manhatten distance + SEARCH_RADIUS_ITERATION_LIST[i] = generateBFSOrder(i); + } + } + + private static void expandQuadrants(final CustomLongArray input, final int size) { + final int len = input.size(); + final long[] array = input.elements(); + + int writeIndex = size - 1; + for (int i = len - 1; i >= 0; --i) { + final long key = array[i]; + final int chunkX = CoordinateUtils.getChunkX(key); + final int chunkZ = CoordinateUtils.getChunkZ(key); + + if ((chunkX | chunkZ) < 0 || (i != 0 && chunkX == 0 && chunkZ == 0)) { + throw new IllegalStateException(); + } + + // Q4 + if (chunkZ != 0) { + array[writeIndex--] = CoordinateUtils.getChunkKey(chunkX, -chunkZ); + } + // Q3 + if (chunkX != 0 && chunkZ != 0) { + array[writeIndex--] = CoordinateUtils.getChunkKey(-chunkX, -chunkZ); + } + // Q2 + if (chunkX != 0) { + array[writeIndex--] = CoordinateUtils.getChunkKey(-chunkX, chunkZ); + } + + array[writeIndex--] = key; + } + + input.forceSize(size); + + if (writeIndex != -1) { + throw new IllegalStateException(); + } + } + + private static long[] generateBFSOrder(final int radius) { + // by using only the first quadrant, we can reduce the total element size by 4 when spreading + final CustomLongArray[] byDistance = makeQ1BFS(radius); + + // to increase generation parallelism, we want to space the chunks out so that they are not nearby when generating + // this also means we are minimising locality + // but, we need to maintain sorted order by manhatten distance + + // per manhatten distance we transform the chunk list so that each element is maximally spaced out from each other + for (int i = 0, len = byDistance.length; i < len; ++i) { + final CustomLongArray points = byDistance[i]; + final int expectedSize = getDistanceSize(i, radius); + + final CustomLongArray spread = spread(points, expectedSize); + // add in Q2, Q3, Q4 + expandQuadrants(spread, expectedSize); + + byDistance[i] = spread; + } + + // now, rebuild the list so that it still maintains manhatten distance order + final CustomLongArray ret = new CustomLongArray((2 * radius + 1) * (2 * radius + 1)); + + for (final CustomLongArray dist : byDistance) { + ret.addAll(dist); + } + + return ret.elements(); + } + + public static final TicketType REGION_PLAYER_TICKET = TicketType.create("region_player_ticket", Long::compareTo); + + public static final int MIN_VIEW_DISTANCE = 2; + public static final int MAX_VIEW_DISTANCE = 32; + + public static final int TICK_TICKET_LEVEL = 31; + public static final int GENERATED_TICKET_LEVEL = 33 + ChunkStatus.getDistance(ChunkStatus.FULL); + public static final int LOADED_TICKET_LEVEL = 33 + ChunkStatus.getDistance(ChunkStatus.EMPTY); + + public static final record ViewDistances( + int tickViewDistance, + int loadViewDistance, + int sendViewDistance + ) { + public ViewDistances setTickViewDistance(final int distance) { + return new ViewDistances(distance, this.loadViewDistance, this.sendViewDistance); + } + + public ViewDistances setLoadViewDistance(final int distance) { + return new ViewDistances(this.tickViewDistance, distance, this.sendViewDistance); + } + + + public ViewDistances setSendViewDistance(final int distance) { + return new ViewDistances(this.tickViewDistance, this.loadViewDistance, distance); + } + } + + public static int getAPITickViewDistance(final Player player) { + return getAPITickViewDistance(((CraftPlayer)player).getHandle()); + } + + public static int getAPITickViewDistance(final ServerPlayer player) { + final ServerLevel level = (ServerLevel)player.level(); + final PlayerChunkLoaderData data = player.chunkLoader; + if (data == null) { + return level.playerChunkLoader.getAPITickDistance(); + } + return data.lastTickDistance; + } + + public static int getAPIViewDistance(final Player player) { + return getAPIViewDistance(((CraftPlayer)player).getHandle()); + } + + public static int getAPIViewDistance(final ServerPlayer player) { + final ServerLevel level = (ServerLevel)player.level(); + final PlayerChunkLoaderData data = player.chunkLoader; + if (data == null) { + return level.playerChunkLoader.getAPIViewDistance(); + } + // view distance = load distance + 1 + return data.lastLoadDistance - 1; + } + + public static int getLoadViewDistance(final ServerPlayer player) { + final ServerLevel level = (ServerLevel)player.level(); + final PlayerChunkLoaderData data = player.chunkLoader; + if (data == null) { + return level.playerChunkLoader.getAPIViewDistance(); + } + // view distance = load distance + 1 + return data.lastLoadDistance - 1; + } + + public static int getAPISendViewDistance(final Player player) { + return getAPISendViewDistance(((CraftPlayer)player).getHandle()); + } + + public static int getAPISendViewDistance(final ServerPlayer player) { + final ServerLevel level = (ServerLevel)player.level(); + final PlayerChunkLoaderData data = player.chunkLoader; + if (data == null) { + return level.playerChunkLoader.getAPISendViewDistance(); + } + return data.lastSendDistance; + } + + private final ServerLevel world; + + public RegionizedPlayerChunkLoader(final ServerLevel world) { + this.world = world; + } + + public void addPlayer(final ServerPlayer player) { + TickThread.ensureTickThread(player, "Cannot add player to player chunk loader async"); + if (!player.isRealPlayer) { + return; + } + + if (player.chunkLoader != null) { + throw new IllegalStateException("Player is already added to player chunk loader"); + } + + final PlayerChunkLoaderData loader = new PlayerChunkLoaderData(this.world, player); + + player.chunkLoader = loader; + loader.add(); + } + + public void updatePlayer(final ServerPlayer player) { + final PlayerChunkLoaderData loader = player.chunkLoader; + if (loader != null) { + loader.update(); + } + } + + public void removePlayer(final ServerPlayer player) { + TickThread.ensureTickThread(player, "Cannot remove player from player chunk loader async"); + if (!player.isRealPlayer) { + return; + } + + final PlayerChunkLoaderData loader = player.chunkLoader; + + if (loader == null) { + return; + } + + loader.remove(); + player.chunkLoader = null; + } + + public void setSendDistance(final int distance) { + this.world.setSendViewDistance(distance); + } + + public void setLoadDistance(final int distance) { + this.world.setLoadViewDistance(distance); + } + + public void setTickDistance(final int distance) { + this.world.setTickViewDistance(distance); + } + + // Note: follow the player chunk loader so everything stays consistent... + public int getAPITickDistance() { + final ViewDistances distances = this.world.getViewDistances(); + final int tickViewDistance = PlayerChunkLoaderData.getTickDistance(-1, distances.tickViewDistance); + return tickViewDistance; + } + + public int getAPIViewDistance() { + final ViewDistances distances = this.world.getViewDistances(); + final int tickViewDistance = PlayerChunkLoaderData.getTickDistance(-1, distances.tickViewDistance); + final int loadDistance = PlayerChunkLoaderData.getLoadViewDistance(tickViewDistance, -1, distances.loadViewDistance); + + // loadDistance = api view distance + 1 + return loadDistance - 1; + } + + public int getAPISendViewDistance() { + final ViewDistances distances = this.world.getViewDistances(); + final int tickViewDistance = PlayerChunkLoaderData.getTickDistance(-1, distances.tickViewDistance); + final int loadDistance = PlayerChunkLoaderData.getLoadViewDistance(tickViewDistance, -1, distances.loadViewDistance); + final int sendViewDistance = PlayerChunkLoaderData.getSendViewDistance( + loadDistance, -1, -1, distances.sendViewDistance + ); + + return sendViewDistance; + } + + public boolean isChunkSent(final ServerPlayer player, final int chunkX, final int chunkZ, final boolean borderOnly) { + return borderOnly ? this.isChunkSentBorderOnly(player, chunkX, chunkZ) : this.isChunkSent(player, chunkX, chunkZ); + } + + public boolean isChunkSent(final ServerPlayer player, final int chunkX, final int chunkZ) { + final PlayerChunkLoaderData loader = player.chunkLoader; + if (loader == null) { + return false; + } + + return loader.sentChunks.contains(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + + public boolean isChunkSentBorderOnly(final ServerPlayer player, final int chunkX, final int chunkZ) { + final PlayerChunkLoaderData loader = player.chunkLoader; + if (loader == null) { + return false; + } + + for (int dz = -1; dz <= 1; ++dz) { + for (int dx = -1; dx <= 1; ++dx) { + if (!loader.sentChunks.contains(CoordinateUtils.getChunkKey(dx + chunkX, dz + chunkZ))) { + return true; + } + } + } + + return false; + } + + public void tick() { + TickThread.ensureTickThread("Cannot tick player chunk loader async"); + long currTime = System.nanoTime(); + for (final ServerPlayer player : new java.util.ArrayList<>(this.world.players())) { + final PlayerChunkLoaderData loader = player.chunkLoader; + if (loader == null || loader.world != this.world) { + // not our problem anymore + continue; + } + loader.update(); // can't invoke plugin logic + loader.updateQueues(currTime); + } + } + + public static final class PlayerChunkLoaderData { + + private static final AtomicLong ID_GENERATOR = new AtomicLong(); + private final long id = ID_GENERATOR.incrementAndGet(); + private final Long idBoxed = Long.valueOf(this.id); + + private static final long MAX_RATE = 10_000L; + + private final ServerPlayer player; + private final ServerLevel world; + + private int lastChunkX = Integer.MIN_VALUE; + private int lastChunkZ = Integer.MIN_VALUE; + + private int lastSendDistance = Integer.MIN_VALUE; + private int lastLoadDistance = Integer.MIN_VALUE; + private int lastTickDistance = Integer.MIN_VALUE; + + private int lastSentChunkCenterX = Integer.MIN_VALUE; + private int lastSentChunkCenterZ = Integer.MIN_VALUE; + + private int lastSentChunkRadius = Integer.MIN_VALUE; + private int lastSentSimulationDistance = Integer.MIN_VALUE; + + private boolean canGenerateChunks = true; + + private final ArrayDeque> delayedTicketOps = new ArrayDeque<>(); + private final LongOpenHashSet sentChunks = new LongOpenHashSet(); + + private static final byte CHUNK_TICKET_STAGE_NONE = 0; + private static final byte CHUNK_TICKET_STAGE_LOADING = 1; + private static final byte CHUNK_TICKET_STAGE_LOADED = 2; + private static final byte CHUNK_TICKET_STAGE_GENERATING = 3; + private static final byte CHUNK_TICKET_STAGE_GENERATED = 4; + private static final byte CHUNK_TICKET_STAGE_TICK = 5; + private static final int[] TICKET_STAGE_TO_LEVEL = new int[] { + ChunkHolderManager.MAX_TICKET_LEVEL + 1, + LOADED_TICKET_LEVEL, + LOADED_TICKET_LEVEL, + GENERATED_TICKET_LEVEL, + GENERATED_TICKET_LEVEL, + TICK_TICKET_LEVEL + }; + private final Long2ByteOpenHashMap chunkTicketStage = new Long2ByteOpenHashMap(); + { + this.chunkTicketStage.defaultReturnValue(CHUNK_TICKET_STAGE_NONE); + } + + // rate limiting + private final AllocatingRateLimiter chunkSendLimiter = new AllocatingRateLimiter(); + private final AllocatingRateLimiter chunkLoadTicketLimiter = new AllocatingRateLimiter(); + private final AllocatingRateLimiter chunkGenerateTicketLimiter = new AllocatingRateLimiter(); + + // queues + private final LongComparator CLOSEST_MANHATTAN_DIST = (final long c1, final long c2) -> { + final int c1x = CoordinateUtils.getChunkX(c1); + final int c1z = CoordinateUtils.getChunkZ(c1); + + final int c2x = CoordinateUtils.getChunkX(c2); + final int c2z = CoordinateUtils.getChunkZ(c2); + + final int centerX = PlayerChunkLoaderData.this.lastChunkX; + final int centerZ = PlayerChunkLoaderData.this.lastChunkZ; + + return Integer.compare( + Math.abs(c1x - centerX) + Math.abs(c1z - centerZ), + Math.abs(c2x - centerX) + Math.abs(c2z - centerZ) + ); + }; + private final LongHeapPriorityQueue sendQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); + private final LongHeapPriorityQueue tickingQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); + private final LongHeapPriorityQueue generatingQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); + private final LongHeapPriorityQueue genQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); + private final LongHeapPriorityQueue loadingQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); + private final LongHeapPriorityQueue loadQueue = new LongHeapPriorityQueue(CLOSEST_MANHATTAN_DIST); + + private volatile boolean removed; + + public PlayerChunkLoaderData(final ServerLevel world, final ServerPlayer player) { + this.world = world; + this.player = player; + } + + private void flushDelayedTicketOps() { + if (this.delayedTicketOps.isEmpty()) { + return; + } + this.world.chunkTaskScheduler.chunkHolderManager.performTicketUpdates(this.delayedTicketOps); + this.delayedTicketOps.clear(); + } + + private void pushDelayedTicketOp(final ChunkHolderManager.TicketOperation op) { + this.delayedTicketOps.addLast(op); + } + + private void sendChunk(final int chunkX, final int chunkZ) { + if (this.sentChunks.add(CoordinateUtils.getChunkKey(chunkX, chunkZ))) { + PlayerChunkSender.sendChunk(this.player.connection, this.world, this.world.getChunkIfLoaded(chunkX, chunkZ)); + return; + } + throw new IllegalStateException(); + } + + private void sendUnloadChunk(final int chunkX, final int chunkZ) { + if (!this.sentChunks.remove(CoordinateUtils.getChunkKey(chunkX, chunkZ))) { + return; + } + this.sendUnloadChunkRaw(chunkX, chunkZ); + } + + private void sendUnloadChunkRaw(final int chunkX, final int chunkZ) { + PlayerChunkSender.dropChunkStatic(this.player, new ChunkPos(chunkX, chunkZ)); + } + + private final SingleUserAreaMap broadcastMap = new SingleUserAreaMap<>(this) { + @Override + protected void addCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { + // do nothing, we only care about remove + } + + @Override + protected void removeCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { + parameter.sendUnloadChunk(chunkX, chunkZ); + } + }; + private final SingleUserAreaMap loadTicketCleanup = new SingleUserAreaMap<>(this) { + @Override + protected void addCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { + // do nothing, we only care about remove + } + + @Override + protected void removeCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { + final long chunk = CoordinateUtils.getChunkKey(chunkX, chunkZ); + final byte ticketStage = parameter.chunkTicketStage.remove(chunk); + final int level = TICKET_STAGE_TO_LEVEL[ticketStage]; + if (level > ChunkHolderManager.MAX_TICKET_LEVEL) { + return; + } + + parameter.pushDelayedTicketOp(ChunkHolderManager.TicketOperation.addAndRemove( + chunk, + TicketType.UNKNOWN, level, new ChunkPos(chunkX, chunkZ), + REGION_PLAYER_TICKET, level, parameter.idBoxed + )); + } + }; + private final SingleUserAreaMap tickMap = new SingleUserAreaMap<>(this) { + @Override + protected void addCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { + // do nothing, we will detect ticking chunks when we try to load them + } + + @Override + protected void removeCallback(final PlayerChunkLoaderData parameter, final int chunkX, final int chunkZ) { + final long chunk = CoordinateUtils.getChunkKey(chunkX, chunkZ); + // note: by the time this is called, the tick cleanup should have ran - so, if the chunk is at + // the tick stage it was deemed in range for loading. Thus, we need to move it to generated + if (!parameter.chunkTicketStage.replace(chunk, CHUNK_TICKET_STAGE_TICK, CHUNK_TICKET_STAGE_GENERATED)) { + return; + } + + // Since we are possibly downgrading the ticket level, we add an unknown ticket so that + // the level is kept until tick(). + parameter.pushDelayedTicketOp(ChunkHolderManager.TicketOperation.addAndRemove( + chunk, + TicketType.UNKNOWN, TICK_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ), + REGION_PLAYER_TICKET, TICK_TICKET_LEVEL, parameter.idBoxed + )); + // keep chunk at new generated level + parameter.pushDelayedTicketOp(ChunkHolderManager.TicketOperation.addOp( + chunk, + REGION_PLAYER_TICKET, GENERATED_TICKET_LEVEL, parameter.idBoxed + )); + } + }; + + private static boolean wantChunkLoaded(final int centerX, final int centerZ, final int chunkX, final int chunkZ, + final int sendRadius) { + // expect sendRadius to be = 1 + target viewable radius + return ChunkTrackingView.isWithinDistance(centerX, centerZ, sendRadius, chunkX, chunkZ, true); + } + + private static int getClientViewDistance(final ServerPlayer player) { + final Integer vd = player.requestedViewDistance(); + return vd == null ? -1 : Math.max(0, vd.intValue()); + } + + private static int getTickDistance(final int playerTickViewDistance, final int worldTickViewDistance) { + return playerTickViewDistance < 0 ? worldTickViewDistance : playerTickViewDistance; + } + + private static int getLoadViewDistance(final int tickViewDistance, final int playerLoadViewDistance, + final int worldLoadViewDistance) { + return Math.max(tickViewDistance + 1, playerLoadViewDistance < 0 ? worldLoadViewDistance : playerLoadViewDistance); + } + + private static int getSendViewDistance(final int loadViewDistance, final int clientViewDistance, + final int playerSendViewDistance, final int worldSendViewDistance) { + return Math.min( + loadViewDistance - 1, + playerSendViewDistance < 0 ? (!GlobalConfiguration.get().chunkLoadingAdvanced.autoConfigSendDistance || clientViewDistance < 0 ? (worldSendViewDistance < 0 ? (loadViewDistance - 1) : worldSendViewDistance) : clientViewDistance + 1) : playerSendViewDistance + ); + } + + private Packet updateClientChunkRadius(final int radius) { + this.lastSentChunkRadius = radius; + return new ClientboundSetChunkCacheRadiusPacket(radius); + } + + private Packet updateClientSimulationDistance(final int distance) { + this.lastSentSimulationDistance = distance; + return new ClientboundSetSimulationDistancePacket(distance); + } + + private Packet updateClientChunkCenter(final int chunkX, final int chunkZ) { + this.lastSentChunkCenterX = chunkX; + this.lastSentChunkCenterZ = chunkZ; + return new ClientboundSetChunkCacheCenterPacket(chunkX, chunkZ); + } + + private boolean canPlayerGenerateChunks() { + return !this.player.isSpectator() || this.world.getGameRules().getBoolean(GameRules.RULE_SPECTATORSGENERATECHUNKS); + } + + private double getMaxChunkLoadRate() { + final double configRate = GlobalConfiguration.get().chunkLoadingBasic.playerMaxChunkLoadRate; + + return configRate < 0.0 || configRate > (double)MAX_RATE ? (double)MAX_RATE : Math.max(1.0, configRate); + } + + private double getMaxChunkGenRate() { + final double configRate = GlobalConfiguration.get().chunkLoadingBasic.playerMaxChunkGenerateRate; + + return configRate < 0.0 || configRate > (double)MAX_RATE ? (double)MAX_RATE : Math.max(1.0, configRate); + } + + private double getMaxChunkSendRate() { + final double configRate = GlobalConfiguration.get().chunkLoadingBasic.playerMaxChunkSendRate; + + return configRate < 0.0 || configRate > (double)MAX_RATE ? (double)MAX_RATE : Math.max(1.0, configRate); + } + + private long getMaxChunkLoads() { + final long radiusChunks = (2L * this.lastLoadDistance + 1L) * (2L * this.lastLoadDistance + 1L); + long configLimit = GlobalConfiguration.get().chunkLoadingAdvanced.playerMaxConcurrentChunkLoads; + if (configLimit == 0L) { + // by default, only allow 1/5th of the chunks in the view distance to be concurrently active + configLimit = Math.max(5L, radiusChunks / 5L); + } else if (configLimit < 0L) { + configLimit = Integer.MAX_VALUE; + } // else: use the value configured + configLimit = configLimit - this.loadingQueue.size(); + + return configLimit; + } + + private long getMaxChunkGenerates() { + final long radiusChunks = (2L * this.lastLoadDistance + 1L) * (2L * this.lastLoadDistance + 1L); + long configLimit = GlobalConfiguration.get().chunkLoadingAdvanced.playerMaxConcurrentChunkGenerates; + if (configLimit == 0L) { + // by default, only allow 1/5th of the chunks in the view distance to be concurrently active + configLimit = Math.max(5L, radiusChunks / 5L); + } else if (configLimit < 0L) { + configLimit = Integer.MAX_VALUE; + } // else: use the value configured + configLimit = configLimit - this.generatingQueue.size(); + + return configLimit; + } + + private boolean wantChunkSent(final int chunkX, final int chunkZ) { + final int dx = this.lastChunkX - chunkX; + final int dz = this.lastChunkZ - chunkZ; + return (Math.max(Math.abs(dx), Math.abs(dz)) <= (this.lastSendDistance + 1)) && wantChunkLoaded( + this.lastChunkX, this.lastChunkZ, chunkX, chunkZ, this.lastSendDistance + ); + } + + private boolean wantChunkTicked(final int chunkX, final int chunkZ) { + final int dx = this.lastChunkX - chunkX; + final int dz = this.lastChunkZ - chunkZ; + return Math.max(Math.abs(dx), Math.abs(dz)) <= this.lastTickDistance; + } + + void updateQueues(final long time) { + TickThread.ensureTickThread(this.player, "Cannot tick player chunk loader async"); + if (this.removed) { + throw new IllegalStateException("Ticking removed player chunk loader"); + } + // update rate limits + final double loadRate = this.getMaxChunkLoadRate(); + final double genRate = this.getMaxChunkGenRate(); + final double sendRate = this.getMaxChunkSendRate(); + + this.chunkLoadTicketLimiter.tickAllocation(time, loadRate, loadRate); + this.chunkGenerateTicketLimiter.tickAllocation(time, genRate, genRate); + this.chunkSendLimiter.tickAllocation(time, sendRate, sendRate); + + // try to progress chunk loads + while (!this.loadingQueue.isEmpty()) { + final long pendingLoadChunk = this.loadingQueue.firstLong(); + final int pendingChunkX = CoordinateUtils.getChunkX(pendingLoadChunk); + final int pendingChunkZ = CoordinateUtils.getChunkZ(pendingLoadChunk); + final ChunkAccess pending = this.world.chunkSource.getChunkAtImmediately(pendingChunkX, pendingChunkZ); + if (pending == null) { + // nothing to do here + break; + } + // chunk has loaded, so we can take it out of the queue + this.loadingQueue.dequeueLong(); + + // try to move to generate queue + final byte prev = this.chunkTicketStage.put(pendingLoadChunk, CHUNK_TICKET_STAGE_LOADED); + if (prev != CHUNK_TICKET_STAGE_LOADING) { + throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_LOADING + ", not " + prev); + } + + if (this.canGenerateChunks || this.isLoadedChunkGeneratable(pending)) { + this.genQueue.enqueue(pendingLoadChunk); + } // else: don't want to generate, so just leave it loaded + } + + // try to push more chunk loads + final long maxLoads = Math.max(0L, Math.min(MAX_RATE, Math.min(this.loadQueue.size(), this.getMaxChunkLoads()))); + final int maxLoadsThisTick = (int)this.chunkLoadTicketLimiter.takeAllocation(time, loadRate, maxLoads); + if (maxLoadsThisTick > 0) { + final LongArrayList chunks = new LongArrayList(maxLoadsThisTick); + for (int i = 0; i < maxLoadsThisTick; ++i) { + final long chunk = this.loadQueue.dequeueLong(); + final byte prev = this.chunkTicketStage.put(chunk, CHUNK_TICKET_STAGE_LOADING); + if (prev != CHUNK_TICKET_STAGE_NONE) { + throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_NONE + ", not " + prev); + } + this.pushDelayedTicketOp( + ChunkHolderManager.TicketOperation.addOp( + chunk, + REGION_PLAYER_TICKET, LOADED_TICKET_LEVEL, this.idBoxed + ) + ); + chunks.add(chunk); + this.loadingQueue.enqueue(chunk); + } + + // here we need to flush tickets, as scheduleChunkLoad requires tickets to be propagated with addTicket = false + this.flushDelayedTicketOps(); + // we only need to call scheduleChunkLoad because the loaded ticket level is not enough to start the chunk + // load - only generate ticket levels start anything, but they start generation... + // propagate levels + // Note: this CAN call plugin logic, so it is VITAL that our bookkeeping logic is completely done by the time this is invoked + this.world.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); + + if (this.removed) { + // process ticket updates may invoke plugin logic, which may remove this player + return; + } + + for (int i = 0; i < maxLoadsThisTick; ++i) { + final long queuedLoadChunk = chunks.getLong(i); + final int queuedChunkX = CoordinateUtils.getChunkX(queuedLoadChunk); + final int queuedChunkZ = CoordinateUtils.getChunkZ(queuedLoadChunk); + this.world.chunkTaskScheduler.scheduleChunkLoad( + queuedChunkX, queuedChunkZ, ChunkStatus.EMPTY, false, PrioritisedExecutor.Priority.NORMAL, null + ); + if (this.removed) { + return; + } + } + } + + // try to progress chunk generations + while (!this.generatingQueue.isEmpty()) { + final long pendingGenChunk = this.generatingQueue.firstLong(); + final int pendingChunkX = CoordinateUtils.getChunkX(pendingGenChunk); + final int pendingChunkZ = CoordinateUtils.getChunkZ(pendingGenChunk); + final LevelChunk pending = this.world.chunkSource.getChunkAtIfLoadedMainThreadNoCache(pendingChunkX, pendingChunkZ); + if (pending == null) { + // nothing to do here + break; + } + + // chunk has generated, so we can take it out of queue + this.generatingQueue.dequeueLong(); + + final byte prev = this.chunkTicketStage.put(pendingGenChunk, CHUNK_TICKET_STAGE_GENERATED); + if (prev != CHUNK_TICKET_STAGE_GENERATING) { + throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_GENERATING + ", not " + prev); + } + + // try to move to send queue + if (this.wantChunkSent(pendingChunkX, pendingChunkZ)) { + this.sendQueue.enqueue(pendingGenChunk); + } + // try to move to tick queue + if (this.wantChunkTicked(pendingChunkX, pendingChunkZ)) { + this.tickingQueue.enqueue(pendingGenChunk); + } + } + + // try to push more chunk generations + final long maxGens = Math.max(0L, Math.min(MAX_RATE, Math.min(this.genQueue.size(), this.getMaxChunkGenerates()))); + final int maxGensThisTick = (int)this.chunkGenerateTicketLimiter.takeAllocation(time, genRate, maxGens); + int ratedGensThisTick = 0; + while (!this.genQueue.isEmpty()) { + final long chunkKey = this.genQueue.firstLong(); + final int chunkX = CoordinateUtils.getChunkX(chunkKey); + final int chunkZ = CoordinateUtils.getChunkZ(chunkKey); + final ChunkAccess chunk = this.world.chunkSource.getChunkAtImmediately(chunkX, chunkZ); + if (chunk.getStatus() != ChunkStatus.FULL) { + // only rate limit actual generations + if ((ratedGensThisTick + 1) > maxGensThisTick) { + break; + } + ++ratedGensThisTick; + } + + this.genQueue.dequeueLong(); + + final byte prev = this.chunkTicketStage.put(chunkKey, CHUNK_TICKET_STAGE_GENERATING); + if (prev != CHUNK_TICKET_STAGE_LOADED) { + throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_LOADED + ", not " + prev); + } + this.pushDelayedTicketOp( + ChunkHolderManager.TicketOperation.addAndRemove( + chunkKey, + REGION_PLAYER_TICKET, GENERATED_TICKET_LEVEL, this.idBoxed, + REGION_PLAYER_TICKET, LOADED_TICKET_LEVEL, this.idBoxed + ) + ); + this.generatingQueue.enqueue(chunkKey); + } + + // try to pull ticking chunks + tick_check_outer: + while (!this.tickingQueue.isEmpty()) { + final long pendingTicking = this.tickingQueue.firstLong(); + final int pendingChunkX = CoordinateUtils.getChunkX(pendingTicking); + final int pendingChunkZ = CoordinateUtils.getChunkZ(pendingTicking); + + final int tickingReq = 2; + for (int dz = -tickingReq; dz <= tickingReq; ++dz) { + for (int dx = -tickingReq; dx <= tickingReq; ++dx) { + if ((dx | dz) == 0) { + continue; + } + final long neighbour = CoordinateUtils.getChunkKey(dx + pendingChunkX, dz + pendingChunkZ); + final byte stage = this.chunkTicketStage.get(neighbour); + if (stage != CHUNK_TICKET_STAGE_GENERATED && stage != CHUNK_TICKET_STAGE_TICK) { + break tick_check_outer; + } + } + } + // only gets here if all neighbours were marked as generated or ticking themselves + this.tickingQueue.dequeueLong(); + this.pushDelayedTicketOp( + ChunkHolderManager.TicketOperation.addAndRemove( + pendingTicking, + REGION_PLAYER_TICKET, TICK_TICKET_LEVEL, this.idBoxed, + REGION_PLAYER_TICKET, GENERATED_TICKET_LEVEL, this.idBoxed + ) + ); + // there is no queue to add after ticking + final byte prev = this.chunkTicketStage.put(pendingTicking, CHUNK_TICKET_STAGE_TICK); + if (prev != CHUNK_TICKET_STAGE_GENERATED) { + throw new IllegalStateException("Previous state should be " + CHUNK_TICKET_STAGE_GENERATED + ", not " + prev); + } + } + + // try to pull sending chunks + final long maxSends = Math.max(0L, Math.min(MAX_RATE, Integer.MAX_VALUE)); // no logic to track concurrent sends + final int maxSendsThisTick = Math.min((int)this.chunkSendLimiter.takeAllocation(time, sendRate, maxSends), this.sendQueue.size()); + // we do not return sends that we took from the allocation back because we want to limit the max send rate, not target it + for (int i = 0; i < maxSendsThisTick; ++i) { + final long pendingSend = this.sendQueue.firstLong(); + final int pendingSendX = CoordinateUtils.getChunkX(pendingSend); + final int pendingSendZ = CoordinateUtils.getChunkZ(pendingSend); + final LevelChunk chunk = this.world.chunkSource.getChunkAtIfLoadedMainThreadNoCache(pendingSendX, pendingSendZ); + if (!chunk.areNeighboursLoaded(1) || !TickThread.isTickThreadFor(this.world, pendingSendX, pendingSendZ)) { + // nothing to do + // the target chunk may not be owned by this region, but this should be resolved in the future + break; + } + if (!chunk.isPostProcessingDone) { + // not yet post-processed, need to do this so that tile entities can properly be sent to clients + chunk.postProcessGeneration(); + // check if there was any recursive action + if (this.removed || this.sendQueue.isEmpty() || this.sendQueue.firstLong() != pendingSend) { + return; + } // else: good to dequeue and send, fall through + } + this.sendQueue.dequeueLong(); + + this.sendChunk(pendingSendX, pendingSendZ); + if (this.removed) { + // sendChunk may invoke plugin logic + return; + } + } + + this.flushDelayedTicketOps(); + // we assume propagate ticket levels happens after this call + } + + void add() { + TickThread.ensureTickThread(this.player, "Cannot add player asynchronously"); + if (this.removed) { + throw new IllegalStateException("Adding removed player chunk loader"); + } + final ViewDistances playerDistances = this.player.getViewDistances(); + final ViewDistances worldDistances = this.world.getViewDistances(); + final int chunkX = this.player.chunkPosition().x; + final int chunkZ = this.player.chunkPosition().z; + + final int tickViewDistance = getTickDistance(playerDistances.tickViewDistance, worldDistances.tickViewDistance); + // load view cannot be less-than tick view + 1 + final int loadViewDistance = getLoadViewDistance(tickViewDistance, playerDistances.loadViewDistance, worldDistances.loadViewDistance); + // send view cannot be greater-than load view + final int clientViewDistance = getClientViewDistance(this.player); + final int sendViewDistance = getSendViewDistance(loadViewDistance, clientViewDistance, playerDistances.sendViewDistance, worldDistances.sendViewDistance); + + // send view distances + this.player.connection.send(this.updateClientChunkRadius(sendViewDistance)); + this.player.connection.send(this.updateClientSimulationDistance(tickViewDistance)); + + // add to distance maps + this.broadcastMap.add(chunkX, chunkZ, sendViewDistance + 1); + this.loadTicketCleanup.add(chunkX, chunkZ, loadViewDistance + 1); + this.tickMap.add(chunkX, chunkZ, tickViewDistance); + + // update chunk center + this.player.connection.send(this.updateClientChunkCenter(chunkX, chunkZ)); + + // now we can update + this.update(); + } + + private boolean isLoadedChunkGeneratable(final int chunkX, final int chunkZ) { + return this.isLoadedChunkGeneratable(this.world.chunkSource.getChunkAtImmediately(chunkX, chunkZ)); + } + + private boolean isLoadedChunkGeneratable(final ChunkAccess chunkAccess) { + final BelowZeroRetrogen belowZeroRetrogen; + // see PortalForcer#findPortalAround + return chunkAccess != null && ( + chunkAccess.getStatus() == ChunkStatus.FULL || + ((belowZeroRetrogen = chunkAccess.getBelowZeroRetrogen()) != null && belowZeroRetrogen.targetStatus().isOrAfter(ChunkStatus.SPAWN)) + ); + } + + void update() { + TickThread.ensureTickThread(this.player, "Cannot update player asynchronously"); + if (this.removed) { + throw new IllegalStateException("Updating removed player chunk loader"); + } + final ViewDistances playerDistances = this.player.getViewDistances(); + final ViewDistances worldDistances = this.world.getViewDistances(); + + final int tickViewDistance = getTickDistance(playerDistances.tickViewDistance, worldDistances.tickViewDistance); + // load view cannot be less-than tick view + 1 + final int loadViewDistance = getLoadViewDistance(tickViewDistance, playerDistances.loadViewDistance, worldDistances.loadViewDistance); + // send view cannot be greater-than load view + final int clientViewDistance = getClientViewDistance(this.player); + final int sendViewDistance = getSendViewDistance(loadViewDistance, clientViewDistance, playerDistances.sendViewDistance, worldDistances.sendViewDistance); + + final ChunkPos playerPos = this.player.chunkPosition(); + final boolean canGenerateChunks = this.canPlayerGenerateChunks(); + final int currentChunkX = playerPos.x; + final int currentChunkZ = playerPos.z; + + final int prevChunkX = this.lastChunkX; + final int prevChunkZ = this.lastChunkZ; + + if ( + // has view distance stayed the same? + sendViewDistance == this.lastSendDistance + && loadViewDistance == this.lastLoadDistance + && tickViewDistance == this.lastTickDistance + + // has our chunk stayed the same? + && prevChunkX == currentChunkX + && prevChunkZ == currentChunkZ + + // can we still generate chunks? + && this.canGenerateChunks == canGenerateChunks + ) { + // nothing we care about changed, so we're not re-calculating + return; + } + + // update distance maps + this.broadcastMap.update(currentChunkX, currentChunkZ, sendViewDistance + 1); + this.loadTicketCleanup.update(currentChunkX, currentChunkZ, loadViewDistance + 1); + this.tickMap.update(currentChunkX, currentChunkZ, tickViewDistance); + if (sendViewDistance > loadViewDistance || tickViewDistance > loadViewDistance) { + throw new IllegalStateException(); + } + + // update VDs for client + // this should be after the distance map updates, as they will send unload packets + if (this.lastSentChunkRadius != sendViewDistance) { + this.player.connection.send(this.updateClientChunkRadius(sendViewDistance)); + } + if (this.lastSentSimulationDistance != tickViewDistance) { + this.player.connection.send(this.updateClientSimulationDistance(tickViewDistance)); + } + + this.sendQueue.clear(); + this.tickingQueue.clear(); + this.generatingQueue.clear(); + this.genQueue.clear(); + this.loadingQueue.clear(); + this.loadQueue.clear(); + + this.lastChunkX = currentChunkX; + this.lastChunkZ = currentChunkZ; + this.lastSendDistance = sendViewDistance; + this.lastLoadDistance = loadViewDistance; + this.lastTickDistance = tickViewDistance; + this.canGenerateChunks = canGenerateChunks; + + // +1 since we need to load chunks +1 around the load view distance... + final long[] toIterate = SEARCH_RADIUS_ITERATION_LIST[loadViewDistance + 1]; + // the iteration order is by increasing manhattan distance - so, we do NOT need to + // sort anything in the queue! + for (final long deltaChunk : toIterate) { + final int dx = CoordinateUtils.getChunkX(deltaChunk); + final int dz = CoordinateUtils.getChunkZ(deltaChunk); + final int chunkX = dx + currentChunkX; + final int chunkZ = dz + currentChunkZ; + final long chunk = CoordinateUtils.getChunkKey(chunkX, chunkZ); + final int squareDistance = Math.max(Math.abs(dx), Math.abs(dz)); + final int manhattanDistance = Math.abs(dx) + Math.abs(dz); + + // since chunk sending is not by radius alone, we need an extra check here to account for + // everything <= sendDistance + // Note: Vanilla may want to send chunks outside the send view distance, so we do need + // the dist <= view check + final boolean sendChunk = (squareDistance <= (sendViewDistance + 1)) + && wantChunkLoaded(currentChunkX, currentChunkZ, chunkX, chunkZ, sendViewDistance); + final boolean sentChunk = sendChunk ? this.sentChunks.contains(chunk) : this.sentChunks.remove(chunk); + + if (!sendChunk && sentChunk) { + // have sent the chunk, but don't want it anymore + // unload it now + this.sendUnloadChunkRaw(chunkX, chunkZ); + } + + final byte stage = this.chunkTicketStage.get(chunk); + switch (stage) { + case CHUNK_TICKET_STAGE_NONE: { + // we want the chunk to be at least loaded + this.loadQueue.enqueue(chunk); + break; + } + case CHUNK_TICKET_STAGE_LOADING: { + this.loadingQueue.enqueue(chunk); + break; + } + case CHUNK_TICKET_STAGE_LOADED: { + if (canGenerateChunks || this.isLoadedChunkGeneratable(chunkX, chunkZ)) { + this.genQueue.enqueue(chunk); + } + break; + } + case CHUNK_TICKET_STAGE_GENERATING: { + this.generatingQueue.enqueue(chunk); + break; + } + case CHUNK_TICKET_STAGE_GENERATED: { + if (sendChunk && !sentChunk) { + this.sendQueue.enqueue(chunk); + } + if (squareDistance <= tickViewDistance) { + this.tickingQueue.enqueue(chunk); + } + break; + } + case CHUNK_TICKET_STAGE_TICK: { + if (sendChunk && !sentChunk) { + this.sendQueue.enqueue(chunk); + } + break; + } + default: { + throw new IllegalStateException("Unknown stage: " + stage); + } + } + } + + // update the chunk center + // this must be done last so that the client does not ignore any of our unload chunk packets above + if (this.lastSentChunkCenterX != currentChunkX || this.lastSentChunkCenterZ != currentChunkZ) { + this.player.connection.send(this.updateClientChunkCenter(currentChunkX, currentChunkZ)); + } + + this.flushDelayedTicketOps(); + } + + void remove() { + TickThread.ensureTickThread(this.player, "Cannot add player asynchronously"); + if (this.removed) { + throw new IllegalStateException("Removing removed player chunk loader"); + } + this.removed = true; + // sends the chunk unload packets + this.broadcastMap.remove(); + // cleans up loading/generating tickets + this.loadTicketCleanup.remove(); + // cleans up ticking tickets + this.tickMap.remove(); + + // purge queues + this.sendQueue.clear(); + this.tickingQueue.clear(); + this.generatingQueue.clear(); + this.genQueue.clear(); + this.loadingQueue.clear(); + this.loadQueue.clear(); + + // flush ticket changes + this.flushDelayedTicketOps(); + + // now all tickets should be removed, which is all of our external state + } + } + + // TODO rebase into util patch + private static final class AllocatingRateLimiter { + + // max difference granularity in ns + private static final long MAX_GRANULARITY = TimeUnit.SECONDS.toNanos(1L); + + private double allocation; + private long lastAllocationUpdate; + private double takeCarry; + private long lastTakeUpdate; + + // rate in units/s, and time in ns + public void tickAllocation(final long time, final double rate, final double maxAllocation) { + final long diff = Math.min(MAX_GRANULARITY, time - this.lastAllocationUpdate); + this.lastAllocationUpdate = time; + + this.allocation = Math.min(maxAllocation - this.takeCarry, this.allocation + rate * (diff*1.0E-9D)); + } + + // rate in units/s, and time in ns + public long takeAllocation(final long time, final double rate, final long maxTake) { + if (maxTake < 1L) { + return 0L; + } + + double ret = this.takeCarry; + final long diff = Math.min(MAX_GRANULARITY, time - this.lastTakeUpdate); + this.lastTakeUpdate = time; + + // note: abs(takeCarry) <= 1.0 + final double take = Math.min(Math.min((double)maxTake - this.takeCarry, this.allocation), rate * (diff*1.0E-9)); + + ret += take; + this.allocation -= take; + + final long retInteger = (long)Math.floor(ret); + this.takeCarry = ret - (double)retInteger; + + return retInteger; + } + } + + static final class CountedSRSWLinkedQueue { + + private final SRSWLinkedQueue queue = new SRSWLinkedQueue<>(); + private volatile long countAdded; + private volatile long countRemoved; + + private static final VarHandle COUNT_ADDED_HANDLE = ConcurrentUtil.getVarHandle(CountedSRSWLinkedQueue.class, "countAdded", long.class); + private static final VarHandle COUNT_REMOVED_HANDLE = ConcurrentUtil.getVarHandle(CountedSRSWLinkedQueue.class, "countRemoved", long.class); + + private long getCountAddedPlain() { + return (long)COUNT_ADDED_HANDLE.get(this); + } + + private long getCountAddedAcquire() { + return (long)COUNT_ADDED_HANDLE.getAcquire(this); + } + + private void setCountAddedRelease(final long to) { + COUNT_ADDED_HANDLE.setRelease(this, to); + } + + private long getCountRemovedPlain() { + return (long)COUNT_REMOVED_HANDLE.get(this); + } + + private long getCountRemovedAcquire() { + return (long)COUNT_REMOVED_HANDLE.getAcquire(this); + } + + private void setCountRemovedRelease(final long to) { + COUNT_REMOVED_HANDLE.setRelease(this, to); + } + + public void add(final E element) { + this.setCountAddedRelease(this.getCountAddedPlain() + 1L); + this.queue.addLast(element); + } + + public E poll() { + final E ret = this.queue.poll(); + if (ret != null) { + this.setCountRemovedRelease(this.getCountRemovedPlain() + 1L); + } + + return ret; + } + + public long size() { + final long removed = this.getCountRemovedAcquire(); + final long added = this.getCountAddedAcquire(); + + return added - removed; + } + } + + private static class CustomLongArray extends LongArrayList { + + public CustomLongArray() { + super(); + } + + public CustomLongArray(final int expected) { + super(expected); + } + + public boolean addAll(final CustomLongArray list) { + this.addElements(this.size, list.a, 0, list.size); + return list.size != 0; + } + + public void addUnchecked(final long value) { + this.a[this.size++] = value; + } + + public void forceSize(final int to) { + this.size = to; + } + + @Override + public int hashCode() { + long h = 1L; + + Objects.checkFromToIndex(0, this.size, this.a.length); + + for (int i = 0; i < this.size; ++i) { + h = it.unimi.dsi.fastutil.HashCommon.mix(h + this.a[i]); + } + + return (int)h; + } + + @Override + public boolean equals(final Object o) { + if (o == this) { + return true; + } + + if (!(o instanceof CustomLongArray other)) { + return false; + } + + return this.size == other.size && Arrays.equals(this.a, 0, this.size, other.a, 0, this.size); + } + } + + private static int getDistanceSize(final int radius, final int max) { + if (radius == 0) { + return 1; + } + final int diff = radius - max; + if (diff <= 0) { + return 4*radius; + } + return 4*(max - Math.max(0, diff - 1)); + } + + private static int getQ1DistanceSize(final int radius, final int max) { + if (radius == 0) { + return 1; + } + final int diff = radius - max; + if (diff <= 0) { + return radius+1; + } + return max - diff + 1; + } + + private static final class BasicFIFOLQueue { + + private final long[] values; + private int head, tail; + + public BasicFIFOLQueue(final int cap) { + if (cap <= 1) { + throw new IllegalArgumentException(); + } + this.values = new long[cap]; + } + + public boolean isEmpty() { + return this.head == this.tail; + } + + public long removeFirst() { + final long ret = this.values[this.head]; + + if (this.head == this.tail) { + throw new IllegalStateException(); + } + + ++this.head; + if (this.head == this.values.length) { + this.head = 0; + } + + return ret; + } + + public void addLast(final long value) { + this.values[this.tail++] = value; + + if (this.tail == this.head) { + throw new IllegalStateException(); + } + + if (this.tail == this.values.length) { + this.tail = 0; + } + } + } + + private static CustomLongArray[] makeQ1BFS(final int radius) { + final CustomLongArray[] ret = new CustomLongArray[2 * radius + 1]; + final BasicFIFOLQueue queue = new BasicFIFOLQueue(Math.max(1, 4 * radius) + 1); + final LongOpenHashSet seen = new LongOpenHashSet((radius + 1) * (radius + 1)); + + seen.add(CoordinateUtils.getChunkKey(0, 0)); + queue.addLast(CoordinateUtils.getChunkKey(0, 0)); + while (!queue.isEmpty()) { + final long chunk = queue.removeFirst(); + final int chunkX = CoordinateUtils.getChunkX(chunk); + final int chunkZ = CoordinateUtils.getChunkZ(chunk); + + final int index = Math.abs(chunkX) + Math.abs(chunkZ); + final CustomLongArray list = ret[index]; + if (list != null) { + list.addUnchecked(chunk); + } else { + (ret[index] = new CustomLongArray(getQ1DistanceSize(index, radius))).addUnchecked(chunk); + } + + for (int i = 0; i < 4; ++i) { + // 0 -> -1, 0 + // 1 -> 0, -1 + // 2 -> 1, 0 + // 3 -> 0, 1 + + final int signInv = -(i >>> 1); // 2/3 -> -(1), 0/1 -> -(0) + // note: -n = (~n) + 1 + // (n ^ signInv) - signInv = signInv == 0 ? ((n ^ 0) - 0 = n) : ((n ^ -1) - (-1) = ~n + 1) + + final int axis = i & 1; // 0/2 -> 0, 1/3 -> 1 + final int dx = ((axis - 1) ^ signInv) - signInv; // 0 -> -1, 1 -> 0 + final int dz = (-axis ^ signInv) - signInv; // 0 -> 0, 1 -> -1 + + final int neighbourX = chunkX + dx; + final int neighbourZ = chunkZ + dz; + final long neighbour = CoordinateUtils.getChunkKey(neighbourX, neighbourZ); + + if ((neighbourX | neighbourZ) < 0 || Math.max(Math.abs(neighbourX), Math.abs(neighbourZ)) > radius) { + // don't enqueue out of range + continue; + } + + if (!seen.add(neighbour)) { + continue; + } + + queue.addLast(neighbour); + } + } + + return ret; + } + + // doesn't appear worth optimising this function now, even though it's 70% of the call + private static CustomLongArray spread(final CustomLongArray input, final int size) { + final LongLinkedOpenHashSet notAdded = new LongLinkedOpenHashSet(input); + final CustomLongArray added = new CustomLongArray(size); + + while (!notAdded.isEmpty()) { + if (added.isEmpty()) { + added.addUnchecked(notAdded.removeLastLong()); + continue; + } + + long maxChunk = -1L; + int maxDist = 0; + + // select the chunk from the not yet added set that has the largest minimum distance from + // the current set of added chunks + + for (final LongIterator iterator = notAdded.iterator(); iterator.hasNext();) { + final long chunkKey = iterator.nextLong(); + final int chunkX = CoordinateUtils.getChunkX(chunkKey); + final int chunkZ = CoordinateUtils.getChunkZ(chunkKey); + + int minDist = Integer.MAX_VALUE; + + final int len = added.size(); + final long[] addedArr = added.elements(); + Objects.checkFromToIndex(0, len, addedArr.length); + for (int i = 0; i < len; ++i) { + final long addedKey = addedArr[i]; + final int addedX = CoordinateUtils.getChunkX(addedKey); + final int addedZ = CoordinateUtils.getChunkZ(addedKey); + + // here we use square distance because chunk generation uses neighbours in a square radius + final int dist = Math.max(Math.abs(addedX - chunkX), Math.abs(addedZ - chunkZ)); + + minDist = Math.min(dist, minDist); + } + + if (minDist > maxDist) { + maxDist = minDist; + maxChunk = chunkKey; + } + } + + // move the selected chunk from the not added set to the added set + + if (!notAdded.remove(maxChunk)) { + throw new IllegalStateException(); + } + + added.addUnchecked(maxChunk); + } + + return added; + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java new file mode 100644 index 0000000000000000000000000000000000000000..15ee41452992714108efe53b708b5a4e1da7c1ff --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/entity/EntityLookup.java @@ -0,0 +1,902 @@ +package io.papermc.paper.chunk.system.entity; + +import com.destroystokyo.paper.util.maplist.EntityList; +import com.mojang.logging.LogUtils; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import io.papermc.paper.util.WorldUtil; +import io.papermc.paper.world.ChunkEntitySlices; +import it.unimi.dsi.fastutil.ints.Int2ReferenceOpenHashMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; +import it.unimi.dsi.fastutil.objects.Object2ReferenceOpenHashMap; +import net.minecraft.core.BlockPos; +import io.papermc.paper.chunk.system.ChunkSystem; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.util.AbortableIterationConsumer; +import net.minecraft.util.Mth; +import net.minecraft.world.entity.Entity; +import net.minecraft.world.entity.EntityType; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.entity.EntityInLevelCallback; +import net.minecraft.world.level.entity.EntityTypeTest; +import net.minecraft.world.level.entity.LevelCallback; +import net.minecraft.server.level.FullChunkStatus; +import net.minecraft.world.level.entity.LevelEntityGetter; +import net.minecraft.world.level.entity.Visibility; +import net.minecraft.world.phys.AABB; +import net.minecraft.world.phys.Vec3; +import org.jetbrains.annotations.NotNull; +import org.jetbrains.annotations.Nullable; +import org.slf4j.Logger; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Iterator; +import java.util.List; +import java.util.NoSuchElementException; +import java.util.UUID; +import java.util.concurrent.locks.StampedLock; +import java.util.function.Consumer; +import java.util.function.Predicate; + +public final class EntityLookup implements LevelEntityGetter { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + protected static final int REGION_SHIFT = 5; + protected static final int REGION_MASK = (1 << REGION_SHIFT) - 1; + protected static final int REGION_SIZE = 1 << REGION_SHIFT; + + public final ServerLevel world; + + private final StampedLock stateLock = new StampedLock(); + protected final Long2ObjectOpenHashMap regions = new Long2ObjectOpenHashMap<>(128, 0.5f); + + private final int minSection; // inclusive + private final int maxSection; // inclusive + private final LevelCallback worldCallback; + + private final StampedLock entityByLock = new StampedLock(); + private final Int2ReferenceOpenHashMap entityById = new Int2ReferenceOpenHashMap<>(); + private final Object2ReferenceOpenHashMap entityByUUID = new Object2ReferenceOpenHashMap<>(); + private final EntityList accessibleEntities = new EntityList(); + + public EntityLookup(final ServerLevel world, final LevelCallback worldCallback) { + this.world = world; + this.minSection = WorldUtil.getMinSection(world); + this.maxSection = WorldUtil.getMaxSection(world); + this.worldCallback = worldCallback; + } + + private static Entity maskNonAccessible(final Entity entity) { + if (entity == null) { + return null; + } + final Visibility visibility = EntityLookup.getEntityStatus(entity); + return visibility.isAccessible() ? entity : null; + } + + @Nullable + @Override + public Entity get(final int id) { + final long attempt = this.entityByLock.tryOptimisticRead(); + if (attempt != 0L) { + try { + final Entity ret = this.entityById.get(id); + + if (this.entityByLock.validate(attempt)) { + return maskNonAccessible(ret); + } + } catch (final Error error) { + throw error; + } catch (final Throwable thr) { + // ignore + } + } + + this.entityByLock.readLock(); + try { + return maskNonAccessible(this.entityById.get(id)); + } finally { + this.entityByLock.tryUnlockRead(); + } + } + + @Nullable + @Override + public Entity get(final UUID id) { + final long attempt = this.entityByLock.tryOptimisticRead(); + if (attempt != 0L) { + try { + final Entity ret = this.entityByUUID.get(id); + + if (this.entityByLock.validate(attempt)) { + return maskNonAccessible(ret); + } + } catch (final Error error) { + throw error; + } catch (final Throwable thr) { + // ignore + } + } + + this.entityByLock.readLock(); + try { + return maskNonAccessible(this.entityByUUID.get(id)); + } finally { + this.entityByLock.tryUnlockRead(); + } + } + + public boolean hasEntity(final UUID uuid) { + return this.get(uuid) != null; + } + + public String getDebugInfo() { + return "count_id:" + this.entityById.size() + ",count_uuid:" + this.entityByUUID.size() + ",region_count:" + this.regions.size(); + } + + static final class ArrayIterable implements Iterable { + + private final T[] array; + private final int off; + private final int length; + + public ArrayIterable(final T[] array, final int off, final int length) { + this.array = array; + this.off = off; + this.length = length; + if (length > array.length) { + throw new IllegalArgumentException("Length must be no greater-than the array length"); + } + } + + @NotNull + @Override + public Iterator iterator() { + return new ArrayIterator<>(this.array, this.off, this.length); + } + + static final class ArrayIterator implements Iterator { + + private final T[] array; + private int off; + private final int length; + + public ArrayIterator(final T[] array, final int off, final int length) { + this.array = array; + this.off = off; + this.length = length; + } + + @Override + public boolean hasNext() { + return this.off < this.length; + } + + @Override + public T next() { + if (this.off >= this.length) { + throw new NoSuchElementException(); + } + return this.array[this.off++]; + } + + @Override + public void remove() { + throw new UnsupportedOperationException(); + } + } + } + + @Override + public Iterable getAll() { + return new ArrayIterable<>(this.accessibleEntities.getRawData(), 0, this.accessibleEntities.size()); + } + + public Entity[] getAllCopy() { + return Arrays.copyOf(this.accessibleEntities.getRawData(), this.accessibleEntities.size(), Entity[].class); + } + + @Override + public void get(final EntityTypeTest filter, final AbortableIterationConsumer action) { + final Int2ReferenceOpenHashMap entityCopy; + + this.entityByLock.readLock(); + try { + entityCopy = this.entityById.clone(); + } finally { + this.entityByLock.tryUnlockRead(); + } + for (final Entity entity : entityCopy.values()) { + final Visibility visibility = EntityLookup.getEntityStatus(entity); + if (!visibility.isAccessible()) { + continue; + } + final U casted = filter.tryCast(entity); + if (casted != null && action.accept(casted).shouldAbort()) { + break; + } + } + } + + @Override + public void get(final AABB box, final Consumer action) { + List entities = new ArrayList<>(); + this.getEntitiesWithoutDragonParts(null, box, entities, null); + for (int i = 0, len = entities.size(); i < len; ++i) { + action.accept(entities.get(i)); + } + } + + @Override + public void get(final EntityTypeTest filter, final AABB box, final AbortableIterationConsumer action) { + List entities = new ArrayList<>(); + this.getEntitiesWithoutDragonParts(null, box, entities, null); + for (int i = 0, len = entities.size(); i < len; ++i) { + final U casted = filter.tryCast(entities.get(i)); + if (casted != null && action.accept(casted).shouldAbort()) { + break; + } + } + } + + public void entityStatusChange(final Entity entity, final ChunkEntitySlices slices, final Visibility oldVisibility, final Visibility newVisibility, final boolean moved, + final boolean created, final boolean destroyed) { + TickThread.ensureTickThread(entity, "Entity status change must only happen on the main thread"); + + if (entity.updatingSectionStatus) { + // recursive status update + LOGGER.error("Cannot recursively update entity chunk status for entity " + entity, new Throwable()); + return; + } + + final boolean entityStatusUpdateBefore = slices == null ? false : slices.startPreventingStatusUpdates(); + + if (entityStatusUpdateBefore) { + LOGGER.error("Cannot update chunk status for entity " + entity + " since entity chunk (" + slices.chunkX + "," + slices.chunkZ + ") is receiving update", new Throwable()); + return; + } + + try { + final Boolean ticketBlockBefore = this.world.chunkTaskScheduler.chunkHolderManager.blockTicketUpdates(); + try { + entity.updatingSectionStatus = true; + try { + if (created) { + EntityLookup.this.worldCallback.onCreated(entity); + } + + if (oldVisibility == newVisibility) { + if (moved && newVisibility.isAccessible()) { + EntityLookup.this.worldCallback.onSectionChange(entity); + } + return; + } + + if (newVisibility.ordinal() > oldVisibility.ordinal()) { + // status upgrade + if (!oldVisibility.isAccessible() && newVisibility.isAccessible()) { + this.accessibleEntities.add(entity); + EntityLookup.this.worldCallback.onTrackingStart(entity); + } + + if (!oldVisibility.isTicking() && newVisibility.isTicking()) { + EntityLookup.this.worldCallback.onTickingStart(entity); + } + } else { + // status downgrade + if (oldVisibility.isTicking() && !newVisibility.isTicking()) { + EntityLookup.this.worldCallback.onTickingEnd(entity); + } + + if (oldVisibility.isAccessible() && !newVisibility.isAccessible()) { + this.accessibleEntities.remove(entity); + EntityLookup.this.worldCallback.onTrackingEnd(entity); + } + } + + if (moved && newVisibility.isAccessible()) { + EntityLookup.this.worldCallback.onSectionChange(entity); + } + + if (destroyed) { + EntityLookup.this.worldCallback.onDestroyed(entity); + } + } finally { + entity.updatingSectionStatus = false; + } + } finally { + this.world.chunkTaskScheduler.chunkHolderManager.unblockTicketUpdates(ticketBlockBefore); + } + } finally { + if (slices != null) { + slices.stopPreventingStatusUpdates(false); + } + } + } + + public void chunkStatusChange(final int x, final int z, final FullChunkStatus newStatus) { + this.getChunk(x, z).updateStatus(newStatus, this); + } + + public void addLegacyChunkEntities(final List entities, final ChunkPos forChunk) { + this.addEntityChunk(entities, forChunk, true); + } + + public void addEntityChunkEntities(final List entities, final ChunkPos forChunk) { + this.addEntityChunk(entities, forChunk, true); + } + + public void addWorldGenChunkEntities(final List entities, final ChunkPos forChunk) { + this.addEntityChunk(entities, forChunk, false); + } + + private void addRecursivelySafe(final Entity root, final boolean fromDisk) { + if (!this.addEntity(root, fromDisk)) { + // possible we are a passenger, and so should dismount from any valid entity in the world + root.stopRiding(true); + return; + } + for (final Entity passenger : root.getPassengers()) { + this.addRecursivelySafe(passenger, fromDisk); + } + } + + private void addEntityChunk(final List entities, final ChunkPos forChunk, final boolean fromDisk) { + for (int i = 0, len = entities.size(); i < len; ++i) { + final Entity entity = entities.get(i); + if (entity.isPassenger()) { + continue; + } + + if (!entity.chunkPosition().equals(forChunk)) { + LOGGER.warn("Root entity " + entity + " is outside of serialized chunk " + forChunk); + // can't set removed here, as we may not own the chunk position + // skip the entity + continue; + } + + final Vec3 rootPosition = entity.position(); + + // always adjust positions before adding passengers in case plugins access the entity, and so that + // they are added to the right entity chunk + for (final Entity passenger : entity.getIndirectPassengers()) { + if (!passenger.chunkPosition().equals(forChunk)) { + passenger.setPosRaw(rootPosition.x, rootPosition.y, rootPosition.z, true); + } + } + + this.addRecursivelySafe(entity, fromDisk); + } + } + + public boolean addNewEntity(final Entity entity) { + return this.addEntity(entity, false); + } + + public static Visibility getEntityStatus(final Entity entity) { + if (entity.isAlwaysTicking()) { + return Visibility.TICKING; + } + final FullChunkStatus entityStatus = entity.chunkStatus; + return Visibility.fromFullChunkStatus(entityStatus == null ? FullChunkStatus.INACCESSIBLE : entityStatus); + } + + private boolean addEntity(final Entity entity, final boolean fromDisk) { + final BlockPos pos = entity.blockPosition(); + final int sectionX = pos.getX() >> 4; + final int sectionY = Mth.clamp(pos.getY() >> 4, this.minSection, this.maxSection); + final int sectionZ = pos.getZ() >> 4; + TickThread.ensureTickThread(this.world, sectionX, sectionZ, "Cannot add entity off-main thread"); + + if (entity.isRemoved()) { + LOGGER.warn("Refusing to add removed entity: " + entity); + return false; + } + + if (entity.updatingSectionStatus) { + LOGGER.warn("Entity " + entity + " is currently prevented from being added/removed to world since it is processing section status updates", new Throwable()); + return false; + } + + if (fromDisk) { + ChunkSystem.onEntityPreAdd(this.world, entity); + if (entity.isRemoved()) { + // removed from checkDupeUUID call + return false; + } + } + + this.entityByLock.writeLock(); + try { + if (this.entityById.containsKey(entity.getId())) { + LOGGER.warn("Entity id already exists: " + entity.getId() + ", mapped to " + this.entityById.get(entity.getId()) + ", can't add " + entity); + return false; + } + if (this.entityByUUID.containsKey(entity.getUUID())) { + LOGGER.warn("Entity uuid already exists: " + entity.getUUID() + ", mapped to " + this.entityByUUID.get(entity.getUUID()) + ", can't add " + entity); + return false; + } + this.entityById.put(entity.getId(), entity); + this.entityByUUID.put(entity.getUUID(), entity); + } finally { + this.entityByLock.tryUnlockWrite(); + } + + entity.sectionX = sectionX; + entity.sectionY = sectionY; + entity.sectionZ = sectionZ; + final ChunkEntitySlices slices = this.getOrCreateChunk(sectionX, sectionZ); + if (!slices.addEntity(entity, sectionY)) { + LOGGER.warn("Entity " + entity + " added to world '" + this.world.getWorld().getName() + "', but was already contained in entity chunk (" + sectionX + "," + sectionZ + ")"); + } + + entity.setLevelCallback(new EntityCallback(entity)); + + this.entityStatusChange(entity, slices, Visibility.HIDDEN, getEntityStatus(entity), false, !fromDisk, false); + + return true; + } + + public boolean canRemoveEntity(final Entity entity) { + if (entity.updatingSectionStatus) { + return false; + } + + final int sectionX = entity.sectionX; + final int sectionZ = entity.sectionZ; + final ChunkEntitySlices slices = this.getChunk(sectionX, sectionZ); + return slices == null || !slices.isPreventingStatusUpdates(); + } + + private void removeEntity(final Entity entity) { + final int sectionX = entity.sectionX; + final int sectionY = entity.sectionY; + final int sectionZ = entity.sectionZ; + TickThread.ensureTickThread(this.world, sectionX, sectionZ, "Cannot remove entity off-main"); + if (!entity.isRemoved()) { + throw new IllegalStateException("Only call Entity#setRemoved to remove an entity"); + } + final ChunkEntitySlices slices = this.getChunk(sectionX, sectionZ); + // all entities should be in a chunk + if (slices == null) { + LOGGER.warn("Cannot remove entity " + entity + " from null entity slices (" + sectionX + "," + sectionZ + ")"); + } else { + if (slices.isPreventingStatusUpdates()) { + throw new IllegalStateException("Attempting to remove entity " + entity + " from entity slices (" + sectionX + "," + sectionZ + ") that is receiving status updates"); + } + if (!slices.removeEntity(entity, sectionY)) { + LOGGER.warn("Failed to remove entity " + entity + " from entity slices (" + sectionX + "," + sectionZ + ")"); + } + } + entity.sectionX = entity.sectionY = entity.sectionZ = Integer.MIN_VALUE; + + this.entityByLock.writeLock(); + try { + if (!this.entityById.remove(entity.getId(), entity)) { + LOGGER.warn("Failed to remove entity " + entity + " by id, current entity mapped: " + this.entityById.get(entity.getId())); + } + if (!this.entityByUUID.remove(entity.getUUID(), entity)) { + LOGGER.warn("Failed to remove entity " + entity + " by uuid, current entity mapped: " + this.entityByUUID.get(entity.getUUID())); + } + } finally { + this.entityByLock.tryUnlockWrite(); + } + } + + private ChunkEntitySlices moveEntity(final Entity entity) { + // ensure we own the entity + TickThread.ensureTickThread(entity, "Cannot move entity off-main"); + + final BlockPos newPos = entity.blockPosition(); + final int newSectionX = newPos.getX() >> 4; + final int newSectionY = Mth.clamp(newPos.getY() >> 4, this.minSection, this.maxSection); + final int newSectionZ = newPos.getZ() >> 4; + + if (newSectionX == entity.sectionX && newSectionY == entity.sectionY && newSectionZ == entity.sectionZ) { + return null; + } + + // ensure the new section is owned by this tick thread + TickThread.ensureTickThread(this.world, newSectionX, newSectionZ, "Cannot move entity off-main"); + + // ensure the old section is owned by this tick thread + TickThread.ensureTickThread(this.world, entity.sectionX, entity.sectionZ, "Cannot move entity off-main"); + + final ChunkEntitySlices old = this.getChunk(entity.sectionX, entity.sectionZ); + final ChunkEntitySlices slices = this.getOrCreateChunk(newSectionX, newSectionZ); + + if (!old.removeEntity(entity, entity.sectionY)) { + LOGGER.warn("Could not remove entity " + entity + " from its old chunk section (" + entity.sectionX + "," + entity.sectionY + "," + entity.sectionZ + ") since it was not contained in the section"); + } + + if (!slices.addEntity(entity, newSectionY)) { + LOGGER.warn("Could not add entity " + entity + " to its new chunk section (" + newSectionX + "," + newSectionY + "," + newSectionZ + ") as it is already contained in the section"); + } + + entity.sectionX = newSectionX; + entity.sectionY = newSectionY; + entity.sectionZ = newSectionZ; + + return slices; + } + + public void getEntitiesWithoutDragonParts(final Entity except, final AABB box, final List into, final Predicate predicate) { + final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; + final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; + final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; + final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; + + final int minRegionX = minChunkX >> REGION_SHIFT; + final int minRegionZ = minChunkZ >> REGION_SHIFT; + final int maxRegionX = maxChunkX >> REGION_SHIFT; + final int maxRegionZ = maxChunkZ >> REGION_SHIFT; + + for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { + final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; + final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; + + for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { + final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); + + if (region == null) { + continue; + } + + final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; + final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; + + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); + if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { + continue; + } + + chunk.getEntitiesWithoutDragonParts(except, box, into, predicate); + } + } + } + } + } + + public void getEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { + final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; + final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; + final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; + final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; + + final int minRegionX = minChunkX >> REGION_SHIFT; + final int minRegionZ = minChunkZ >> REGION_SHIFT; + final int maxRegionX = maxChunkX >> REGION_SHIFT; + final int maxRegionZ = maxChunkZ >> REGION_SHIFT; + + for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { + final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; + final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; + + for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { + final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); + + if (region == null) { + continue; + } + + final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; + final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; + + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); + if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { + continue; + } + + chunk.getEntities(except, box, into, predicate); + } + } + } + } + } + + public void getHardCollidingEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { + final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; + final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; + final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; + final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; + + final int minRegionX = minChunkX >> REGION_SHIFT; + final int minRegionZ = minChunkZ >> REGION_SHIFT; + final int maxRegionX = maxChunkX >> REGION_SHIFT; + final int maxRegionZ = maxChunkZ >> REGION_SHIFT; + + for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { + final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; + final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; + + for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { + final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); + + if (region == null) { + continue; + } + + final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; + final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; + + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); + if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { + continue; + } + + chunk.getHardCollidingEntities(except, box, into, predicate); + } + } + } + } + } + + public void getEntities(final EntityType type, final AABB box, final List into, + final Predicate predicate) { + final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; + final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; + final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; + final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; + + final int minRegionX = minChunkX >> REGION_SHIFT; + final int minRegionZ = minChunkZ >> REGION_SHIFT; + final int maxRegionX = maxChunkX >> REGION_SHIFT; + final int maxRegionZ = maxChunkZ >> REGION_SHIFT; + + for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { + final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; + final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; + + for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { + final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); + + if (region == null) { + continue; + } + + final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; + final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; + + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); + if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { + continue; + } + + chunk.getEntities(type, box, (List)into, (Predicate)predicate); + } + } + } + } + } + + public void getEntities(final Class clazz, final Entity except, final AABB box, final List into, + final Predicate predicate) { + final int minChunkX = (Mth.floor(box.minX) - 2) >> 4; + final int minChunkZ = (Mth.floor(box.minZ) - 2) >> 4; + final int maxChunkX = (Mth.floor(box.maxX) + 2) >> 4; + final int maxChunkZ = (Mth.floor(box.maxZ) + 2) >> 4; + + final int minRegionX = minChunkX >> REGION_SHIFT; + final int minRegionZ = minChunkZ >> REGION_SHIFT; + final int maxRegionX = maxChunkX >> REGION_SHIFT; + final int maxRegionZ = maxChunkZ >> REGION_SHIFT; + + for (int currRegionZ = minRegionZ; currRegionZ <= maxRegionZ; ++currRegionZ) { + final int minZ = currRegionZ == minRegionZ ? minChunkZ & REGION_MASK : 0; + final int maxZ = currRegionZ == maxRegionZ ? maxChunkZ & REGION_MASK : REGION_MASK; + + for (int currRegionX = minRegionX; currRegionX <= maxRegionX; ++currRegionX) { + final ChunkSlicesRegion region = this.getRegion(currRegionX, currRegionZ); + + if (region == null) { + continue; + } + + final int minX = currRegionX == minRegionX ? minChunkX & REGION_MASK : 0; + final int maxX = currRegionX == maxRegionX ? maxChunkX & REGION_MASK : REGION_MASK; + + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + final ChunkEntitySlices chunk = region.get(currX | (currZ << REGION_SHIFT)); + if (chunk == null || !chunk.status.isOrAfter(FullChunkStatus.FULL)) { + continue; + } + + chunk.getEntities(clazz, except, box, into, predicate); + } + } + } + } + } + + public void entitySectionLoad(final int chunkX, final int chunkZ, final ChunkEntitySlices slices) { + TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot load in entity section off-main"); + synchronized (this) { + final ChunkEntitySlices curr = this.getChunk(chunkX, chunkZ); + if (curr != null) { + this.removeChunk(chunkX, chunkZ); + + curr.mergeInto(slices); + + this.addChunk(chunkX, chunkZ, slices); + } else { + this.addChunk(chunkX, chunkZ, slices); + } + } + } + + public void entitySectionUnload(final int chunkX, final int chunkZ) { + TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot unload entity section off-main"); + this.removeChunk(chunkX, chunkZ); + } + + public ChunkEntitySlices getChunk(final int chunkX, final int chunkZ) { + final ChunkSlicesRegion region = this.getRegion(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); + if (region == null) { + return null; + } + + return region.get((chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT)); + } + + public ChunkEntitySlices getOrCreateChunk(final int chunkX, final int chunkZ) { + final ChunkSlicesRegion region = this.getRegion(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); + ChunkEntitySlices ret; + if (region == null || (ret = region.get((chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT))) == null) { + // loadInEntityChunk will call addChunk for us + return this.world.chunkTaskScheduler.chunkHolderManager.getOrCreateEntityChunk(chunkX, chunkZ, true); + } + + return ret; + } + + public ChunkSlicesRegion getRegion(final int regionX, final int regionZ) { + final long key = CoordinateUtils.getChunkKey(regionX, regionZ); + final long attempt = this.stateLock.tryOptimisticRead(); + if (attempt != 0L) { + try { + final ChunkSlicesRegion ret = this.regions.get(key); + + if (this.stateLock.validate(attempt)) { + return ret; + } + } catch (final Error error) { + throw error; + } catch (final Throwable thr) { + // ignore + } + } + + this.stateLock.readLock(); + try { + return this.regions.get(key); + } finally { + this.stateLock.tryUnlockRead(); + } + } + + private synchronized void removeChunk(final int chunkX, final int chunkZ) { + final long key = CoordinateUtils.getChunkKey(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); + final int relIndex = (chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT); + + final ChunkSlicesRegion region = this.regions.get(key); + final int remaining = region.remove(relIndex); + + if (remaining == 0) { + this.stateLock.writeLock(); + try { + this.regions.remove(key); + } finally { + this.stateLock.tryUnlockWrite(); + } + } + } + + public synchronized void addChunk(final int chunkX, final int chunkZ, final ChunkEntitySlices slices) { + final long key = CoordinateUtils.getChunkKey(chunkX >> REGION_SHIFT, chunkZ >> REGION_SHIFT); + final int relIndex = (chunkX & REGION_MASK) | ((chunkZ & REGION_MASK) << REGION_SHIFT); + + ChunkSlicesRegion region = this.regions.get(key); + if (region != null) { + region.add(relIndex, slices); + } else { + region = new ChunkSlicesRegion(); + region.add(relIndex, slices); + this.stateLock.writeLock(); + try { + this.regions.put(key, region); + } finally { + this.stateLock.tryUnlockWrite(); + } + } + } + + public static final class ChunkSlicesRegion { + + protected final ChunkEntitySlices[] slices = new ChunkEntitySlices[REGION_SIZE * REGION_SIZE]; + protected int sliceCount; + + public ChunkEntitySlices get(final int index) { + return this.slices[index]; + } + + public int remove(final int index) { + final ChunkEntitySlices slices = this.slices[index]; + if (slices == null) { + throw new IllegalStateException(); + } + + this.slices[index] = null; + + return --this.sliceCount; + } + + public void add(final int index, final ChunkEntitySlices slices) { + final ChunkEntitySlices curr = this.slices[index]; + if (curr != null) { + throw new IllegalStateException(); + } + + this.slices[index] = slices; + + ++this.sliceCount; + } + } + + private final class EntityCallback implements EntityInLevelCallback { + + public final Entity entity; + + public EntityCallback(final Entity entity) { + this.entity = entity; + } + + @Override + public void onMove() { + final Entity entity = this.entity; + final Visibility oldVisibility = getEntityStatus(entity); + final ChunkEntitySlices newSlices = EntityLookup.this.moveEntity(this.entity); + if (newSlices == null) { + // no new section, so didn't change sections + return; + } + final Visibility newVisibility = getEntityStatus(entity); + + EntityLookup.this.entityStatusChange(entity, newSlices, oldVisibility, newVisibility, true, false, false); + } + + @Override + public void onRemove(final Entity.RemovalReason reason) { + final Entity entity = this.entity; + TickThread.ensureTickThread(entity, "Cannot remove entity off-main"); // Paper - rewrite chunk system + final Visibility tickingState = EntityLookup.getEntityStatus(entity); + + EntityLookup.this.removeEntity(entity); + + EntityLookup.this.entityStatusChange(entity, null, tickingState, Visibility.HIDDEN, false, false, reason.shouldDestroy()); + + this.entity.setLevelCallback(NoOpCallback.INSTANCE); + } + } + + private static final class NoOpCallback implements EntityInLevelCallback { + + public static final NoOpCallback INSTANCE = new NoOpCallback(); + + @Override + public void onMove() {} + + @Override + public void onRemove(final Entity.RemovalReason reason) {} + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java new file mode 100644 index 0000000000000000000000000000000000000000..2934f0cf0ef09c84739312b00186c2ef0019a165 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java @@ -0,0 +1,1343 @@ +package io.papermc.paper.chunk.system.io; + +import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; +import ca.spottedleaf.concurrentutil.executor.Cancellable; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedQueueExecutorThread; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadedTaskQueue; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import com.mojang.logging.LogUtils; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import it.unimi.dsi.fastutil.HashCommon; +import net.minecraft.nbt.CompoundTag; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.storage.RegionFile; +import net.minecraft.world.level.chunk.storage.RegionFileStorage; +import org.slf4j.Logger; +import java.io.IOException; +import java.lang.invoke.VarHandle; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.CompletionException; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicInteger; +import java.util.function.BiConsumer; +import java.util.function.BiFunction; +import java.util.function.Consumer; +import java.util.function.Function; + +/** + * Prioritised RegionFile I/O executor, responsible for all RegionFile access. + *

+ * All functions provided are MT-Safe, however certain ordering constraints are recommended: + *

    + *
  • + * Chunk saves may not occur for unloaded chunks. + *
    • + *
  • + * Tasks must be scheduled on the chunk scheduler thread. + *
    • + *
+ * By following these constraints, no chunk data loss should occur with the exception of underlying I/O problems. + */ +public final class RegionFileIOThread extends PrioritisedQueueExecutorThread { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + /** + * The kinds of region files controlled by the region file thread. Add more when needed, and ensure + * getControllerFor is updated. + */ + public static enum RegionFileType { + CHUNK_DATA, + POI_DATA, + ENTITY_DATA; + } + + protected static final RegionFileType[] CACHED_REGIONFILE_TYPES = RegionFileType.values(); + + private ChunkDataController getControllerFor(final ServerLevel world, final RegionFileType type) { + return switch (type) { + case CHUNK_DATA -> world.chunkDataControllerNew; + case POI_DATA -> world.poiDataControllerNew; + case ENTITY_DATA -> world.entityDataControllerNew; + default -> throw new IllegalStateException("Unknown controller type " + type); + }; + } + + /** + * Collects regionfile data for a certain chunk. + */ + public static final class RegionFileData { + + private final boolean[] hasResult = new boolean[CACHED_REGIONFILE_TYPES.length]; + private final CompoundTag[] data = new CompoundTag[CACHED_REGIONFILE_TYPES.length]; + private final Throwable[] throwables = new Throwable[CACHED_REGIONFILE_TYPES.length]; + + /** + * Sets the result associated with the specified regionfile type. Note that + * results can only be set once per regionfile type. + * + * @param type The regionfile type. + * @param data The result to set. + */ + public void setData(final RegionFileType type, final CompoundTag data) { + final int index = type.ordinal(); + + if (this.hasResult[index]) { + throw new IllegalArgumentException("Result already exists for type " + type); + } + this.hasResult[index] = true; + this.data[index] = data; + } + + /** + * Sets the result associated with the specified regionfile type. Note that + * results can only be set once per regionfile type. + * + * @param type The regionfile type. + * @param throwable The result to set. + */ + public void setThrowable(final RegionFileType type, final Throwable throwable) { + final int index = type.ordinal(); + + if (this.hasResult[index]) { + throw new IllegalArgumentException("Result already exists for type " + type); + } + this.hasResult[index] = true; + this.throwables[index] = throwable; + } + + /** + * Returns whether there is a result for the specified regionfile type. + * + * @param type Specified regionfile type. + * + * @return Whether a result exists for {@code type}. + */ + public boolean hasResult(final RegionFileType type) { + return this.hasResult[type.ordinal()]; + } + + /** + * Returns the data result for the regionfile type. + * + * @param type Specified regionfile type. + * + * @throws IllegalArgumentException If the result has not been set for {@code type}. + * @return The data result for the specified type. If the result is a {@code Throwable}, + * then returns {@code null}. + */ + public CompoundTag getData(final RegionFileType type) { + final int index = type.ordinal(); + + if (!this.hasResult[index]) { + throw new IllegalArgumentException("Result does not exist for type " + type); + } + + return this.data[index]; + } + + /** + * Returns the throwable result for the regionfile type. + * + * @param type Specified regionfile type. + * + * @throws IllegalArgumentException If the result has not been set for {@code type}. + * @return The throwable result for the specified type. If the result is an {@code CompoundTag}, + * then returns {@code null}. + */ + public Throwable getThrowable(final RegionFileType type) { + final int index = type.ordinal(); + + if (!this.hasResult[index]) { + throw new IllegalArgumentException("Result does not exist for type " + type); + } + + return this.throwables[index]; + } + } + + private static final Object INIT_LOCK = new Object(); + + static RegionFileIOThread[] threads; + + /* needs to be consistent given a set of parameters */ + static RegionFileIOThread selectThread(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { + if (threads == null) { + throw new IllegalStateException("Threads not initialised"); + } + + final int regionX = chunkX >> 5; + final int regionZ = chunkZ >> 5; + final int typeOffset = type.ordinal(); + + return threads[(System.identityHashCode(world) + regionX + regionZ + typeOffset) % threads.length]; + } + + /** + * Shuts down the I/O executor(s). Watis for all tasks to complete if specified. + * Tasks queued during this call might not be accepted, and tasks queued after will not be accepted. + * + * @param wait Whether to wait until all tasks have completed. + */ + public static void close(final boolean wait) { + for (int i = 0, len = threads.length; i < len; ++i) { + threads[i].close(false, true); + } + if (wait) { + RegionFileIOThread.flush(); + } + } + + public static long[] getExecutedTasks() { + final long[] ret = new long[threads.length]; + for (int i = 0, len = threads.length; i < len; ++i) { + ret[i] = threads[i].getTotalTasksExecuted(); + } + + return ret; + } + + public static long[] getTasksScheduled() { + final long[] ret = new long[threads.length]; + for (int i = 0, len = threads.length; i < len; ++i) { + ret[i] = threads[i].getTotalTasksScheduled(); + } + return ret; + } + + public static void flush() { + for (int i = 0, len = threads.length; i < len; ++i) { + threads[i].waitUntilAllExecuted(); + } + } + + public static void partialFlush(final int totalTasksRemaining) { + long failures = 1L; // start out at 0.25ms + + for (;;) { + final long[] executed = getExecutedTasks(); + final long[] scheduled = getTasksScheduled(); + + long sum = 0; + for (int i = 0; i < executed.length; ++i) { + sum += scheduled[i] - executed[i]; + } + + if (sum <= totalTasksRemaining) { + break; + } + + failures = ConcurrentUtil.linearLongBackoff(failures, 250_000L, 5_000_000L); // 500us, 5ms + } + } + + /** + * Inits the executor with the specified number of threads. + * + * @param threads Specified number of threads. + */ + public static void init(final int threads) { + synchronized (INIT_LOCK) { + if (RegionFileIOThread.threads != null) { + throw new IllegalStateException("Already initialised threads"); + } + + RegionFileIOThread.threads = new RegionFileIOThread[threads]; + + for (int i = 0; i < threads; ++i) { + RegionFileIOThread.threads[i] = new RegionFileIOThread(i); + RegionFileIOThread.threads[i].start(); + } + } + } + + private RegionFileIOThread(final int threadNumber) { + super(new PrioritisedThreadedTaskQueue(), (int)(1.0e6)); // 1.0ms spinwait time + this.setName("RegionFile I/O Thread #" + threadNumber); + this.setPriority(Thread.NORM_PRIORITY - 2); // we keep priority close to normal because threads can wait on us + this.setUncaughtExceptionHandler((final Thread thread, final Throwable thr) -> { + LOGGER.error("Uncaught exception thrown from I/O thread, report this! Thread: " + thread.getName(), thr); + }); + } + + /** + * Returns whether the current thread is a regionfile I/O executor. + * @return Whether the current thread is a regionfile I/O executor. + */ + public static boolean isRegionFileThread() { + return Thread.currentThread() instanceof RegionFileIOThread; + } + + /** + * Returns the priority associated with blocking I/O based on the current thread. The goal is to avoid + * dumb plugins from taking away priority from threads we consider crucial. + * @return The priroity to use with blocking I/O on the current thread. + */ + public static PrioritisedExecutor.Priority getIOBlockingPriorityForCurrentThread() { + if (TickThread.isTickThread()) { + return PrioritisedExecutor.Priority.BLOCKING; + } + return PrioritisedExecutor.Priority.HIGHEST; + } + + /** + * Returns the current {@code CompoundTag} pending for write for the specified chunk and regionfile type. + * Note that this does not copy the result, so do not modify the result returned. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param type Specified regionfile type. + * + * @return The compound tag associated for the specified chunk. {@code null} if no write was pending, or if {@code null} is the write pending. + */ + public static CompoundTag getPendingWrite(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + return thread.getPendingWriteInternal(world, chunkX, chunkZ, type); + } + + CompoundTag getPendingWriteInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { + final ChunkDataController taskController = this.getControllerFor(world, type); + final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); + + if (task == null) { + return null; + } + + final CompoundTag ret = task.inProgressWrite; + + return ret == ChunkDataTask.NOTHING_TO_WRITE ? null : ret; + } + + /** + * Returns the priority for the specified regionfile type for the specified chunk. + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param type Specified regionfile type. + * @return The priority for the chunk + */ + public static PrioritisedExecutor.Priority getPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + return thread.getPriorityInternal(world, chunkX, chunkZ, type); + } + + PrioritisedExecutor.Priority getPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type) { + final ChunkDataController taskController = this.getControllerFor(world, type); + final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); + + if (task == null) { + return PrioritisedExecutor.Priority.COMPLETING; + } + + return task.prioritisedTask.getPriority(); + } + + /** + * Sets the priority for all regionfile types for the specified chunk. Note that great care should + * be taken using this method, as there can be multiple tasks tied to the same chunk that want different + * priorities. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param priority New priority. + * + * @see #raisePriority(ServerLevel, int, int, Priority) + * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) + * @see #lowerPriority(ServerLevel, int, int, Priority) + * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) + */ + public static void setPriority(final ServerLevel world, final int chunkX, final int chunkZ, + final PrioritisedExecutor.Priority priority) { + for (final RegionFileType type : CACHED_REGIONFILE_TYPES) { + RegionFileIOThread.setPriority(world, chunkX, chunkZ, type, priority); + } + } + + /** + * Sets the priority for the specified regionfile type for the specified chunk. Note that great care should + * be taken using this method, as there can be multiple tasks tied to the same chunk that want different + * priorities. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param type Specified regionfile type. + * @param priority New priority. + * + * @see #raisePriority(ServerLevel, int, int, Priority) + * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) + * @see #lowerPriority(ServerLevel, int, int, Priority) + * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) + */ + public static void setPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + thread.setPriorityInternal(world, chunkX, chunkZ, type, priority); + } + + void setPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) { + final ChunkDataController taskController = this.getControllerFor(world, type); + final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); + + if (task != null) { + task.prioritisedTask.setPriority(priority); + } + } + + /** + * Raises the priority for all regionfile types for the specified chunk. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param priority New priority. + * + * @see #setPriority(ServerLevel, int, int, Priority) + * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) + * @see #lowerPriority(ServerLevel, int, int, Priority) + * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) + */ + public static void raisePriority(final ServerLevel world, final int chunkX, final int chunkZ, + final PrioritisedExecutor.Priority priority) { + for (final RegionFileType type : CACHED_REGIONFILE_TYPES) { + RegionFileIOThread.raisePriority(world, chunkX, chunkZ, type, priority); + } + } + + /** + * Raises the priority for the specified regionfile type for the specified chunk. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param type Specified regionfile type. + * @param priority New priority. + * + * @see #setPriority(ServerLevel, int, int, Priority) + * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) + * @see #lowerPriority(ServerLevel, int, int, Priority) + * @see #lowerPriority(ServerLevel, int, int, RegionFileType, Priority) + */ + public static void raisePriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + thread.raisePriorityInternal(world, chunkX, chunkZ, type, priority); + } + + void raisePriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) { + final ChunkDataController taskController = this.getControllerFor(world, type); + final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); + + if (task != null) { + task.prioritisedTask.raisePriority(priority); + } + } + + /** + * Lowers the priority for all regionfile types for the specified chunk. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param priority New priority. + * + * @see #raisePriority(ServerLevel, int, int, Priority) + * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) + * @see #setPriority(ServerLevel, int, int, Priority) + * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) + */ + public static void lowerPriority(final ServerLevel world, final int chunkX, final int chunkZ, + final PrioritisedExecutor.Priority priority) { + for (final RegionFileType type : CACHED_REGIONFILE_TYPES) { + RegionFileIOThread.lowerPriority(world, chunkX, chunkZ, type, priority); + } + } + + /** + * Lowers the priority for the specified regionfile type for the specified chunk. + * + * @param world Specified world. + * @param chunkX Specified chunk x. + * @param chunkZ Specified chunk z. + * @param type Specified regionfile type. + * @param priority New priority. + * + * @see #raisePriority(ServerLevel, int, int, Priority) + * @see #raisePriority(ServerLevel, int, int, RegionFileType, Priority) + * @see #setPriority(ServerLevel, int, int, Priority) + * @see #setPriority(ServerLevel, int, int, RegionFileType, Priority) + */ + public static void lowerPriority(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + thread.lowerPriorityInternal(world, chunkX, chunkZ, type, priority); + } + + void lowerPriorityInternal(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) { + final ChunkDataController taskController = this.getControllerFor(world, type); + final ChunkDataTask task = taskController.tasks.get(Long.valueOf(CoordinateUtils.getChunkKey(chunkX, chunkZ))); + + if (task != null) { + task.prioritisedTask.lowerPriority(priority); + } + } + + /** + * Schedules the chunk data to be written asynchronously. + *

+ * Impl notes: + *

    + *
  • + * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means + * saves must be scheduled before a chunk is unloaded. + *
    • + *
  • + * Writes may be called concurrently, although only the "later" write will go through. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param data Chunk's data + * @param type The regionfile type to write to. + * + * @throws IllegalStateException If the file io thread has shutdown. + */ + public static void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data, + final RegionFileType type) { + RegionFileIOThread.scheduleSave(world, chunkX, chunkZ, data, type, PrioritisedExecutor.Priority.NORMAL); + } + + /** + * Schedules the chunk data to be written asynchronously. + *

+ * Impl notes: + *

    + *
  • + * This function presumes a chunk load for the coordinates is not called during this function (anytime after is OK). This means + * saves must be scheduled before a chunk is unloaded. + *
    • + *
  • + * Writes may be called concurrently, although only the "later" write will go through. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param data Chunk's data + * @param type The regionfile type to write to. + * @param priority The minimum priority to schedule at. + * + * @throws IllegalStateException If the file io thread has shutdown. + */ + public static void scheduleSave(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data, + final RegionFileType type, final PrioritisedExecutor.Priority priority) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + thread.scheduleSaveInternal(world, chunkX, chunkZ, data, type, priority); + } + + void scheduleSaveInternal(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data, + final RegionFileType type, final PrioritisedExecutor.Priority priority) { + final ChunkDataController taskController = this.getControllerFor(world, type); + + final boolean[] created = new boolean[1]; + final ChunkCoordinate key = new ChunkCoordinate(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + final ChunkDataTask task = taskController.tasks.compute(key, (final ChunkCoordinate keyInMap, final ChunkDataTask taskRunning) -> { + if (taskRunning == null || taskRunning.failedWrite) { + // no task is scheduled or the previous write failed - meaning we need to overwrite it + + // create task + final ChunkDataTask newTask = new ChunkDataTask(world, chunkX, chunkZ, taskController, RegionFileIOThread.this, priority); + newTask.inProgressWrite = data; + created[0] = true; + + return newTask; + } + + taskRunning.inProgressWrite = data; + + return taskRunning; + }); + + if (created[0]) { + task.prioritisedTask.queue(); + } else { + task.prioritisedTask.raisePriority(priority); + } + } + + /** + * Schedules a load to be executed asynchronously. This task will load all regionfile types, and then call + * {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)} + * for single load. + *

+ * Impl notes: + *

    + *
  • + * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may + * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of + * data is undefined behaviour, and can cause deadlock. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param onComplete Consumer to execute once this task has completed + * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost + * of this call. + * + * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. + * + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) + */ + public static Cancellable loadAllChunkData(final ServerLevel world, final int chunkX, final int chunkZ, + final Consumer onComplete, final boolean intendingToBlock) { + return RegionFileIOThread.loadAllChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL); + } + + /** + * Schedules a load to be executed asynchronously. This task will load all regionfile types, and then call + * {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)} + * for single load. + *

+ * Impl notes: + *

    + *
  • + * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may + * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of + * data is undefined behaviour, and can cause deadlock. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param onComplete Consumer to execute once this task has completed + * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost + * of this call. + * @param priority The minimum priority to load the data at. + * + * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. + * + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) + */ + public static Cancellable loadAllChunkData(final ServerLevel world, final int chunkX, final int chunkZ, + final Consumer onComplete, final boolean intendingToBlock, + final PrioritisedExecutor.Priority priority) { + return RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, priority, CACHED_REGIONFILE_TYPES); + } + + /** + * Schedules a load to be executed asynchronously. This task will load data for the specified regionfile type(s), and + * then call {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean)} + * for single load. + *

+ * Impl notes: + *

    + *
  • + * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may + * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of + * data is undefined behaviour, and can cause deadlock. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param onComplete Consumer to execute once this task has completed + * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost + * of this call. + * @param types The regionfile type(s) to load. + * + * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. + * + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) + */ + public static Cancellable loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ, + final Consumer onComplete, final boolean intendingToBlock, + final RegionFileType... types) { + return RegionFileIOThread.loadChunkData(world, chunkX, chunkZ, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL, types); + } + + /** + * Schedules a load to be executed asynchronously. This task will load data for the specified regionfile type(s), and + * then call {@code onComplete}. This is a bulk load operation, see {@link #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority)} + * for single load. + *

+ * Impl notes: + *

    + *
  • + * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may + * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of + * data is undefined behaviour, and can cause deadlock. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param onComplete Consumer to execute once this task has completed + * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost + * of this call. + * @param types The regionfile type(s) to load. + * @param priority The minimum priority to load the data at. + * + * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. + * + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean) + * @see #loadDataAsync(ServerLevel, int, int, RegionFileType, BiConsumer, boolean, Priority) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) + */ + public static Cancellable loadChunkData(final ServerLevel world, final int chunkX, final int chunkZ, + final Consumer onComplete, final boolean intendingToBlock, + final PrioritisedExecutor.Priority priority, final RegionFileType... types) { + if (types == null) { + throw new NullPointerException("Types cannot be null"); + } + if (types.length == 0) { + throw new IllegalArgumentException("Types cannot be empty"); + } + + final RegionFileData ret = new RegionFileData(); + + final Cancellable[] reads = new CancellableRead[types.length]; + final AtomicInteger completions = new AtomicInteger(); + final int expectedCompletions = types.length; + + for (int i = 0; i < expectedCompletions; ++i) { + final RegionFileType type = types[i]; + reads[i] = RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, + (final CompoundTag data, final Throwable throwable) -> { + if (throwable != null) { + ret.setThrowable(type, throwable); + } else { + ret.setData(type, data); + } + + if (completions.incrementAndGet() == expectedCompletions) { + onComplete.accept(ret); + } + }, intendingToBlock, priority); + } + + return new CancellableReads(reads); + } + + /** + * Schedules a load to be executed asynchronously. This task will load the specified regionfile type, and then call + * {@code onComplete}. + *

+ * Impl notes: + *

    + *
  • + * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may + * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of + * data is undefined behaviour, and can cause deadlock. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param onComplete Consumer to execute once this task has completed + * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost + * of this call. + * + * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. + * + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) + */ + public static Cancellable loadDataAsync(final ServerLevel world, final int chunkX, final int chunkZ, + final RegionFileType type, final BiConsumer onComplete, + final boolean intendingToBlock) { + return RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, onComplete, intendingToBlock, PrioritisedExecutor.Priority.NORMAL); + } + + /** + * Schedules a load to be executed asynchronously. This task will load the specified regionfile type, and then call + * {@code onComplete}. + *

+ * Impl notes: + *

    + *
  • + * The {@code onComplete} parameter may be completed during the execution of this function synchronously or it may + * be completed asynchronously on this file io thread. Interacting with the file IO thread in the completion of + * data is undefined behaviour, and can cause deadlock. + *
    • + *
+ * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param onComplete Consumer to execute once this task has completed + * @param intendingToBlock Whether the caller is intending to block on completion. This only affects the cost + * of this call. + * @param priority Minimum priority to load the data at. + * + * @return The {@link Cancellable} for this chunk load. Cancelling it will not affect other loads for the same chunk data. + * + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, RegionFileType...) + * @see #loadChunkData(ServerLevel, int, int, Consumer, boolean, Priority, RegionFileType...) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean) + * @see #loadAllChunkData(ServerLevel, int, int, Consumer, boolean, Priority) + */ + public static Cancellable loadDataAsync(final ServerLevel world, final int chunkX, final int chunkZ, + final RegionFileType type, final BiConsumer onComplete, + final boolean intendingToBlock, final PrioritisedExecutor.Priority priority) { + final RegionFileIOThread thread = RegionFileIOThread.selectThread(world, chunkX, chunkZ, type); + return thread.loadDataAsyncInternal(world, chunkX, chunkZ, type, onComplete, intendingToBlock, priority); + } + + private static Boolean doesRegionFileExist(final int chunkX, final int chunkZ, final boolean intendingToBlock, + final ChunkDataController taskController) { + final ChunkPos chunkPos = new ChunkPos(chunkX, chunkZ); + if (intendingToBlock) { + return taskController.computeForRegionFile(chunkX, chunkZ, true, (final RegionFile file) -> { + if (file == null) { // null if no regionfile exists + return Boolean.FALSE; + } + + return file.hasChunk(chunkPos) ? Boolean.TRUE : Boolean.FALSE; + }); + } else { + // first check if the region file for sure does not exist + if (taskController.doesRegionFileNotExist(chunkX, chunkZ)) { + return Boolean.FALSE; + } // else: it either exists or is not known, fall back to checking the loaded region file + + return taskController.computeForRegionFileIfLoaded(chunkX, chunkZ, (final RegionFile file) -> { + if (file == null) { // null if not loaded + // not sure at this point, let the I/O thread figure it out + return Boolean.TRUE; + } + + return file.hasChunk(chunkPos) ? Boolean.TRUE : Boolean.FALSE; + }); + } + } + + Cancellable loadDataAsyncInternal(final ServerLevel world, final int chunkX, final int chunkZ, + final RegionFileType type, final BiConsumer onComplete, + final boolean intendingToBlock, final PrioritisedExecutor.Priority priority) { + final ChunkDataController taskController = this.getControllerFor(world, type); + + final ImmediateCallbackCompletion callbackInfo = new ImmediateCallbackCompletion(); + + final ChunkCoordinate key = new ChunkCoordinate(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + final BiFunction compute = (final ChunkCoordinate keyInMap, final ChunkDataTask running) -> { + if (running == null) { + // not scheduled + + if (callbackInfo.regionFileCalculation == null) { + // caller will compute this outside of compute(), to avoid holding the bin lock + callbackInfo.needsRegionFileTest = true; + return null; + } + + if (callbackInfo.regionFileCalculation == Boolean.FALSE) { + // not on disk + callbackInfo.data = null; + callbackInfo.throwable = null; + callbackInfo.completeNow = true; + return null; + } + + // set up task + final ChunkDataTask newTask = new ChunkDataTask( + world, chunkX, chunkZ, taskController, RegionFileIOThread.this, priority + ); + newTask.inProgressRead = new RegionFileIOThread.InProgressRead(); + newTask.inProgressRead.waiters.add(onComplete); + + callbackInfo.tasksNeedsScheduling = true; + return newTask; + } + + final CompoundTag pendingWrite = running.inProgressWrite; + + if (pendingWrite == ChunkDataTask.NOTHING_TO_WRITE) { + // need to add to waiters here, because the regionfile thread will use compute() to lock and check for cancellations + if (!running.inProgressRead.addToWaiters(onComplete)) { + callbackInfo.data = running.inProgressRead.value; + callbackInfo.throwable = running.inProgressRead.throwable; + callbackInfo.completeNow = true; + } + return running; + } + // using the result sync here - don't bump priority + + // at this stage we have to use the in progress write's data to avoid an order issue + callbackInfo.data = pendingWrite; + callbackInfo.throwable = null; + callbackInfo.completeNow = true; + return running; + }; + + ChunkDataTask curr = taskController.tasks.get(key); + if (curr == null) { + callbackInfo.regionFileCalculation = doesRegionFileExist(chunkX, chunkZ, intendingToBlock, taskController); + } + ChunkDataTask ret = taskController.tasks.compute(key, compute); + if (callbackInfo.needsRegionFileTest) { + // curr isn't null but when we went into compute() it was + callbackInfo.regionFileCalculation = doesRegionFileExist(chunkX, chunkZ, intendingToBlock, taskController); + // now it should be fine + ret = taskController.tasks.compute(key, compute); + } + + // needs to be scheduled + if (callbackInfo.tasksNeedsScheduling) { + ret.prioritisedTask.queue(); + } else if (callbackInfo.completeNow) { + try { + onComplete.accept(callbackInfo.data, callbackInfo.throwable); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Callback " + ConcurrentUtil.genericToString(onComplete) + " synchronously failed to handle chunk data for task " + ret.toString(), thr); + } + } else { + // we're waiting on a task we didn't schedule, so raise its priority to what we want + ret.prioritisedTask.raisePriority(priority); + } + + return new CancellableRead(onComplete, ret); + } + + /** + * Schedules a load task to be executed asynchronously, and blocks on that task. + * + * @param world Chunk's world + * @param chunkX Chunk's x coordinate + * @param chunkZ Chunk's z coordinate + * @param type Regionfile type + * @param priority Minimum priority to load the data at. + * + * @return The chunk data for the chunk. Note that a {@code null} result means the chunk or regionfile does not exist on disk. + * + * @throws IOException If the load fails for any reason + */ + public static CompoundTag loadData(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileType type, + final PrioritisedExecutor.Priority priority) throws IOException { + final CompletableFuture ret = new CompletableFuture<>(); + + RegionFileIOThread.loadDataAsync(world, chunkX, chunkZ, type, (final CompoundTag compound, final Throwable thr) -> { + if (thr != null) { + ret.completeExceptionally(thr); + } else { + ret.complete(compound); + } + }, true, priority); + + try { + return ret.join(); + } catch (final CompletionException ex) { + throw new IOException(ex); + } + } + + private static final class ImmediateCallbackCompletion { + + public CompoundTag data; + public Throwable throwable; + public boolean completeNow; + public boolean tasksNeedsScheduling; + public boolean needsRegionFileTest; + public Boolean regionFileCalculation; + + } + + static final class CancellableRead implements Cancellable { + + private BiConsumer callback; + private RegionFileIOThread.ChunkDataTask task; + + CancellableRead(final BiConsumer callback, final RegionFileIOThread.ChunkDataTask task) { + this.callback = callback; + this.task = task; + } + + @Override + public boolean cancel() { + final BiConsumer callback = this.callback; + final RegionFileIOThread.ChunkDataTask task = this.task; + + if (callback == null || task == null) { + return false; + } + + this.callback = null; + this.task = null; + + final RegionFileIOThread.InProgressRead read = task.inProgressRead; + + // read can be null if no read was scheduled (i.e no regionfile existed or chunk in regionfile didn't) + return (read != null && read.waiters.remove(callback)); + } + } + + static final class CancellableReads implements Cancellable { + + private Cancellable[] reads; + + protected static final VarHandle READS_HANDLE = ConcurrentUtil.getVarHandle(CancellableReads.class, "reads", Cancellable[].class); + + CancellableReads(final Cancellable[] reads) { + this.reads = reads; + } + + @Override + public boolean cancel() { + final Cancellable[] reads = (Cancellable[])READS_HANDLE.getAndSet((CancellableReads)this, (Cancellable[])null); + + if (reads == null) { + return false; + } + + boolean ret = false; + + for (final Cancellable read : reads) { + ret |= read.cancel(); + } + + return ret; + } + } + + static final class InProgressRead { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + CompoundTag value; + Throwable throwable; + final MultiThreadedQueue> waiters = new MultiThreadedQueue<>(); + + // rets false if already completed (callback not invoked), true if callback was added + boolean addToWaiters(final BiConsumer callback) { + return this.waiters.add(callback); + } + + void complete(final RegionFileIOThread.ChunkDataTask task, final CompoundTag value, final Throwable throwable) { + this.value = value; + this.throwable = throwable; + + BiConsumer consumer; + while ((consumer = this.waiters.pollOrBlockAdds()) != null) { + try { + consumer.accept(value, throwable); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Callback " + ConcurrentUtil.genericToString(consumer) + " failed to handle chunk data for task " + task.toString(), thr); + } + } + } + } + + /** + * Class exists to replace {@link Long} usages as keys inside non-fastutil hashtables. The hash for some Long {@code x} + * is defined as {@code (x >>> 32) ^ x}. Chunk keys as long values are defined as {@code ((chunkX & 0xFFFFFFFFL) | (chunkZ << 32))}, + * which means the hashcode as a Long value will be {@code chunkX ^ chunkZ}. Given that most chunks are created within a radius arounds players, + * this will lead to many hash collisions. So, this class uses a better hashing algorithm so that usage of + * non-fastutil collections is not degraded. + */ + public static final class ChunkCoordinate implements Comparable { + + public final long key; + + public ChunkCoordinate(final long key) { + this.key = key; + } + + @Override + public int hashCode() { + return (int)HashCommon.mix(this.key); + } + + @Override + public boolean equals(final Object obj) { + if (this == obj) { + return true; + } + + if (!(obj instanceof ChunkCoordinate)) { + return false; + } + + final ChunkCoordinate other = (ChunkCoordinate)obj; + + return this.key == other.key; + } + + // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain + // is too large. So we should implement compareTo to help. + @Override + public int compareTo(final RegionFileIOThread.ChunkCoordinate other) { + return Long.compare(this.key, other.key); + } + + @Override + public String toString() { + return new ChunkPos(this.key).toString(); + } + } + + public static abstract class ChunkDataController { + + // ConcurrentHashMap synchronizes per chain, so reduce the chance of task's hashes colliding. + protected final ConcurrentHashMap tasks = new ConcurrentHashMap<>(8192, 0.10f); + + public final RegionFileType type; + + public ChunkDataController(final RegionFileType type) { + this.type = type; + } + + public abstract RegionFileStorage getCache(); + + public abstract void writeData(final int chunkX, final int chunkZ, final CompoundTag compound) throws IOException; + + public abstract CompoundTag readData(final int chunkX, final int chunkZ) throws IOException; + + public boolean hasTasks() { + return !this.tasks.isEmpty(); + } + + public boolean doesRegionFileNotExist(final int chunkX, final int chunkZ) { + return this.getCache().doesRegionFileNotExistNoIO(new ChunkPos(chunkX, chunkZ)); + } + + public T computeForRegionFile(final int chunkX, final int chunkZ, final boolean existingOnly, final Function function) { + final RegionFileStorage cache = this.getCache(); + final RegionFile regionFile; + synchronized (cache) { + try { + regionFile = cache.getRegionFile(new ChunkPos(chunkX, chunkZ), existingOnly, true); + } catch (final IOException ex) { + throw new RuntimeException(ex); + } + } + + try { + return function.apply(regionFile); + } finally { + if (regionFile != null) { + regionFile.fileLock.unlock(); + } + } + } + + public T computeForRegionFileIfLoaded(final int chunkX, final int chunkZ, final Function function) { + final RegionFileStorage cache = this.getCache(); + final RegionFile regionFile; + + synchronized (cache) { + regionFile = cache.getRegionFileIfLoaded(new ChunkPos(chunkX, chunkZ)); + if (regionFile != null) { + regionFile.fileLock.lock(); + } + } + + try { + return function.apply(regionFile); + } finally { + if (regionFile != null) { + regionFile.fileLock.unlock(); + } + } + } + } + + static final class ChunkDataTask implements Runnable { + + protected static final CompoundTag NOTHING_TO_WRITE = new CompoundTag(); + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + RegionFileIOThread.InProgressRead inProgressRead; + volatile CompoundTag inProgressWrite = NOTHING_TO_WRITE; // only needs to be acquire/release + + boolean failedWrite; + + final ServerLevel world; + final int chunkX; + final int chunkZ; + final RegionFileIOThread.ChunkDataController taskController; + + final PrioritisedExecutor.PrioritisedTask prioritisedTask; + + /* + * IO thread will perform reads before writes for a given chunk x and z + * + * How reads/writes are scheduled: + * + * If read is scheduled while scheduling write, take no special action and just schedule write + * If read is scheduled while scheduling read and no write is scheduled, chain the read task + * + * + * If write is scheduled while scheduling read, use the pending write data and ret immediately (so no read is scheduled) + * If write is scheduled while scheduling write (ignore read in progress), overwrite the write in progress data + * + * This allows the reads and writes to act as if they occur synchronously to the thread scheduling them, however + * it fails to properly propagate write failures thanks to writes overwriting each other + */ + + public ChunkDataTask(final ServerLevel world, final int chunkX, final int chunkZ, final RegionFileIOThread.ChunkDataController taskController, + final PrioritisedExecutor executor, final PrioritisedExecutor.Priority priority) { + this.world = world; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.taskController = taskController; + this.prioritisedTask = executor.createTask(this, priority); + } + + @Override + public String toString() { + return "Task for world: '" + this.world.getWorld().getName() + "' at (" + this.chunkX + "," + this.chunkZ + + ") type: " + this.taskController.type.name() + ", hash: " + this.hashCode(); + } + + @Override + public void run() { + final RegionFileIOThread.InProgressRead read = this.inProgressRead; + final ChunkCoordinate chunkKey = new ChunkCoordinate(CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ)); + + if (read != null) { + final boolean[] canRead = new boolean[] { true }; + + if (read.waiters.isEmpty()) { + // cancelled read? go to task controller to confirm + final ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> { + if (valueInMap == null) { + throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!"); + } + if (valueInMap != ChunkDataTask.this) { + throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!"); + } + + if (!read.waiters.isEmpty()) { // as per usual IntelliJ is unable to figure out that there are concurrent accesses. + return valueInMap; + } else { + canRead[0] = false; + } + + return valueInMap.inProgressWrite == NOTHING_TO_WRITE ? null : valueInMap; + }); + + if (inMap == null) { + // read is cancelled - and no write pending, so we're done + return; + } + // if there is a write in progress, we don't actually have to worry about waiters gaining new entries - + // the readers will just use the in progress write, so the value in canRead is good to use without + // further synchronisation. + } + + if (canRead[0]) { + CompoundTag compound = null; + Throwable throwable = null; + + try { + compound = this.taskController.readData(this.chunkX, this.chunkZ); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + throwable = thr; + LOGGER.error("Failed to read chunk data for task: " + this.toString(), thr); + } + read.complete(this, compound, throwable); + } + } + + CompoundTag write = this.inProgressWrite; + + if (write == NOTHING_TO_WRITE) { + final ChunkDataTask inMap = this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> { + if (valueInMap == null) { + throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!"); + } + if (valueInMap != ChunkDataTask.this) { + throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!"); + } + return valueInMap.inProgressWrite == NOTHING_TO_WRITE ? null : valueInMap; + }); + + if (inMap == null) { + return; // set the task value to null, indicating we're done + } // else: inProgressWrite changed, so now we have something to write + } + + for (;;) { + write = this.inProgressWrite; + final CompoundTag dataWritten = write; + + boolean failedWrite = false; + + try { + this.taskController.writeData(this.chunkX, this.chunkZ, write); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + if (thr instanceof RegionFileStorage.RegionFileSizeException) { + final int maxSize = RegionFile.MAX_CHUNK_SIZE / (1024 * 1024); + LOGGER.error("Chunk at (" + this.chunkX + "," + this.chunkZ + ") in '" + this.world.getWorld().getName() + "' exceeds max size of " + maxSize + "MiB, it has been deleted from disk."); + } else { + failedWrite = thr instanceof IOException; + LOGGER.error("Failed to write chunk data for task: " + this.toString(), thr); + } + } + + final boolean finalFailWrite = failedWrite; + final boolean[] done = new boolean[] { false }; + + this.taskController.tasks.compute(chunkKey, (final ChunkCoordinate keyInMap, final ChunkDataTask valueInMap) -> { + if (valueInMap == null) { + throw new IllegalStateException("Write completed concurrently, expected this task: " + ChunkDataTask.this.toString() + ", report this!"); + } + if (valueInMap != ChunkDataTask.this) { + throw new IllegalStateException("Chunk task mismatch, expected this task: " + ChunkDataTask.this.toString() + ", got: " + valueInMap.toString() + ", report this!"); + } + if (valueInMap.inProgressWrite == dataWritten) { + valueInMap.failedWrite = finalFailWrite; + done[0] = true; + // keep the data in map if we failed the write so we can try to prevent data loss + return finalFailWrite ? valueInMap : null; + } + // different data than expected, means we need to retry write + return valueInMap; + }); + + if (done[0]) { + return; + } + + // fetch & write new data + continue; + } + } + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java b/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java new file mode 100644 index 0000000000000000000000000000000000000000..69e9944358951bd69ff5e8b3482da1a5e4476209 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/light/LightQueue.java @@ -0,0 +1,283 @@ +package io.papermc.paper.chunk.system.light; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.starlight.common.light.BlockStarLightEngine; +import ca.spottedleaf.starlight.common.light.SkyStarLightEngine; +import ca.spottedleaf.starlight.common.light.StarLightInterface; +import io.papermc.paper.util.CoordinateUtils; +import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; +import it.unimi.dsi.fastutil.shorts.ShortCollection; +import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet; +import net.minecraft.core.BlockPos; +import net.minecraft.core.SectionPos; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import java.util.ArrayList; +import java.util.HashSet; +import java.util.List; +import java.util.Set; +import java.util.concurrent.CompletableFuture; +import java.util.function.BooleanSupplier; + +public final class LightQueue { + + protected final Long2ObjectOpenHashMap chunkTasks = new Long2ObjectOpenHashMap<>(); + protected final StarLightInterface manager; + protected final ServerLevel world; + + public LightQueue(final StarLightInterface manager) { + this.manager = manager; + this.world = ((ServerLevel)manager.getWorld()); + } + + public void lowerPriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) { + final ChunkTasks task; + synchronized (this) { + task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + if (task != null) { + task.lowerPriority(priority); + } + } + + public void setPriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) { + final ChunkTasks task; + synchronized (this) { + task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + if (task != null) { + task.setPriority(priority); + } + } + + public void raisePriority(final int chunkX, final int chunkZ, final PrioritisedExecutor.Priority priority) { + final ChunkTasks task; + synchronized (this) { + task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + if (task != null) { + task.raisePriority(priority); + } + } + + public PrioritisedExecutor.Priority getPriority(final int chunkX, final int chunkZ) { + final ChunkTasks task; + synchronized (this) { + task = this.chunkTasks.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + if (task != null) { + return task.getPriority(); + } + + return PrioritisedExecutor.Priority.COMPLETING; + } + + public boolean isEmpty() { + synchronized (this) { + return this.chunkTasks.isEmpty(); + } + } + + public ChunkTasks queueBlockChange(final BlockPos pos) { + final ChunkTasks tasks; + synchronized (this) { + tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { + return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); + }); + tasks.changedPositions.add(pos.immutable()); + } + + tasks.schedule(); + + return tasks; + } + + public ChunkTasks queueSectionChange(final SectionPos pos, final boolean newEmptyValue) { + final ChunkTasks tasks; + synchronized (this) { + tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { + return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); + }); + + if (tasks.changedSectionSet == null) { + tasks.changedSectionSet = new Boolean[this.manager.maxSection - this.manager.minSection + 1]; + } + tasks.changedSectionSet[pos.getY() - this.manager.minSection] = Boolean.valueOf(newEmptyValue); + } + + tasks.schedule(); + + return tasks; + } + + public ChunkTasks queueChunkLightTask(final ChunkPos pos, final BooleanSupplier lightTask, final PrioritisedExecutor.Priority priority) { + final ChunkTasks tasks; + synchronized (this) { + tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { + return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this, priority); + }); + if (tasks.lightTasks == null) { + tasks.lightTasks = new ArrayList<>(); + } + tasks.lightTasks.add(lightTask); + } + + tasks.schedule(); + + return tasks; + } + + public ChunkTasks queueChunkSkylightEdgeCheck(final SectionPos pos, final ShortCollection sections) { + final ChunkTasks tasks; + synchronized (this) { + tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { + return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); + }); + + ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksSky; + if (queuedEdges == null) { + queuedEdges = tasks.queuedEdgeChecksSky = new ShortOpenHashSet(); + } + queuedEdges.addAll(sections); + } + + tasks.schedule(); + + return tasks; + } + + public ChunkTasks queueChunkBlocklightEdgeCheck(final SectionPos pos, final ShortCollection sections) { + final ChunkTasks tasks; + + synchronized (this) { + tasks = this.chunkTasks.computeIfAbsent(CoordinateUtils.getChunkKey(pos), (final long keyInMap) -> { + return new ChunkTasks(keyInMap, LightQueue.this.manager, LightQueue.this); + }); + + ShortOpenHashSet queuedEdges = tasks.queuedEdgeChecksBlock; + if (queuedEdges == null) { + queuedEdges = tasks.queuedEdgeChecksBlock = new ShortOpenHashSet(); + } + queuedEdges.addAll(sections); + } + + tasks.schedule(); + + return tasks; + } + + public void removeChunk(final ChunkPos pos) { + final ChunkTasks tasks; + synchronized (this) { + tasks = this.chunkTasks.remove(CoordinateUtils.getChunkKey(pos)); + } + if (tasks != null && tasks.cancel()) { + tasks.onComplete.complete(null); + } + } + + public static final class ChunkTasks implements Runnable { + + public final CompletableFuture onComplete = new CompletableFuture<>(); + public boolean isTicketAdded; + public final long chunkCoordinate; + + private final StarLightInterface lightEngine; + private final LightQueue queue; + private final PrioritisedExecutor.PrioritisedTask task; + private final Set changedPositions = new HashSet<>(); + private Boolean[] changedSectionSet; + private ShortOpenHashSet queuedEdgeChecksSky; + private ShortOpenHashSet queuedEdgeChecksBlock; + private List lightTasks; + + public ChunkTasks(final long chunkCoordinate, final StarLightInterface lightEngine, final LightQueue queue) { + this(chunkCoordinate, lightEngine, queue, PrioritisedExecutor.Priority.NORMAL); + } + + public ChunkTasks(final long chunkCoordinate, final StarLightInterface lightEngine, final LightQueue queue, + final PrioritisedExecutor.Priority priority) { + this.chunkCoordinate = chunkCoordinate; + this.lightEngine = lightEngine; + this.queue = queue; + this.task = queue.world.chunkTaskScheduler.radiusAwareScheduler.createTask( + CoordinateUtils.getChunkX(chunkCoordinate), CoordinateUtils.getChunkZ(chunkCoordinate), + ChunkStatus.LIGHT.writeRadius, this, priority + ); + } + + public void schedule() { + this.task.queue(); + } + + public boolean cancel() { + return this.task.cancel(); + } + + public PrioritisedExecutor.Priority getPriority() { + return this.task.getPriority(); + } + + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + this.task.lowerPriority(priority); + } + + public void setPriority(final PrioritisedExecutor.Priority priority) { + this.task.setPriority(priority); + } + + public void raisePriority(final PrioritisedExecutor.Priority priority) { + this.task.raisePriority(priority); + } + + @Override + public void run() { + synchronized (this.queue) { + this.queue.chunkTasks.remove(this.chunkCoordinate); + } + + boolean litChunk = false; + if (this.lightTasks != null) { + for (final BooleanSupplier run : this.lightTasks) { + if (run.getAsBoolean()) { + litChunk = true; + break; + } + } + } + + final SkyStarLightEngine skyEngine = this.lightEngine.getSkyLightEngine(); + final BlockStarLightEngine blockEngine = this.lightEngine.getBlockLightEngine(); + try { + final long coordinate = this.chunkCoordinate; + final int chunkX = CoordinateUtils.getChunkX(coordinate); + final int chunkZ = CoordinateUtils.getChunkZ(coordinate); + + final Set positions = this.changedPositions; + final Boolean[] sectionChanges = this.changedSectionSet; + + if (!litChunk) { + if (skyEngine != null && (!positions.isEmpty() || sectionChanges != null)) { + skyEngine.blocksChangedInChunk(this.lightEngine.getLightAccess(), chunkX, chunkZ, positions, sectionChanges); + } + if (blockEngine != null && (!positions.isEmpty() || sectionChanges != null)) { + blockEngine.blocksChangedInChunk(this.lightEngine.getLightAccess(), chunkX, chunkZ, positions, sectionChanges); + } + + if (skyEngine != null && this.queuedEdgeChecksSky != null) { + skyEngine.checkChunkEdges(this.lightEngine.getLightAccess(), chunkX, chunkZ, this.queuedEdgeChecksSky); + } + if (blockEngine != null && this.queuedEdgeChecksBlock != null) { + blockEngine.checkChunkEdges(this.lightEngine.getLightAccess(), chunkX, chunkZ, this.queuedEdgeChecksBlock); + } + } + + this.onComplete.complete(null); + } finally { + this.lightEngine.releaseSkyLightEngine(skyEngine); + this.lightEngine.releaseBlockLightEngine(blockEngine); + } + } + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java b/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java new file mode 100644 index 0000000000000000000000000000000000000000..d72041aa814ff179e6e29a45dcd359a91d426d47 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/poi/PoiChunk.java @@ -0,0 +1,213 @@ +package io.papermc.paper.chunk.system.poi; + +import com.mojang.logging.LogUtils; +import com.mojang.serialization.Codec; +import com.mojang.serialization.DataResult; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import io.papermc.paper.util.WorldUtil; +import net.minecraft.SharedConstants; +import net.minecraft.nbt.CompoundTag; +import net.minecraft.nbt.NbtOps; +import net.minecraft.nbt.Tag; +import net.minecraft.resources.RegistryOps; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.entity.ai.village.poi.PoiManager; +import net.minecraft.world.entity.ai.village.poi.PoiSection; +import org.slf4j.Logger; + +import java.util.Optional; + +public final class PoiChunk { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + public final ServerLevel world; + public final int chunkX; + public final int chunkZ; + public final int minSection; + public final int maxSection; + + protected final PoiSection[] sections; + + private boolean isDirty; + private boolean loaded; + + public PoiChunk(final ServerLevel world, final int chunkX, final int chunkZ, final int minSection, final int maxSection) { + this(world, chunkX, chunkZ, minSection, maxSection, new PoiSection[maxSection - minSection + 1]); + } + + public PoiChunk(final ServerLevel world, final int chunkX, final int chunkZ, final int minSection, final int maxSection, final PoiSection[] sections) { + this.world = world; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.minSection = minSection; + this.maxSection = maxSection; + this.sections = sections; + if (this.sections.length != (maxSection - minSection + 1)) { + throw new IllegalStateException("Incorrect length used, expected " + (maxSection - minSection + 1) + ", got " + this.sections.length); + } + } + + public void load() { + TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Loading in poi chunk off-main"); + if (this.loaded) { + return; + } + this.loaded = true; + this.world.chunkSource.getPoiManager().loadInPoiChunk(this); + } + + public boolean isLoaded() { + return this.loaded; + } + + public boolean isEmpty() { + for (final PoiSection section : this.sections) { + if (section != null && !section.isEmpty()) { + return false; + } + } + + return true; + } + + public PoiSection getOrCreateSection(final int chunkY) { + if (chunkY >= this.minSection && chunkY <= this.maxSection) { + final int idx = chunkY - this.minSection; + final PoiSection ret = this.sections[idx]; + if (ret != null) { + return ret; + } + + final PoiManager poiManager = this.world.getPoiManager(); + final long key = CoordinateUtils.getChunkSectionKey(this.chunkX, chunkY, this.chunkZ); + + return this.sections[idx] = new PoiSection(() -> { + poiManager.setDirty(key); + }); + } + throw new IllegalArgumentException("chunkY is out of bounds, chunkY: " + chunkY + " outside [" + this.minSection + "," + this.maxSection + "]"); + } + + public PoiSection getSection(final int chunkY) { + if (chunkY >= this.minSection && chunkY <= this.maxSection) { + return this.sections[chunkY - this.minSection]; + } + return null; + } + + public Optional getSectionForVanilla(final int chunkY) { + if (chunkY >= this.minSection && chunkY <= this.maxSection) { + final PoiSection ret = this.sections[chunkY - this.minSection]; + return ret == null ? Optional.empty() : ret.noAllocateOptional; + } + return Optional.empty(); + } + + public boolean isDirty() { + return this.isDirty; + } + + public void setDirty(final boolean dirty) { + this.isDirty = dirty; + } + + // returns null if empty + public CompoundTag save() { + final RegistryOps registryOps = RegistryOps.create(NbtOps.INSTANCE, world.getPoiManager().registryAccess); + + final CompoundTag ret = new CompoundTag(); + final CompoundTag sections = new CompoundTag(); + ret.put("Sections", sections); + + ret.putInt("DataVersion", SharedConstants.getCurrentVersion().getDataVersion().getVersion()); + + final ServerLevel world = this.world; + final PoiManager poiManager = world.getPoiManager(); + final int chunkX = this.chunkX; + final int chunkZ = this.chunkZ; + + for (int sectionY = this.minSection; sectionY <= this.maxSection; ++sectionY) { + final PoiSection chunk = this.sections[sectionY - this.minSection]; + if (chunk == null || chunk.isEmpty()) { + continue; + } + + final long key = CoordinateUtils.getChunkSectionKey(chunkX, sectionY, chunkZ); + // codecs are honestly such a fucking disaster. What the fuck is this trash? + final Codec codec = PoiSection.codec(() -> { + poiManager.setDirty(key); + }); + + final DataResult serializedResult = codec.encodeStart(registryOps, chunk); + final int finalSectionY = sectionY; + final Tag serialized = serializedResult.resultOrPartial((final String description) -> { + LOGGER.error("Failed to serialize poi chunk for world: " + world.getWorld().getName() + ", chunk: (" + chunkX + "," + finalSectionY + "," + chunkZ + "); description: " + description); + }).orElse(null); + if (serialized == null) { + // failed, should be logged from the resultOrPartial + continue; + } + + sections.put(Integer.toString(sectionY), serialized); + } + + return sections.isEmpty() ? null : ret; + } + + public static PoiChunk empty(final ServerLevel world, final int chunkX, final int chunkZ) { + final PoiChunk ret = new PoiChunk(world, chunkX, chunkZ, WorldUtil.getMinSection(world), WorldUtil.getMaxSection(world)); + ret.loaded = true; + return ret; + } + + public static PoiChunk parse(final ServerLevel world, final int chunkX, final int chunkZ, final CompoundTag data) { + final PoiChunk ret = empty(world, chunkX, chunkZ); + + final RegistryOps registryOps = RegistryOps.create(NbtOps.INSTANCE, world.getPoiManager().registryAccess); + + final CompoundTag sections = data.getCompound("Sections"); + + if (sections.isEmpty()) { + // nothing to parse + return ret; + } + + final PoiManager poiManager = world.getPoiManager(); + + boolean readAnything = false; + + for (int sectionY = ret.minSection; sectionY <= ret.maxSection; ++sectionY) { + final String key = Integer.toString(sectionY); + if (!sections.contains(key)) { + continue; + } + + final long coordinateKey = CoordinateUtils.getChunkSectionKey(chunkX, sectionY, chunkZ); + // codecs are honestly such a fucking disaster. What the fuck is this trash? + final Codec codec = PoiSection.codec(() -> { + poiManager.setDirty(coordinateKey); + }); + + final CompoundTag section = sections.getCompound(key); + final DataResult deserializeResult = codec.parse(registryOps, section); + final int finalSectionY = sectionY; + final PoiSection deserialized = deserializeResult.resultOrPartial((final String description) -> { + LOGGER.error("Failed to deserialize poi chunk for world: " + world.getWorld().getName() + ", chunk: (" + chunkX + "," + finalSectionY + "," + chunkZ + "); description: " + description); + }).orElse(null); + + if (deserialized == null || deserialized.isEmpty()) { + // completely empty, no point in storing this + continue; + } + + readAnything = true; + ret.sections[sectionY - ret.minSection] = deserialized; + } + + ret.loaded = !readAnything; // Set loaded to false if we read anything to ensure proper callbacks to PoiManager are made on #load + + return ret; + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java new file mode 100644 index 0000000000000000000000000000000000000000..c307b084f59f7bb94dc02f25bbcd3e01e01d2306 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkFullTask.java @@ -0,0 +1,131 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import com.mojang.logging.LogUtils; +import io.papermc.paper.chunk.system.poi.PoiChunk; +import net.minecraft.server.level.ChunkMap; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.ImposterProtoChunk; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.chunk.ProtoChunk; +import org.slf4j.Logger; +import java.lang.invoke.VarHandle; + +public final class ChunkFullTask extends ChunkProgressionTask implements Runnable { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + protected final NewChunkHolder chunkHolder; + protected final ChunkAccess fromChunk; + protected final PrioritisedExecutor.PrioritisedTask convertToFullTask; + + public ChunkFullTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ, + final NewChunkHolder chunkHolder, final ChunkAccess fromChunk, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ); + this.chunkHolder = chunkHolder; + this.fromChunk = fromChunk; + this.convertToFullTask = scheduler.createChunkTask(chunkX, chunkZ, this, priority); + } + + @Override + public ChunkStatus getTargetStatus() { + return ChunkStatus.FULL; + } + + @Override + public void run() { + // See Vanilla protoChunkToFullChunk for what this function should be doing + final LevelChunk chunk; + try { + // moved from the load from nbt stage into here + final PoiChunk poiChunk = this.chunkHolder.getPoiChunk(); + if (poiChunk == null) { + LOGGER.error("Expected poi chunk to be loaded with chunk for task " + this.toString()); + } else { + poiChunk.load(); + this.world.getPoiManager().checkConsistency(this.fromChunk); + } + + if (this.fromChunk instanceof ImposterProtoChunk wrappedFull) { + chunk = wrappedFull.getWrapped(); + } else { + final ServerLevel world = this.world; + final ProtoChunk protoChunk = (ProtoChunk)this.fromChunk; + chunk = new LevelChunk(this.world, protoChunk, (final LevelChunk unused) -> { + ChunkMap.postLoadProtoChunk(world, protoChunk.getEntities(), protoChunk.getPos()); // Paper - rewrite chunk system + }); + } + + chunk.setChunkHolder(this.scheduler.chunkHolderManager.getChunkHolder(this.chunkX, this.chunkZ)); // replaces setFullStatus + chunk.runPostLoad(); + // Unlike Vanilla, we load the entity chunk here, as we load the NBT in empty status (unlike Vanilla) + // This brings entity addition back in line with older versions of the game + // Since we load the NBT in the empty status, this will never block for I/O + this.world.chunkTaskScheduler.chunkHolderManager.getOrCreateEntityChunk(this.chunkX, this.chunkZ, false); + + // we don't need the entitiesInLevel trash, this system doesn't double run callbacks + chunk.setLoaded(true); + chunk.registerAllBlockEntitiesAfterLevelLoad(); + chunk.registerTickContainerInLevel(this.world); + } catch (final Throwable throwable) { + this.complete(null, throwable); + return; + } + this.complete(chunk, null); + } + + protected volatile boolean scheduled; + protected static final VarHandle SCHEDULED_HANDLE = ConcurrentUtil.getVarHandle(ChunkFullTask.class, "scheduled", boolean.class); + + @Override + public boolean isScheduled() { + return this.scheduled; + } + + @Override + public void schedule() { + if ((boolean)SCHEDULED_HANDLE.getAndSet((ChunkFullTask)this, true)) { + throw new IllegalStateException("Cannot double call schedule()"); + } + this.convertToFullTask.queue(); + } + + @Override + public void cancel() { + if (this.convertToFullTask.cancel()) { + this.complete(null, null); + } + } + + @Override + public PrioritisedExecutor.Priority getPriority() { + return this.convertToFullTask.getPriority(); + } + + @Override + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.convertToFullTask.lowerPriority(priority); + } + + @Override + public void setPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.convertToFullTask.setPriority(priority); + } + + @Override + public void raisePriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.convertToFullTask.raisePriority(priority); + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java new file mode 100644 index 0000000000000000000000000000000000000000..5b446e6ac151f99f64f0c442d0b40b5e251bc4c4 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkHolderManager.java @@ -0,0 +1,1500 @@ +package io.papermc.paper.chunk.system.scheduling; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; +import ca.spottedleaf.concurrentutil.map.SWMRLong2ObjectHashTable; +import com.google.common.collect.ImmutableList; +import com.google.gson.JsonArray; +import com.google.gson.JsonObject; +import com.mojang.logging.LogUtils; +import io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader; +import io.papermc.paper.chunk.system.io.RegionFileIOThread; +import io.papermc.paper.chunk.system.poi.PoiChunk; +import io.papermc.paper.threadedregions.TickRegions; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import io.papermc.paper.world.ChunkEntitySlices; +import it.unimi.dsi.fastutil.longs.Long2ByteLinkedOpenHashMap; +import it.unimi.dsi.fastutil.longs.Long2ByteMap; +import it.unimi.dsi.fastutil.longs.Long2IntLinkedOpenHashMap; +import it.unimi.dsi.fastutil.longs.Long2IntMap; +import it.unimi.dsi.fastutil.longs.Long2IntOpenHashMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; +import it.unimi.dsi.fastutil.longs.LongArrayList; +import it.unimi.dsi.fastutil.longs.LongIterator; +import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet; +import net.minecraft.nbt.CompoundTag; +import io.papermc.paper.chunk.system.ChunkSystem; +import net.minecraft.server.MinecraftServer; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.ChunkLevel; +import net.minecraft.server.level.FullChunkStatus; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.Ticket; +import net.minecraft.server.level.TicketType; +import net.minecraft.util.SortedArraySet; +import net.minecraft.util.Unit; +import net.minecraft.world.level.ChunkPos; +import org.bukkit.plugin.Plugin; +import org.slf4j.Logger; +import java.io.IOException; +import java.text.DecimalFormat; +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.Iterator; +import java.util.List; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; +import java.util.concurrent.atomic.AtomicReference; +import java.util.concurrent.locks.LockSupport; +import java.util.function.Predicate; + +public final class ChunkHolderManager { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + public static final int FULL_LOADED_TICKET_LEVEL = 33; + public static final int BLOCK_TICKING_TICKET_LEVEL = 32; + public static final int ENTITY_TICKING_TICKET_LEVEL = 31; + public static final int MAX_TICKET_LEVEL = ChunkLevel.MAX_LEVEL; // inclusive + + private static final long NO_TIMEOUT_MARKER = Long.MIN_VALUE; + private static final long PROBE_MARKER = Long.MIN_VALUE + 1; + public final ReentrantAreaLock ticketLockArea; + + private final ConcurrentHashMap>> tickets = new java.util.concurrent.ConcurrentHashMap<>(); + private final ConcurrentHashMap sectionToChunkToExpireCount = new java.util.concurrent.ConcurrentHashMap<>(); + final ChunkQueue unloadQueue; + + public boolean processTicketUpdates(final int posX, final int posZ) { + final int ticketShift = ThreadedTicketLevelPropagator.SECTION_SHIFT; + final int ticketMask = (1 << ticketShift) - 1; + final List scheduledTasks = new ArrayList<>(); + final List changedFullStatus = new ArrayList<>(); + final boolean ret; + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( + ((posX >> ticketShift) - 1) << ticketShift, + ((posZ >> ticketShift) - 1) << ticketShift, + (((posX >> ticketShift) + 1) << ticketShift) | ticketMask, + (((posZ >> ticketShift) + 1) << ticketShift) | ticketMask + ); + try { + ret = this.processTicketUpdatesNoLock(posX >> ticketShift, posZ >> ticketShift, scheduledTasks, changedFullStatus); + } finally { + this.ticketLockArea.unlock(ticketLock); + } + + this.addChangedStatuses(changedFullStatus); + + for (int i = 0, len = scheduledTasks.size(); i < len; ++i) { + scheduledTasks.get(i).schedule(); + } + + return ret; + } + + private boolean processTicketUpdatesNoLock(final int sectionX, final int sectionZ, final List scheduledTasks, + final List changedFullStatus) { + return this.ticketLevelPropagator.performUpdate( + sectionX, sectionZ, this.taskScheduler.schedulingLockArea, scheduledTasks, changedFullStatus + ); + } + + private final SWMRLong2ObjectHashTable chunkHolders = new SWMRLong2ObjectHashTable<>(16384, 0.25f); + // what a disaster of a name + // this is a map of removal tick to a map of chunks and the number of tickets a chunk has that are to expire that tick + private final Long2ObjectOpenHashMap removeTickToChunkExpireTicketCount = new Long2ObjectOpenHashMap<>(); + private final ServerLevel world; + private final ChunkTaskScheduler taskScheduler; + private long currentTick; + + private final ArrayDeque pendingFullLoadUpdate = new ArrayDeque<>(); + private final ObjectRBTreeSet autoSaveQueue = new ObjectRBTreeSet<>((final NewChunkHolder c1, final NewChunkHolder c2) -> { + if (c1 == c2) { + return 0; + } + + final int saveTickCompare = Long.compare(c1.lastAutoSave, c2.lastAutoSave); + + if (saveTickCompare != 0) { + return saveTickCompare; + } + + final long coord1 = CoordinateUtils.getChunkKey(c1.chunkX, c1.chunkZ); + final long coord2 = CoordinateUtils.getChunkKey(c2.chunkX, c2.chunkZ); + + if (coord1 == coord2) { + throw new IllegalStateException("Duplicate chunkholder in auto save queue"); + } + + return Long.compare(coord1, coord2); + }); + + public ChunkHolderManager(final ServerLevel world, final ChunkTaskScheduler taskScheduler) { + this.world = world; + this.taskScheduler = taskScheduler; + this.ticketLockArea = new ReentrantAreaLock(taskScheduler.getChunkSystemLockShift()); + this.unloadQueue = new ChunkQueue(world.getRegionChunkShift()); + } + + private final AtomicLong statusUpgradeId = new AtomicLong(); + + long getNextStatusUpgradeId() { + return this.statusUpgradeId.incrementAndGet(); + } + + public List getOldChunkHolders() { + final List holders = this.getChunkHolders(); + final List ret = new ArrayList<>(holders.size()); + for (final NewChunkHolder holder : holders) { + ret.add(holder.vanillaChunkHolder); + } + return ret; + } + + public List getChunkHolders() { + final List ret = new ArrayList<>(this.chunkHolders.size()); + this.chunkHolders.forEachValue(ret::add); + return ret; + } + + public int size() { + return this.chunkHolders.size(); + } + + public void close(final boolean save, final boolean halt) { + TickThread.ensureTickThread("Closing world off-main"); + if (halt) { + LOGGER.info("Waiting 60s for chunk system to halt for world '" + this.world.getWorld().getName() + "'"); + if (!this.taskScheduler.halt(true, TimeUnit.SECONDS.toNanos(60L))) { + LOGGER.warn("Failed to halt world generation/loading tasks for world '" + this.world.getWorld().getName() + "'"); + } else { + LOGGER.info("Halted chunk system for world '" + this.world.getWorld().getName() + "'"); + } + } + + if (save) { + this.saveAllChunks(true, true, true); + } + + if (this.world.chunkDataControllerNew.hasTasks() || this.world.entityDataControllerNew.hasTasks() || this.world.poiDataControllerNew.hasTasks()) { + RegionFileIOThread.flush(); + } + + // kill regionfile cache + try { + this.world.chunkDataControllerNew.getCache().close(); + } catch (final IOException ex) { + LOGGER.error("Failed to close chunk regionfile cache for world '" + this.world.getWorld().getName() + "'", ex); + } + try { + this.world.entityDataControllerNew.getCache().close(); + } catch (final IOException ex) { + LOGGER.error("Failed to close entity regionfile cache for world '" + this.world.getWorld().getName() + "'", ex); + } + try { + this.world.poiDataControllerNew.getCache().close(); + } catch (final IOException ex) { + LOGGER.error("Failed to close poi regionfile cache for world '" + this.world.getWorld().getName() + "'", ex); + } + } + + void ensureInAutosave(final NewChunkHolder holder) { + if (!this.autoSaveQueue.contains(holder)) { + holder.lastAutoSave = MinecraftServer.currentTick; + this.autoSaveQueue.add(holder); + } + } + + public void autoSave() { + final List reschedule = new ArrayList<>(); + final long currentTick = MinecraftServer.currentTickLong; + final long maxSaveTime = currentTick - this.world.paperConfig().chunks.autoSaveInterval.value(); + for (int autoSaved = 0; autoSaved < this.world.paperConfig().chunks.maxAutoSaveChunksPerTick && !this.autoSaveQueue.isEmpty();) { + final NewChunkHolder holder = this.autoSaveQueue.first(); + + if (holder.lastAutoSave > maxSaveTime) { + break; + } + + this.autoSaveQueue.remove(holder); + + holder.lastAutoSave = currentTick; + if (holder.save(false, false) != null) { + ++autoSaved; + } + + if (holder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)) { + reschedule.add(holder); + } + } + + for (final NewChunkHolder holder : reschedule) { + if (holder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)) { + this.autoSaveQueue.add(holder); + } + } + } + + public void saveAllChunks(final boolean flush, final boolean shutdown, final boolean logProgress) { + final List holders = this.getChunkHolders(); + + if (logProgress) { + LOGGER.info("Saving all chunkholders for world '" + this.world.getWorld().getName() + "'"); + } + + final DecimalFormat format = new DecimalFormat("#0.00"); + + int saved = 0; + + long start = System.nanoTime(); + long lastLog = start; + boolean needsFlush = false; + final int flushInterval = 50; + + int savedChunk = 0; + int savedEntity = 0; + int savedPoi = 0; + + for (int i = 0, len = holders.size(); i < len; ++i) { + final NewChunkHolder holder = holders.get(i); + try { + final NewChunkHolder.SaveStat saveStat = holder.save(shutdown, false); + if (saveStat != null) { + ++saved; + needsFlush = flush; + if (saveStat.savedChunk()) { + ++savedChunk; + } + if (saveStat.savedEntityChunk()) { + ++savedEntity; + } + if (saveStat.savedPoiChunk()) { + ++savedPoi; + } + } + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Failed to save chunk (" + holder.chunkX + "," + holder.chunkZ + ") in world '" + this.world.getWorld().getName() + "'", thr); + } + if (needsFlush && (saved % flushInterval) == 0) { + needsFlush = false; + RegionFileIOThread.partialFlush(flushInterval / 2); + } + if (logProgress) { + final long currTime = System.nanoTime(); + if ((currTime - lastLog) > TimeUnit.SECONDS.toNanos(10L)) { + lastLog = currTime; + LOGGER.info("Saved " + saved + " chunks (" + format.format((double)(i+1)/(double)len * 100.0) + "%) in world '" + this.world.getWorld().getName() + "'"); + } + } + } + if (flush) { + RegionFileIOThread.flush(); + if (this.world.paperConfig().chunks.flushRegionsOnSave) { + try { + this.world.chunkSource.chunkMap.regionFileCache.flush(); + } catch (IOException ex) { + LOGGER.error("Exception when flushing regions in world {}", this.world.getWorld().getName(), ex); + } + } + } + if (logProgress) { + LOGGER.info("Saved " + savedChunk + " block chunks, " + savedEntity + " entity chunks, " + savedPoi + " poi chunks in world '" + this.world.getWorld().getName() + "' in " + format.format(1.0E-9 * (System.nanoTime() - start)) + "s"); + } + } + + protected final ThreadedTicketLevelPropagator ticketLevelPropagator = new ThreadedTicketLevelPropagator() { + @Override + protected void processLevelUpdates(final Long2ByteLinkedOpenHashMap updates) { + // first the necessary chunkholders must be created, so just update the ticket levels + for (final Iterator iterator = updates.long2ByteEntrySet().fastIterator(); iterator.hasNext();) { + final Long2ByteMap.Entry entry = iterator.next(); + final long key = entry.getLongKey(); + final int newLevel = convertBetweenTicketLevels((int)entry.getByteValue()); + + NewChunkHolder current = ChunkHolderManager.this.chunkHolders.get(key); + if (current == null && newLevel > MAX_TICKET_LEVEL) { + // not loaded and it shouldn't be loaded! + iterator.remove(); + continue; + } + + final int currentLevel = current == null ? MAX_TICKET_LEVEL + 1 : current.getCurrentTicketLevel(); + if (currentLevel == newLevel) { + // nothing to do + iterator.remove(); + continue; + } + + if (current == null) { + // must create + current = ChunkHolderManager.this.createChunkHolder(key); + synchronized (ChunkHolderManager.this.chunkHolders) { + ChunkHolderManager.this.chunkHolders.put(key, current); + } + current.updateTicketLevel(newLevel); + } else { + current.updateTicketLevel(newLevel); + } + } + } + + @Override + protected void processSchedulingUpdates(final Long2ByteLinkedOpenHashMap updates, final List scheduledTasks, + final List changedFullStatus) { + final List prev = CURRENT_TICKET_UPDATE_SCHEDULING.get(); + CURRENT_TICKET_UPDATE_SCHEDULING.set(scheduledTasks); + try { + for (final LongIterator iterator = updates.keySet().iterator(); iterator.hasNext();) { + final long key = iterator.nextLong(); + final NewChunkHolder current = ChunkHolderManager.this.chunkHolders.get(key); + + if (current == null) { + throw new IllegalStateException("Expected chunk holder to be created"); + } + + current.processTicketLevelUpdate(scheduledTasks, changedFullStatus); + } + } finally { + CURRENT_TICKET_UPDATE_SCHEDULING.set(prev); + } + } + }; + // function for converting between ticket levels and propagator levels and vice versa + // the problem is the ticket level propagator will propagate from a set source down to zero, whereas mojang expects + // levels to propagate from a set value up to a maximum value. so we need to convert the levels we put into the propagator + // and the levels we get out of the propagator + + public static int convertBetweenTicketLevels(final int level) { + return ChunkLevel.MAX_LEVEL - level + 1; + } + + public String getTicketDebugString(final long coordinate) { + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(CoordinateUtils.getChunkX(coordinate), CoordinateUtils.getChunkZ(coordinate)); + try { + final SortedArraySet> tickets = this.tickets.get(new RegionFileIOThread.ChunkCoordinate(coordinate)); + + return tickets != null ? tickets.first().toString() : "no_ticket"; + } finally { + if (ticketLock != null) { + this.ticketLockArea.unlock(ticketLock); + } + } + } + + public Long2ObjectOpenHashMap>> getTicketsCopy() { + final Long2ObjectOpenHashMap>> ret = new Long2ObjectOpenHashMap<>(); + final Long2ObjectOpenHashMap> sections = new Long2ObjectOpenHashMap(); + final int sectionShift = this.taskScheduler.getChunkSystemLockShift(); + for (final RegionFileIOThread.ChunkCoordinate coord : this.tickets.keySet()) { + sections.computeIfAbsent( + CoordinateUtils.getChunkKey( + CoordinateUtils.getChunkX(coord.key) >> sectionShift, + CoordinateUtils.getChunkZ(coord.key) >> sectionShift + ), + (final long keyInMap) -> { + return new ArrayList<>(); + } + ).add(coord); + } + + for (final Iterator>> iterator = sections.long2ObjectEntrySet().fastIterator(); + iterator.hasNext();) { + final Long2ObjectMap.Entry> entry = iterator.next(); + final long sectionKey = entry.getLongKey(); + final List coordinates = entry.getValue(); + + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( + CoordinateUtils.getChunkX(sectionKey) << sectionShift, + CoordinateUtils.getChunkZ(sectionKey) << sectionShift + ); + try { + for (final RegionFileIOThread.ChunkCoordinate coord : coordinates) { + final SortedArraySet> tickets = this.tickets.get(coord); + if (tickets == null) { + // removed before we acquired lock + continue; + } + ret.put(coord.key, new SortedArraySet<>(tickets)); + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + } + + return ret; + } + + public Collection getPluginChunkTickets(int x, int z) { + ImmutableList.Builder ret; + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(x, z); + try { + final long coordinate = CoordinateUtils.getChunkKey(x, z); + final SortedArraySet> tickets = this.tickets.get(new RegionFileIOThread.ChunkCoordinate(coordinate)); + + if (tickets == null) { + return Collections.emptyList(); + } + + ret = ImmutableList.builder(); + for (Ticket ticket : tickets) { + if (ticket.getType() == TicketType.PLUGIN_TICKET) { + ret.add((Plugin)ticket.key); + } + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + + return ret.build(); + } + + protected final void updateTicketLevel(final long coordinate, final int ticketLevel) { + if (ticketLevel > ChunkLevel.MAX_LEVEL) { + this.ticketLevelPropagator.removeSource(CoordinateUtils.getChunkX(coordinate), CoordinateUtils.getChunkZ(coordinate)); + } else { + this.ticketLevelPropagator.setSource(CoordinateUtils.getChunkX(coordinate), CoordinateUtils.getChunkZ(coordinate), convertBetweenTicketLevels(ticketLevel)); + } + } + + private static int getTicketLevelAt(SortedArraySet> tickets) { + return !tickets.isEmpty() ? tickets.first().getTicketLevel() : MAX_TICKET_LEVEL + 1; + } + + public boolean addTicketAtLevel(final TicketType type, final ChunkPos chunkPos, final int level, + final T identifier) { + return this.addTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkPos), level, identifier); + } + + public boolean addTicketAtLevel(final TicketType type, final int chunkX, final int chunkZ, final int level, + final T identifier) { + return this.addTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkX, chunkZ), level, identifier); + } + + private void addExpireCount(final int chunkX, final int chunkZ) { + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + + final int sectionShift = this.world.getRegionChunkShift(); + final RegionFileIOThread.ChunkCoordinate sectionKey = new RegionFileIOThread.ChunkCoordinate(CoordinateUtils.getChunkKey( + chunkX >> sectionShift, + chunkZ >> sectionShift + )); + + this.sectionToChunkToExpireCount.computeIfAbsent(sectionKey, (final RegionFileIOThread.ChunkCoordinate keyInMap) -> { + return new Long2IntOpenHashMap(); + }).addTo(chunkKey, 1); + } + + private void removeExpireCount(final int chunkX, final int chunkZ) { + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + + final int sectionShift = this.world.getRegionChunkShift(); + final RegionFileIOThread.ChunkCoordinate sectionKey = new RegionFileIOThread.ChunkCoordinate(CoordinateUtils.getChunkKey( + chunkX >> sectionShift, + chunkZ >> sectionShift + )); + + final Long2IntOpenHashMap removeCounts = this.sectionToChunkToExpireCount.get(sectionKey); + final int prevCount = removeCounts.addTo(chunkKey, -1); + + if (prevCount == 1) { + removeCounts.remove(chunkKey); + if (removeCounts.isEmpty()) { + this.sectionToChunkToExpireCount.remove(sectionKey); + } + } + } + + // supposed to return true if the ticket was added and did not replace another + // but, we always return false if the ticket cannot be added + public boolean addTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier) { + return this.addTicketAtLevel(type, chunk, level, identifier, true); + } + + boolean addTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier, final boolean lock) { + final long removeDelay = type.timeout <= 0 ? NO_TIMEOUT_MARKER : type.timeout; + if (level > MAX_TICKET_LEVEL) { + return false; + } + + final int chunkX = CoordinateUtils.getChunkX(chunk); + final int chunkZ = CoordinateUtils.getChunkZ(chunk); + final RegionFileIOThread.ChunkCoordinate chunkCoord = new RegionFileIOThread.ChunkCoordinate(chunk); + final Ticket ticket = new Ticket<>(type, level, identifier, removeDelay); + + final ReentrantAreaLock.Node ticketLock = lock ? this.ticketLockArea.lock(chunkX, chunkZ) : null; + try { + final SortedArraySet> ticketsAtChunk = this.tickets.computeIfAbsent(chunkCoord, (final RegionFileIOThread.ChunkCoordinate keyInMap) -> { + return SortedArraySet.create(4); + }); + + final int levelBefore = getTicketLevelAt(ticketsAtChunk); + final Ticket current = (Ticket)ticketsAtChunk.replace(ticket); + final int levelAfter = getTicketLevelAt(ticketsAtChunk); + + if (current != ticket) { + final long oldRemoveDelay = current.removeDelay; + if (removeDelay != oldRemoveDelay) { + if (oldRemoveDelay != NO_TIMEOUT_MARKER && removeDelay == NO_TIMEOUT_MARKER) { + this.removeExpireCount(chunkX, chunkZ); + } else if (oldRemoveDelay == NO_TIMEOUT_MARKER) { + // since old != new, we have that NO_TIMEOUT_MARKER != new + this.addExpireCount(chunkX, chunkZ); + } + } + } else { + if (removeDelay != NO_TIMEOUT_MARKER) { + this.addExpireCount(chunkX, chunkZ); + } + } + + if (levelBefore != levelAfter) { + this.updateTicketLevel(chunk, levelAfter); + } + + return current == ticket; + } finally { + if (ticketLock != null) { + this.ticketLockArea.unlock(ticketLock); + } + } + } + + public boolean removeTicketAtLevel(final TicketType type, final ChunkPos chunkPos, final int level, final T identifier) { + return this.removeTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkPos), level, identifier); + } + + public boolean removeTicketAtLevel(final TicketType type, final int chunkX, final int chunkZ, final int level, final T identifier) { + return this.removeTicketAtLevel(type, CoordinateUtils.getChunkKey(chunkX, chunkZ), level, identifier); + } + + public boolean removeTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier) { + return this.removeTicketAtLevel(type, chunk, level, identifier, true); + } + + boolean removeTicketAtLevel(final TicketType type, final long chunk, final int level, final T identifier, final boolean lock) { + if (level > MAX_TICKET_LEVEL) { + return false; + } + + final int chunkX = CoordinateUtils.getChunkX(chunk); + final int chunkZ = CoordinateUtils.getChunkZ(chunk); + final RegionFileIOThread.ChunkCoordinate chunkCoord = new RegionFileIOThread.ChunkCoordinate(chunk); + final Ticket probe = new Ticket<>(type, level, identifier, PROBE_MARKER); + + final ReentrantAreaLock.Node ticketLock = lock ? this.ticketLockArea.lock(chunkX, chunkZ) : null; + try { + final SortedArraySet> ticketsAtChunk = this.tickets.get(chunkCoord); + if (ticketsAtChunk == null) { + return false; + } + + final int oldLevel = getTicketLevelAt(ticketsAtChunk); + final Ticket ticket = (Ticket)ticketsAtChunk.removeAndGet(probe); + + if (ticket == null) { + return false; + } + + final int newLevel = getTicketLevelAt(ticketsAtChunk); + // we should not change the ticket levels while the target region may be ticking + if (oldLevel != newLevel) { + // Delay unload chunk patch originally by Aikar, updated to 1.20 by jpenilla + // these days, the patch is mostly useful to keep chunks ticking when players teleport + // so that their pets can teleport with them as well. + final long delayTimeout = this.world.paperConfig().chunks.delayChunkUnloadsBy.ticks(); + final TicketType toAdd; + final long timeout; + if (type == RegionizedPlayerChunkLoader.REGION_PLAYER_TICKET && delayTimeout > 0) { + toAdd = TicketType.DELAY_UNLOAD; + timeout = delayTimeout; + } else { + toAdd = TicketType.UNKNOWN; + // always expect UNKNOWN to be > 1, but just in case + timeout = Math.max(1, toAdd.timeout); + } + final Ticket unknownTicket = new Ticket<>(toAdd, level, new ChunkPos(chunk), timeout); + if (ticketsAtChunk.add(unknownTicket)) { + this.addExpireCount(chunkX, chunkZ); + } else { + throw new IllegalStateException("Should have been able to add " + unknownTicket + " to " + ticketsAtChunk); + } + } + + final long removeDelay = ticket.removeDelay; + if (removeDelay != NO_TIMEOUT_MARKER) { + this.removeExpireCount(chunkX, chunkZ); + } + + return true; + } finally { + if (ticketLock != null) { + this.ticketLockArea.unlock(ticketLock); + } + } + } + + // atomic with respect to all add/remove/addandremove ticket calls for the given chunk + public void addAndRemoveTickets(final long chunk, final TicketType addType, final int addLevel, final T addIdentifier, + final TicketType removeType, final int removeLevel, final V removeIdentifier) { + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(CoordinateUtils.getChunkX(chunk), CoordinateUtils.getChunkZ(chunk)); + try { + this.addTicketAtLevel(addType, chunk, addLevel, addIdentifier, false); + this.removeTicketAtLevel(removeType, chunk, removeLevel, removeIdentifier, false); + } finally { + this.ticketLockArea.unlock(ticketLock); + } + } + + // atomic with respect to all add/remove/addandremove ticket calls for the given chunk + public boolean addIfRemovedTicket(final long chunk, final TicketType addType, final int addLevel, final T addIdentifier, + final TicketType removeType, final int removeLevel, final V removeIdentifier) { + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(CoordinateUtils.getChunkX(chunk), CoordinateUtils.getChunkZ(chunk)); + try { + if (this.removeTicketAtLevel(removeType, chunk, removeLevel, removeIdentifier, false)) { + this.addTicketAtLevel(addType, chunk, addLevel, addIdentifier, false); + return true; + } + return false; + } finally { + this.ticketLockArea.unlock(ticketLock); + } + } + + public void removeAllTicketsFor(final TicketType ticketType, final int ticketLevel, final T ticketIdentifier) { + if (ticketLevel > MAX_TICKET_LEVEL) { + return; + } + + final Long2ObjectOpenHashMap> sections = new Long2ObjectOpenHashMap(); + final int sectionShift = this.taskScheduler.getChunkSystemLockShift(); + for (final RegionFileIOThread.ChunkCoordinate coord : this.tickets.keySet()) { + sections.computeIfAbsent( + CoordinateUtils.getChunkKey( + CoordinateUtils.getChunkX(coord.key) >> sectionShift, + CoordinateUtils.getChunkZ(coord.key) >> sectionShift + ), + (final long keyInMap) -> { + return new ArrayList<>(); + } + ).add(coord); + } + + for (final Iterator>> iterator = sections.long2ObjectEntrySet().fastIterator(); + iterator.hasNext();) { + final Long2ObjectMap.Entry> entry = iterator.next(); + final long sectionKey = entry.getLongKey(); + final List coordinates = entry.getValue(); + + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( + CoordinateUtils.getChunkX(sectionKey) << sectionShift, + CoordinateUtils.getChunkZ(sectionKey) << sectionShift + ); + try { + for (final RegionFileIOThread.ChunkCoordinate coord : coordinates) { + this.removeTicketAtLevel(ticketType, coord.key, ticketLevel, ticketIdentifier, false); + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + } + } + + public void tick() { + final int sectionShift = this.world.getRegionChunkShift(); + + final Predicate> expireNow = (final Ticket ticket) -> { + if (ticket.removeDelay == NO_TIMEOUT_MARKER) { + return false; + } + return --ticket.removeDelay <= 0L; + }; + + for (final Iterator iterator = this.sectionToChunkToExpireCount.keySet().iterator(); iterator.hasNext();) { + final RegionFileIOThread.ChunkCoordinate section = iterator.next(); + final long sectionKey = section.key; + + if (!this.sectionToChunkToExpireCount.containsKey(section)) { + // removed concurrently + continue; + } + + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock( + CoordinateUtils.getChunkX(sectionKey) << sectionShift, + CoordinateUtils.getChunkZ(sectionKey) << sectionShift + ); + + try { + final Long2IntOpenHashMap chunkToExpireCount = this.sectionToChunkToExpireCount.get(section); + if (chunkToExpireCount == null) { + // lost to some race + continue; + } + + for (final Iterator iterator1 = chunkToExpireCount.long2IntEntrySet().fastIterator(); iterator1.hasNext();) { + final Long2IntMap.Entry entry = iterator1.next(); + + final long chunkKey = entry.getLongKey(); + final int expireCount = entry.getIntValue(); + + final RegionFileIOThread.ChunkCoordinate chunk = new RegionFileIOThread.ChunkCoordinate(chunkKey); + + final SortedArraySet> tickets = this.tickets.get(chunk); + final int levelBefore = getTicketLevelAt(tickets); + + final int sizeBefore = tickets.size(); + tickets.removeIf(expireNow); + final int sizeAfter = tickets.size(); + final int levelAfter = getTicketLevelAt(tickets); + + if (tickets.isEmpty()) { + this.tickets.remove(chunk); + } + if (levelBefore != levelAfter) { + this.updateTicketLevel(chunkKey, levelAfter); + } + + final int newExpireCount = expireCount - (sizeBefore - sizeAfter); + + if (newExpireCount == expireCount) { + continue; + } + + if (newExpireCount != 0) { + entry.setValue(newExpireCount); + } else { + iterator1.remove(); + } + } + + if (chunkToExpireCount.isEmpty()) { + this.sectionToChunkToExpireCount.remove(section); + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + } + + this.processTicketUpdates(); + } + + public NewChunkHolder getChunkHolder(final int chunkX, final int chunkZ) { + return this.chunkHolders.get(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + + public NewChunkHolder getChunkHolder(final long position) { + return this.chunkHolders.get(position); + } + + public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { + final NewChunkHolder chunkHolder = this.getChunkHolder(x, z); + if (chunkHolder != null) { + chunkHolder.raisePriority(priority); + } + } + + public void setPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { + final NewChunkHolder chunkHolder = this.getChunkHolder(x, z); + if (chunkHolder != null) { + chunkHolder.setPriority(priority); + } + } + + public void lowerPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { + final NewChunkHolder chunkHolder = this.getChunkHolder(x, z); + if (chunkHolder != null) { + chunkHolder.lowerPriority(priority); + } + } + + private NewChunkHolder createChunkHolder(final long position) { + final NewChunkHolder ret = new NewChunkHolder(this.world, CoordinateUtils.getChunkX(position), CoordinateUtils.getChunkZ(position), this.taskScheduler); + + ChunkSystem.onChunkHolderCreate(this.world, ret.vanillaChunkHolder); + ret.vanillaChunkHolder.onChunkAdd(); + + return ret; + } + + // because this function creates the chunk holder without a ticket, it is the caller's responsibility to ensure + // the chunk holder eventually unloads. this should only be used to avoid using processTicketUpdates to create chunkholders, + // as processTicketUpdates may call plugin logic; in every other case a ticket is appropriate + private NewChunkHolder getOrCreateChunkHolder(final int chunkX, final int chunkZ) { + return this.getOrCreateChunkHolder(CoordinateUtils.getChunkKey(chunkX, chunkZ)); + } + + private NewChunkHolder getOrCreateChunkHolder(final long position) { + final int chunkX = CoordinateUtils.getChunkX(position); + final int chunkZ = CoordinateUtils.getChunkZ(position); + + if (!this.ticketLockArea.isHeldByCurrentThread(chunkX, chunkZ)) { + throw new IllegalStateException("Must hold ticket level update lock!"); + } + if (!this.taskScheduler.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ)) { + throw new IllegalStateException("Must hold scheduler lock!!"); + } + + // we could just acquire these locks, but... + // must own the locks because the caller needs to ensure that no unload can occur AFTER this function returns + + NewChunkHolder current = this.chunkHolders.get(position); + if (current != null) { + return current; + } + + current = this.createChunkHolder(position); + synchronized (this.chunkHolders) { + this.chunkHolders.put(position, current); + } + + return current; + } + + private final AtomicLong entityLoadCounter = new AtomicLong(); + + public ChunkEntitySlices getOrCreateEntityChunk(final int chunkX, final int chunkZ, final boolean transientChunk) { + TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot create entity chunk off-main"); + ChunkEntitySlices ret; + + NewChunkHolder current = this.getChunkHolder(chunkX, chunkZ); + if (current != null && (ret = current.getEntityChunk()) != null && (transientChunk || !ret.isTransient())) { + return ret; + } + + final AtomicBoolean isCompleted = new AtomicBoolean(); + final Thread waiter = Thread.currentThread(); + final Long entityLoadId = Long.valueOf(this.entityLoadCounter.getAndIncrement()); + NewChunkHolder.GenericDataLoadTaskCallback loadTask = null; + final ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(chunkX, chunkZ); + try { + this.addTicketAtLevel(TicketType.ENTITY_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, entityLoadId); + final ReentrantAreaLock.Node schedulingLock = this.taskScheduler.schedulingLockArea.lock(chunkX, chunkZ); + try { + current = this.getOrCreateChunkHolder(chunkX, chunkZ); + if ((ret = current.getEntityChunk()) != null && (transientChunk || !ret.isTransient())) { + this.removeTicketAtLevel(TicketType.ENTITY_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, entityLoadId); + return ret; + } + + if (current.isEntityChunkNBTLoaded()) { + isCompleted.setPlain(true); + } else { + loadTask = current.getOrLoadEntityData((final GenericDataLoadTask.TaskResult result) -> { + if (!transientChunk) { + isCompleted.set(true); + LockSupport.unpark(waiter); + } + }); + final ChunkLoadTask.EntityDataLoadTask entityLoad = current.getEntityDataLoadTask(); + + if (entityLoad != null && !transientChunk) { + entityLoad.raisePriority(PrioritisedExecutor.Priority.BLOCKING); + } + } + } finally { + this.taskScheduler.schedulingLockArea.unlock(schedulingLock); + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + + if (loadTask != null) { + loadTask.schedule(); + } + + if (!transientChunk) { + // Note: no need to busy wait on the chunk queue, entity load will complete off-main + boolean interrupted = false; + while (!isCompleted.get()) { + interrupted |= Thread.interrupted(); + LockSupport.park(); + } + + if (interrupted) { + Thread.currentThread().interrupt(); + } + } + + // now that the entity data is loaded, we can load it into the world + + ret = current.loadInEntityChunk(transientChunk); + + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + this.addAndRemoveTickets(chunkKey, + TicketType.UNKNOWN, MAX_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ), + TicketType.ENTITY_LOAD, MAX_TICKET_LEVEL, entityLoadId + ); + + return ret; + } + + public PoiChunk getPoiChunkIfLoaded(final int chunkX, final int chunkZ, final boolean checkLoadInCallback) { + final NewChunkHolder holder = this.getChunkHolder(chunkX, chunkZ); + if (holder != null) { + final PoiChunk ret = holder.getPoiChunk(); + return ret == null || (checkLoadInCallback && !ret.isLoaded()) ? null : ret; + } + return null; + } + + private final AtomicLong poiLoadCounter = new AtomicLong(); + + public PoiChunk loadPoiChunk(final int chunkX, final int chunkZ) { + TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Cannot create poi chunk off-main"); + PoiChunk ret; + + NewChunkHolder current = this.getChunkHolder(chunkX, chunkZ); + if (current != null && (ret = current.getPoiChunk()) != null) { + if (!ret.isLoaded()) { + ret.load(); + } + return ret; + } + + final AtomicReference completed = new AtomicReference<>(); + final AtomicBoolean isCompleted = new AtomicBoolean(); + final Thread waiter = Thread.currentThread(); + final Long poiLoadId = Long.valueOf(this.poiLoadCounter.getAndIncrement()); + NewChunkHolder.GenericDataLoadTaskCallback loadTask = null; + final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(chunkX, chunkZ); // Folia - use area based lock to reduce contention + try { + // Folia - use area based lock to reduce contention + this.addTicketAtLevel(TicketType.POI_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, poiLoadId); + final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node schedulingLock = this.taskScheduler.schedulingLockArea.lock(chunkX, chunkZ); // Folia - use area based lock to reduce contention + try { + current = this.getOrCreateChunkHolder(chunkX, chunkZ); + if (current.isPoiChunkLoaded()) { + this.removeTicketAtLevel(TicketType.POI_LOAD, chunkX, chunkZ, MAX_TICKET_LEVEL, poiLoadId); + return current.getPoiChunk(); + } + + loadTask = current.getOrLoadPoiData((final GenericDataLoadTask.TaskResult result) -> { + completed.setPlain(result.left()); + isCompleted.set(true); + LockSupport.unpark(waiter); + }); + final ChunkLoadTask.PoiDataLoadTask poiLoad = current.getPoiDataLoadTask(); + + if (poiLoad != null) { + poiLoad.raisePriority(PrioritisedExecutor.Priority.BLOCKING); + } + } finally { + this.taskScheduler.schedulingLockArea.unlock(schedulingLock); // Folia - use area based lock to reduce contention + } + } finally { + this.ticketLockArea.unlock(ticketLock); // Folia - use area based lock to reduce contention + } + + if (loadTask != null) { + loadTask.schedule(); + } + + // Note: no need to busy wait on the chunk queue, poi load will complete off-main + + boolean interrupted = false; + while (!isCompleted.get()) { + interrupted |= Thread.interrupted(); + LockSupport.park(); + } + + if (interrupted) { + Thread.currentThread().interrupt(); + } + + ret = completed.getPlain(); + + ret.load(); + + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + this.addAndRemoveTickets(chunkKey, + TicketType.UNKNOWN, MAX_TICKET_LEVEL, new ChunkPos(chunkX, chunkZ), + TicketType.POI_LOAD, MAX_TICKET_LEVEL, poiLoadId + ); + + return ret; + } + + void addChangedStatuses(final List changedFullStatus) { + if (changedFullStatus.isEmpty()) { + return; + } + if (!TickThread.isTickThread()) { + this.taskScheduler.scheduleChunkTask(() -> { + final ArrayDeque pendingFullLoadUpdate = ChunkHolderManager.this.pendingFullLoadUpdate; + for (int i = 0, len = changedFullStatus.size(); i < len; ++i) { + pendingFullLoadUpdate.add(changedFullStatus.get(i)); + } + + ChunkHolderManager.this.processPendingFullUpdate(); + }, PrioritisedExecutor.Priority.HIGHEST); + } else { + final ArrayDeque pendingFullLoadUpdate = this.pendingFullLoadUpdate; + for (int i = 0, len = changedFullStatus.size(); i < len; ++i) { + pendingFullLoadUpdate.add(changedFullStatus.get(i)); + } + } + } + + private void removeChunkHolder(final NewChunkHolder holder) { + holder.killed = true; + holder.vanillaChunkHolder.onChunkRemove(); + this.autoSaveQueue.remove(holder); + ChunkSystem.onChunkHolderDelete(this.world, holder.vanillaChunkHolder); + synchronized (this.chunkHolders) { + this.chunkHolders.remove(CoordinateUtils.getChunkKey(holder.chunkX, holder.chunkZ)); + } + } + + // note: never call while inside the chunk system, this will absolutely break everything + public void processUnloads() { + TickThread.ensureTickThread("Cannot unload chunks off-main"); + + if (BLOCK_TICKET_UPDATES.get() == Boolean.TRUE) { + throw new IllegalStateException("Cannot unload chunks recursively"); + } + final int sectionShift = this.unloadQueue.coordinateShift; // sectionShift <= lock shift + final List unloadSectionsForRegion = this.unloadQueue.retrieveForAllRegions(); + int unloadCountTentative = 0; + for (final ChunkQueue.SectionToUnload sectionRef : unloadSectionsForRegion) { + final ChunkQueue.UnloadSection section + = this.unloadQueue.getSectionUnsynchronized(sectionRef.sectionX(), sectionRef.sectionZ()); + + if (section == null) { + // removed concurrently + continue; + } + + // technically reading the size field is unsafe, and it may be incorrect. + // We assume that the error here cumulatively goes away over many ticks. If it did not, then it is possible + // for chunks to never unload or not unload fast enough. + unloadCountTentative += section.chunks.size(); + } + + if (unloadCountTentative <= 0) { + // no work to do + return; + } + + // Note: The behaviour that we process ticket updates while holding the lock has been dropped here, as it is racey behavior. + // But, we do need to process updates here so that any add ticket that is synchronised before this call does not go missed. + this.processTicketUpdates(); + + final int toUnloadCount = Math.max(50, (int)(unloadCountTentative * 0.05)); + int processedCount = 0; + + for (final ChunkQueue.SectionToUnload sectionRef : unloadSectionsForRegion) { + final List stage1 = new ArrayList<>(); + final List stage2 = new ArrayList<>(); + + final int sectionLowerX = sectionRef.sectionX() << sectionShift; + final int sectionLowerZ = sectionRef.sectionZ() << sectionShift; + + // stage 1: set up for stage 2 while holding critical locks + ReentrantAreaLock.Node ticketLock = this.ticketLockArea.lock(sectionLowerX, sectionLowerZ); + try { + final ReentrantAreaLock.Node scheduleLock = this.taskScheduler.schedulingLockArea.lock(sectionLowerX, sectionLowerZ); + try { + final ChunkQueue.UnloadSection section + = this.unloadQueue.getSectionUnsynchronized(sectionRef.sectionX(), sectionRef.sectionZ()); + + if (section == null) { + // removed concurrently + continue; + } + + // collect the holders to run stage 1 on + final int sectionCount = section.chunks.size(); + + if ((sectionCount + processedCount) <= toUnloadCount) { + // we can just drain the entire section + + for (final LongIterator iterator = section.chunks.iterator(); iterator.hasNext();) { + final NewChunkHolder holder = this.chunkHolders.get(iterator.nextLong()); + if (holder == null) { + throw new IllegalStateException(); + } + stage1.add(holder); + } + + // remove section + this.unloadQueue.removeSection(sectionRef.sectionX(), sectionRef.sectionZ()); + } else { + // processedCount + len = toUnloadCount + // we cannot drain the entire section + for (int i = 0, len = toUnloadCount - processedCount; i < len; ++i) { + final NewChunkHolder holder = this.chunkHolders.get(section.chunks.removeFirstLong()); + if (holder == null) { + throw new IllegalStateException(); + } + stage1.add(holder); + } + } + + // run stage 1 + for (int i = 0, len = stage1.size(); i < len; ++i) { + final NewChunkHolder chunkHolder = stage1.get(i); + if (chunkHolder.isSafeToUnload() != null) { + LOGGER.error("Chunkholder " + chunkHolder + " is not safe to unload but is inside the unload queue?"); + continue; + } + final NewChunkHolder.UnloadState state = chunkHolder.unloadStage1(); + if (state == null) { + // can unload immediately + this.removeChunkHolder(chunkHolder); + continue; + } + stage2.add(state); + } + } finally { + this.taskScheduler.schedulingLockArea.unlock(scheduleLock); + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + + // stage 2: invoke expensive unload logic, designed to run without locks thanks to stage 1 + final List stage3 = new ArrayList<>(stage2.size()); + + final Boolean before = this.blockTicketUpdates(); + try { + for (int i = 0, len = stage2.size(); i < len; ++i) { + final NewChunkHolder.UnloadState state = stage2.get(i); + final NewChunkHolder holder = state.holder(); + + holder.unloadStage2(state); + stage3.add(holder); + } + } finally { + this.unblockTicketUpdates(before); + } + + // stage 3: actually attempt to remove the chunk holders + ticketLock = this.ticketLockArea.lock(sectionLowerX, sectionLowerZ); + try { + final ReentrantAreaLock.Node scheduleLock = this.taskScheduler.schedulingLockArea.lock(sectionLowerX, sectionLowerZ); + try { + for (int i = 0, len = stage3.size(); i < len; ++i) { + final NewChunkHolder holder = stage3.get(i); + + if (holder.unloadStage3()) { + this.removeChunkHolder(holder); + } else { + // add cooldown so the next unload check is not immediately next tick + this.addTicketAtLevel(TicketType.UNLOAD_COOLDOWN, CoordinateUtils.getChunkKey(holder.chunkX, holder.chunkZ), MAX_TICKET_LEVEL, Unit.INSTANCE, false); + } + } + } finally { + this.taskScheduler.schedulingLockArea.unlock(scheduleLock); + } + } finally { + this.ticketLockArea.unlock(ticketLock); + } + + processedCount += stage1.size(); + + if (processedCount >= toUnloadCount) { + break; + } + } + } + + public enum TicketOperationType { + ADD, REMOVE, ADD_IF_REMOVED, ADD_AND_REMOVE + } + + public static record TicketOperation ( + TicketOperationType op, long chunkCoord, + TicketType ticketType, int ticketLevel, T identifier, + TicketType ticketType2, int ticketLevel2, V identifier2 + ) { + + private TicketOperation(TicketOperationType op, long chunkCoord, + TicketType ticketType, int ticketLevel, T identifier) { + this(op, chunkCoord, ticketType, ticketLevel, identifier, null, 0, null); + } + + public static TicketOperation addOp(final ChunkPos chunk, final TicketType type, final int ticketLevel, final T identifier) { + return addOp(CoordinateUtils.getChunkKey(chunk), type, ticketLevel, identifier); + } + + public static TicketOperation addOp(final int chunkX, final int chunkZ, final TicketType type, final int ticketLevel, final T identifier) { + return addOp(CoordinateUtils.getChunkKey(chunkX, chunkZ), type, ticketLevel, identifier); + } + + public static TicketOperation addOp(final long chunk, final TicketType type, final int ticketLevel, final T identifier) { + return new TicketOperation<>(TicketOperationType.ADD, chunk, type, ticketLevel, identifier); + } + + public static TicketOperation removeOp(final ChunkPos chunk, final TicketType type, final int ticketLevel, final T identifier) { + return removeOp(CoordinateUtils.getChunkKey(chunk), type, ticketLevel, identifier); + } + + public static TicketOperation removeOp(final int chunkX, final int chunkZ, final TicketType type, final int ticketLevel, final T identifier) { + return removeOp(CoordinateUtils.getChunkKey(chunkX, chunkZ), type, ticketLevel, identifier); + } + + public static TicketOperation removeOp(final long chunk, final TicketType type, final int ticketLevel, final T identifier) { + return new TicketOperation<>(TicketOperationType.REMOVE, chunk, type, ticketLevel, identifier); + } + + public static TicketOperation addIfRemovedOp(final long chunk, + final TicketType addType, final int addLevel, final T addIdentifier, + final TicketType removeType, final int removeLevel, final V removeIdentifier) { + return new TicketOperation<>( + TicketOperationType.ADD_IF_REMOVED, chunk, addType, addLevel, addIdentifier, + removeType, removeLevel, removeIdentifier + ); + } + + public static TicketOperation addAndRemove(final long chunk, + final TicketType addType, final int addLevel, final T addIdentifier, + final TicketType removeType, final int removeLevel, final V removeIdentifier) { + return new TicketOperation<>( + TicketOperationType.ADD_AND_REMOVE, chunk, addType, addLevel, addIdentifier, + removeType, removeLevel, removeIdentifier + ); + } + } + + private boolean processTicketOp(TicketOperation operation) { + boolean ret = false; + switch (operation.op) { + case ADD: { + ret |= this.addTicketAtLevel(operation.ticketType, operation.chunkCoord, operation.ticketLevel, operation.identifier); + break; + } + case REMOVE: { + ret |= this.removeTicketAtLevel(operation.ticketType, operation.chunkCoord, operation.ticketLevel, operation.identifier); + break; + } + case ADD_IF_REMOVED: { + ret |= this.addIfRemovedTicket( + operation.chunkCoord, + operation.ticketType, operation.ticketLevel, operation.identifier, + operation.ticketType2, operation.ticketLevel2, operation.identifier2 + ); + break; + } + case ADD_AND_REMOVE: { + ret = true; + this.addAndRemoveTickets( + operation.chunkCoord, + operation.ticketType, operation.ticketLevel, operation.identifier, + operation.ticketType2, operation.ticketLevel2, operation.identifier2 + ); + break; + } + } + + return ret; + } + + public void performTicketUpdates(final Collection> operations) { + for (final TicketOperation operation : operations) { + this.processTicketOp(operation); + } + } + + private final ThreadLocal BLOCK_TICKET_UPDATES = ThreadLocal.withInitial(() -> { + return Boolean.FALSE; + }); + + public Boolean blockTicketUpdates() { + final Boolean ret = BLOCK_TICKET_UPDATES.get(); + BLOCK_TICKET_UPDATES.set(Boolean.TRUE); + return ret; + } + + public void unblockTicketUpdates(final Boolean before) { + BLOCK_TICKET_UPDATES.set(before); + } + + public boolean processTicketUpdates() { + return this.processTicketUpdates(true, true, null); + } + + private static final ThreadLocal> CURRENT_TICKET_UPDATE_SCHEDULING = new ThreadLocal<>(); + + static List getCurrentTicketUpdateScheduling() { + return CURRENT_TICKET_UPDATE_SCHEDULING.get(); + } + + private boolean processTicketUpdates(final boolean checkLocks, final boolean processFullUpdates, List scheduledTasks) { + TickThread.ensureTickThread("Cannot process ticket levels off-main"); + if (BLOCK_TICKET_UPDATES.get() == Boolean.TRUE) { + throw new IllegalStateException("Cannot update ticket level while unloading chunks or updating entity manager"); + } + + List changedFullStatus = null; + + final boolean isTickThread = TickThread.isTickThread(); + + boolean ret = false; + final boolean canProcessFullUpdates = processFullUpdates & isTickThread; + final boolean canProcessScheduling = scheduledTasks == null; + + if (this.ticketLevelPropagator.hasPendingUpdates()) { + if (scheduledTasks == null) { + scheduledTasks = new ArrayList<>(); + } + changedFullStatus = new ArrayList<>(); + + ret |= this.ticketLevelPropagator.performUpdates( + this.ticketLockArea, this.taskScheduler.schedulingLockArea, + scheduledTasks, changedFullStatus + ); + } + + if (changedFullStatus != null) { + this.addChangedStatuses(changedFullStatus); + } + + if (canProcessScheduling && scheduledTasks != null) { + for (int i = 0, len = scheduledTasks.size(); i < len; ++i) { + scheduledTasks.get(i).schedule(); + } + } + + if (canProcessFullUpdates) { + ret |= this.processPendingFullUpdate(); + } + + return ret; + } + + // only call on tick thread + protected final boolean processPendingFullUpdate() { + final ArrayDeque pendingFullLoadUpdate = this.pendingFullLoadUpdate; + + boolean ret = false; + + List changedFullStatus = new ArrayList<>(); + + NewChunkHolder holder; + while ((holder = pendingFullLoadUpdate.poll()) != null) { + ret |= holder.handleFullStatusChange(changedFullStatus); + + if (!changedFullStatus.isEmpty()) { + for (int i = 0, len = changedFullStatus.size(); i < len; ++i) { + pendingFullLoadUpdate.add(changedFullStatus.get(i)); + } + changedFullStatus.clear(); + } + } + + return ret; + } + + public JsonObject getDebugJsonForWatchdog() { + return this.getDebugJsonNoLock(); + } + + private JsonObject getDebugJsonNoLock() { + final JsonObject ret = new JsonObject(); + ret.addProperty("current_tick", Long.valueOf(this.currentTick)); + + final JsonArray unloadQueue = new JsonArray(); + ret.add("unload_queue", unloadQueue); + ret.addProperty("lock_shift", Integer.valueOf(this.taskScheduler.getChunkSystemLockShift())); + ret.addProperty("ticket_shift", Integer.valueOf(ThreadedTicketLevelPropagator.SECTION_SHIFT)); + ret.addProperty("region_shift", Integer.valueOf(this.world.getRegionChunkShift())); + for (final ChunkQueue.SectionToUnload section : this.unloadQueue.retrieveForAllRegions()) { + final JsonObject sectionJson = new JsonObject(); + unloadQueue.add(sectionJson); + sectionJson.addProperty("sectionX", section.sectionX()); + sectionJson.addProperty("sectionZ", section.sectionX()); + sectionJson.addProperty("order", section.order()); + + final JsonArray coordinates = new JsonArray(); + sectionJson.add("coordinates", coordinates); + + final ChunkQueue.UnloadSection actualSection = this.unloadQueue.getSectionUnsynchronized(section.sectionX(), section.sectionZ()); + for (final LongIterator iterator = actualSection.chunks.iterator(); iterator.hasNext();) { + final long coordinate = iterator.nextLong(); + + final JsonObject coordinateJson = new JsonObject(); + coordinates.add(coordinateJson); + + coordinateJson.addProperty("chunkX", Integer.valueOf(CoordinateUtils.getChunkX(coordinate))); + coordinateJson.addProperty("chunkZ", Integer.valueOf(CoordinateUtils.getChunkZ(coordinate))); + } + } + + final JsonArray holders = new JsonArray(); + ret.add("chunkholders", holders); + + for (final NewChunkHolder holder : this.getChunkHolders()) { + holders.add(holder.getDebugJson()); + } + + // TODO + /* + final JsonArray removeTickToChunkExpireTicketCount = new JsonArray(); + ret.add("remove_tick_to_chunk_expire_ticket_count", removeTickToChunkExpireTicketCount); + + for (final Long2ObjectMap.Entry tickEntry : this.removeTickToChunkExpireTicketCount.long2ObjectEntrySet()) { + final long tick = tickEntry.getLongKey(); + final Long2IntOpenHashMap coordinateToCount = tickEntry.getValue(); + + final JsonObject tickJson = new JsonObject(); + removeTickToChunkExpireTicketCount.add(tickJson); + + tickJson.addProperty("tick", Long.valueOf(tick)); + + final JsonArray tickEntries = new JsonArray(); + tickJson.add("entries", tickEntries); + + for (final Long2IntMap.Entry entry : coordinateToCount.long2IntEntrySet()) { + final long coordinate = entry.getLongKey(); + final int count = entry.getIntValue(); + + final JsonObject entryJson = new JsonObject(); + tickEntries.add(entryJson); + + entryJson.addProperty("chunkX", Long.valueOf(CoordinateUtils.getChunkX(coordinate))); + entryJson.addProperty("chunkZ", Long.valueOf(CoordinateUtils.getChunkZ(coordinate))); + entryJson.addProperty("count", Integer.valueOf(count)); + } + } + + final JsonArray allTicketsJson = new JsonArray(); + ret.add("tickets", allTicketsJson); + + for (final Long2ObjectMap.Entry>> coordinateTickets : this.tickets.long2ObjectEntrySet()) { + final long coordinate = coordinateTickets.getLongKey(); + final SortedArraySet> tickets = coordinateTickets.getValue(); + + final JsonObject coordinateJson = new JsonObject(); + allTicketsJson.add(coordinateJson); + + coordinateJson.addProperty("chunkX", Long.valueOf(CoordinateUtils.getChunkX(coordinate))); + coordinateJson.addProperty("chunkZ", Long.valueOf(CoordinateUtils.getChunkZ(coordinate))); + + final JsonArray ticketsSerialized = new JsonArray(); + coordinateJson.add("tickets", ticketsSerialized); + + for (final Ticket ticket : tickets) { + final JsonObject ticketSerialized = new JsonObject(); + ticketsSerialized.add(ticketSerialized); + + ticketSerialized.addProperty("type", ticket.getType().toString()); + ticketSerialized.addProperty("level", Integer.valueOf(ticket.getTicketLevel())); + ticketSerialized.addProperty("identifier", Objects.toString(ticket.key)); + ticketSerialized.addProperty("remove_tick", Long.valueOf(ticket.removalTick)); + } + } + */ + + return ret; + } + + public JsonObject getDebugJson() { + return this.getDebugJsonNoLock(); // Folia - use area based lock to reduce contention + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java new file mode 100644 index 0000000000000000000000000000000000000000..86e618586d2ad9d843ad761b7336bb3073ed4c23 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLightTask.java @@ -0,0 +1,181 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.starlight.common.light.StarLightEngine; +import ca.spottedleaf.starlight.common.light.StarLightInterface; +import io.papermc.paper.chunk.system.light.LightQueue; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.ProtoChunk; +import org.apache.logging.log4j.LogManager; +import org.apache.logging.log4j.Logger; +import java.util.function.BooleanSupplier; + +public final class ChunkLightTask extends ChunkProgressionTask { + + private static final Logger LOGGER = LogManager.getLogger(); + + protected final ChunkAccess fromChunk; + + private final LightTaskPriorityHolder priorityHolder; + + public ChunkLightTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ, + final ChunkAccess chunk, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ); + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.priorityHolder = new LightTaskPriorityHolder(priority, this); + this.fromChunk = chunk; + } + + @Override + public boolean isScheduled() { + return this.priorityHolder.isScheduled(); + } + + @Override + public ChunkStatus getTargetStatus() { + return ChunkStatus.LIGHT; + } + + @Override + public void schedule() { + this.priorityHolder.schedule(); + } + + @Override + public void cancel() { + this.priorityHolder.cancel(); + } + + @Override + public PrioritisedExecutor.Priority getPriority() { + return this.priorityHolder.getPriority(); + } + + @Override + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + this.priorityHolder.raisePriority(priority); + } + + @Override + public void setPriority(final PrioritisedExecutor.Priority priority) { + this.priorityHolder.setPriority(priority); + } + + @Override + public void raisePriority(final PrioritisedExecutor.Priority priority) { + this.priorityHolder.raisePriority(priority); + } + + private static final class LightTaskPriorityHolder extends PriorityHolder { + + protected final ChunkLightTask task; + + protected LightTaskPriorityHolder(final PrioritisedExecutor.Priority priority, final ChunkLightTask task) { + super(priority); + this.task = task; + } + + @Override + protected void cancelScheduled() { + final ChunkLightTask task = this.task; + task.complete(null, null); + } + + @Override + protected PrioritisedExecutor.Priority getScheduledPriority() { + final ChunkLightTask task = this.task; + return task.world.getChunkSource().getLightEngine().theLightEngine.lightQueue.getPriority(task.chunkX, task.chunkZ); + } + + @Override + protected void scheduleTask(final PrioritisedExecutor.Priority priority) { + final ChunkLightTask task = this.task; + final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; + final LightQueue lightQueue = starLightInterface.lightQueue; + lightQueue.queueChunkLightTask(new ChunkPos(task.chunkX, task.chunkZ), new LightTask(starLightInterface, task), priority); + lightQueue.setPriority(task.chunkX, task.chunkZ, priority); + } + + @Override + protected void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority) { + final ChunkLightTask task = this.task; + final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; + final LightQueue lightQueue = starLightInterface.lightQueue; + lightQueue.lowerPriority(task.chunkX, task.chunkZ, priority); + } + + @Override + protected void setPriorityScheduled(final PrioritisedExecutor.Priority priority) { + final ChunkLightTask task = this.task; + final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; + final LightQueue lightQueue = starLightInterface.lightQueue; + lightQueue.setPriority(task.chunkX, task.chunkZ, priority); + } + + @Override + protected void raisePriorityScheduled(final PrioritisedExecutor.Priority priority) { + final ChunkLightTask task = this.task; + final StarLightInterface starLightInterface = task.world.getChunkSource().getLightEngine().theLightEngine; + final LightQueue lightQueue = starLightInterface.lightQueue; + lightQueue.raisePriority(task.chunkX, task.chunkZ, priority); + } + } + + private static final class LightTask implements BooleanSupplier { + + protected final StarLightInterface lightEngine; + protected final ChunkLightTask task; + + public LightTask(final StarLightInterface lightEngine, final ChunkLightTask task) { + this.lightEngine = lightEngine; + this.task = task; + } + + @Override + public boolean getAsBoolean() { + final ChunkLightTask task = this.task; + // executed on light thread + if (!task.priorityHolder.markExecuting()) { + // cancelled + return false; + } + + try { + final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(task.fromChunk); + + if (task.fromChunk.isLightCorrect() && task.fromChunk.getStatus().isOrAfter(ChunkStatus.LIGHT)) { + this.lightEngine.forceLoadInChunk(task.fromChunk, emptySections); + this.lightEngine.checkChunkEdges(task.chunkX, task.chunkZ); + } else { + task.fromChunk.setLightCorrect(false); + this.lightEngine.lightChunk(task.fromChunk, emptySections); + task.fromChunk.setLightCorrect(true); + } + // we need to advance status + if (task.fromChunk instanceof ProtoChunk chunk && chunk.getStatus() == ChunkStatus.LIGHT.getParent()) { + chunk.setStatus(ChunkStatus.LIGHT); + } + } catch (final Throwable thr) { + if (!(thr instanceof ThreadDeath)) { + LOGGER.fatal("Failed to light chunk " + task.fromChunk.getPos().toString() + " in world '" + this.lightEngine.getWorld().getWorld().getName() + "'", thr); + } + + task.complete(null, thr); + + if (thr instanceof ThreadDeath) { + throw (ThreadDeath)thr; + } + + return true; + } + + task.complete(task.fromChunk, null); + return true; + } + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java new file mode 100644 index 0000000000000000000000000000000000000000..5ff994d5af24b0bdd7b3a16e245b2c4100bef3f0 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkLoadTask.java @@ -0,0 +1,484 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import ca.spottedleaf.dataconverter.minecraft.MCDataConverter; +import ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry; +import com.mojang.logging.LogUtils; +import io.papermc.paper.chunk.system.io.RegionFileIOThread; +import io.papermc.paper.chunk.system.poi.PoiChunk; +import net.minecraft.SharedConstants; +import net.minecraft.core.registries.Registries; +import net.minecraft.nbt.CompoundTag; +import net.minecraft.server.level.ChunkMap; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.ProtoChunk; +import net.minecraft.world.level.chunk.UpgradeData; +import net.minecraft.world.level.chunk.storage.ChunkSerializer; +import net.minecraft.world.level.chunk.storage.EntityStorage; +import net.minecraft.world.level.levelgen.blending.BlendingData; +import org.slf4j.Logger; +import java.lang.invoke.VarHandle; +import java.util.Map; +import java.util.concurrent.atomic.AtomicInteger; +import java.util.function.Consumer; + +public final class ChunkLoadTask extends ChunkProgressionTask { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + private final NewChunkHolder chunkHolder; + private final ChunkDataLoadTask loadTask; + + private volatile boolean cancelled; + private NewChunkHolder.GenericDataLoadTaskCallback entityLoadTask; + private NewChunkHolder.GenericDataLoadTaskCallback poiLoadTask; + private GenericDataLoadTask.TaskResult loadResult; + private final AtomicInteger taskCountToComplete = new AtomicInteger(3); // one for poi, one for entity, and one for chunk data + + protected ChunkLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ, + final NewChunkHolder chunkHolder, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ); + this.chunkHolder = chunkHolder; + this.loadTask = new ChunkDataLoadTask(scheduler, world, chunkX, chunkZ, priority); + this.loadTask.addCallback((final GenericDataLoadTask.TaskResult result) -> { + ChunkLoadTask.this.loadResult = result; // must be before getAndDecrement + ChunkLoadTask.this.tryCompleteLoad(); + }); + } + + private void tryCompleteLoad() { + if (this.taskCountToComplete.decrementAndGet() == 0) { + final GenericDataLoadTask.TaskResult result = this.cancelled ? null : this.loadResult; // only after the getAndDecrement + ChunkLoadTask.this.complete(result == null ? null : result.left(), result == null ? null : result.right()); + } + } + + @Override + public ChunkStatus getTargetStatus() { + return ChunkStatus.EMPTY; + } + + private boolean scheduled; + + @Override + public boolean isScheduled() { + return this.scheduled; + } + + @Override + public void schedule() { + final NewChunkHolder.GenericDataLoadTaskCallback entityLoadTask; + final NewChunkHolder.GenericDataLoadTaskCallback poiLoadTask; + + final Consumer> scheduleLoadTask = (final GenericDataLoadTask.TaskResult result) -> { + ChunkLoadTask.this.tryCompleteLoad(); + }; + + // NOTE: it is IMPOSSIBLE for getOrLoadEntityData/getOrLoadPoiData to complete synchronously, because + // they must schedule a task to off main or to on main to complete + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + if (this.scheduled) { + throw new IllegalStateException("schedule() called twice"); + } + this.scheduled = true; + if (this.cancelled) { + return; + } + if (!this.chunkHolder.isEntityChunkNBTLoaded()) { + entityLoadTask = this.chunkHolder.getOrLoadEntityData((Consumer)scheduleLoadTask); + } else { + entityLoadTask = null; + this.taskCountToComplete.getAndDecrement(); // we know the chunk load is not done here, as it is not scheduled + } + + if (!this.chunkHolder.isPoiChunkLoaded()) { + poiLoadTask = this.chunkHolder.getOrLoadPoiData((Consumer)scheduleLoadTask); + } else { + poiLoadTask = null; + this.taskCountToComplete.getAndDecrement(); // we know the chunk load is not done here, as it is not scheduled + } + + this.entityLoadTask = entityLoadTask; + this.poiLoadTask = poiLoadTask; + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + + if (entityLoadTask != null) { + entityLoadTask.schedule(); + } + + if (poiLoadTask != null) { + poiLoadTask.schedule(); + } + + this.loadTask.schedule(false); + } + + @Override + public void cancel() { + // must be before load task access, so we can synchronise with the writes to the fields + final boolean scheduled; + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + // must read field here, as it may be written later conucrrently - + // we need to know if we scheduled _before_ cancellation + scheduled = this.scheduled; + this.cancelled = true; + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + + /* + Note: The entityLoadTask/poiLoadTask do not complete when cancelled, + so we need to manually try to complete in those cases + It is also important to note that we set the cancelled field first, just in case + the chunk load task attempts to complete with a non-null value + */ + + if (scheduled) { + // since we scheduled, we need to cancel the tasks + if (this.entityLoadTask != null) { + if (this.entityLoadTask.cancel()) { + this.tryCompleteLoad(); + } + } + if (this.poiLoadTask != null) { + if (this.poiLoadTask.cancel()) { + this.tryCompleteLoad(); + } + } + } else { + // since nothing was scheduled, we need to decrement the task count here ourselves + + // for entity load task + this.tryCompleteLoad(); + + // for poi load task + this.tryCompleteLoad(); + } + this.loadTask.cancel(); + } + + @Override + public PrioritisedExecutor.Priority getPriority() { + return this.loadTask.getPriority(); + } + + @Override + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask(); + if (entityLoad != null) { + entityLoad.lowerPriority(priority); + } + + final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask(); + + if (poiLoad != null) { + poiLoad.lowerPriority(priority); + } + + this.loadTask.lowerPriority(priority); + } + + @Override + public void setPriority(final PrioritisedExecutor.Priority priority) { + final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask(); + if (entityLoad != null) { + entityLoad.setPriority(priority); + } + + final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask(); + + if (poiLoad != null) { + poiLoad.setPriority(priority); + } + + this.loadTask.setPriority(priority); + } + + @Override + public void raisePriority(final PrioritisedExecutor.Priority priority) { + final EntityDataLoadTask entityLoad = this.chunkHolder.getEntityDataLoadTask(); + if (entityLoad != null) { + entityLoad.raisePriority(priority); + } + + final PoiDataLoadTask poiLoad = this.chunkHolder.getPoiDataLoadTask(); + + if (poiLoad != null) { + poiLoad.raisePriority(priority); + } + + this.loadTask.raisePriority(priority); + } + + protected static abstract class CallbackDataLoadTask extends GenericDataLoadTask { + + private TaskResult result; + private final MultiThreadedQueue>> waiters = new MultiThreadedQueue<>(); + + protected volatile boolean completed; + protected static final VarHandle COMPLETED_HANDLE = ConcurrentUtil.getVarHandle(CallbackDataLoadTask.class, "completed", boolean.class); + + protected CallbackDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, + final int chunkZ, final RegionFileIOThread.RegionFileType type, + final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ, type, priority); + } + + public void addCallback(final Consumer> consumer) { + if (!this.waiters.add(consumer)) { + try { + consumer.accept(this.result); + } catch (final Throwable throwable) { + this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Consumer", ChunkTaskScheduler.stringIfNull(consumer), + "Completed throwable", ChunkTaskScheduler.stringIfNull(this.result.right()) + ), throwable); + if (throwable instanceof ThreadDeath) { + throw (ThreadDeath)throwable; + } + } + } + } + + @Override + protected void onComplete(final TaskResult result) { + if ((boolean)COMPLETED_HANDLE.getAndSet((CallbackDataLoadTask)this, (boolean)true)) { + throw new IllegalStateException("Already completed"); + } + this.result = result; + Consumer> consumer; + while ((consumer = this.waiters.pollOrBlockAdds()) != null) { + try { + consumer.accept(result); + } catch (final Throwable throwable) { + this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Consumer", ChunkTaskScheduler.stringIfNull(consumer), + "Completed throwable", ChunkTaskScheduler.stringIfNull(result.right()) + ), throwable); + if (throwable instanceof ThreadDeath) { + throw (ThreadDeath)throwable; + } + return; + } + } + } + } + + public static final class ChunkDataLoadTask extends CallbackDataLoadTask { + protected ChunkDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, + final int chunkZ, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.CHUNK_DATA, priority); + } + + @Override + protected boolean hasOffMain() { + return true; + } + + @Override + protected boolean hasOnMain() { + return false; + } + + @Override + protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) { + return this.scheduler.loadExecutor.createTask(run, priority); + } + + @Override + protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) { + throw new UnsupportedOperationException(); + } + + @Override + protected TaskResult completeOnMainOffMain(final ChunkAccess data, final Throwable throwable) { + throw new UnsupportedOperationException(); + } + + private ProtoChunk getEmptyChunk() { + return new ProtoChunk( + new ChunkPos(this.chunkX, this.chunkZ), UpgradeData.EMPTY, this.world, + this.world.registryAccess().registryOrThrow(Registries.BIOME), (BlendingData)null + ); + } + + @Override + protected TaskResult runOffMain(final CompoundTag data, final Throwable throwable) { + if (throwable != null) { + LOGGER.error("Failed to load chunk data for task: " + this.toString() + ", chunk data will be lost", throwable); + return new TaskResult<>(this.getEmptyChunk(), null); + } + + if (data == null) { + return new TaskResult<>(this.getEmptyChunk(), null); + } + + // need to convert data, and then deserialize it + + try { + final ChunkPos chunkPos = new ChunkPos(this.chunkX, this.chunkZ); + final ChunkMap chunkMap = this.world.getChunkSource().chunkMap; + // run converters + // note: upgradeChunkTag copies the data already + final CompoundTag converted = chunkMap.upgradeChunkTag( + this.world.getTypeKey(), chunkMap.overworldDataStorage, data, chunkMap.generator.getTypeNameForDataFixer(), + chunkPos, this.world + ); + // deserialize + final ChunkSerializer.InProgressChunkHolder chunkHolder = ChunkSerializer.readInProgressChunkHolder( + this.world, chunkMap.getPoiManager(), chunkPos, converted + ); + + return new TaskResult<>(chunkHolder.protoChunk, null); + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr2) { + LOGGER.error("Failed to parse chunk data for task: " + this.toString() + ", chunk data will be lost", thr2); + return new TaskResult<>(this.getEmptyChunk(), null); + } + } + + @Override + protected TaskResult runOnMain(final ChunkAccess data, final Throwable throwable) { + throw new UnsupportedOperationException(); + } + } + + public static final class PoiDataLoadTask extends CallbackDataLoadTask { + public PoiDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, + final int chunkZ, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.POI_DATA, priority); + } + + @Override + protected boolean hasOffMain() { + return true; + } + + @Override + protected boolean hasOnMain() { + return false; + } + + @Override + protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) { + return this.scheduler.loadExecutor.createTask(run, priority); + } + + @Override + protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) { + throw new UnsupportedOperationException(); + } + + @Override + protected TaskResult completeOnMainOffMain(final PoiChunk data, final Throwable throwable) { + throw new UnsupportedOperationException(); + } + + @Override + protected TaskResult runOffMain(CompoundTag data, final Throwable throwable) { + if (throwable != null) { + LOGGER.error("Failed to load poi data for task: " + this.toString() + ", poi data will be lost", throwable); + return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null); + } + + if (data == null || data.isEmpty()) { + // nothing to do + return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null); + } + + try { + data = data.copy(); // coming from the I/O thread, so we need to copy + // run converters + final int dataVersion = !data.contains(SharedConstants.DATA_VERSION_TAG, net.minecraft.nbt.Tag.TAG_ANY_NUMERIC) ? 1945 : data.getInt(SharedConstants.DATA_VERSION_TAG); + final CompoundTag converted = MCDataConverter.convertTag( + MCTypeRegistry.POI_CHUNK, data, dataVersion, SharedConstants.getCurrentVersion().getDataVersion().getVersion() + ); + + // now we need to parse it + return new TaskResult<>(PoiChunk.parse(this.world, this.chunkX, this.chunkZ, converted), null); + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr2) { + LOGGER.error("Failed to run parse poi data for task: " + this.toString() + ", poi data will be lost", thr2); + return new TaskResult<>(PoiChunk.empty(this.world, this.chunkX, this.chunkZ), null); + } + } + + @Override + protected TaskResult runOnMain(final PoiChunk data, final Throwable throwable) { + throw new UnsupportedOperationException(); + } + } + + public static final class EntityDataLoadTask extends CallbackDataLoadTask { + + public EntityDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, + final int chunkZ, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ, RegionFileIOThread.RegionFileType.ENTITY_DATA, priority); + } + + @Override + protected boolean hasOffMain() { + return true; + } + + @Override + protected boolean hasOnMain() { + return false; + } + + @Override + protected PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority) { + return this.scheduler.loadExecutor.createTask(run, priority); + } + + @Override + protected PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority) { + throw new UnsupportedOperationException(); + } + + @Override + protected TaskResult completeOnMainOffMain(final CompoundTag data, final Throwable throwable) { + throw new UnsupportedOperationException(); + } + + @Override + protected TaskResult runOffMain(final CompoundTag data, final Throwable throwable) { + if (throwable != null) { + LOGGER.error("Failed to load entity data for task: " + this.toString() + ", entity data will be lost", throwable); + return new TaskResult<>(null, null); + } + + if (data == null || data.isEmpty()) { + // nothing to do + return new TaskResult<>(null, null); + } + + try { + // note: data comes from the I/O thread, so we need to copy it + return new TaskResult<>(EntityStorage.upgradeChunkTag(data.copy()), null); + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr2) { + LOGGER.error("Failed to run converters for entity data for task: " + this.toString() + ", entity data will be lost", thr2); + return new TaskResult<>(null, thr2); + } + } + + @Override + protected TaskResult runOnMain(final CompoundTag data, final Throwable throwable) { + throw new UnsupportedOperationException(); + } + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java new file mode 100644 index 0000000000000000000000000000000000000000..b2341328bb22f08836ef18785dc27393a36ce8d6 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkProgressionTask.java @@ -0,0 +1,105 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import java.lang.invoke.VarHandle; +import java.util.Map; +import java.util.function.BiConsumer; + +public abstract class ChunkProgressionTask { + + private final MultiThreadedQueue> waiters = new MultiThreadedQueue<>(); + private ChunkAccess completedChunk; + private Throwable completedThrowable; + + protected final ChunkTaskScheduler scheduler; + protected final ServerLevel world; + protected final int chunkX; + protected final int chunkZ; + + protected volatile boolean completed; + protected static final VarHandle COMPLETED_HANDLE = ConcurrentUtil.getVarHandle(ChunkProgressionTask.class, "completed", boolean.class); + + protected ChunkProgressionTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, final int chunkZ) { + this.scheduler = scheduler; + this.world = world; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + } + + // Used only for debug json + public abstract boolean isScheduled(); + + // Note: It is the responsibility of the task to set the chunk's status once it has completed + public abstract ChunkStatus getTargetStatus(); + + /* Only executed once */ + /* Implementations must be prepared to handle cases where cancel() is called before schedule() */ + public abstract void schedule(); + + /* May be called multiple times */ + public abstract void cancel(); + + public abstract PrioritisedExecutor.Priority getPriority(); + + /* Schedule lock is always held for the priority update calls */ + + public abstract void lowerPriority(final PrioritisedExecutor.Priority priority); + + public abstract void setPriority(final PrioritisedExecutor.Priority priority); + + public abstract void raisePriority(final PrioritisedExecutor.Priority priority); + + public final void onComplete(final BiConsumer onComplete) { + if (!this.waiters.add(onComplete)) { + try { + onComplete.accept(this.completedChunk, this.completedThrowable); + } catch (final Throwable throwable) { + this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Consumer", ChunkTaskScheduler.stringIfNull(onComplete), + "Completed throwable", ChunkTaskScheduler.stringIfNull(this.completedThrowable) + ), throwable); + if (throwable instanceof ThreadDeath) { + throw (ThreadDeath)throwable; + } + } + } + } + + protected final void complete(final ChunkAccess chunk, final Throwable throwable) { + try { + this.complete0(chunk, throwable); + } catch (final Throwable thr2) { + this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Completed throwable", ChunkTaskScheduler.stringIfNull(throwable) + ), thr2); + if (thr2 instanceof ThreadDeath) { + throw (ThreadDeath)thr2; + } + } + } + + private void complete0(final ChunkAccess chunk, final Throwable throwable) { + if ((boolean)COMPLETED_HANDLE.getAndSet((ChunkProgressionTask)this, (boolean)true)) { + throw new IllegalStateException("Already completed"); + } + this.completedChunk = chunk; + this.completedThrowable = throwable; + + BiConsumer consumer; + while ((consumer = this.waiters.pollOrBlockAdds()) != null) { + consumer.accept(chunk, throwable); + } + } + + @Override + public String toString() { + return "ChunkProgressionTask{class: " + this.getClass().getName() + ", for world: " + this.world.getWorld().getName() + + ", chunk: (" + this.chunkX + "," + this.chunkZ + "), hashcode: " + System.identityHashCode(this) + ", priority: " + this.getPriority() + + ", status: " + this.getTargetStatus().toString() + ", scheduled: " + this.isScheduled() + "}"; + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java new file mode 100644 index 0000000000000000000000000000000000000000..4cc1b3ba6d093a9683dbd8b7fe76106ae391e019 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkQueue.java @@ -0,0 +1,160 @@ +package io.papermc.paper.chunk.system.scheduling; + +import it.unimi.dsi.fastutil.HashCommon; +import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet; +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.atomic.AtomicLong; + +public final class ChunkQueue { + + public final int coordinateShift; + private final AtomicLong orderGenerator = new AtomicLong(); + private final ConcurrentHashMap unloadSections = new ConcurrentHashMap<>(); + + /* + * Note: write operations do not occur in parallel for any given section. + * Note: coordinateShift <= region shift in order for retrieveForCurrentRegion() to function correctly + */ + + public ChunkQueue(final int coordinateShift) { + this.coordinateShift = coordinateShift; + } + + public static record SectionToUnload(int sectionX, int sectionZ, Coordinate coord, long order, int count) {} + + public List retrieveForAllRegions() { + final List ret = new ArrayList<>(); + + for (final Map.Entry entry : this.unloadSections.entrySet()) { + final Coordinate coord = entry.getKey(); + final long key = coord.key; + final UnloadSection section = entry.getValue(); + final int sectionX = Coordinate.x(key); + final int sectionZ = Coordinate.z(key); + + ret.add(new SectionToUnload(sectionX, sectionZ, coord, section.order, section.chunks.size())); + } + + ret.sort((final SectionToUnload s1, final SectionToUnload s2) -> { + return Long.compare(s1.order, s2.order); + }); + + return ret; + } + + public UnloadSection getSectionUnsynchronized(final int sectionX, final int sectionZ) { + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + return this.unloadSections.get(coordinate); + } + + public UnloadSection removeSection(final int sectionX, final int sectionZ) { + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + return this.unloadSections.remove(coordinate); + } + + // write operation + public boolean addChunk(final int chunkX, final int chunkZ) { + final int shift = this.coordinateShift; + final int sectionX = chunkX >> shift; + final int sectionZ = chunkZ >> shift; + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + final long chunkKey = Coordinate.key(chunkX, chunkZ); + + UnloadSection section = this.unloadSections.get(coordinate); + if (section == null) { + section = new UnloadSection(this.orderGenerator.getAndIncrement()); + // write operations do not occur in parallel for a given section + this.unloadSections.put(coordinate, section); + } + + return section.chunks.add(chunkKey); + } + + // write operation + public boolean removeChunk(final int chunkX, final int chunkZ) { + final int shift = this.coordinateShift; + final int sectionX = chunkX >> shift; + final int sectionZ = chunkZ >> shift; + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + final long chunkKey = Coordinate.key(chunkX, chunkZ); + + final UnloadSection section = this.unloadSections.get(coordinate); + + if (section == null) { + return false; + } + + if (!section.chunks.remove(chunkKey)) { + return false; + } + + if (section.chunks.isEmpty()) { + this.unloadSections.remove(coordinate); + } + + return true; + } + + public static final class UnloadSection { + + public final long order; + public final LongLinkedOpenHashSet chunks = new LongLinkedOpenHashSet(); + + public UnloadSection(final long order) { + this.order = order; + } + } + + private static final class Coordinate implements Comparable { + + public final long key; + + public Coordinate(final long key) { + this.key = key; + } + + public Coordinate(final int x, final int z) { + this.key = key(x, z); + } + + public static long key(final int x, final int z) { + return ((long)z << 32) | (x & 0xFFFFFFFFL); + } + + public static int x(final long key) { + return (int)key; + } + + public static int z(final long key) { + return (int)(key >>> 32); + } + + @Override + public int hashCode() { + return (int)HashCommon.mix(this.key); + } + + @Override + public boolean equals(final Object obj) { + if (this == obj) { + return true; + } + + if (!(obj instanceof Coordinate other)) { + return false; + } + + return this.key == other.key; + } + + // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain + // is too large. So we should implement compareTo to help. + @Override + public int compareTo(final Coordinate other) { + return Long.compare(this.key, other.key); + } + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java new file mode 100644 index 0000000000000000000000000000000000000000..049e20407033073b06fcdeb46c38485f4926d778 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkTaskScheduler.java @@ -0,0 +1,883 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadedTaskQueue; +import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import com.mojang.logging.LogUtils; +import io.papermc.paper.chunk.system.io.RegionFileIOThread; +import io.papermc.paper.chunk.system.scheduling.queue.RadiusAwarePrioritisedExecutor; +import io.papermc.paper.configuration.GlobalConfiguration; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import java.util.function.BooleanSupplier; +import net.minecraft.CrashReport; +import net.minecraft.CrashReportCategory; +import net.minecraft.ReportedException; +import io.papermc.paper.util.MCUtil; +import net.minecraft.server.MinecraftServer; +import net.minecraft.server.level.ChunkMap; +import net.minecraft.server.level.FullChunkStatus; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.TicketType; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.LevelChunk; +import org.bukkit.Bukkit; +import org.slf4j.Logger; +import java.io.File; +import java.util.ArrayDeque; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; +import java.util.function.Consumer; + +public final class ChunkTaskScheduler { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + static int newChunkSystemIOThreads; + static int newChunkSystemWorkerThreads; + static int newChunkSystemGenParallelism; + static int newChunkSystemLoadParallelism; + + public static ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool workerThreads; + + private static boolean initialised = false; + + public static void init(final GlobalConfiguration.ChunkSystem config) { + if (initialised) { + return; + } + initialised = true; + newChunkSystemIOThreads = config.ioThreads; + newChunkSystemWorkerThreads = config.workerThreads; + if (newChunkSystemIOThreads < 0) { + newChunkSystemIOThreads = 1; + } else { + newChunkSystemIOThreads = Math.max(1, newChunkSystemIOThreads); + } + int defaultWorkerThreads = Runtime.getRuntime().availableProcessors() / 2; + if (defaultWorkerThreads <= 4) { + defaultWorkerThreads = defaultWorkerThreads <= 3 ? 1 : 2; + } else { + defaultWorkerThreads = defaultWorkerThreads / 2; + } + defaultWorkerThreads = Integer.getInteger("Paper.WorkerThreadCount", Integer.valueOf(defaultWorkerThreads)); + + if (newChunkSystemWorkerThreads < 0) { + newChunkSystemWorkerThreads = defaultWorkerThreads; + } else { + newChunkSystemWorkerThreads = Math.max(1, newChunkSystemWorkerThreads); + } + + String newChunkSystemGenParallelism = config.genParallelism; + if (newChunkSystemGenParallelism.equalsIgnoreCase("default")) { + newChunkSystemGenParallelism = "true"; + } + boolean useParallelGen; + if (newChunkSystemGenParallelism.equalsIgnoreCase("on") || newChunkSystemGenParallelism.equalsIgnoreCase("enabled") + || newChunkSystemGenParallelism.equalsIgnoreCase("true")) { + useParallelGen = true; + } else if (newChunkSystemGenParallelism.equalsIgnoreCase("off") || newChunkSystemGenParallelism.equalsIgnoreCase("disabled") + || newChunkSystemGenParallelism.equalsIgnoreCase("false")) { + useParallelGen = false; + } else { + throw new IllegalStateException("Invalid option for gen-parallelism: must be one of [on, off, enabled, disabled, true, false, default]"); + } + + ChunkTaskScheduler.newChunkSystemGenParallelism = useParallelGen ? newChunkSystemWorkerThreads : 1; + ChunkTaskScheduler.newChunkSystemLoadParallelism = newChunkSystemWorkerThreads; + + RegionFileIOThread.init(newChunkSystemIOThreads); + workerThreads = new ca.spottedleaf.concurrentutil.executor.standard.PrioritisedThreadPool( + "Paper Chunk System Worker Pool", newChunkSystemWorkerThreads, + (final Thread thread, final Integer id) -> { + thread.setPriority(Thread.NORM_PRIORITY - 2); + thread.setName("Tuinity Chunk System Worker #" + id.intValue()); + thread.setUncaughtExceptionHandler(io.papermc.paper.chunk.system.scheduling.NewChunkHolder.CHUNKSYSTEM_UNCAUGHT_EXCEPTION_HANDLER); + }, (long)(20.0e6)); // 20ms + + LOGGER.info("Chunk system is using " + newChunkSystemIOThreads + " I/O threads, " + newChunkSystemWorkerThreads + " worker threads, and gen parallelism of " + ChunkTaskScheduler.newChunkSystemGenParallelism + " threads"); + } + + public final ServerLevel world; + public final PrioritisedThreadPool workers; + public final RadiusAwarePrioritisedExecutor radiusAwareScheduler; + public final PrioritisedThreadPool.PrioritisedPoolExecutor parallelGenExecutor; + private final PrioritisedThreadPool.PrioritisedPoolExecutor radiusAwareGenExecutor; + public final PrioritisedThreadPool.PrioritisedPoolExecutor loadExecutor; + + private final PrioritisedThreadedTaskQueue mainThreadExecutor = new PrioritisedThreadedTaskQueue(); + + public final ChunkHolderManager chunkHolderManager; + + static { + ChunkStatus.EMPTY.writeRadius = 0; + ChunkStatus.STRUCTURE_STARTS.writeRadius = 0; + ChunkStatus.STRUCTURE_REFERENCES.writeRadius = 0; + ChunkStatus.BIOMES.writeRadius = 0; + ChunkStatus.NOISE.writeRadius = 0; + ChunkStatus.SURFACE.writeRadius = 0; + ChunkStatus.CARVERS.writeRadius = 0; + ChunkStatus.FEATURES.writeRadius = 1; + ChunkStatus.INITIALIZE_LIGHT.writeRadius = 0; + ChunkStatus.LIGHT.writeRadius = 2; + ChunkStatus.SPAWN.writeRadius = 0; + ChunkStatus.FULL.writeRadius = 0; + + /* + It's important that the neighbour read radius is taken into account. If _any_ later status is using some chunk as + a neighbour, it must be also safe if that neighbour is being generated. i.e for any status later than FEATURES, + for a status to be parallel safe it must not read the block data from its neighbours. + */ + final List parallelCapableStatus = Arrays.asList( + // No-op executor. + ChunkStatus.EMPTY, + + // This is parallel capable, as CB has fixed the concurrency issue with stronghold generations. + // Does not touch neighbour chunks. + ChunkStatus.STRUCTURE_STARTS, + + // Surprisingly this is parallel capable. It is simply reading the already-created structure starts + // into the structure references for the chunk. So while it reads from it neighbours, its neighbours + // will not change, even if executed in parallel. + ChunkStatus.STRUCTURE_REFERENCES, + + // Safe. Mojang runs it in parallel as well. + ChunkStatus.BIOMES, + + // Safe. Mojang runs it in parallel as well. + ChunkStatus.NOISE, + + // Parallel safe. Only touches the target chunk. Biome retrieval is now noise based, which is + // completely thread-safe. + ChunkStatus.SURFACE, + + // No global state is modified in the carvers. It only touches the specified chunk. So it is parallel safe. + ChunkStatus.CARVERS, + + // FEATURES is not parallel safe. It writes to neighbours. + + // no-op executor + ChunkStatus.INITIALIZE_LIGHT + + // LIGHT is not parallel safe. It also doesn't run on the generation executor, so no point. + + // Only writes to the specified chunk. State is not read by later statuses. Parallel safe. + // Note: it may look unsafe because it writes to a worldgenregion, but the region size is always 0 - + // see the task margin. + // However, if the neighbouring FEATURES chunk is unloaded, but then fails to load in again (for whatever + // reason), then it would write to this chunk - and since this status reads blocks from itself, it's not + // safe to execute this in parallel. + // SPAWN + + // FULL is executed on main. + ); + + for (final ChunkStatus status : parallelCapableStatus) { + status.isParallelCapable = true; + } + } + + private static final int[] ACCESS_RADIUS_TABLE = new int[ChunkStatus.getStatusList().size()]; + private static final int[] MAX_ACCESS_RADIUS_TABLE = new int[ACCESS_RADIUS_TABLE.length]; + static { + Arrays.fill(ACCESS_RADIUS_TABLE, -1); + } + + private static int getAccessRadius0(final ChunkStatus genStatus) { + if (genStatus == ChunkStatus.EMPTY) { + return 0; + } + + final int radius = Math.max(genStatus.loadRange, genStatus.getRange()); + int maxRange = radius; + + for (int dist = 1; dist <= radius; ++dist) { + final ChunkStatus requiredNeighbourStatus = ChunkMap.getDependencyStatus(genStatus, radius); + final int rad = ACCESS_RADIUS_TABLE[requiredNeighbourStatus.getIndex()]; + if (rad == -1) { + throw new IllegalStateException(); + } + + maxRange = Math.max(maxRange, dist + rad); + } + + return maxRange; + } + + private static int maxAccessRadius; + + static { + final List statuses = ChunkStatus.getStatusList(); + for (int i = 0, len = statuses.size(); i < len; ++i) { + ACCESS_RADIUS_TABLE[i] = getAccessRadius0(statuses.get(i)); + } + int max = 0; + for (int i = 0, len = statuses.size(); i < len; ++i) { + MAX_ACCESS_RADIUS_TABLE[i] = max = Math.max(ACCESS_RADIUS_TABLE[i], max); + } + maxAccessRadius = max; + } + + public static int getMaxAccessRadius() { + return maxAccessRadius; + } + + public static int getAccessRadius(final ChunkStatus genStatus) { + return ACCESS_RADIUS_TABLE[genStatus.getIndex()]; + } + + public static int getAccessRadius(final FullChunkStatus status) { + return (status.ordinal() - 1) + getAccessRadius(ChunkStatus.FULL); + } + + final ReentrantAreaLock schedulingLockArea; + private final int lockShift; + + public final int getChunkSystemLockShift() { + return this.lockShift; + } + // Folia end - use area based lock to reduce contention + + public ChunkTaskScheduler(final ServerLevel world, final PrioritisedThreadPool workers) { + this.world = world; + this.workers = workers; + // must be >= region shift (in paper, doesn't exist) and must be >= ticket propagator section shift + // it must be >= region shift since the regioniser assumes ticket updates do not occur in parallel for the region sections + // it must be >= ticket propagator section shift so that the ticket propagator can assume that owning a position implies owning + // the entire section + // we just take the max, as we want the smallest shift that satisfies these properties + this.lockShift = Math.max(world.getRegionChunkShift(), ThreadedTicketLevelPropagator.SECTION_SHIFT); + this.schedulingLockArea = new ReentrantAreaLock(this.getChunkSystemLockShift()); + + final String worldName = world.getWorld().getName(); + this.parallelGenExecutor = workers.createExecutor("Chunk parallel generation executor for world '" + worldName + "'", Math.max(1, newChunkSystemGenParallelism)); + this.radiusAwareGenExecutor = + newChunkSystemGenParallelism <= 1 ? this.parallelGenExecutor : workers.createExecutor("Chunk radius aware generator for world '" + worldName + "'", newChunkSystemGenParallelism); + this.loadExecutor = workers.createExecutor("Chunk load executor for world '" + worldName + "'", newChunkSystemLoadParallelism); + this.radiusAwareScheduler = new RadiusAwarePrioritisedExecutor(this.radiusAwareGenExecutor, Math.max(1, newChunkSystemGenParallelism)); + this.chunkHolderManager = new ChunkHolderManager(world, this); + } + + private final AtomicBoolean failedChunkSystem = new AtomicBoolean(); + + public static Object stringIfNull(final Object obj) { + return obj == null ? "null" : obj; + } + + public void unrecoverableChunkSystemFailure(final int chunkX, final int chunkZ, final Map objectsOfInterest, final Throwable thr) { + final NewChunkHolder holder = this.chunkHolderManager.getChunkHolder(chunkX, chunkZ); + LOGGER.error("Chunk system error at chunk (" + chunkX + "," + chunkZ + "), holder: " + holder + ", exception:", new Throwable(thr)); + + if (this.failedChunkSystem.getAndSet(true)) { + return; + } + + final ReportedException reportedException = thr instanceof ReportedException ? (ReportedException)thr : new ReportedException(new CrashReport("Chunk system error", thr)); + + CrashReportCategory crashReportCategory = reportedException.getReport().addCategory("Chunk system details"); + crashReportCategory.setDetail("Chunk coordinate", new ChunkPos(chunkX, chunkZ).toString()); + crashReportCategory.setDetail("ChunkHolder", Objects.toString(holder)); + crashReportCategory.setDetail("unrecoverableChunkSystemFailure caller thread", Thread.currentThread().getName()); + + crashReportCategory = reportedException.getReport().addCategory("Chunk System Objects of Interest"); + for (final Map.Entry entry : objectsOfInterest.entrySet()) { + if (entry.getValue() instanceof Throwable thrObject) { + crashReportCategory.setDetailError(Objects.toString(entry.getKey()), thrObject); + } else { + crashReportCategory.setDetail(Objects.toString(entry.getKey()), Objects.toString(entry.getValue())); + } + } + + final Runnable crash = () -> { + throw new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException); + }; + + // this may not be good enough, specifically thanks to stupid ass plugins swallowing exceptions + this.scheduleChunkTask(chunkX, chunkZ, crash, PrioritisedExecutor.Priority.BLOCKING); + // so, make the main thread pick it up + MinecraftServer.chunkSystemCrash = new RuntimeException("Chunk system crash propagated from unrecoverableChunkSystemFailure", reportedException); + } + + public boolean executeMainThreadTask() { + TickThread.ensureTickThread("Cannot execute main thread task off-main"); + return this.mainThreadExecutor.executeTask(); + } + + public void raisePriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { + this.chunkHolderManager.raisePriority(x, z, priority); + } + + public void setPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { + this.chunkHolderManager.setPriority(x, z, priority); + } + + public void lowerPriority(final int x, final int z, final PrioritisedExecutor.Priority priority) { + this.chunkHolderManager.lowerPriority(x, z, priority); + } + + private final AtomicLong chunkLoadCounter = new AtomicLong(); + + public void scheduleTickingState(final int chunkX, final int chunkZ, final FullChunkStatus toStatus, + final boolean addTicket, final PrioritisedExecutor.Priority priority, + final Consumer onComplete) { + if (!TickThread.isTickThread()) { + this.scheduleChunkTask(chunkX, chunkZ, () -> { + ChunkTaskScheduler.this.scheduleTickingState(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); + }, priority); + return; + } + final int accessRadius = getAccessRadius(toStatus); + if (this.chunkHolderManager.ticketLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { + throw new IllegalStateException("Cannot schedule chunk load during ticket level update"); + } + if (this.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { + throw new IllegalStateException("Cannot schedule chunk loading recursively"); + } + + if (toStatus == FullChunkStatus.INACCESSIBLE) { + throw new IllegalArgumentException("Cannot wait for INACCESSIBLE status"); + } + + final int minLevel = 33 - (toStatus.ordinal() - 1); + final Long chunkReference = addTicket ? Long.valueOf(this.chunkLoadCounter.getAndIncrement()) : null; + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + + if (addTicket) { + this.chunkHolderManager.addTicketAtLevel(TicketType.CHUNK_LOAD, chunkKey, minLevel, chunkReference); + this.chunkHolderManager.processTicketUpdates(); + } + + final Consumer loadCallback = (final LevelChunk chunk) -> { + try { + if (onComplete != null) { + onComplete.accept(chunk); + } + } finally { + if (addTicket) { + ChunkTaskScheduler.this.chunkHolderManager.addAndRemoveTickets(chunkKey, + TicketType.UNKNOWN, minLevel, new ChunkPos(chunkKey), + TicketType.CHUNK_LOAD, minLevel, chunkReference + ); + } + } + }; + + final boolean scheduled; + final LevelChunk chunk; + final ReentrantAreaLock.Node ticketLock = this.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ, accessRadius); + try { + final ReentrantAreaLock.Node schedulingLock = this.schedulingLockArea.lock(chunkX, chunkZ, accessRadius); + try { + final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey); + if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) { + scheduled = false; + chunk = null; + } else { + final FullChunkStatus currStatus = chunkHolder.getChunkStatus(); + if (currStatus.isOrAfter(toStatus)) { + scheduled = false; + chunk = (LevelChunk)chunkHolder.getCurrentChunk(); + } else { + scheduled = true; + chunk = null; + + final int radius = toStatus.ordinal() - 1; // 0 -> BORDER, 1 -> TICKING, 2 -> ENTITY_TICKING + for (int dz = -radius; dz <= radius; ++dz) { + for (int dx = -radius; dx <= radius; ++dx) { + final NewChunkHolder neighbour = + (dx | dz) == 0 ? chunkHolder : this.chunkHolderManager.getChunkHolder(dx + chunkX, dz + chunkZ); + if (neighbour != null) { + neighbour.raisePriority(priority); + } + } + } + + // ticket level should schedule for us + chunkHolder.addFullStatusConsumer(toStatus, loadCallback); + } + } + } finally { + this.schedulingLockArea.unlock(schedulingLock); + } + } finally { + this.chunkHolderManager.ticketLockArea.unlock(ticketLock); + } + + if (!scheduled) { + // couldn't schedule + try { + loadCallback.accept(chunk); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Failed to process chunk full status callback", thr); + } + } + } + + public void scheduleChunkLoad(final int chunkX, final int chunkZ, final boolean gen, final ChunkStatus toStatus, final boolean addTicket, + final PrioritisedExecutor.Priority priority, final Consumer onComplete) { + if (gen) { + this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); + return; + } + this.scheduleChunkLoad(chunkX, chunkZ, ChunkStatus.EMPTY, addTicket, priority, (final ChunkAccess chunk) -> { + if (chunk == null) { + onComplete.accept(null); + } else { + if (chunk.getStatus().isOrAfter(toStatus)) { + this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); + } else { + onComplete.accept(null); + } + } + }); + } + + // only appropriate to use with ServerLevel#syncLoadNonFull + public boolean beginChunkLoadForNonFullSync(final int chunkX, final int chunkZ, final ChunkStatus toStatus, + final PrioritisedExecutor.Priority priority) { + final int accessRadius = getAccessRadius(toStatus); + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + final int minLevel = 33 + ChunkStatus.getDistance(toStatus); + final List tasks = new ArrayList<>(); + final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node ticketLock = this.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ, accessRadius); // Folia - use area based lock to reduce contention + try { + final ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock.Node schedulingLock = this.schedulingLockArea.lock(chunkX, chunkZ, accessRadius); // Folia - use area based lock to reduce contention + try { + final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey); + if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) { + return false; + } else { + final ChunkStatus genStatus = chunkHolder.getCurrentGenStatus(); + if (genStatus != null && genStatus.isOrAfter(toStatus)) { + return true; + } else { + chunkHolder.raisePriority(priority); + + if (!chunkHolder.upgradeGenTarget(toStatus)) { + this.schedule(chunkX, chunkZ, toStatus, chunkHolder, tasks); + } + } + } + } finally { + this.schedulingLockArea.unlock(schedulingLock); + } + } finally { + this.chunkHolderManager.ticketLockArea.unlock(ticketLock); + } + + for (int i = 0, len = tasks.size(); i < len; ++i) { + tasks.get(i).schedule(); + } + + return true; + } + + public void scheduleChunkLoad(final int chunkX, final int chunkZ, final ChunkStatus toStatus, final boolean addTicket, + final PrioritisedExecutor.Priority priority, final Consumer onComplete) { + if (!TickThread.isTickThread()) { + this.scheduleChunkTask(chunkX, chunkZ, () -> { + ChunkTaskScheduler.this.scheduleChunkLoad(chunkX, chunkZ, toStatus, addTicket, priority, onComplete); + }, priority); + return; + } + final int accessRadius = getAccessRadius(toStatus); + if (this.chunkHolderManager.ticketLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { + throw new IllegalStateException("Cannot schedule chunk load during ticket level update"); + } + if (this.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ, accessRadius)) { + throw new IllegalStateException("Cannot schedule chunk loading recursively"); + } + + if (toStatus == ChunkStatus.FULL) { + this.scheduleTickingState(chunkX, chunkZ, FullChunkStatus.FULL, addTicket, priority, (Consumer)onComplete); + return; + } + + final int minLevel = 33 + ChunkStatus.getDistance(toStatus); + final Long chunkReference = addTicket ? Long.valueOf(this.chunkLoadCounter.getAndIncrement()) : null; + final long chunkKey = CoordinateUtils.getChunkKey(chunkX, chunkZ); + + if (addTicket) { + this.chunkHolderManager.addTicketAtLevel(TicketType.CHUNK_LOAD, chunkKey, minLevel, chunkReference); + this.chunkHolderManager.processTicketUpdates(); + } + + final Consumer loadCallback = (final ChunkAccess chunk) -> { + try { + if (onComplete != null) { + onComplete.accept(chunk); + } + } finally { + if (addTicket) { + ChunkTaskScheduler.this.chunkHolderManager.addAndRemoveTickets(chunkKey, + TicketType.UNKNOWN, minLevel, new ChunkPos(chunkKey), + TicketType.CHUNK_LOAD, minLevel, chunkReference + ); + } + } + }; + + final List tasks = new ArrayList<>(); + + final boolean scheduled; + final ChunkAccess chunk; + final ReentrantAreaLock.Node ticketLock = this.chunkHolderManager.ticketLockArea.lock(chunkX, chunkZ, accessRadius); + try { + final ReentrantAreaLock.Node schedulingLock = this.schedulingLockArea.lock(chunkX, chunkZ, accessRadius); + try { + final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkKey); + if (chunkHolder == null || chunkHolder.getTicketLevel() > minLevel) { + scheduled = false; + chunk = null; + } else { + final ChunkStatus genStatus = chunkHolder.getCurrentGenStatus(); + if (genStatus != null && genStatus.isOrAfter(toStatus)) { + scheduled = false; + chunk = chunkHolder.getCurrentChunk(); + } else { + scheduled = true; + chunk = null; + chunkHolder.raisePriority(priority); + + if (!chunkHolder.upgradeGenTarget(toStatus)) { + this.schedule(chunkX, chunkZ, toStatus, chunkHolder, tasks); + } + chunkHolder.addStatusConsumer(toStatus, loadCallback); + } + } + } finally { + this.schedulingLockArea.unlock(schedulingLock); + } + } finally { + this.chunkHolderManager.ticketLockArea.unlock(ticketLock); + } + + for (int i = 0, len = tasks.size(); i < len; ++i) { + tasks.get(i).schedule(); + } + + if (!scheduled) { + // couldn't schedule + try { + loadCallback.accept(chunk); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Failed to process chunk status callback", thr); + } + } + } + + private ChunkProgressionTask createTask(final int chunkX, final int chunkZ, final ChunkAccess chunk, + final NewChunkHolder chunkHolder, final List neighbours, + final ChunkStatus toStatus, final PrioritisedExecutor.Priority initialPriority) { + if (toStatus == ChunkStatus.EMPTY) { + return new ChunkLoadTask(this, this.world, chunkX, chunkZ, chunkHolder, initialPriority); + } + if (toStatus == ChunkStatus.LIGHT) { + return new ChunkLightTask(this, this.world, chunkX, chunkZ, chunk, initialPriority); + } + if (toStatus == ChunkStatus.FULL) { + return new ChunkFullTask(this, this.world, chunkX, chunkZ, chunkHolder, chunk, initialPriority); + } + + return new ChunkUpgradeGenericStatusTask(this, this.world, chunkX, chunkZ, chunk, neighbours, toStatus, initialPriority); + } + + ChunkProgressionTask schedule(final int chunkX, final int chunkZ, final ChunkStatus targetStatus, final NewChunkHolder chunkHolder, + final List allTasks) { + return this.schedule(chunkX, chunkZ, targetStatus, chunkHolder, allTasks, chunkHolder.getEffectivePriority()); + } + + // rets new task scheduled for the _specified_ chunk + // note: this must hold the scheduling lock + // minPriority is only used to pass the priority through to neighbours, as priority calculation has not yet been done + // schedule will ignore the generation target, so it should be checked by the caller to ensure the target is not regressed! + private ChunkProgressionTask schedule(final int chunkX, final int chunkZ, final ChunkStatus targetStatus, + final NewChunkHolder chunkHolder, final List allTasks, + final PrioritisedExecutor.Priority minPriority) { + if (!this.schedulingLockArea.isHeldByCurrentThread(chunkX, chunkZ, getAccessRadius(targetStatus))) { + throw new IllegalStateException("Not holding scheduling lock"); + } + + if (chunkHolder.hasGenerationTask()) { + chunkHolder.upgradeGenTarget(targetStatus); + return null; + } + + final PrioritisedExecutor.Priority requestedPriority = PrioritisedExecutor.Priority.max(minPriority, chunkHolder.getEffectivePriority()); + final ChunkStatus currentGenStatus = chunkHolder.getCurrentGenStatus(); + final ChunkAccess chunk = chunkHolder.getCurrentChunk(); + + if (currentGenStatus == null) { + // not yet loaded + final ChunkProgressionTask task = this.createTask( + chunkX, chunkZ, chunk, chunkHolder, Collections.emptyList(), ChunkStatus.EMPTY, requestedPriority + ); + + allTasks.add(task); + + final List chunkHolderNeighbours = new ArrayList<>(1); + chunkHolderNeighbours.add(chunkHolder); + + chunkHolder.setGenerationTarget(targetStatus); + chunkHolder.setGenerationTask(task, ChunkStatus.EMPTY, chunkHolderNeighbours); + + return task; + } + + if (currentGenStatus.isOrAfter(targetStatus)) { + // nothing to do + return null; + } + + // we know for sure now that we want to schedule _something_, so set the target + chunkHolder.setGenerationTarget(targetStatus); + + final ChunkStatus chunkRealStatus = chunk.getStatus(); + final ChunkStatus toStatus = currentGenStatus.getNextStatus(); + + // if this chunk has already generated up to or past the specified status, then we don't + // need the neighbours AT ALL. + final int neighbourReadRadius = chunkRealStatus.isOrAfter(toStatus) ? toStatus.loadRange : toStatus.getRange(); + + boolean unGeneratedNeighbours = false; + + // copied from MCUtil.getSpiralOutChunks + for (int r = 1; r <= neighbourReadRadius; r++) { + int x = -r; + int z = r; + + // Iterates the edge of half of the box; then negates for other half. + while (x <= r && z > -r) { + final int radius = Math.max(Math.abs(x), Math.abs(z)); + final ChunkStatus requiredNeighbourStatus = ChunkMap.getDependencyStatus(toStatus, radius); + + unGeneratedNeighbours |= this.checkNeighbour( + chunkX + x, chunkZ + z, requiredNeighbourStatus, chunkHolder, allTasks, requestedPriority + ); + unGeneratedNeighbours |= this.checkNeighbour( + chunkX - x, chunkZ - z, requiredNeighbourStatus, chunkHolder, allTasks, requestedPriority + ); + + if (x < r) { + x++; + } else { + z--; + } + } + } + + if (unGeneratedNeighbours) { + // can't schedule, but neighbour completion will schedule for us when they're ALL done + + // propagate our priority to neighbours + chunkHolder.recalculateNeighbourPriorities(); + return null; + } + + // need to gather neighbours + + final List neighbours; + final List chunkHolderNeighbours; + if (neighbourReadRadius <= 0) { + neighbours = new ArrayList<>(1); + chunkHolderNeighbours = new ArrayList<>(1); + neighbours.add(chunk); + chunkHolderNeighbours.add(chunkHolder); + } else { + // the iteration order is _very_ important, as all generation statuses expect a certain order such that: + // chunkAtRelative = neighbours.get(relX + relZ * (2 * radius + 1)) + neighbours = new ArrayList<>((2 * neighbourReadRadius + 1) * (2 * neighbourReadRadius + 1)); + chunkHolderNeighbours = new ArrayList<>((2 * neighbourReadRadius + 1) * (2 * neighbourReadRadius + 1)); + for (int dz = -neighbourReadRadius; dz <= neighbourReadRadius; ++dz) { + for (int dx = -neighbourReadRadius; dx <= neighbourReadRadius; ++dx) { + final NewChunkHolder holder = (dx | dz) == 0 ? chunkHolder : this.chunkHolderManager.getChunkHolder(dx + chunkX, dz + chunkZ); + neighbours.add(holder.getChunkForNeighbourAccess()); + chunkHolderNeighbours.add(holder); + } + } + } + + final ChunkProgressionTask task = this.createTask(chunkX, chunkZ, chunk, chunkHolder, neighbours, toStatus, chunkHolder.getEffectivePriority()); + allTasks.add(task); + + chunkHolder.setGenerationTask(task, toStatus, chunkHolderNeighbours); + + return task; + } + + // rets true if the neighbour is not at the required status, false otherwise + private boolean checkNeighbour(final int chunkX, final int chunkZ, final ChunkStatus requiredStatus, final NewChunkHolder center, + final List tasks, final PrioritisedExecutor.Priority minPriority) { + final NewChunkHolder chunkHolder = this.chunkHolderManager.getChunkHolder(chunkX, chunkZ); + + if (chunkHolder == null) { + throw new IllegalStateException("Missing chunkholder when required"); + } + + final ChunkStatus holderStatus = chunkHolder.getCurrentGenStatus(); + if (holderStatus != null && holderStatus.isOrAfter(requiredStatus)) { + return false; + } + + if (chunkHolder.hasFailedGeneration()) { + return true; + } + + center.addGenerationBlockingNeighbour(chunkHolder); + chunkHolder.addWaitingNeighbour(center, requiredStatus); + + if (chunkHolder.upgradeGenTarget(requiredStatus)) { + return true; + } + + // not at status required, so we need to schedule its generation + this.schedule( + chunkX, chunkZ, requiredStatus, chunkHolder, tasks, minPriority + ); + + return true; + } + + /** + * @deprecated Chunk tasks must be tied to coordinates in the future + */ + @Deprecated + public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run) { + return this.scheduleChunkTask(run, PrioritisedExecutor.Priority.NORMAL); + } + + /** + * @deprecated Chunk tasks must be tied to coordinates in the future + */ + @Deprecated + public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final Runnable run, final PrioritisedExecutor.Priority priority) { + return this.mainThreadExecutor.queueRunnable(run, priority); + } + + public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run) { + return this.createChunkTask(chunkX, chunkZ, run, PrioritisedExecutor.Priority.NORMAL); + } + + public PrioritisedExecutor.PrioritisedTask createChunkTask(final int chunkX, final int chunkZ, final Runnable run, + final PrioritisedExecutor.Priority priority) { + return this.mainThreadExecutor.createTask(run, priority); + } + + public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run) { + return this.mainThreadExecutor.queueRunnable(run); + } + + public PrioritisedExecutor.PrioritisedTask scheduleChunkTask(final int chunkX, final int chunkZ, final Runnable run, + final PrioritisedExecutor.Priority priority) { + return this.mainThreadExecutor.queueRunnable(run, priority); + } + + public void executeTasksUntil(final BooleanSupplier exit) { + if (Bukkit.isPrimaryThread()) { + this.mainThreadExecutor.executeConditionally(exit); + } else { + long counter = 1L; + while (!exit.getAsBoolean()) { + counter = ConcurrentUtil.linearLongBackoff(counter, 100_000L, 5_000_000L); // 100us, 5ms + } + } + } + + public boolean halt(final boolean sync, final long maxWaitNS) { + this.radiusAwareGenExecutor.halt(); + this.parallelGenExecutor.halt(); + this.loadExecutor.halt(); + final long time = System.nanoTime(); + if (sync) { + for (long failures = 9L;; failures = ConcurrentUtil.linearLongBackoff(failures, 500_000L, 50_000_000L)) { + if ( + !this.radiusAwareGenExecutor.isActive() && + !this.parallelGenExecutor.isActive() && + !this.loadExecutor.isActive() + ) { + return true; + } + if ((System.nanoTime() - time) >= maxWaitNS) { + return false; + } + } + } + + return true; + } + + public static final ArrayDeque WAITING_CHUNKS = new ArrayDeque<>(); // stack + + public static final class ChunkInfo { + + public final int chunkX; + public final int chunkZ; + public final ServerLevel world; + + public ChunkInfo(final int chunkX, final int chunkZ, final ServerLevel world) { + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.world = world; + } + + @Override + public String toString() { + return "[( " + this.chunkX + "," + this.chunkZ + ") in '" + this.world.getWorld().getName() + "']"; + } + } + + public static void pushChunkWait(final ServerLevel world, final int chunkX, final int chunkZ) { + synchronized (WAITING_CHUNKS) { + WAITING_CHUNKS.push(new ChunkInfo(chunkX, chunkZ, world)); + } + } + + public static void popChunkWait() { + synchronized (WAITING_CHUNKS) { + WAITING_CHUNKS.pop(); + } + } + + public static ChunkInfo[] getChunkInfos() { + synchronized (WAITING_CHUNKS) { + return WAITING_CHUNKS.toArray(new ChunkInfo[0]); + } + } + + public static void dumpAllChunkLoadInfo(final boolean longPrint) { + final ChunkInfo[] chunkInfos = getChunkInfos(); + if (chunkInfos.length > 0) { + LOGGER.error("Chunk wait task info below: "); + for (final ChunkInfo chunkInfo : chunkInfos) { + final NewChunkHolder holder = chunkInfo.world.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkInfo.chunkX, chunkInfo.chunkZ); + LOGGER.error("Chunk wait: " + chunkInfo); + LOGGER.error("Chunk holder: " + holder); + } + + if (longPrint) { + final File file = new File(new File(new File("."), "debug"), "chunks-watchdog.txt"); + LOGGER.error("Writing chunk information dump to " + file); + try { + MCUtil.dumpChunks(file, true); + LOGGER.error("Successfully written chunk information!"); + } catch (final Throwable thr) { + MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr); + } + } + } + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java new file mode 100644 index 0000000000000000000000000000000000000000..5024aafbe607b1fa884fcab42fc05da30a54e185 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ChunkUpgradeGenericStatusTask.java @@ -0,0 +1,212 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import com.mojang.datafixers.util.Either; +import com.mojang.logging.LogUtils; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.ChunkMap; +import net.minecraft.server.level.ServerChunkCache; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.ProtoChunk; +import org.slf4j.Logger; +import java.lang.invoke.VarHandle; +import java.util.List; +import java.util.Map; +import java.util.concurrent.CompletableFuture; + +public final class ChunkUpgradeGenericStatusTask extends ChunkProgressionTask implements Runnable { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + protected final ChunkAccess fromChunk; + protected final ChunkStatus fromStatus; + protected final ChunkStatus toStatus; + protected final List neighbours; + + protected final PrioritisedExecutor.PrioritisedTask generateTask; + + public ChunkUpgradeGenericStatusTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, + final int chunkZ, final ChunkAccess chunk, final List neighbours, + final ChunkStatus toStatus, final PrioritisedExecutor.Priority priority) { + super(scheduler, world, chunkX, chunkZ); + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.fromChunk = chunk; + this.fromStatus = chunk.getStatus(); + this.toStatus = toStatus; + this.neighbours = neighbours; + if (this.toStatus.isParallelCapable) { + this.generateTask = this.scheduler.parallelGenExecutor.createTask(this, priority); + } else { + this.generateTask = this.scheduler.radiusAwareScheduler.createTask(chunkX, chunkZ, this.toStatus.writeRadius, this, priority); + } + } + + @Override + public ChunkStatus getTargetStatus() { + return this.toStatus; + } + + private boolean isEmptyTask() { + // must use fromStatus here to avoid any race condition with run() overwriting the status + final boolean generation = !this.fromStatus.isOrAfter(this.toStatus); + return (generation && this.toStatus.isEmptyGenStatus()) || (!generation && this.toStatus.isEmptyLoadStatus()); + } + + @Override + public void run() { + final ChunkAccess chunk = this.fromChunk; + + final ServerChunkCache serverChunkCache = this.world.chunkSource; + final ChunkMap chunkMap = serverChunkCache.chunkMap; + + final CompletableFuture> completeFuture; + + final boolean generation; + boolean completing = false; + + // note: should optimise the case where the chunk does not need to execute the status, because + // schedule() calls this synchronously if it will run through that path + + try { + generation = !chunk.getStatus().isOrAfter(this.toStatus); + if (generation) { + if (this.toStatus.isEmptyGenStatus()) { + if (chunk instanceof ProtoChunk) { + ((ProtoChunk)chunk).setStatus(this.toStatus); + } + completing = true; + this.complete(chunk, null); + return; + } + completeFuture = this.toStatus.generate(Runnable::run, this.world, chunkMap.generator, chunkMap.structureTemplateManager, + serverChunkCache.getLightEngine(), null, this.neighbours) + .whenComplete((final Either either, final Throwable throwable) -> { + final ChunkAccess newChunk = (either == null) ? null : either.left().orElse(null); + if (newChunk instanceof ProtoChunk) { + ((ProtoChunk)newChunk).setStatus(ChunkUpgradeGenericStatusTask.this.toStatus); + } + } + ); + } else { + if (this.toStatus.isEmptyLoadStatus()) { + completing = true; + this.complete(chunk, null); + return; + } + completeFuture = this.toStatus.load(this.world, chunkMap.structureTemplateManager, serverChunkCache.getLightEngine(), null, chunk); + } + } catch (final Throwable throwable) { + if (!completing) { + this.complete(null, throwable); + + if (throwable instanceof ThreadDeath) { + throw (ThreadDeath)throwable; + } + return; + } + + this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Target status", ChunkTaskScheduler.stringIfNull(this.toStatus), + "From status", ChunkTaskScheduler.stringIfNull(this.fromStatus), + "Generation task", this + ), throwable); + + if (!(throwable instanceof ThreadDeath)) { + LOGGER.error("Failed to complete status for chunk: status:" + this.toStatus + ", chunk: (" + this.chunkX + "," + this.chunkZ + "), world: " + this.world.getWorld().getName(), throwable); + } else { + // ensure the chunk system can respond, then die + throw (ThreadDeath)throwable; + } + return; + } + + if (!completeFuture.isDone() && !this.toStatus.warnedAboutNoImmediateComplete.getAndSet(true)) { + LOGGER.warn("Future status not complete after scheduling: " + this.toStatus.toString() + ", generate: " + generation); + } + + final Either either; + final ChunkAccess newChunk; + + try { + either = completeFuture.join(); + newChunk = (either == null) ? null : either.left().orElse(null); + } catch (final Throwable throwable) { + this.complete(null, throwable); + // ensure the chunk system can respond, then die + if (throwable instanceof ThreadDeath) { + throw (ThreadDeath)throwable; + } + return; + } + + if (newChunk == null) { + this.complete(null, new IllegalStateException("Chunk for status: " + ChunkUpgradeGenericStatusTask.this.toStatus.toString() + ", generation: " + generation + " should not be null! Either: " + either).fillInStackTrace()); + return; + } + + this.complete(newChunk, null); + } + + protected volatile boolean scheduled; + protected static final VarHandle SCHEDULED_HANDLE = ConcurrentUtil.getVarHandle(ChunkUpgradeGenericStatusTask.class, "scheduled", boolean.class); + + @Override + public boolean isScheduled() { + return this.scheduled; + } + + @Override + public void schedule() { + if ((boolean)SCHEDULED_HANDLE.getAndSet((ChunkUpgradeGenericStatusTask)this, true)) { + throw new IllegalStateException("Cannot double call schedule()"); + } + if (this.isEmptyTask()) { + if (this.generateTask.cancel()) { + this.run(); + } + } else { + this.generateTask.queue(); + } + } + + @Override + public void cancel() { + if (this.generateTask.cancel()) { + this.complete(null, null); + } + } + + @Override + public PrioritisedExecutor.Priority getPriority() { + return this.generateTask.getPriority(); + } + + @Override + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.generateTask.lowerPriority(priority); + } + + @Override + public void setPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.generateTask.setPriority(priority); + } + + @Override + public void raisePriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.generateTask.raisePriority(priority); + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java new file mode 100644 index 0000000000000000000000000000000000000000..396d72c00e47cf1669ae20dc839c1c961b1f262a --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/GenericDataLoadTask.java @@ -0,0 +1,746 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.completable.Completable; +import ca.spottedleaf.concurrentutil.executor.Cancellable; +import ca.spottedleaf.concurrentutil.executor.standard.DelayedPrioritisedTask; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import com.mojang.logging.LogUtils; +import io.papermc.paper.chunk.system.io.RegionFileIOThread; +import net.minecraft.nbt.CompoundTag; +import net.minecraft.server.level.ServerLevel; +import org.slf4j.Logger; +import java.lang.invoke.VarHandle; +import java.util.Map; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.concurrent.atomic.AtomicLong; +import java.util.function.BiConsumer; + +public abstract class GenericDataLoadTask { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + protected static final CompoundTag CANCELLED_DATA = new CompoundTag(); + + // reference count is the upper 32 bits + protected final AtomicLong stageAndReferenceCount = new AtomicLong(STAGE_NOT_STARTED); + + protected static final long STAGE_MASK = 0xFFFFFFFFL; + protected static final long STAGE_CANCELLED = 0xFFFFFFFFL; + protected static final long STAGE_NOT_STARTED = 0L; + protected static final long STAGE_LOADING = 1L; + protected static final long STAGE_PROCESSING = 2L; + protected static final long STAGE_COMPLETED = 3L; + + // for loading data off disk + protected final LoadDataFromDiskTask loadDataFromDiskTask; + // processing off-main + protected final PrioritisedExecutor.PrioritisedTask processOffMain; + // processing on-main + protected final PrioritisedExecutor.PrioritisedTask processOnMain; + + protected final ChunkTaskScheduler scheduler; + protected final ServerLevel world; + protected final int chunkX; + protected final int chunkZ; + protected final RegionFileIOThread.RegionFileType type; + + public GenericDataLoadTask(final ChunkTaskScheduler scheduler, final ServerLevel world, final int chunkX, + final int chunkZ, final RegionFileIOThread.RegionFileType type, + final PrioritisedExecutor.Priority priority) { + this.scheduler = scheduler; + this.world = world; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.type = type; + + final ProcessOnMainTask mainTask; + if (this.hasOnMain()) { + mainTask = new ProcessOnMainTask(); + this.processOnMain = this.createOnMain(mainTask, priority); + } else { + mainTask = null; + this.processOnMain = null; + } + + final ProcessOffMainTask offMainTask; + if (this.hasOffMain()) { + offMainTask = new ProcessOffMainTask(mainTask); + this.processOffMain = this.createOffMain(offMainTask, priority); + } else { + offMainTask = null; + this.processOffMain = null; + } + + if (this.processOffMain == null && this.processOnMain == null) { + throw new IllegalStateException("Illegal class implementation: " + this.getClass().getName() + ", should be able to schedule at least one task!"); + } + + this.loadDataFromDiskTask = new LoadDataFromDiskTask(world, chunkX, chunkZ, type, new DataLoadCallback(offMainTask, mainTask), priority); + } + + public static final record TaskResult(L left, R right) {} + + protected abstract boolean hasOffMain(); + + protected abstract boolean hasOnMain(); + + protected abstract PrioritisedExecutor.PrioritisedTask createOffMain(final Runnable run, final PrioritisedExecutor.Priority priority); + + protected abstract PrioritisedExecutor.PrioritisedTask createOnMain(final Runnable run, final PrioritisedExecutor.Priority priority); + + protected abstract TaskResult runOffMain(final CompoundTag data, final Throwable throwable); + + protected abstract TaskResult runOnMain(final OnMain data, final Throwable throwable); + + protected abstract void onComplete(final TaskResult result); + + protected abstract TaskResult completeOnMainOffMain(final OnMain data, final Throwable throwable); + + @Override + public String toString() { + return "GenericDataLoadTask{class: " + this.getClass().getName() + ", world: " + this.world.getWorld().getName() + + ", chunk: (" + this.chunkX + "," + this.chunkZ + "), hashcode: " + System.identityHashCode(this) + ", priority: " + this.getPriority() + + ", type: " + this.type.toString() + "}"; + } + + public PrioritisedExecutor.Priority getPriority() { + if (this.processOnMain != null) { + return this.processOnMain.getPriority(); + } else { + return this.processOffMain.getPriority(); + } + } + + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + // can't lower I/O tasks, we don't know what they affect + if (this.processOffMain != null) { + this.processOffMain.lowerPriority(priority); + } + if (this.processOnMain != null) { + this.processOnMain.lowerPriority(priority); + } + } + + public void setPriority(final PrioritisedExecutor.Priority priority) { + // can't lower I/O tasks, we don't know what they affect + this.loadDataFromDiskTask.raisePriority(priority); + if (this.processOffMain != null) { + this.processOffMain.setPriority(priority); + } + if (this.processOnMain != null) { + this.processOnMain.setPriority(priority); + } + } + + public void raisePriority(final PrioritisedExecutor.Priority priority) { + // can't lower I/O tasks, we don't know what they affect + this.loadDataFromDiskTask.raisePriority(priority); + if (this.processOffMain != null) { + this.processOffMain.raisePriority(priority); + } + if (this.processOnMain != null) { + this.processOnMain.raisePriority(priority); + } + } + + // returns whether scheduleNow() needs to be called + public boolean schedule(final boolean delay) { + if (this.stageAndReferenceCount.get() != STAGE_NOT_STARTED || + !this.stageAndReferenceCount.compareAndSet(STAGE_NOT_STARTED, (1L << 32) | STAGE_LOADING)) { + // try and increment reference count + int failures = 0; + for (long curr = this.stageAndReferenceCount.get();;) { + if ((curr & STAGE_MASK) == STAGE_CANCELLED || (curr & STAGE_MASK) == STAGE_COMPLETED) { + // cancelled or completed, nothing to do here + return false; + } + + if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, curr + (1L << 32)))) { + // successful + return false; + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + if (!delay) { + this.scheduleNow(); + return false; + } + return true; + } + + public void scheduleNow() { + this.loadDataFromDiskTask.schedule(); // will schedule the rest + } + + // assumes the current stage cannot be completed + // returns false if cancelled, returns true if can proceed + private boolean advanceStage(final long expect, final long to) { + int failures = 0; + for (long curr = this.stageAndReferenceCount.get();;) { + if ((curr & STAGE_MASK) != expect) { + // must be cancelled + return false; + } + + final long newVal = (curr & ~STAGE_MASK) | to; + if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) { + return true; + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public boolean cancel() { + int failures = 0; + for (long curr = this.stageAndReferenceCount.get();;) { + if ((curr & STAGE_MASK) == STAGE_COMPLETED || (curr & STAGE_MASK) == STAGE_CANCELLED) { + return false; + } + + if ((curr & STAGE_MASK) == STAGE_NOT_STARTED || (curr & ~STAGE_MASK) == (1L << 32)) { + // no other references, so we can cancel + final long newVal = STAGE_CANCELLED; + if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) { + this.loadDataFromDiskTask.cancel(); + if (this.processOffMain != null) { + this.processOffMain.cancel(); + } + if (this.processOnMain != null) { + this.processOnMain.cancel(); + } + this.onComplete(null); + return true; + } + } else { + if ((curr & ~STAGE_MASK) == (0L << 32)) { + throw new IllegalStateException("Reference count cannot be zero here"); + } + // just decrease the reference count + final long newVal = curr - (1L << 32); + if (curr == (curr = this.stageAndReferenceCount.compareAndExchange(curr, newVal))) { + return false; + } + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + protected final class DataLoadCallback implements BiConsumer { + + protected final ProcessOffMainTask offMainTask; + protected final ProcessOnMainTask onMainTask; + + public DataLoadCallback(final ProcessOffMainTask offMainTask, final ProcessOnMainTask onMainTask) { + this.offMainTask = offMainTask; + this.onMainTask = onMainTask; + } + + @Override + public void accept(final CompoundTag compoundTag, final Throwable throwable) { + if (GenericDataLoadTask.this.stageAndReferenceCount.get() == STAGE_CANCELLED) { + // don't try to schedule further + return; + } + + try { + if (compoundTag == CANCELLED_DATA) { + // cancelled, except this isn't possible + LOGGER.error("Data callback says cancelled, but stage does not?"); + return; + } + + // get off of the regionfile callback ASAP, no clue what locks are held right now... + if (GenericDataLoadTask.this.processOffMain != null) { + this.offMainTask.data = compoundTag; + this.offMainTask.throwable = throwable; + GenericDataLoadTask.this.processOffMain.queue(); + return; + } else { + // no off-main task, so go straight to main + this.onMainTask.data = (OnMain)compoundTag; + this.onMainTask.throwable = throwable; + GenericDataLoadTask.this.processOnMain.queue(); + } + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr2) { + LOGGER.error("Failed I/O callback for task: " + GenericDataLoadTask.this.toString(), thr2); + GenericDataLoadTask.this.scheduler.unrecoverableChunkSystemFailure( + GenericDataLoadTask.this.chunkX, GenericDataLoadTask.this.chunkZ, Map.of( + "Callback throwable", ChunkTaskScheduler.stringIfNull(throwable) + ), thr2); + } + } + } + + protected final class ProcessOffMainTask implements Runnable { + + protected CompoundTag data; + protected Throwable throwable; + protected final ProcessOnMainTask schedule; + + public ProcessOffMainTask(final ProcessOnMainTask schedule) { + this.schedule = schedule; + } + + @Override + public void run() { + if (!GenericDataLoadTask.this.advanceStage(STAGE_LOADING, this.schedule == null ? STAGE_COMPLETED : STAGE_PROCESSING)) { + // cancelled + return; + } + final TaskResult newData = GenericDataLoadTask.this.runOffMain(this.data, this.throwable); + + if (GenericDataLoadTask.this.stageAndReferenceCount.get() == STAGE_CANCELLED) { + // don't try to schedule further + return; + } + + if (this.schedule != null) { + final TaskResult syncComplete = GenericDataLoadTask.this.completeOnMainOffMain(newData.left, newData.right); + + if (syncComplete != null) { + if (GenericDataLoadTask.this.advanceStage(STAGE_PROCESSING, STAGE_COMPLETED)) { + GenericDataLoadTask.this.onComplete(syncComplete); + } // else: cancelled + return; + } + + this.schedule.data = newData.left; + this.schedule.throwable = newData.right; + + GenericDataLoadTask.this.processOnMain.queue(); + } else { + GenericDataLoadTask.this.onComplete((TaskResult)newData); + } + } + } + + protected final class ProcessOnMainTask implements Runnable { + + protected OnMain data; + protected Throwable throwable; + + @Override + public void run() { + if (!GenericDataLoadTask.this.advanceStage(STAGE_PROCESSING, STAGE_COMPLETED)) { + // cancelled + return; + } + final TaskResult result = GenericDataLoadTask.this.runOnMain(this.data, this.throwable); + + GenericDataLoadTask.this.onComplete(result); + } + } + + public static final class LoadDataFromDiskTask { + + protected volatile int priority; + protected static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(LoadDataFromDiskTask.class, "priority", int.class); + + protected static final int PRIORITY_EXECUTED = Integer.MIN_VALUE >>> 0; + protected static final int PRIORITY_LOAD_SCHEDULED = Integer.MIN_VALUE >>> 1; + protected static final int PRIORITY_UNLOAD_SCHEDULED = Integer.MIN_VALUE >>> 2; + + protected static final int PRIORITY_FLAGS = ~Character.MAX_VALUE; + + protected final int getPriorityVolatile() { + return (int)PRIORITY_HANDLE.getVolatile((LoadDataFromDiskTask)this); + } + + protected final int compareAndExchangePriorityVolatile(final int expect, final int update) { + return (int)PRIORITY_HANDLE.compareAndExchange((LoadDataFromDiskTask)this, (int)expect, (int)update); + } + + protected final int getAndOrPriorityVolatile(final int val) { + return (int)PRIORITY_HANDLE.getAndBitwiseOr((LoadDataFromDiskTask)this, (int)val); + } + + protected final void setPriorityPlain(final int val) { + PRIORITY_HANDLE.set((LoadDataFromDiskTask)this, (int)val); + } + + private final ServerLevel world; + private final int chunkX; + private final int chunkZ; + + private final RegionFileIOThread.RegionFileType type; + private Cancellable dataLoadTask; + private Cancellable dataUnloadCancellable; + private DelayedPrioritisedTask dataUnloadTask; + + private final BiConsumer onComplete; + + // onComplete should be caller sensitive, it may complete synchronously with schedule() - which does + // hold a priority lock. + public LoadDataFromDiskTask(final ServerLevel world, final int chunkX, final int chunkZ, + final RegionFileIOThread.RegionFileType type, + final BiConsumer onComplete, + final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.world = world; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.type = type; + this.onComplete = onComplete; + this.setPriorityPlain(priority.priority); + } + + private void complete(final CompoundTag data, final Throwable throwable) { + try { + this.onComplete.accept(data, throwable); + } catch (final Throwable thr2) { + this.world.chunkTaskScheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Completed throwable", ChunkTaskScheduler.stringIfNull(throwable), + "Regionfile type", ChunkTaskScheduler.stringIfNull(this.type) + ), thr2); + if (thr2 instanceof ThreadDeath) { + throw (ThreadDeath)thr2; + } + } + } + + protected boolean markExecuting() { + return (this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) == 0; + } + + protected boolean isMarkedExecuted() { + return (this.getPriorityVolatile() & PRIORITY_EXECUTED) != 0; + } + + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + int failures = 0; + for (int curr = this.getPriorityVolatile();;) { + if ((curr & PRIORITY_EXECUTED) != 0) { + // cancelled or executed + return; + } + + if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) { + RegionFileIOThread.lowerPriority(this.world, this.chunkX, this.chunkZ, this.type, priority); + return; + } + + if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) { + if (this.dataUnloadTask != null) { + this.dataUnloadTask.lowerPriority(priority); + } + // no return - we need to propagate priority + } + + if (!priority.isHigherPriority(curr & ~PRIORITY_FLAGS)) { + return; + } + + if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) { + return; + } + + // failed, retry + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public void setPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + int failures = 0; + for (int curr = this.getPriorityVolatile();;) { + if ((curr & PRIORITY_EXECUTED) != 0) { + // cancelled or executed + return; + } + + if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) { + RegionFileIOThread.setPriority(this.world, this.chunkX, this.chunkZ, this.type, priority); + return; + } + + if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) { + if (this.dataUnloadTask != null) { + this.dataUnloadTask.setPriority(priority); + } + // no return - we need to propagate priority + } + + if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) { + return; + } + + // failed, retry + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public void raisePriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + int failures = 0; + for (int curr = this.getPriorityVolatile();;) { + if ((curr & PRIORITY_EXECUTED) != 0) { + // cancelled or executed + return; + } + + if ((curr & PRIORITY_LOAD_SCHEDULED) != 0) { + RegionFileIOThread.raisePriority(this.world, this.chunkX, this.chunkZ, this.type, priority); + return; + } + + if ((curr & PRIORITY_UNLOAD_SCHEDULED) != 0) { + if (this.dataUnloadTask != null) { + this.dataUnloadTask.raisePriority(priority); + } + // no return - we need to propagate priority + } + + if (!priority.isLowerPriority(curr & ~PRIORITY_FLAGS)) { + return; + } + + if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority | (curr & PRIORITY_FLAGS)))) { + return; + } + + // failed, retry + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public void cancel() { + if ((this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) != 0) { + // cancelled or executed already + return; + } + + // OK if we miss the field read, the task cannot complete if the cancelled bit is set and + // the write to dataLoadTask will check for the cancelled bit + if (this.dataUnloadCancellable != null) { + this.dataUnloadCancellable.cancel(); + } + + if (this.dataLoadTask != null) { + this.dataLoadTask.cancel(); + } + + this.complete(CANCELLED_DATA, null); + } + + private final AtomicBoolean scheduled = new AtomicBoolean(); + + public void schedule() { + if (this.scheduled.getAndSet(true)) { + throw new IllegalStateException("schedule() called twice"); + } + int priority = this.getPriorityVolatile(); + + if ((priority & PRIORITY_EXECUTED) != 0) { + // cancelled + return; + } + + final BiConsumer consumer = (final CompoundTag data, final Throwable thr) -> { + // because cancelScheduled() cannot actually stop this task from executing in every case, we need + // to mark complete here to ensure we do not double complete + if (LoadDataFromDiskTask.this.markExecuting()) { + LoadDataFromDiskTask.this.complete(data, thr); + } // else: cancelled + }; + + final PrioritisedExecutor.Priority initialPriority = PrioritisedExecutor.Priority.getPriority(priority); + boolean scheduledUnload = false; + + final NewChunkHolder holder = this.world.chunkTaskScheduler.chunkHolderManager.getChunkHolder(this.chunkX, this.chunkZ); + if (holder != null) { + final BiConsumer unloadConsumer = (final CompoundTag data, final Throwable thr) -> { + if (data != null) { + consumer.accept(data, null); + } else { + // need to schedule task + LoadDataFromDiskTask.this.schedule(false, consumer, PrioritisedExecutor.Priority.getPriority(LoadDataFromDiskTask.this.getPriorityVolatile() & ~PRIORITY_FLAGS)); + } + }; + Cancellable unloadCancellable = null; + CompoundTag syncComplete = null; + final NewChunkHolder.UnloadTask unloadTask = holder.getUnloadTask(this.type); // can be null if no task exists + final Completable unloadCompletable = unloadTask == null ? null : unloadTask.completable(); + if (unloadCompletable != null) { + unloadCancellable = unloadCompletable.addAsynchronousWaiter(unloadConsumer); + if (unloadCancellable == null) { + syncComplete = unloadCompletable.getResult(); + } + } + + if (syncComplete != null) { + consumer.accept(syncComplete, null); + return; + } + + if (unloadCancellable != null) { + scheduledUnload = true; + this.dataUnloadCancellable = unloadCancellable; + this.dataUnloadTask = unloadTask.task(); + } + } + + this.schedule(scheduledUnload, consumer, initialPriority); + } + + private void schedule(final boolean scheduledUnload, final BiConsumer consumer, final PrioritisedExecutor.Priority initialPriority) { + int priority = this.getPriorityVolatile(); + + if ((priority & PRIORITY_EXECUTED) != 0) { + // cancelled + return; + } + + if (!scheduledUnload) { + this.dataLoadTask = RegionFileIOThread.loadDataAsync( + this.world, this.chunkX, this.chunkZ, this.type, consumer, + initialPriority.isHigherPriority(PrioritisedExecutor.Priority.NORMAL), initialPriority + ); + } + + int failures = 0; + for (;;) { + if (priority == (priority = this.compareAndExchangePriorityVolatile(priority, priority | (scheduledUnload ? PRIORITY_UNLOAD_SCHEDULED : PRIORITY_LOAD_SCHEDULED)))) { + return; + } + + if ((priority & PRIORITY_EXECUTED) != 0) { + // cancelled or executed + if (this.dataUnloadCancellable != null) { + this.dataUnloadCancellable.cancel(); + } + + if (this.dataLoadTask != null) { + this.dataLoadTask.cancel(); + } + return; + } + + if (scheduledUnload) { + if (this.dataUnloadTask != null) { + this.dataUnloadTask.setPriority(PrioritisedExecutor.Priority.getPriority(priority & ~PRIORITY_FLAGS)); + } + } else { + RegionFileIOThread.setPriority(this.world, this.chunkX, this.chunkZ, this.type, PrioritisedExecutor.Priority.getPriority(priority & ~PRIORITY_FLAGS)); + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + /* + private static final class LoadDataPriorityHolder extends PriorityHolder { + + protected final LoadDataFromDiskTask task; + + protected LoadDataPriorityHolder(final PrioritisedExecutor.Priority priority, final LoadDataFromDiskTask task) { + super(priority); + this.task = task; + } + + @Override + protected void cancelScheduled() { + final Cancellable dataLoadTask = this.task.dataLoadTask; + if (dataLoadTask != null) { + // OK if we miss the field read, the task cannot complete if the cancelled bit is set and + // the write to dataLoadTask will check for the cancelled bit + this.task.dataLoadTask.cancel(); + } + this.task.complete(CANCELLED_DATA, null); + } + + @Override + protected PrioritisedExecutor.Priority getScheduledPriority() { + final LoadDataFromDiskTask task = this.task; + return RegionFileIOThread.getPriority(task.world, task.chunkX, task.chunkZ, task.type); + } + + @Override + protected void scheduleTask(final PrioritisedExecutor.Priority priority) { + final LoadDataFromDiskTask task = this.task; + final BiConsumer consumer = (final CompoundTag data, final Throwable thr) -> { + // because cancelScheduled() cannot actually stop this task from executing in every case, we need + // to mark complete here to ensure we do not double complete + if (LoadDataPriorityHolder.this.markExecuting()) { + LoadDataPriorityHolder.this.task.complete(data, thr); + } // else: cancelled + }; + task.dataLoadTask = RegionFileIOThread.loadDataAsync( + task.world, task.chunkX, task.chunkZ, task.type, consumer, + priority.isHigherPriority(PrioritisedExecutor.Priority.NORMAL), priority + ); + if (this.isMarkedExecuted()) { + // if we are marked as completed, it could be: + // 1. we were cancelled + // 2. the consumer was completed + // in the 2nd case, cancel() does nothing + // in the 1st case, we ensure cancel() is called as it is possible for the cancelling thread + // to miss the field write here + task.dataLoadTask.cancel(); + } + } + + @Override + protected void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority) { + final LoadDataFromDiskTask task = this.task; + RegionFileIOThread.lowerPriority(task.world, task.chunkX, task.chunkZ, task.type, priority); + } + + @Override + protected void setPriorityScheduled(final PrioritisedExecutor.Priority priority) { + final LoadDataFromDiskTask task = this.task; + RegionFileIOThread.setPriority(task.world, task.chunkX, task.chunkZ, task.type, priority); + } + + @Override + protected void raisePriorityScheduled(final PrioritisedExecutor.Priority priority) { + final LoadDataFromDiskTask task = this.task; + RegionFileIOThread.raisePriority(task.world, task.chunkX, task.chunkZ, task.type, priority); + } + } + */ + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java new file mode 100644 index 0000000000000000000000000000000000000000..56b07a3306e5735816c8d89601b519cb0db6379a --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/NewChunkHolder.java @@ -0,0 +1,2106 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.completable.Completable; +import ca.spottedleaf.concurrentutil.executor.Cancellable; +import ca.spottedleaf.concurrentutil.executor.standard.DelayedPrioritisedTask; +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import com.google.gson.JsonArray; +import com.google.gson.JsonElement; +import com.google.gson.JsonObject; +import com.google.gson.JsonPrimitive; +import com.mojang.logging.LogUtils; +import io.papermc.paper.chunk.system.io.RegionFileIOThread; +import io.papermc.paper.chunk.system.poi.PoiChunk; +import io.papermc.paper.util.CoordinateUtils; +import io.papermc.paper.util.TickThread; +import io.papermc.paper.util.WorldUtil; +import io.papermc.paper.world.ChunkEntitySlices; +import it.unimi.dsi.fastutil.objects.Reference2ObjectLinkedOpenHashMap; +import it.unimi.dsi.fastutil.objects.Reference2ObjectMap; +import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap; +import it.unimi.dsi.fastutil.objects.ReferenceLinkedOpenHashSet; +import net.minecraft.nbt.CompoundTag; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.ChunkLevel; +import net.minecraft.server.level.FullChunkStatus; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.TicketType; +import net.minecraft.world.entity.Entity; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; +import net.minecraft.world.level.chunk.ImposterProtoChunk; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.chunk.storage.ChunkSerializer; +import net.minecraft.world.level.chunk.storage.EntityStorage; +import org.slf4j.Logger; +import java.lang.invoke.VarHandle; +import java.util.ArrayList; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.function.Consumer; + +public final class NewChunkHolder { + + private static final Logger LOGGER = LogUtils.getClassLogger(); + + public static final Thread.UncaughtExceptionHandler CHUNKSYSTEM_UNCAUGHT_EXCEPTION_HANDLER = new Thread.UncaughtExceptionHandler() { + @Override + public void uncaughtException(final Thread thread, final Throwable throwable) { + if (!(throwable instanceof ThreadDeath)) { + LOGGER.error("Uncaught exception in thread " + thread.getName(), throwable); + } + } + }; + + public final ServerLevel world; + public final int chunkX; + public final int chunkZ; + + public final ChunkTaskScheduler scheduler; + + // load/unload state + + // chunk data state + + private ChunkEntitySlices entityChunk; + // entity chunk that is loaded, but not yet deserialized + private CompoundTag pendingEntityChunk; + + ChunkEntitySlices loadInEntityChunk(final boolean transientChunk) { + TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot sync load entity data off-main"); + final CompoundTag entityChunk; + final ChunkEntitySlices ret; + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + if (this.entityChunk != null && (transientChunk || !this.entityChunk.isTransient())) { + return this.entityChunk; + } + final CompoundTag pendingEntityChunk = this.pendingEntityChunk; + if (!transientChunk && pendingEntityChunk == null) { + throw new IllegalStateException("Must load entity data from disk before loading in the entity chunk!"); + } + + if (this.entityChunk == null) { + ret = this.entityChunk = new ChunkEntitySlices( + this.world, this.chunkX, this.chunkZ, this.getChunkStatus(), + WorldUtil.getMinSection(this.world), WorldUtil.getMaxSection(this.world) + ); + + ret.setTransient(transientChunk); + + this.world.getEntityLookup().entitySectionLoad(this.chunkX, this.chunkZ, ret); + } else { + // transientChunk = false here + ret = this.entityChunk; + this.entityChunk.setTransient(false); + } + + if (!transientChunk) { + this.pendingEntityChunk = null; + entityChunk = pendingEntityChunk == EMPTY_ENTITY_CHUNK ? null : pendingEntityChunk; + } else { + entityChunk = null; + } + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + + if (!transientChunk) { + if (entityChunk != null) { + final List entities = EntityStorage.readEntities(this.world, entityChunk); + + this.world.getEntityLookup().addEntityChunkEntities(entities, new ChunkPos(this.chunkX, this.chunkZ)); + } + } + + return ret; + } + + // needed to distinguish whether the entity chunk has been read from disk but is empty or whether it has _not_ + // been read from disk + private static final CompoundTag EMPTY_ENTITY_CHUNK = new CompoundTag(); + + private ChunkLoadTask.EntityDataLoadTask entityDataLoadTask; + // note: if entityDataLoadTask is cancelled, but on its completion entityDataLoadTaskWaiters.size() != 0, + // then the task is rescheduled + private List entityDataLoadTaskWaiters; + + public ChunkLoadTask.EntityDataLoadTask getEntityDataLoadTask() { + return this.entityDataLoadTask; + } + + // must hold schedule lock for the two below functions + + // returns only if the data has been loaded from disk, DOES NOT relate to whether it has been deserialized + // or added into the world (or even into entityChunk) + public boolean isEntityChunkNBTLoaded() { + return (this.entityChunk != null && !this.entityChunk.isTransient()) || this.pendingEntityChunk != null; + } + + private void completeEntityLoad(final GenericDataLoadTask.TaskResult result) { + final List completeWaiters; + ChunkLoadTask.EntityDataLoadTask entityDataLoadTask = null; + boolean scheduleEntityTask = false; + ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + final List waiters = this.entityDataLoadTaskWaiters; + this.entityDataLoadTask = null; + if (result != null) { + this.entityDataLoadTaskWaiters = null; + this.pendingEntityChunk = result.left() == null ? EMPTY_ENTITY_CHUNK : result.left(); + if (result.right() != null) { + LOGGER.error("Unhandled entity data load exception, data data will be lost: ", result.right()); + } + + for (final GenericDataLoadTaskCallback callback : waiters) { + callback.markCompleted(); + } + + completeWaiters = waiters; + } else { + // cancelled + completeWaiters = null; + + // need to re-schedule? + if (waiters.isEmpty()) { + this.entityDataLoadTaskWaiters = null; + // no tasks to schedule _for_ + } else { + entityDataLoadTask = this.entityDataLoadTask = new ChunkLoadTask.EntityDataLoadTask( + this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() + ); + entityDataLoadTask.addCallback(this::completeEntityLoad); + // need one schedule() per waiter + for (final GenericDataLoadTaskCallback callback : waiters) { + scheduleEntityTask |= entityDataLoadTask.schedule(true); + } + } + } + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + + if (scheduleEntityTask) { + entityDataLoadTask.scheduleNow(); + } + + // avoid holding the scheduling lock while completing + if (completeWaiters != null) { + for (final GenericDataLoadTaskCallback callback : completeWaiters) { + callback.acceptCompleted(result); + } + } + + schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + this.checkUnload(); + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } + + // note: it is guaranteed that the consumer cannot be called for the entirety that the schedule lock is held + // however, when the consumer is invoked, it will hold the schedule lock + public GenericDataLoadTaskCallback getOrLoadEntityData(final Consumer> consumer) { + if (this.isEntityChunkNBTLoaded()) { + throw new IllegalStateException("Cannot load entity data, it is already loaded"); + } + // why not just acquire the lock? because the caller NEEDS to call isEntityChunkNBTLoaded before this! + if (!this.scheduler.schedulingLockArea.isHeldByCurrentThread(this.chunkX, this.chunkZ)) { + throw new IllegalStateException("Must hold scheduling lock"); + } + + final GenericDataLoadTaskCallback ret = new EntityDataLoadTaskCallback((Consumer)consumer, this); + + if (this.entityDataLoadTask == null) { + this.entityDataLoadTask = new ChunkLoadTask.EntityDataLoadTask( + this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() + ); + this.entityDataLoadTask.addCallback(this::completeEntityLoad); + this.entityDataLoadTaskWaiters = new ArrayList<>(); + } + this.entityDataLoadTaskWaiters.add(ret); + if (this.entityDataLoadTask.schedule(true)) { + ret.schedule = this.entityDataLoadTask; + } + this.checkUnload(); + + return ret; + } + + private static final class EntityDataLoadTaskCallback extends GenericDataLoadTaskCallback { + + public EntityDataLoadTaskCallback(final Consumer> consumer, final NewChunkHolder chunkHolder) { + super(consumer, chunkHolder); + } + + @Override + void internalCancel() { + this.chunkHolder.entityDataLoadTaskWaiters.remove(this); + this.chunkHolder.entityDataLoadTask.cancel(); + } + } + + private PoiChunk poiChunk; + + private ChunkLoadTask.PoiDataLoadTask poiDataLoadTask; + // note: if entityDataLoadTask is cancelled, but on its completion entityDataLoadTaskWaiters.size() != 0, + // then the task is rescheduled + private List poiDataLoadTaskWaiters; + + public ChunkLoadTask.PoiDataLoadTask getPoiDataLoadTask() { + return this.poiDataLoadTask; + } + + // must hold schedule lock for the two below functions + + public boolean isPoiChunkLoaded() { + return this.poiChunk != null; + } + + private void completePoiLoad(final GenericDataLoadTask.TaskResult result) { + final List completeWaiters; + ChunkLoadTask.PoiDataLoadTask poiDataLoadTask = null; + boolean schedulePoiTask = false; + ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + final List waiters = this.poiDataLoadTaskWaiters; + this.poiDataLoadTask = null; + if (result != null) { + this.poiDataLoadTaskWaiters = null; + this.poiChunk = result.left(); + if (result.right() != null) { + LOGGER.error("Unhandled poi load exception, poi data will be lost: ", result.right()); + } + + for (final GenericDataLoadTaskCallback callback : waiters) { + callback.markCompleted(); + } + + completeWaiters = waiters; + } else { + // cancelled + completeWaiters = null; + + // need to re-schedule? + if (waiters.isEmpty()) { + this.poiDataLoadTaskWaiters = null; + // no tasks to schedule _for_ + } else { + poiDataLoadTask = this.poiDataLoadTask = new ChunkLoadTask.PoiDataLoadTask( + this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() + ); + poiDataLoadTask.addCallback(this::completePoiLoad); + // need one schedule() per waiter + for (final GenericDataLoadTaskCallback callback : waiters) { + schedulePoiTask |= poiDataLoadTask.schedule(true); + } + } + } + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + + if (schedulePoiTask) { + poiDataLoadTask.scheduleNow(); + } + + // avoid holding the scheduling lock while completing + if (completeWaiters != null) { + for (final GenericDataLoadTaskCallback callback : completeWaiters) { + callback.acceptCompleted(result); + } + } + schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + this.checkUnload(); + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } + + // note: it is guaranteed that the consumer cannot be called for the entirety that the schedule lock is held + // however, when the consumer is invoked, it will hold the schedule lock + public GenericDataLoadTaskCallback getOrLoadPoiData(final Consumer> consumer) { + if (this.isPoiChunkLoaded()) { + throw new IllegalStateException("Cannot load poi data, it is already loaded"); + } + // why not just acquire the lock? because the caller NEEDS to call isPoiChunkLoaded before this! + if (!this.scheduler.schedulingLockArea.isHeldByCurrentThread(this.chunkX, this.chunkZ)) { + throw new IllegalStateException("Must hold scheduling lock"); + } + + final GenericDataLoadTaskCallback ret = new PoiDataLoadTaskCallback((Consumer)consumer, this); + + if (this.poiDataLoadTask == null) { + this.poiDataLoadTask = new ChunkLoadTask.PoiDataLoadTask( + this.scheduler, this.world, this.chunkX, this.chunkZ, this.getEffectivePriority() + ); + this.poiDataLoadTask.addCallback(this::completePoiLoad); + this.poiDataLoadTaskWaiters = new ArrayList<>(); + } + this.poiDataLoadTaskWaiters.add(ret); + if (this.poiDataLoadTask.schedule(true)) { + ret.schedule = this.poiDataLoadTask; + } + this.checkUnload(); + + return ret; + } + + private static final class PoiDataLoadTaskCallback extends GenericDataLoadTaskCallback { + + public PoiDataLoadTaskCallback(final Consumer> consumer, final NewChunkHolder chunkHolder) { + super(consumer, chunkHolder); + } + + @Override + void internalCancel() { + this.chunkHolder.poiDataLoadTaskWaiters.remove(this); + this.chunkHolder.poiDataLoadTask.cancel(); + } + } + + public static abstract class GenericDataLoadTaskCallback implements Cancellable { + + protected final Consumer> consumer; + protected final NewChunkHolder chunkHolder; + protected boolean completed; + protected GenericDataLoadTask schedule; + protected final AtomicBoolean scheduled = new AtomicBoolean(); + + public GenericDataLoadTaskCallback(final Consumer> consumer, + final NewChunkHolder chunkHolder) { + this.consumer = consumer; + this.chunkHolder = chunkHolder; + } + + public void schedule() { + if (this.scheduled.getAndSet(true)) { + throw new IllegalStateException("Double calling schedule()"); + } + if (this.schedule != null) { + this.schedule.scheduleNow(); + this.schedule = null; + } + } + + boolean isCompleted() { + return this.completed; + } + + // must hold scheduling lock + private boolean setCompleted() { + if (this.completed) { + return false; + } + return this.completed = true; + } + + // must hold scheduling lock + void markCompleted() { + if (this.completed) { + throw new IllegalStateException("May not be completed here"); + } + this.completed = true; + } + + void acceptCompleted(final GenericDataLoadTask.TaskResult result) { + if (result != null) { + if (this.completed) { + this.consumer.accept(result); + } else { + throw new IllegalStateException("Cannot be uncompleted at this point"); + } + } else { + throw new NullPointerException("Result cannot be null (cancelled)"); + } + } + + // holds scheduling lock + abstract void internalCancel(); + + @Override + public boolean cancel() { + final NewChunkHolder holder = this.chunkHolder; // Folia - use area based lock to reduce contention + final ReentrantAreaLock.Node schedulingLock = holder.scheduler.schedulingLockArea.lock(holder.chunkX, holder.chunkZ); + try { + if (!this.completed) { + this.completed = true; + this.internalCancel(); + return true; + } + return false; + } finally { + holder.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } + } + + private ChunkAccess currentChunk; + + // generation status state + + /** + * Current status the chunk has been brought up to by the chunk system. null indicates no work at all + */ + private ChunkStatus currentGenStatus; + + // This allows unsynchronised access to the chunk and last gen status + private volatile ChunkCompletion lastChunkCompletion; + + public ChunkCompletion getLastChunkCompletion() { + return this.lastChunkCompletion; + } + + public static final record ChunkCompletion(ChunkAccess chunk, ChunkStatus genStatus) {}; + + /** + * The target final chunk status the chunk system will bring the chunk to. + */ + private ChunkStatus requestedGenStatus; + + private ChunkProgressionTask generationTask; + private ChunkStatus generationTaskStatus; + + /** + * contains the neighbours that this chunk generation is blocking on + */ + protected final ReferenceLinkedOpenHashSet neighboursBlockingGenTask = new ReferenceLinkedOpenHashSet<>(4); + + /** + * map of ChunkHolder -> Required Status for this chunk + */ + protected final Reference2ObjectLinkedOpenHashMap neighboursWaitingForUs = new Reference2ObjectLinkedOpenHashMap<>(); + + public void addGenerationBlockingNeighbour(final NewChunkHolder neighbour) { + this.neighboursBlockingGenTask.add(neighbour); + } + + public void addWaitingNeighbour(final NewChunkHolder neighbour, final ChunkStatus requiredStatus) { + final boolean wasEmpty = this.neighboursWaitingForUs.isEmpty(); + this.neighboursWaitingForUs.put(neighbour, requiredStatus); + if (wasEmpty) { + this.checkUnload(); + } + } + + // priority state + + // the target priority for this chunk to generate at + // TODO this will screw over scheduling at lower priorities to neighbours, fix + private PrioritisedExecutor.Priority priority = PrioritisedExecutor.Priority.NORMAL; + private boolean priorityLocked; + + // the priority neighbouring chunks have requested this chunk generate at + private PrioritisedExecutor.Priority neighbourRequestedPriority = PrioritisedExecutor.Priority.IDLE; + + public PrioritisedExecutor.Priority getEffectivePriority() { + return PrioritisedExecutor.Priority.max(this.priority, this.neighbourRequestedPriority); + } + + protected void recalculateNeighbourRequestedPriority() { + if (this.neighboursWaitingForUs.isEmpty()) { + this.neighbourRequestedPriority = PrioritisedExecutor.Priority.IDLE; + return; + } + + PrioritisedExecutor.Priority max = PrioritisedExecutor.Priority.IDLE; + + for (final NewChunkHolder holder : this.neighboursWaitingForUs.keySet()) { + final PrioritisedExecutor.Priority neighbourPriority = holder.getEffectivePriority(); + if (neighbourPriority.isHigherPriority(max)) { + max = neighbourPriority; + } + } + + final PrioritisedExecutor.Priority current = this.getEffectivePriority(); + this.neighbourRequestedPriority = max; + final PrioritisedExecutor.Priority next = this.getEffectivePriority(); + + if (current == next) { + return; + } + + // our effective priority has changed, so change our task + if (this.generationTask != null) { + this.generationTask.setPriority(next); + } + + // now propagate this to our neighbours + this.recalculateNeighbourPriorities(); + } + + public void recalculateNeighbourPriorities() { + for (final NewChunkHolder holder : this.neighboursBlockingGenTask) { + holder.recalculateNeighbourRequestedPriority(); + } + } + + // must hold scheduling lock + public void raisePriority(final PrioritisedExecutor.Priority priority) { + if (this.priority != null && this.priority.isHigherOrEqualPriority(priority)) { + return; + } + this.setPriority(priority); + } + + private void lockPriority() { + this.priority = PrioritisedExecutor.Priority.NORMAL; + this.priorityLocked = true; + } + + // must hold scheduling lock + public void setPriority(final PrioritisedExecutor.Priority priority) { + if (this.priorityLocked) { + return; + } + final PrioritisedExecutor.Priority old = this.getEffectivePriority(); + this.priority = priority; + final PrioritisedExecutor.Priority newPriority = this.getEffectivePriority(); + + if (old != newPriority) { + if (this.generationTask != null) { + this.generationTask.setPriority(newPriority); + } + } + + this.recalculateNeighbourPriorities(); + } + + // must hold scheduling lock + public void lowerPriority(final PrioritisedExecutor.Priority priority) { + if (this.priority != null && this.priority.isLowerOrEqualPriority(priority)) { + return; + } + this.setPriority(priority); + } + + // error handling state + private ChunkStatus failedGenStatus; + private Throwable genTaskException; + private Thread genTaskFailedThread; + + private boolean failedLightUpdate; + + public void failedLightUpdate() { + this.failedLightUpdate = true; + } + + public boolean hasFailedGeneration() { + return this.genTaskException != null; + } + + // ticket level state + private int oldTicketLevel = ChunkLevel.MAX_LEVEL + 1; + private int currentTicketLevel = ChunkLevel.MAX_LEVEL + 1; + + public int getTicketLevel() { + return this.currentTicketLevel; + } + + public final ChunkHolder vanillaChunkHolder; + + public NewChunkHolder(final ServerLevel world, final int chunkX, final int chunkZ, final ChunkTaskScheduler scheduler) { + this.world = world; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.scheduler = scheduler; + this.vanillaChunkHolder = new ChunkHolder(new ChunkPos(chunkX, chunkZ), world, world.getLightEngine(), world.chunkSource.chunkMap, this); + } + + protected ImposterProtoChunk wrappedChunkForNeighbour; + + // holds scheduling lock + public ChunkAccess getChunkForNeighbourAccess() { + // Vanilla overrides the status futures with an imposter chunk to prevent writes to full chunks + // But we don't store per-status futures, so we need this hack + if (this.wrappedChunkForNeighbour != null) { + return this.wrappedChunkForNeighbour; + } + final ChunkAccess ret = this.currentChunk; + return ret instanceof LevelChunk fullChunk ? this.wrappedChunkForNeighbour = new ImposterProtoChunk(fullChunk, false) : ret; + } + + public ChunkAccess getCurrentChunk() { + return this.currentChunk; + } + + int getCurrentTicketLevel() { + return this.currentTicketLevel; + } + + void updateTicketLevel(final int toLevel) { + this.currentTicketLevel = toLevel; + } + + private int totalNeighboursUsingThisChunk = 0; + + // holds schedule lock + public void addNeighbourUsingChunk() { + final int now = ++this.totalNeighboursUsingThisChunk; + + if (now == 1) { + this.checkUnload(); + } + } + + // holds schedule lock + public void removeNeighbourUsingChunk() { + final int now = --this.totalNeighboursUsingThisChunk; + + if (now == 0) { + this.checkUnload(); + } + + if (now < 0) { + throw new IllegalStateException("Neighbours using this chunk cannot be negative"); + } + } + + // must hold scheduling lock + // returns string reason for why chunk should remain loaded, null otherwise + public final String isSafeToUnload() { + // is ticket level below threshold? + if (this.oldTicketLevel <= ChunkHolderManager.MAX_TICKET_LEVEL) { + return "ticket_level"; + } + + // are we being used by another chunk for generation? + if (this.totalNeighboursUsingThisChunk != 0) { + return "neighbours_generating"; + } + + // are we going to be used by another chunk for generation? + if (!this.neighboursWaitingForUs.isEmpty()) { + return "neighbours_waiting"; + } + + // chunk must be marked inaccessible (i.e unloaded to plugins) + if (this.getChunkStatus() != FullChunkStatus.INACCESSIBLE) { + return "fullchunkstatus"; + } + + // are we currently generating anything, or have requested generation? + if (this.generationTask != null) { + return "generating"; + } + if (this.requestedGenStatus != null) { + return "requested_generation"; + } + + // entity data requested? + if (this.entityDataLoadTask != null) { + return "entity_data_requested"; + } + + // poi data requested? + if (this.poiDataLoadTask != null) { + return "poi_data_requested"; + } + + // are we pending serialization? + if (this.entityDataUnload != null) { + return "entity_serialization"; + } + if (this.poiDataUnload != null) { + return "poi_serialization"; + } + if (this.chunkDataUnload != null) { + return "chunk_serialization"; + } + + // Note: light tasks do not need a check, as they add a ticket. + + // nothing is using this chunk, so it should be unloaded + return null; + } + + /** Unloaded from chunk map */ + boolean killed; + + // must hold scheduling lock + private void checkUnload() { + if (this.killed) { + return; + } + if (this.isSafeToUnload() == null) { + // ensure in unload queue + this.scheduler.chunkHolderManager.unloadQueue.addChunk(this.chunkX, this.chunkZ); + } else { + // ensure not in unload queue + this.scheduler.chunkHolderManager.unloadQueue.removeChunk(this.chunkX, this.chunkZ); + } + } + + static final record UnloadState(NewChunkHolder holder, ChunkAccess chunk, ChunkEntitySlices entityChunk, PoiChunk poiChunk) {}; + + // note: these are completed with null to indicate that no write occurred + // they are also completed with null to indicate a null write occurred + private UnloadTask chunkDataUnload; + private UnloadTask entityDataUnload; + private UnloadTask poiDataUnload; + + public static final record UnloadTask(Completable completable, DelayedPrioritisedTask task) {} + + public UnloadTask getUnloadTask(final RegionFileIOThread.RegionFileType type) { + switch (type) { + case CHUNK_DATA: + return this.chunkDataUnload; + case ENTITY_DATA: + return this.entityDataUnload; + case POI_DATA: + return this.poiDataUnload; + default: + throw new IllegalStateException("Unknown regionfile type " + type); + } + } + + private UnloadState unloadState; + + // holds schedule lock + UnloadState unloadStage1() { + // because we hold the scheduling lock, we cannot actually unload anything + // so we need to null this chunk's state + ChunkAccess chunk = this.currentChunk; + ChunkEntitySlices entityChunk = this.entityChunk; + PoiChunk poiChunk = this.poiChunk; + // chunk state + this.currentChunk = null; + this.currentGenStatus = null; + this.wrappedChunkForNeighbour = null; + this.lastChunkCompletion = null; + // entity chunk state + this.entityChunk = null; + this.pendingEntityChunk = null; + + // poi chunk state + this.poiChunk = null; + + // priority state + this.priorityLocked = false; + + if (chunk != null) { + this.chunkDataUnload = new UnloadTask(new Completable<>(), new DelayedPrioritisedTask(PrioritisedExecutor.Priority.NORMAL)); + } + if (poiChunk != null) { + this.poiDataUnload = new UnloadTask(new Completable<>(), null); + } + if (entityChunk != null) { + this.entityDataUnload = new UnloadTask(new Completable<>(), null); + } + + return this.unloadState = (chunk != null || entityChunk != null || poiChunk != null) ? new UnloadState(this, chunk, entityChunk, poiChunk) : null; + } + + // data is null if failed or does not need to be saved + void completeAsyncChunkDataSave(final CompoundTag data) { + if (data != null) { + RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, data, RegionFileIOThread.RegionFileType.CHUNK_DATA); + } + this.chunkDataUnload.completable().complete(data); + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + // can only write to these fields while holding the schedule lock + this.chunkDataUnload = null; + this.checkUnload(); + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } + + void unloadStage2(final UnloadState state) { + this.unloadState = null; + final ChunkAccess chunk = state.chunk(); + final ChunkEntitySlices entityChunk = state.entityChunk(); + final PoiChunk poiChunk = state.poiChunk(); + + final boolean shouldLevelChunkNotSave = (chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave); + + // unload chunk data + if (chunk != null) { + if (chunk instanceof LevelChunk levelChunk) { + levelChunk.setLoaded(false); + } + + if (!shouldLevelChunkNotSave) { + this.saveChunk(chunk, true); + } else { + this.completeAsyncChunkDataSave(null); + } + + if (chunk instanceof LevelChunk levelChunk) { + this.world.unload(levelChunk); + } + } + + // unload entity data + if (entityChunk != null) { + this.saveEntities(entityChunk, true); + // yes this is a hack to pass the compound tag through... + final CompoundTag lastEntityUnload = this.lastEntityUnload; + this.lastEntityUnload = null; + + if (entityChunk.unload()) { + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + entityChunk.setTransient(true); + this.entityChunk = entityChunk; + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } else { + this.world.getEntityLookup().entitySectionUnload(this.chunkX, this.chunkZ); + } + // we need to delay the callback until after determining transience, otherwise a potential loader could + // set entityChunk before we do + this.entityDataUnload.completable().complete(lastEntityUnload); + } + + // unload poi data + if (poiChunk != null) { + if (poiChunk.isDirty() && !shouldLevelChunkNotSave) { + this.savePOI(poiChunk, true); + } else { + this.poiDataUnload.completable().complete(null); + } + + if (poiChunk.isLoaded()) { + this.world.getPoiManager().onUnload(CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ)); + } + } + } + + boolean unloadStage3() { + // can only write to these while holding the schedule lock, and we instantly complete them in stage2 + this.poiDataUnload = null; + this.entityDataUnload = null; + + // we need to check if anything has been loaded in the meantime (or if we have transient entities) + if (this.entityChunk != null || this.poiChunk != null || this.currentChunk != null) { + return false; + } + + return this.isSafeToUnload() == null; + } + + private void cancelGenTask() { + if (this.generationTask != null) { + this.generationTask.cancel(); + } else { + // otherwise, we are blocking on neighbours, so remove them + if (!this.neighboursBlockingGenTask.isEmpty()) { + for (final NewChunkHolder neighbour : this.neighboursBlockingGenTask) { + if (neighbour.neighboursWaitingForUs.remove(this) == null) { + throw new IllegalStateException("Corrupt state"); + } + if (neighbour.neighboursWaitingForUs.isEmpty()) { + neighbour.checkUnload(); + } + } + this.neighboursBlockingGenTask.clear(); + this.checkUnload(); + } + } + } + + // holds: ticket level update lock + // holds: schedule lock + public void processTicketLevelUpdate(final List scheduledTasks, final List changedLoadStatus) { + final int oldLevel = this.oldTicketLevel; + final int newLevel = this.currentTicketLevel; + + if (oldLevel == newLevel) { + return; + } + + this.oldTicketLevel = newLevel; + + final FullChunkStatus oldState = ChunkLevel.fullStatus(oldLevel); + final FullChunkStatus newState = ChunkLevel.fullStatus(newLevel); + final boolean oldUnloaded = oldLevel > ChunkHolderManager.MAX_TICKET_LEVEL; + final boolean newUnloaded = newLevel > ChunkHolderManager.MAX_TICKET_LEVEL; + + final ChunkStatus maxGenerationStatusOld = ChunkLevel.generationStatus(oldLevel); + final ChunkStatus maxGenerationStatusNew = ChunkLevel.generationStatus(newLevel); + + // check for cancellations from downgrading ticket level + if (this.requestedGenStatus != null && !newState.isOrAfter(FullChunkStatus.FULL) && newLevel > oldLevel) { + // note: cancel() may invoke onChunkGenComplete synchronously here + if (newUnloaded) { + // need to cancel all tasks + // note: requested status must be set to null here before cancellation, to indicate to the + // completion logic that we do not want rescheduling to occur + this.requestedGenStatus = null; + this.cancelGenTask(); + } else { + final ChunkStatus toCancel = maxGenerationStatusNew.getNextStatus(); + final ChunkStatus currentRequestedStatus = this.requestedGenStatus; + + if (currentRequestedStatus.isOrAfter(toCancel)) { + // we do have to cancel something here + // clamp requested status to the maximum + if (this.currentGenStatus != null && this.currentGenStatus.isOrAfter(maxGenerationStatusNew)) { + // already generated to status, so we must cancel + this.requestedGenStatus = null; + this.cancelGenTask(); + } else { + // not generated to status, so we may have to cancel + // note: gen task is always 1 status above current gen status if not null + this.requestedGenStatus = maxGenerationStatusNew; + if (this.generationTaskStatus != null && this.generationTaskStatus.isOrAfter(toCancel)) { + // TOOD is this even possible? i don't think so + throw new IllegalStateException("?????"); + } + } + } + } + } + + if (newState != oldState) { + if (newState.isOrAfter(oldState)) { + // status upgrade + if (!oldState.isOrAfter(FullChunkStatus.FULL) && newState.isOrAfter(FullChunkStatus.FULL)) { + // may need to schedule full load + if (this.currentGenStatus != ChunkStatus.FULL) { + if (this.requestedGenStatus != null) { + this.requestedGenStatus = ChunkStatus.FULL; + } else { + this.scheduler.schedule( + this.chunkX, this.chunkZ, ChunkStatus.FULL, this, scheduledTasks + ); + } + } else { + // now we are fully loaded + this.queueBorderFullStatus(true, changedLoadStatus); + } + } + } else { + // status downgrade + if (!newState.isOrAfter(FullChunkStatus.ENTITY_TICKING) && oldState.isOrAfter(FullChunkStatus.ENTITY_TICKING)) { + this.completeFullStatusConsumers(FullChunkStatus.ENTITY_TICKING, null); + } + + if (!newState.isOrAfter(FullChunkStatus.BLOCK_TICKING) && oldState.isOrAfter(FullChunkStatus.BLOCK_TICKING)) { + this.completeFullStatusConsumers(FullChunkStatus.BLOCK_TICKING, null); + } + + if (!newState.isOrAfter(FullChunkStatus.FULL) && oldState.isOrAfter(FullChunkStatus.FULL)) { + this.completeFullStatusConsumers(FullChunkStatus.FULL, null); + } + } + } + + if (oldState != newState) { + if (this.onTicketUpdate(oldState, newState)) { + changedLoadStatus.add(this); + } + } + + if (oldUnloaded != newUnloaded) { + this.checkUnload(); + } + } + + /* + For full chunks, vanilla just loads chunks around it up to FEATURES, 1 radius + + For ticking chunks, it updates the persistent entity manager (soon to be completely nuked by EntitySliceManager, which + will also need to be updated but with far less implications) + It also shoves the scheduled block ticks into the tick scheduler + + For entity ticking chunks, updates the entity manager (see above) + */ + + static final int NEIGHBOUR_RADIUS = 2; + private long fullNeighbourChunksLoadedBitset; + + private static int getFullNeighbourIndex(final int relativeX, final int relativeZ) { + // index = (relativeX + NEIGHBOUR_CACHE_RADIUS) + (relativeZ + NEIGHBOUR_CACHE_RADIUS) * (NEIGHBOUR_CACHE_RADIUS * 2 + 1) + // optimised variant of the above by moving some of the ops to compile time + return relativeX + (relativeZ * (NEIGHBOUR_RADIUS * 2 + 1)) + (NEIGHBOUR_RADIUS + NEIGHBOUR_RADIUS * ((NEIGHBOUR_RADIUS * 2 + 1))); + } + public final boolean isNeighbourFullLoaded(final int relativeX, final int relativeZ) { + return (this.fullNeighbourChunksLoadedBitset & (1L << getFullNeighbourIndex(relativeX, relativeZ))) != 0; + } + + // returns true if this chunk changed full status + public final boolean setNeighbourFullLoaded(final int relativeX, final int relativeZ) { + final long before = this.fullNeighbourChunksLoadedBitset; + final int index = getFullNeighbourIndex(relativeX, relativeZ); + this.fullNeighbourChunksLoadedBitset |= (1L << index); + return this.onNeighbourChange(before, this.fullNeighbourChunksLoadedBitset); + } + + // returns true if this chunk changed full status + public final boolean setNeighbourFullUnloaded(final int relativeX, final int relativeZ) { + final long before = this.fullNeighbourChunksLoadedBitset; + final int index = getFullNeighbourIndex(relativeX, relativeZ); + this.fullNeighbourChunksLoadedBitset &= ~(1L << index); + return this.onNeighbourChange(before, this.fullNeighbourChunksLoadedBitset); + } + + public static boolean areNeighboursFullLoaded(final long bitset, final int radius) { + // index = relativeX + (relativeZ * (NEIGHBOUR_CACHE_RADIUS * 2 + 1)) + (NEIGHBOUR_CACHE_RADIUS + NEIGHBOUR_CACHE_RADIUS * ((NEIGHBOUR_CACHE_RADIUS * 2 + 1))) + switch (radius) { + case 0: { + return (bitset & (1L << getFullNeighbourIndex(0, 0))) != 0L; + } + case 1: { + long mask = 0L; + for (int dx = -1; dx <= 1; ++dx) { + for (int dz = -1; dz <= 1; ++dz) { + mask |= (1L << getFullNeighbourIndex(dx, dz)); + } + } + return (bitset & mask) == mask; + } + case 2: { + long mask = 0L; + for (int dx = -2; dx <= 2; ++dx) { + for (int dz = -2; dz <= 2; ++dz) { + mask |= (1L << getFullNeighbourIndex(dx, dz)); + } + } + return (bitset & mask) == mask; + } + + default: { + throw new IllegalArgumentException("Radius not recognized: " + radius); + } + } + } + + // upper 16 bits are pending status, lower 16 bits are current status + private volatile long chunkStatus; + private static final long PENDING_STATUS_MASK = Long.MIN_VALUE >> 31; + private static final FullChunkStatus[] CHUNK_STATUS_BY_ID = FullChunkStatus.values(); + private static final VarHandle CHUNK_STATUS_HANDLE = ConcurrentUtil.getVarHandle(NewChunkHolder.class, "chunkStatus", long.class); + + public static FullChunkStatus getCurrentChunkStatus(final long encoded) { + return CHUNK_STATUS_BY_ID[(int)encoded]; + } + + public static FullChunkStatus getPendingChunkStatus(final long encoded) { + return CHUNK_STATUS_BY_ID[(int)(encoded >>> 32)]; + } + + public FullChunkStatus getChunkStatus() { + return getCurrentChunkStatus(((long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this))); + } + + public boolean isEntityTickingReady() { + return this.getChunkStatus().isOrAfter(FullChunkStatus.ENTITY_TICKING); + } + + public boolean isTickingReady() { + return this.getChunkStatus().isOrAfter(FullChunkStatus.BLOCK_TICKING); + } + + public boolean isFullChunkReady() { + return this.getChunkStatus().isOrAfter(FullChunkStatus.FULL); + } + + private static FullChunkStatus getStatusForBitset(final long bitset) { + if (areNeighboursFullLoaded(bitset, 2)) { + return FullChunkStatus.ENTITY_TICKING; + } else if (areNeighboursFullLoaded(bitset, 1)) { + return FullChunkStatus.BLOCK_TICKING; + } else if (areNeighboursFullLoaded(bitset, 0)) { + return FullChunkStatus.FULL; + } else { + return FullChunkStatus.INACCESSIBLE; + } + } + + // note: only while updating ticket level, so holds ticket update lock + scheduling lock + protected final boolean onTicketUpdate(final FullChunkStatus oldState, final FullChunkStatus newState) { + if (oldState == newState) { + return false; + } + + // preserve border request after full status complete, as it does not set anything in the bitset + FullChunkStatus byNeighbours = getStatusForBitset(this.fullNeighbourChunksLoadedBitset); + if (byNeighbours == FullChunkStatus.INACCESSIBLE && newState.isOrAfter(FullChunkStatus.FULL) && this.currentGenStatus == ChunkStatus.FULL) { + byNeighbours = FullChunkStatus.FULL; + } + + final FullChunkStatus toSet; + + if (newState.isOrAfter(byNeighbours)) { + // must clamp to neighbours level, even though we have the ticket level + toSet = byNeighbours; + } else { + // must clamp to ticket level, even though we have the neighbours + toSet = newState; + } + + long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this); + + if (curr == ((long)toSet.ordinal() | ((long)toSet.ordinal() << 32))) { + // nothing to do + return false; + } + + int failures = 0; + for (;;) { + final long update = (curr & ~PENDING_STATUS_MASK) | ((long)toSet.ordinal() << 32); + if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { + return true; + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + protected final boolean onNeighbourChange(final long bitsetBefore, final long bitsetAfter) { + FullChunkStatus oldState = getStatusForBitset(bitsetBefore); + FullChunkStatus newState = getStatusForBitset(bitsetAfter); + final FullChunkStatus currStateTicketLevel = ChunkLevel.fullStatus(this.oldTicketLevel); + if (oldState.isOrAfter(currStateTicketLevel)) { + oldState = currStateTicketLevel; + } + if (newState.isOrAfter(currStateTicketLevel)) { + newState = currStateTicketLevel; + } + // preserve border request after full status complete, as it does not set anything in the bitset + if (newState == FullChunkStatus.INACCESSIBLE && currStateTicketLevel.isOrAfter(FullChunkStatus.FULL) && this.currentGenStatus == ChunkStatus.FULL) { + newState = FullChunkStatus.FULL; + } + + if (oldState == newState) { + return false; + } + + int failures = 0; + for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) { + final long update = (curr & ~PENDING_STATUS_MASK) | ((long)newState.ordinal() << 32); + if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { + return true; + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + private boolean queueBorderFullStatus(final boolean loaded, final List changedFullStatus) { + final FullChunkStatus toStatus = loaded ? FullChunkStatus.FULL : FullChunkStatus.INACCESSIBLE; + + int failures = 0; + for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) { + final FullChunkStatus currPending = getPendingChunkStatus(curr); + if (loaded && currPending != FullChunkStatus.INACCESSIBLE) { + throw new IllegalStateException("Expected " + FullChunkStatus.INACCESSIBLE + " for pending, but got " + currPending); + } + + final long update = (curr & ~PENDING_STATUS_MASK) | ((long)toStatus.ordinal() << 32); + if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { + if ((int)(update) != (int)(update >>> 32)) { + changedFullStatus.add(this); + return true; + } + return false; + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + // only call on main thread, must hold ticket level and scheduling lock + private void onFullChunkLoadChange(final boolean loaded, final List changedFullStatus) { + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ, NEIGHBOUR_RADIUS); + try { + for (int dz = -NEIGHBOUR_RADIUS; dz <= NEIGHBOUR_RADIUS; ++dz) { + for (int dx = -NEIGHBOUR_RADIUS; dx <= NEIGHBOUR_RADIUS; ++dx) { + final NewChunkHolder holder = (dx | dz) == 0 ? this : this.scheduler.chunkHolderManager.getChunkHolder(dx + this.chunkX, dz + this.chunkZ); + if (loaded) { + if (holder.setNeighbourFullLoaded(-dx, -dz)) { + changedFullStatus.add(holder); + } + } else { + if (holder != null && holder.setNeighbourFullUnloaded(-dx, -dz)) { + changedFullStatus.add(holder); + } + } + } + } + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } + + private FullChunkStatus updateCurrentState(final FullChunkStatus to) { + int failures = 0; + for (long curr = (long)CHUNK_STATUS_HANDLE.getVolatile((NewChunkHolder)this);;) { + final long update = (curr & PENDING_STATUS_MASK) | (long)to.ordinal(); + if (curr == (curr = (long)CHUNK_STATUS_HANDLE.compareAndExchange((NewChunkHolder)this, curr, update))) { + return getPendingChunkStatus(curr); + } + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + private void changeEntityChunkStatus(final FullChunkStatus toStatus) { + this.world.getEntityLookup().chunkStatusChange(this.chunkX, this.chunkZ, toStatus); + } + + private boolean processingFullStatus = false; + + // only to be called on the main thread, no locks need to be held + public boolean handleFullStatusChange(final List changedFullStatus) { + TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot update full status thread off-main"); + + boolean ret = false; + + if (this.processingFullStatus) { + // we cannot process updates recursively + return ret; + } + + // note: use opaque reads for chunk status read since we need it to be atomic + + // test if anything changed + long statusCheck = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this); + if ((int)statusCheck == (int)(statusCheck >>> 32)) { + // nothing changed + return ret; + } + + final ChunkTaskScheduler scheduler = this.scheduler; + final ChunkHolderManager holderManager = scheduler.chunkHolderManager; + final int ticketKeep; + final Long ticketId = Long.valueOf(holderManager.getNextStatusUpgradeId()); + final ReentrantAreaLock.Node ticketLock = holderManager.ticketLockArea.lock(this.chunkX, this.chunkZ); + try { + ticketKeep = this.currentTicketLevel; + statusCheck = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this); + // handle race condition where ticket level and target status is updated concurrently + if ((int)statusCheck == (int)(statusCheck >>> 32)) { + // nothing changed + return ret; + } + holderManager.addTicketAtLevel(TicketType.STATUS_UPGRADE, CoordinateUtils.getChunkKey(this.chunkX, this.chunkZ), ticketKeep, ticketId, false); + } finally { + holderManager.ticketLockArea.unlock(ticketLock); + } + + this.processingFullStatus = true; + try { + for (;;) { + final long currStateEncoded = (long)CHUNK_STATUS_HANDLE.getOpaque((NewChunkHolder)this); + final FullChunkStatus currState = getCurrentChunkStatus(currStateEncoded); + FullChunkStatus nextState = getPendingChunkStatus(currStateEncoded); + if (currState == nextState) { + if (nextState == FullChunkStatus.INACCESSIBLE) { + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ); + try { + this.checkUnload(); + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + } + break; + } + + // chunks cannot downgrade state while status is pending a change + final LevelChunk chunk = (LevelChunk)this.currentChunk; + + // Note: we assume that only load/unload contain plugin logic + // plugin logic is anything stupid enough to possibly change the chunk status while it is already + // being changed (i.e during load it is possible it will try to set to full ticking) + // in order to allow this change, we also need this plugin logic to be contained strictly after all + // of the chunk system load callbacks are invoked + if (nextState.isOrAfter(currState)) { + // state upgrade + if (!currState.isOrAfter(FullChunkStatus.FULL) && nextState.isOrAfter(FullChunkStatus.FULL)) { + nextState = this.updateCurrentState(FullChunkStatus.FULL); + holderManager.ensureInAutosave(this); + chunk.pushChunkIntoLoadedMap(); + this.changeEntityChunkStatus(FullChunkStatus.FULL); + chunk.onChunkLoad(this); + this.onFullChunkLoadChange(true, changedFullStatus); + this.completeFullStatusConsumers(FullChunkStatus.FULL, chunk); + } + + if (!currState.isOrAfter(FullChunkStatus.BLOCK_TICKING) && nextState.isOrAfter(FullChunkStatus.BLOCK_TICKING)) { + nextState = this.updateCurrentState(FullChunkStatus.BLOCK_TICKING); + this.changeEntityChunkStatus(FullChunkStatus.BLOCK_TICKING); + chunk.onChunkTicking(this); + this.completeFullStatusConsumers(FullChunkStatus.BLOCK_TICKING, chunk); + } + + if (!currState.isOrAfter(FullChunkStatus.ENTITY_TICKING) && nextState.isOrAfter(FullChunkStatus.ENTITY_TICKING)) { + nextState = this.updateCurrentState(FullChunkStatus.ENTITY_TICKING); + this.changeEntityChunkStatus(FullChunkStatus.ENTITY_TICKING); + chunk.onChunkEntityTicking(this); + this.completeFullStatusConsumers(FullChunkStatus.ENTITY_TICKING, chunk); + } + } else { + if (currState.isOrAfter(FullChunkStatus.ENTITY_TICKING) && !nextState.isOrAfter(FullChunkStatus.ENTITY_TICKING)) { + this.changeEntityChunkStatus(FullChunkStatus.BLOCK_TICKING); + chunk.onChunkNotEntityTicking(this); + nextState = this.updateCurrentState(FullChunkStatus.BLOCK_TICKING); + } + + if (currState.isOrAfter(FullChunkStatus.BLOCK_TICKING) && !nextState.isOrAfter(FullChunkStatus.BLOCK_TICKING)) { + this.changeEntityChunkStatus(FullChunkStatus.FULL); + chunk.onChunkNotTicking(this); + nextState = this.updateCurrentState(FullChunkStatus.FULL); + } + + if (currState.isOrAfter(FullChunkStatus.FULL) && !nextState.isOrAfter(FullChunkStatus.FULL)) { + this.onFullChunkLoadChange(false, changedFullStatus); + this.changeEntityChunkStatus(FullChunkStatus.INACCESSIBLE); + chunk.onChunkUnload(this); + nextState = this.updateCurrentState(FullChunkStatus.INACCESSIBLE); + } + } + + ret = true; + } + } finally { + this.processingFullStatus = false; + holderManager.removeTicketAtLevel(TicketType.STATUS_UPGRADE, this.chunkX, this.chunkZ, ticketKeep, ticketId); + } + + return ret; + } + + // note: must hold scheduling lock + // rets true if the current requested gen status is not null (effectively, whether further scheduling is not needed) + boolean upgradeGenTarget(final ChunkStatus toStatus) { + if (toStatus == null) { + throw new NullPointerException("toStatus cannot be null"); + } + if (this.requestedGenStatus == null && this.generationTask == null) { + return false; + } + if (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(toStatus)) { + this.requestedGenStatus = toStatus; + } + return true; + } + + public void setGenerationTarget(final ChunkStatus toStatus) { + this.requestedGenStatus = toStatus; + } + + public boolean hasGenerationTask() { + return this.generationTask != null; + } + + public ChunkStatus getCurrentGenStatus() { + return this.currentGenStatus; + } + + public ChunkStatus getRequestedGenStatus() { + return this.requestedGenStatus; + } + + private final Reference2ObjectOpenHashMap>> statusWaiters = new Reference2ObjectOpenHashMap<>(); + + void addStatusConsumer(final ChunkStatus status, final Consumer consumer) { + this.statusWaiters.computeIfAbsent(status, (final ChunkStatus keyInMap) -> { + return new ArrayList<>(4); + }).add(consumer); + } + + private void completeStatusConsumers(ChunkStatus status, final ChunkAccess chunk) { + // need to tell future statuses to complete if cancelled + do { + this.completeStatusConsumers0(status, chunk); + } while (chunk == null && status != (status = status.getNextStatus())); + } + + private void completeStatusConsumers0(final ChunkStatus status, final ChunkAccess chunk) { + final List> consumers; + consumers = this.statusWaiters.remove(status); + + if (consumers == null) { + return; + } + + // must be scheduled to main, we do not trust the callback to not do anything stupid + this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> { + for (final Consumer consumer : consumers) { + try { + consumer.accept(chunk); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Failed to process chunk status callback", thr); + } + } + }, PrioritisedExecutor.Priority.HIGHEST); + } + + private final Reference2ObjectOpenHashMap>> fullStatusWaiters = new Reference2ObjectOpenHashMap<>(); + + void addFullStatusConsumer(final FullChunkStatus status, final Consumer consumer) { + this.fullStatusWaiters.computeIfAbsent(status, (final FullChunkStatus keyInMap) -> { + return new ArrayList<>(4); + }).add(consumer); + } + + private void completeFullStatusConsumers(FullChunkStatus status, final LevelChunk chunk) { + // need to tell future statuses to complete if cancelled + final FullChunkStatus max = CHUNK_STATUS_BY_ID[CHUNK_STATUS_BY_ID.length - 1]; + + for (;;) { + this.completeFullStatusConsumers0(status, chunk); + if (chunk != null || status == max) { + break; + } + status = CHUNK_STATUS_BY_ID[status.ordinal() + 1]; + } + } + + private void completeFullStatusConsumers0(final FullChunkStatus status, final LevelChunk chunk) { + final List> consumers; + consumers = this.fullStatusWaiters.remove(status); + + if (consumers == null) { + return; + } + + // must be scheduled to main, we do not trust the callback to not do anything stupid + this.scheduler.scheduleChunkTask(this.chunkX, this.chunkZ, () -> { + for (final Consumer consumer : consumers) { + try { + consumer.accept(chunk); + } catch (final ThreadDeath thr) { + throw thr; + } catch (final Throwable thr) { + LOGGER.error("Failed to process chunk status callback", thr); + } + } + }, PrioritisedExecutor.Priority.HIGHEST); + } + + // note: must hold scheduling lock + private void onChunkGenComplete(final ChunkAccess newChunk, final ChunkStatus newStatus, + final List scheduleList, final List changedLoadStatus) { + if (!this.neighboursBlockingGenTask.isEmpty()) { + throw new IllegalStateException("Cannot have neighbours blocking this gen task"); + } + if (newChunk != null || (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(newStatus))) { + this.completeStatusConsumers(newStatus, newChunk); + } + // done now, clear state (must be done before scheduling new tasks) + this.generationTask = null; + this.generationTaskStatus = null; + if (newChunk == null) { + // task was cancelled + // should be careful as this could be called while holding the schedule lock and/or inside the + // ticket level update + // while a task may be cancelled, it is possible for it to be later re-scheduled + // however, because generationTask is only set to null on _completion_, the scheduler leaves + // the rescheduling logic to us here + final ChunkStatus requestedGenStatus = this.requestedGenStatus; + this.requestedGenStatus = null; + if (requestedGenStatus != null) { + // it looks like it has been requested, so we must reschedule + if (!this.neighboursWaitingForUs.isEmpty()) { + for (final Iterator> iterator = this.neighboursWaitingForUs.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { + final Reference2ObjectMap.Entry entry = iterator.next(); + + final NewChunkHolder chunkHolder = entry.getKey(); + final ChunkStatus toStatus = entry.getValue(); + + if (!requestedGenStatus.isOrAfter(toStatus)) { + // if we were cancelled, we are responsible for removing the waiter + if (!chunkHolder.neighboursBlockingGenTask.remove(this)) { + throw new IllegalStateException("Corrupt state"); + } + if (chunkHolder.neighboursBlockingGenTask.isEmpty()) { + chunkHolder.checkUnload(); + } + iterator.remove(); + continue; + } + } + } + + // note: only after generationTask -> null, generationTaskStatus -> null, and requestedGenStatus -> null + this.scheduler.schedule( + this.chunkX, this.chunkZ, requestedGenStatus, this, scheduleList + ); + + // return, can't do anything further + return; + } + + if (!this.neighboursWaitingForUs.isEmpty()) { + for (final NewChunkHolder chunkHolder : this.neighboursWaitingForUs.keySet()) { + if (!chunkHolder.neighboursBlockingGenTask.remove(this)) { + throw new IllegalStateException("Corrupt state"); + } + if (chunkHolder.neighboursBlockingGenTask.isEmpty()) { + chunkHolder.checkUnload(); + } + } + this.neighboursWaitingForUs.clear(); + } + // reset priority, we have nothing left to generate to + this.setPriority(PrioritisedExecutor.Priority.NORMAL); + this.checkUnload(); + return; + } + + this.currentChunk = newChunk; + this.currentGenStatus = newStatus; + this.lastChunkCompletion = new ChunkCompletion(newChunk, newStatus); + + final ChunkStatus requestedGenStatus = this.requestedGenStatus; + + List needsScheduling = null; + boolean recalculatePriority = false; + for (final Iterator> iterator + = this.neighboursWaitingForUs.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { + final Reference2ObjectMap.Entry entry = iterator.next(); + final NewChunkHolder neighbour = entry.getKey(); + final ChunkStatus requiredStatus = entry.getValue(); + + if (!newStatus.isOrAfter(requiredStatus)) { + if (requestedGenStatus == null || !requestedGenStatus.isOrAfter(requiredStatus)) { + // if we're cancelled, still need to clear this map + if (!neighbour.neighboursBlockingGenTask.remove(this)) { + throw new IllegalStateException("Neighbour is not waiting for us?"); + } + if (neighbour.neighboursBlockingGenTask.isEmpty()) { + neighbour.checkUnload(); + } + + iterator.remove(); + } + continue; + } + + // doesn't matter what isCancelled is here, we need to schedule if we can + + recalculatePriority = true; + if (!neighbour.neighboursBlockingGenTask.remove(this)) { + throw new IllegalStateException("Neighbour is not waiting for us?"); + } + + if (neighbour.neighboursBlockingGenTask.isEmpty()) { + if (neighbour.requestedGenStatus != null) { + if (needsScheduling == null) { + needsScheduling = new ArrayList<>(); + } + needsScheduling.add(neighbour); + } else { + neighbour.checkUnload(); + } + } + + // remove last; access to entry will throw if removed + iterator.remove(); + } + + if (newStatus == ChunkStatus.FULL) { + this.lockPriority(); + // must use oldTicketLevel, we hold the schedule lock but not the ticket level lock + // however, schedule lock needs to be held for ticket level callback, so we're fine here + if (ChunkLevel.fullStatus(this.oldTicketLevel).isOrAfter(FullChunkStatus.FULL)) { + this.queueBorderFullStatus(true, changedLoadStatus); + } + } + + if (recalculatePriority) { + this.recalculateNeighbourRequestedPriority(); + } + + if (requestedGenStatus != null && !newStatus.isOrAfter(requestedGenStatus)) { + this.scheduleNeighbours(needsScheduling, scheduleList); + + // we need to schedule more tasks now + this.scheduler.schedule( + this.chunkX, this.chunkZ, requestedGenStatus, this, scheduleList + ); + } else { + // we're done now + if (requestedGenStatus != null) { + this.requestedGenStatus = null; + } + // reached final stage, so stop scheduling now + this.setPriority(PrioritisedExecutor.Priority.NORMAL); + this.checkUnload(); + + this.scheduleNeighbours(needsScheduling, scheduleList); + } + } + + private void scheduleNeighbours(final List needsScheduling, final List scheduleList) { + if (needsScheduling != null) { + for (int i = 0, len = needsScheduling.size(); i < len; ++i) { + final NewChunkHolder neighbour = needsScheduling.get(i); + + this.scheduler.schedule( + neighbour.chunkX, neighbour.chunkZ, neighbour.requestedGenStatus, neighbour, scheduleList + ); + } + } + } + + public void setGenerationTask(final ChunkProgressionTask generationTask, final ChunkStatus taskStatus, + final List neighbours) { + if (this.generationTask != null || (this.currentGenStatus != null && this.currentGenStatus.isOrAfter(taskStatus))) { + throw new IllegalStateException("Currently generating or provided task is trying to generate to a level we are already at!"); + } + if (this.requestedGenStatus == null || !this.requestedGenStatus.isOrAfter(taskStatus)) { + throw new IllegalStateException("Cannot schedule generation task when not requested"); + } + this.generationTask = generationTask; + this.generationTaskStatus = taskStatus; + + for (int i = 0, len = neighbours.size(); i < len; ++i) { + neighbours.get(i).addNeighbourUsingChunk(); + } + + this.checkUnload(); + + generationTask.onComplete((final ChunkAccess access, final Throwable thr) -> { + if (generationTask != this.generationTask) { + throw new IllegalStateException( + "Cannot complete generation task '" + generationTask + "' because we are waiting on '" + this.generationTask + "' instead!" + ); + } + if (thr != null) { + if (this.genTaskException != null) { + // first one is probably the TRUE problem + return; + } + // don't set generation task to null, so that scheduling will not attempt to create another task and it + // will automatically block any further scheduling usage of this chunk as it will wait forever for a failed + // task to complete + this.genTaskException = thr; + this.failedGenStatus = taskStatus; + this.genTaskFailedThread = Thread.currentThread(); + + this.scheduler.unrecoverableChunkSystemFailure(this.chunkX, this.chunkZ, Map.of( + "Generation task", ChunkTaskScheduler.stringIfNull(generationTask), + "Task to status", ChunkTaskScheduler.stringIfNull(taskStatus) + ), thr); + return; + } + + final boolean scheduleTasks; + List tasks = ChunkHolderManager.getCurrentTicketUpdateScheduling(); + if (tasks == null) { + scheduleTasks = true; + tasks = new ArrayList<>(); + } else { + scheduleTasks = false; + // we are currently updating ticket levels, so we already hold the schedule lock + // this means we have to leave the ticket level update to handle the scheduling + } + final List changedLoadStatus = new ArrayList<>(); + // theoretically, we could schedule a chunk at the max radius which performs another max radius access. So we need to double the radius. + final ReentrantAreaLock.Node schedulingLock = this.scheduler.schedulingLockArea.lock(this.chunkX, this.chunkZ, 2 * ChunkTaskScheduler.getMaxAccessRadius()); + try { + for (int i = 0, len = neighbours.size(); i < len; ++i) { + neighbours.get(i).removeNeighbourUsingChunk(); + } + this.onChunkGenComplete(access, taskStatus, tasks, changedLoadStatus); + } finally { + this.scheduler.schedulingLockArea.unlock(schedulingLock); + } + this.scheduler.chunkHolderManager.addChangedStatuses(changedLoadStatus); + + if (scheduleTasks) { + // can't hold the lock while scheduling, so we have to build the tasks and then schedule after + for (int i = 0, len = tasks.size(); i < len; ++i) { + tasks.get(i).schedule(); + } + } + }); + } + + public PoiChunk getPoiChunk() { + return this.poiChunk; + } + + public ChunkEntitySlices getEntityChunk() { + return this.entityChunk; + } + + public long lastAutoSave; + + public static final record SaveStat(boolean savedChunk, boolean savedEntityChunk, boolean savedPoiChunk) {} + + public SaveStat save(final boolean shutdown, final boolean unloading) { + TickThread.ensureTickThread(this.world, this.chunkX, this.chunkZ, "Cannot save data off-main"); + + ChunkAccess chunk = this.getCurrentChunk(); + PoiChunk poi = this.getPoiChunk(); + ChunkEntitySlices entities = this.getEntityChunk(); + boolean executedUnloadTask = false; + + if (shutdown) { + // make sure that the async unloads complete + if (this.unloadState != null) { + // must have errored during unload + chunk = this.unloadState.chunk(); + poi = this.unloadState.poiChunk(); + entities = this.unloadState.entityChunk(); + } + final UnloadTask chunkUnloadTask = this.chunkDataUnload; + final DelayedPrioritisedTask chunkDataUnloadTask = chunkUnloadTask == null ? null : chunkUnloadTask.task(); + if (chunkDataUnloadTask != null) { + final PrioritisedExecutor.PrioritisedTask unloadTask = chunkDataUnloadTask.getTask(); + if (unloadTask != null) { + executedUnloadTask = unloadTask.execute(); + } + } + } + + boolean canSaveChunk = !(chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave) && + (chunk != null && ((shutdown || chunk instanceof LevelChunk) && chunk.isUnsaved())); + boolean canSavePOI = !(chunk instanceof LevelChunk levelChunk && levelChunk.mustNotSave) && (poi != null && poi.isDirty()); + boolean canSaveEntities = entities != null; + + try (co.aikar.timings.Timing ignored = this.world.timings.chunkSave.startTiming()) { // Paper + if (canSaveChunk) { + canSaveChunk = this.saveChunk(chunk, unloading); + } + if (canSavePOI) { + canSavePOI = this.savePOI(poi, unloading); + } + if (canSaveEntities) { + // on shutdown, we need to force transient entity chunks to save + canSaveEntities = this.saveEntities(entities, unloading || shutdown); + if (unloading || shutdown) { + this.lastEntityUnload = null; + } + } + } + + return executedUnloadTask | canSaveChunk | canSaveEntities | canSavePOI ? new SaveStat(executedUnloadTask || canSaveChunk, canSaveEntities, canSavePOI): null; + } + + static final class AsyncChunkSerializeTask implements Runnable { + + private final ServerLevel world; + private final ChunkAccess chunk; + private final ChunkSerializer.AsyncSaveData asyncSaveData; + private final NewChunkHolder toComplete; + + public AsyncChunkSerializeTask(final ServerLevel world, final ChunkAccess chunk, final ChunkSerializer.AsyncSaveData asyncSaveData, + final NewChunkHolder toComplete) { + this.world = world; + this.chunk = chunk; + this.asyncSaveData = asyncSaveData; + this.toComplete = toComplete; + } + + @Override + public void run() { + final CompoundTag toSerialize; + try { + toSerialize = ChunkSerializer.saveChunk(this.world, this.chunk, this.asyncSaveData); + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable throwable) { + LOGGER.error("Failed to asynchronously save chunk " + this.chunk.getPos() + " for world '" + this.world.getWorld().getName() + "', falling back to synchronous save", throwable); + this.world.chunkTaskScheduler.scheduleChunkTask(this.chunk.locX, this.chunk.locZ, () -> { + final CompoundTag synchronousSave; + try { + synchronousSave = ChunkSerializer.saveChunk(AsyncChunkSerializeTask.this.world, AsyncChunkSerializeTask.this.chunk, AsyncChunkSerializeTask.this.asyncSaveData); + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable throwable2) { + LOGGER.error("Failed to synchronously save chunk " + AsyncChunkSerializeTask.this.chunk.getPos() + " for world '" + AsyncChunkSerializeTask.this.world.getWorld().getName() + "', chunk data will be lost", throwable2); + AsyncChunkSerializeTask.this.toComplete.completeAsyncChunkDataSave(null); + return; + } + + AsyncChunkSerializeTask.this.toComplete.completeAsyncChunkDataSave(synchronousSave); + LOGGER.info("Successfully serialized chunk " + AsyncChunkSerializeTask.this.chunk.getPos() + " for world '" + AsyncChunkSerializeTask.this.world.getWorld().getName() + "' synchronously"); + + }, PrioritisedExecutor.Priority.HIGHEST); + return; + } + this.toComplete.completeAsyncChunkDataSave(toSerialize); + } + + @Override + public String toString() { + return "AsyncChunkSerializeTask{" + + "chunk={pos=" + this.chunk.getPos() + ",world=\"" + this.world.getWorld().getName() + "\"}" + + "}"; + } + } + + private boolean saveChunk(final ChunkAccess chunk, final boolean unloading) { + if (!chunk.isUnsaved()) { + if (unloading) { + this.completeAsyncChunkDataSave(null); + } + return false; + } + boolean completing = false; + try { + if (unloading) { + try { + final ChunkSerializer.AsyncSaveData asyncSaveData = ChunkSerializer.getAsyncSaveData(this.world, chunk); + + final PrioritisedExecutor.PrioritisedTask task = this.scheduler.loadExecutor.createTask(new AsyncChunkSerializeTask(this.world, chunk, asyncSaveData, this)); + + this.chunkDataUnload.task().setTask(task); + + task.queue(); + + chunk.setUnsaved(false); + + return true; + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr) { + LOGGER.error("Failed to prepare async chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "', falling back to synchronous save", thr); + // fall through to synchronous save + } + } + + final CompoundTag save = ChunkSerializer.saveChunk(this.world, chunk, null); + + if (unloading) { + completing = true; + this.completeAsyncChunkDataSave(save); + LOGGER.info("Successfully serialized chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "' synchronously"); + } else { + RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.CHUNK_DATA); + } + chunk.setUnsaved(false); + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr) { + LOGGER.error("Failed to save chunk data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'"); + if (unloading && !completing) { + this.completeAsyncChunkDataSave(null); + } + } + + return true; + } + + private boolean lastEntitySaveNull; + private CompoundTag lastEntityUnload; + private boolean saveEntities(final ChunkEntitySlices entities, final boolean unloading) { + try { + CompoundTag mergeFrom = null; + if (entities.isTransient()) { + if (!unloading) { + // if we're a transient chunk, we cannot save until unloading because otherwise a double save will + // result in double adding the entities + return false; + } + try { + mergeFrom = RegionFileIOThread.loadData(this.world, this.chunkX, this.chunkZ, RegionFileIOThread.RegionFileType.ENTITY_DATA, PrioritisedExecutor.Priority.BLOCKING); + } catch (final Exception ex) { + LOGGER.error("Cannot merge transient entities for chunk (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "', data on disk will be replaced", ex); + } + } + + final CompoundTag save = entities.save(); + if (mergeFrom != null) { + if (save == null) { + // don't override the data on disk with nothing + return false; + } else { + EntityStorage.copyEntities(mergeFrom, save); + } + } + if (save == null && this.lastEntitySaveNull) { + return false; + } + + RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.ENTITY_DATA); + this.lastEntitySaveNull = save == null; + if (unloading) { + this.lastEntityUnload = save; + } + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr) { + LOGGER.error("Failed to save entity data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'"); + } + + return true; + } + + private boolean lastPoiSaveNull; + private boolean savePOI(final PoiChunk poi, final boolean unloading) { + try { + final CompoundTag save = poi.save(); + poi.setDirty(false); + if (save == null && this.lastPoiSaveNull) { + if (unloading) { + this.poiDataUnload.completable().complete(null); + } + return false; + } + + RegionFileIOThread.scheduleSave(this.world, this.chunkX, this.chunkZ, save, RegionFileIOThread.RegionFileType.POI_DATA); + this.lastPoiSaveNull = save == null; + if (unloading) { + this.poiDataUnload.completable().complete(save); + } + } catch (final ThreadDeath death) { + throw death; + } catch (final Throwable thr) { + LOGGER.error("Failed to save poi data (" + this.chunkX + "," + this.chunkZ + ") in world '" + this.world.getWorld().getName() + "'"); + } + + return true; + } + + @Override + public String toString() { + final ChunkCompletion lastCompletion = this.lastChunkCompletion; + final ChunkEntitySlices entityChunk = this.entityChunk; + final long chunkStatus = this.chunkStatus; + final int fullChunkStatus = (int)chunkStatus; + final int pendingChunkStatus = (int)(chunkStatus >>> 32); + final FullChunkStatus currentFullStatus = fullChunkStatus < 0 || fullChunkStatus >= CHUNK_STATUS_BY_ID.length ? null : CHUNK_STATUS_BY_ID[fullChunkStatus]; + final FullChunkStatus pendingFullStatus = pendingChunkStatus < 0 || pendingChunkStatus >= CHUNK_STATUS_BY_ID.length ? null : CHUNK_STATUS_BY_ID[pendingChunkStatus]; + return "NewChunkHolder{" + + "world=" + this.world.getWorld().getName() + + ", chunkX=" + this.chunkX + + ", chunkZ=" + this.chunkZ + + ", entityChunkFromDisk=" + (entityChunk != null && !entityChunk.isTransient()) + + ", lastChunkCompletion={chunk_class=" + (lastCompletion == null || lastCompletion.chunk() == null ? "null" : lastCompletion.chunk().getClass().getName()) + ",status=" + (lastCompletion == null ? "null" : lastCompletion.genStatus()) + "}" + + ", currentGenStatus=" + this.currentGenStatus + + ", requestedGenStatus=" + this.requestedGenStatus + + ", generationTask=" + this.generationTask + + ", generationTaskStatus=" + this.generationTaskStatus + + ", priority=" + this.priority + + ", priorityLocked=" + this.priorityLocked + + ", neighbourRequestedPriority=" + this.neighbourRequestedPriority + + ", effective_priority=" + this.getEffectivePriority() + + ", oldTicketLevel=" + this.oldTicketLevel + + ", currentTicketLevel=" + this.currentTicketLevel + + ", totalNeighboursUsingThisChunk=" + this.totalNeighboursUsingThisChunk + + ", fullNeighbourChunksLoadedBitset=" + this.fullNeighbourChunksLoadedBitset + + ", chunkStatusRaw=" + chunkStatus + + ", currentChunkStatus=" + currentFullStatus + + ", pendingChunkStatus=" + pendingFullStatus + + ", is_unload_safe=" + this.isSafeToUnload() + + ", killed=" + this.killed + + '}'; + } + + private static JsonElement serializeCompletable(final Completable completable) { + if (completable == null) { + return new JsonPrimitive("null"); + } + + final JsonObject ret = new JsonObject(); + final boolean isCompleted = completable.isCompleted(); + ret.addProperty("completed", Boolean.valueOf(isCompleted)); + + if (isCompleted) { + ret.addProperty("completed_exceptionally", Boolean.valueOf(completable.getThrowable() != null)); + } + + return ret; + } + + // holds ticket and scheduling lock + public JsonObject getDebugJson() { + final JsonObject ret = new JsonObject(); + + final ChunkCompletion lastCompletion = this.lastChunkCompletion; + final ChunkEntitySlices slices = this.entityChunk; + final PoiChunk poiChunk = this.poiChunk; + + ret.addProperty("chunkX", Integer.valueOf(this.chunkX)); + ret.addProperty("chunkZ", Integer.valueOf(this.chunkZ)); + ret.addProperty("entity_chunk", slices == null ? "null" : "transient=" + slices.isTransient()); + ret.addProperty("poi_chunk", "null=" + (poiChunk == null)); + ret.addProperty("completed_chunk_class", lastCompletion == null ? "null" : lastCompletion.chunk().getClass().getName()); + ret.addProperty("completed_gen_status", lastCompletion == null ? "null" : lastCompletion.genStatus().toString()); + ret.addProperty("priority", Objects.toString(this.priority)); + ret.addProperty("neighbour_requested_priority", Objects.toString(this.neighbourRequestedPriority)); + ret.addProperty("generation_task", Objects.toString(this.generationTask)); + ret.addProperty("is_safe_unload", Objects.toString(this.isSafeToUnload())); + ret.addProperty("old_ticket_level", Integer.valueOf(this.oldTicketLevel)); + ret.addProperty("current_ticket_level", Integer.valueOf(this.currentTicketLevel)); + ret.addProperty("neighbours_using_chunk", Integer.valueOf(this.totalNeighboursUsingThisChunk)); + + final JsonObject neighbourWaitState = new JsonObject(); + ret.add("neighbour_state", neighbourWaitState); + + final JsonArray blockingGenNeighbours = new JsonArray(); + neighbourWaitState.add("blocking_gen_task", blockingGenNeighbours); + for (final NewChunkHolder blockingGenNeighbour : this.neighboursBlockingGenTask) { + final JsonObject neighbour = new JsonObject(); + blockingGenNeighbours.add(neighbour); + + neighbour.addProperty("chunkX", Integer.valueOf(blockingGenNeighbour.chunkX)); + neighbour.addProperty("chunkZ", Integer.valueOf(blockingGenNeighbour.chunkZ)); + } + + final JsonArray neighboursWaitingForUs = new JsonArray(); + neighbourWaitState.add("neighbours_waiting_on_us", neighboursWaitingForUs); + for (final Reference2ObjectMap.Entry entry : this.neighboursWaitingForUs.reference2ObjectEntrySet()) { + final NewChunkHolder holder = entry.getKey(); + final ChunkStatus status = entry.getValue(); + + final JsonObject neighbour = new JsonObject(); + neighboursWaitingForUs.add(neighbour); + + + neighbour.addProperty("chunkX", Integer.valueOf(holder.chunkX)); + neighbour.addProperty("chunkZ", Integer.valueOf(holder.chunkZ)); + neighbour.addProperty("waiting_for", Objects.toString(status)); + } + + ret.addProperty("fullchunkstatus", Objects.toString(this.getChunkStatus())); + ret.addProperty("fullchunkstatus_raw", Long.valueOf(this.chunkStatus)); + ret.addProperty("generation_task", Objects.toString(this.generationTask)); + ret.addProperty("requested_generation", Objects.toString(this.requestedGenStatus)); + ret.addProperty("has_entity_load_task", Boolean.valueOf(this.entityDataLoadTask != null)); + ret.addProperty("has_poi_load_task", Boolean.valueOf(this.poiDataLoadTask != null)); + + final UnloadTask entityDataUnload = this.entityDataUnload; + final UnloadTask poiDataUnload = this.poiDataUnload; + final UnloadTask chunkDataUnload = this.chunkDataUnload; + + ret.add("entity_unload_completable", serializeCompletable(entityDataUnload == null ? null : entityDataUnload.completable())); + ret.add("poi_unload_completable", serializeCompletable(poiDataUnload == null ? null : poiDataUnload.completable())); + ret.add("chunk_unload_completable", serializeCompletable(chunkDataUnload == null ? null : chunkDataUnload.completable())); + + final DelayedPrioritisedTask unloadTask = chunkDataUnload == null ? null : chunkDataUnload.task(); + if (unloadTask == null) { + ret.addProperty("unload_task_priority", "null"); + ret.addProperty("unload_task_priority_raw", "null"); + } else { + ret.addProperty("unload_task_priority", Objects.toString(unloadTask.getPriority())); + ret.addProperty("unload_task_priority_raw", Integer.valueOf(unloadTask.getPriorityInternal())); + } + + ret.addProperty("killed", Boolean.valueOf(this.killed)); + + return ret; + } +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java new file mode 100644 index 0000000000000000000000000000000000000000..b4c56bf12dc8dd17452210ece4fd67411cc6b2fd --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/PriorityHolder.java @@ -0,0 +1,215 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import java.lang.invoke.VarHandle; + +public abstract class PriorityHolder { + + protected volatile int priority; + protected static final VarHandle PRIORITY_HANDLE = ConcurrentUtil.getVarHandle(PriorityHolder.class, "priority", int.class); + + protected static final int PRIORITY_SCHEDULED = Integer.MIN_VALUE >>> 0; + protected static final int PRIORITY_EXECUTED = Integer.MIN_VALUE >>> 1; + + protected final int getPriorityVolatile() { + return (int)PRIORITY_HANDLE.getVolatile((PriorityHolder)this); + } + + protected final int compareAndExchangePriorityVolatile(final int expect, final int update) { + return (int)PRIORITY_HANDLE.compareAndExchange((PriorityHolder)this, (int)expect, (int)update); + } + + protected final int getAndOrPriorityVolatile(final int val) { + return (int)PRIORITY_HANDLE.getAndBitwiseOr((PriorityHolder)this, (int)val); + } + + protected final void setPriorityPlain(final int val) { + PRIORITY_HANDLE.set((PriorityHolder)this, (int)val); + } + + protected PriorityHolder(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + this.setPriorityPlain(priority.priority); + } + + // used only for debug json + public boolean isScheduled() { + return (this.getPriorityVolatile() & PRIORITY_SCHEDULED) != 0; + } + + // returns false if cancelled + protected boolean markExecuting() { + return (this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) == 0; + } + + protected boolean isMarkedExecuted() { + return (this.getPriorityVolatile() & PRIORITY_EXECUTED) != 0; + } + + public void cancel() { + if ((this.getAndOrPriorityVolatile(PRIORITY_EXECUTED) & PRIORITY_EXECUTED) != 0) { + // cancelled already + return; + } + this.cancelScheduled(); + } + + public void schedule() { + int priority = this.getPriorityVolatile(); + + if ((priority & PRIORITY_SCHEDULED) != 0) { + throw new IllegalStateException("schedule() called twice"); + } + + if ((priority & PRIORITY_EXECUTED) != 0) { + // cancelled + return; + } + + this.scheduleTask(PrioritisedExecutor.Priority.getPriority(priority)); + + int failures = 0; + for (;;) { + if (priority == (priority = this.compareAndExchangePriorityVolatile(priority, priority | PRIORITY_SCHEDULED))) { + return; + } + + if ((priority & PRIORITY_SCHEDULED) != 0) { + throw new IllegalStateException("schedule() called twice"); + } + + if ((priority & PRIORITY_EXECUTED) != 0) { + // cancelled or executed + return; + } + + this.setPriorityScheduled(PrioritisedExecutor.Priority.getPriority(priority)); + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public final PrioritisedExecutor.Priority getPriority() { + final int ret = this.getPriorityVolatile(); + if ((ret & PRIORITY_EXECUTED) != 0) { + return PrioritisedExecutor.Priority.COMPLETING; + } + if ((ret & PRIORITY_SCHEDULED) != 0) { + return this.getScheduledPriority(); + } + return PrioritisedExecutor.Priority.getPriority(ret); + } + + public final void lowerPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + int failures = 0; + for (int curr = this.getPriorityVolatile();;) { + if ((curr & PRIORITY_EXECUTED) != 0) { + return; + } + + if ((curr & PRIORITY_SCHEDULED) != 0) { + this.lowerPriorityScheduled(priority); + return; + } + + if (!priority.isLowerPriority(curr)) { + return; + } + + if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) { + return; + } + + // failed, retry + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public final void setPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + int failures = 0; + for (int curr = this.getPriorityVolatile();;) { + if ((curr & PRIORITY_EXECUTED) != 0) { + return; + } + + if ((curr & PRIORITY_SCHEDULED) != 0) { + this.setPriorityScheduled(priority); + return; + } + + if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) { + return; + } + + // failed, retry + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + public final void raisePriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + int failures = 0; + for (int curr = this.getPriorityVolatile();;) { + if ((curr & PRIORITY_EXECUTED) != 0) { + return; + } + + if ((curr & PRIORITY_SCHEDULED) != 0) { + this.raisePriorityScheduled(priority); + return; + } + + if (!priority.isHigherPriority(curr)) { + return; + } + + if (curr == (curr = this.compareAndExchangePriorityVolatile(curr, priority.priority))) { + return; + } + + // failed, retry + + ++failures; + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + } + } + + protected abstract void cancelScheduled(); + + protected abstract PrioritisedExecutor.Priority getScheduledPriority(); + + protected abstract void scheduleTask(final PrioritisedExecutor.Priority priority); + + protected abstract void lowerPriorityScheduled(final PrioritisedExecutor.Priority priority); + + protected abstract void setPriorityScheduled(final PrioritisedExecutor.Priority priority); + + protected abstract void raisePriorityScheduled(final PrioritisedExecutor.Priority priority); +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/ThreadedTicketLevelPropagator.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/ThreadedTicketLevelPropagator.java new file mode 100644 index 0000000000000000000000000000000000000000..287240ed3b440f2f5733c368416e4276f626405d --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/ThreadedTicketLevelPropagator.java @@ -0,0 +1,1477 @@ +package io.papermc.paper.chunk.system.scheduling; + +import ca.spottedleaf.concurrentutil.collection.MultiThreadedQueue; +import ca.spottedleaf.concurrentutil.lock.ReentrantAreaLock; +import ca.spottedleaf.concurrentutil.util.ConcurrentUtil; +import it.unimi.dsi.fastutil.HashCommon; +import it.unimi.dsi.fastutil.longs.Long2ByteLinkedOpenHashMap; +import it.unimi.dsi.fastutil.shorts.Short2ByteLinkedOpenHashMap; +import it.unimi.dsi.fastutil.shorts.Short2ByteMap; +import it.unimi.dsi.fastutil.shorts.ShortOpenHashSet; +import java.lang.invoke.VarHandle; +import java.util.ArrayDeque; +import java.util.Arrays; +import java.util.Iterator; +import java.util.List; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.locks.LockSupport; + +public abstract class ThreadedTicketLevelPropagator { + + // sections are 64 in length + public static final int SECTION_SHIFT = 6; + public static final int SECTION_SIZE = 1 << SECTION_SHIFT; + private static final int LEVEL_BITS = SECTION_SHIFT; + private static final int LEVEL_COUNT = 1 << LEVEL_BITS; + private static final int MIN_SOURCE_LEVEL = 1; + // we limit the max source to 62 because the depropagation code _must_ attempt to depropagate + // a 1 level to 0; and if a source was 63 then it may cross more than 2 sections in depropagation + private static final int MAX_SOURCE_LEVEL = 62; + + private final UpdateQueue updateQueue; + private final ConcurrentHashMap sections = new ConcurrentHashMap<>(); + + public ThreadedTicketLevelPropagator() { + this.updateQueue = new UpdateQueue(); + } + + // must hold ticket lock for: + // (posX & ~(SECTION_SIZE - 1), posZ & ~(SECTION_SIZE - 1)) to (posX | (SECTION_SIZE - 1), posZ | (SECTION_SIZE - 1)) + public void setSource(final int posX, final int posZ, final int to) { + if (to < 1 || to > MAX_SOURCE_LEVEL) { + throw new IllegalArgumentException("Source: " + to); + } + + final int sectionX = posX >> SECTION_SHIFT; + final int sectionZ = posZ >> SECTION_SHIFT; + + final Coordinate coordinate = new Coordinate(sectionX, sectionZ); + Section section = this.sections.get(coordinate); + if (section == null) { + if (null != this.sections.putIfAbsent(coordinate, section = new Section(sectionX, sectionZ))) { + throw new IllegalStateException("Race condition while creating new section"); + } + } + + final int localIdx = (posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); + final short sLocalIdx = (short)localIdx; + + final short sourceAndLevel = section.levels[localIdx]; + final int currentSource = (sourceAndLevel >>> 8) & 0xFF; + + if (currentSource == to) { + // nothing to do + // make sure to kill the current update, if any + section.queuedSources.replace(sLocalIdx, (byte)to); + return; + } + + if (section.queuedSources.put(sLocalIdx, (byte)to) == Section.NO_QUEUED_UPDATE && section.queuedSources.size() == 1) { + this.queueSectionUpdate(section); + } + } + + // must hold ticket lock for: + // (posX & ~(SECTION_SIZE - 1), posZ & ~(SECTION_SIZE - 1)) to (posX | (SECTION_SIZE - 1), posZ | (SECTION_SIZE - 1)) + public void removeSource(final int posX, final int posZ) { + final int sectionX = posX >> SECTION_SHIFT; + final int sectionZ = posZ >> SECTION_SHIFT; + + final Coordinate coordinate = new Coordinate(sectionX, sectionZ); + final Section section = this.sections.get(coordinate); + + if (section == null) { + return; + } + + final int localIdx = (posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); + final short sLocalIdx = (short)localIdx; + + final int currentSource = (section.levels[localIdx] >>> 8) & 0xFF; + + if (currentSource == 0) { + // we use replace here so that we do not possibly multi-queue a section for an update + section.queuedSources.replace(sLocalIdx, (byte)0); + return; + } + + if (section.queuedSources.put(sLocalIdx, (byte)0) == Section.NO_QUEUED_UPDATE && section.queuedSources.size() == 1) { + this.queueSectionUpdate(section); + } + } + + private void queueSectionUpdate(final Section section) { + this.updateQueue.append(new UpdateQueue.UpdateQueueNode(section, null)); + } + + public boolean hasPendingUpdates() { + return !this.updateQueue.isEmpty(); + } + + // holds ticket lock for every chunk section represented by any position in the key set + // updates is modifiable and passed to processSchedulingUpdates after this call + protected abstract void processLevelUpdates(final Long2ByteLinkedOpenHashMap updates); + + // holds ticket lock for every chunk section represented by any position in the key set + // holds scheduling lock in max access radius for every position held by the ticket lock + // updates is cleared after this call + protected abstract void processSchedulingUpdates(final Long2ByteLinkedOpenHashMap updates, final List scheduledTasks, + final List changedFullStatus); + + // must hold ticket lock for every position in the sections in one radius around sectionX,sectionZ + public boolean performUpdate(final int sectionX, final int sectionZ, final ReentrantAreaLock schedulingLock, + final List scheduledTasks, final List changedFullStatus) { + if (!this.hasPendingUpdates()) { + return false; + } + + final Coordinate coordinate = new Coordinate(Coordinate.key(sectionX, sectionZ)); + final Section section = this.sections.get(coordinate); + + if (section == null || section.queuedSources.isEmpty()) { + // no section or no updates + return false; + } + + final Propagator propagator = Propagator.acquirePropagator(); + final boolean ret = this.performUpdate(section, null, propagator, + null, schedulingLock, scheduledTasks, changedFullStatus + ); + Propagator.returnPropagator(propagator); + return ret; + } + + private boolean performUpdate(final Section section, final UpdateQueue.UpdateQueueNode node, final Propagator propagator, + final ReentrantAreaLock ticketLock, final ReentrantAreaLock schedulingLock, + final List scheduledTasks, final List changedFullStatus) { + final int sectionX = section.sectionX; + final int sectionZ = section.sectionZ; + + final int rad1MinX = (sectionX - 1) << SECTION_SHIFT; + final int rad1MinZ = (sectionZ - 1) << SECTION_SHIFT; + final int rad1MaxX = ((sectionX + 1) << SECTION_SHIFT) | (SECTION_SIZE - 1); + final int rad1MaxZ = ((sectionZ + 1) << SECTION_SHIFT) | (SECTION_SIZE - 1); + + // set up encode offset first as we need to queue level changes _before_ + propagator.setupEncodeOffset(sectionX, sectionZ); + + final int coordinateOffset = propagator.coordinateOffset; + + final ReentrantAreaLock.Node ticketNode = ticketLock == null ? null : ticketLock.lock(rad1MinX, rad1MinZ, rad1MaxX, rad1MaxZ); + final boolean ret; + try { + // first, check if this update was stolen + if (section != this.sections.get(new Coordinate(sectionX, sectionZ))) { + // occurs when a stolen update deletes this section + // it is possible that another update is scheduled, but that one will have the correct section + if (node != null) { + this.updateQueue.remove(node); + } + return false; + } + + final int oldSourceSize = section.sources.size(); + + // process pending sources + for (final Iterator iterator = section.queuedSources.short2ByteEntrySet().fastIterator(); iterator.hasNext();) { + final Short2ByteMap.Entry entry = iterator.next(); + final int pos = (int)entry.getShortKey(); + final int posX = (pos & (SECTION_SIZE - 1)) | (sectionX << SECTION_SHIFT); + final int posZ = ((pos >> SECTION_SHIFT) & (SECTION_SIZE - 1)) | (sectionZ << SECTION_SHIFT); + final int newSource = (int)entry.getByteValue(); + + final short currentEncoded = section.levels[pos]; + final int currLevel = currentEncoded & 0xFF; + final int prevSource = (currentEncoded >>> 8) & 0xFF; + + if (prevSource == newSource) { + // nothing changed + continue; + } + + if ((prevSource < currLevel && newSource <= currLevel) || newSource == currLevel) { + // just update the source, don't need to propagate change + section.levels[pos] = (short)(currLevel | (newSource << 8)); + // level is unchanged, don't add to changed positions + } else { + // set current level and current source to new source + section.levels[pos] = (short)(newSource | (newSource << 8)); + // must add to updated positions in case this is final + propagator.updatedPositions.put(Coordinate.key(posX, posZ), (byte)newSource); + if (newSource != 0) { + // queue increase with new source level + propagator.appendToIncreaseQueue( + ((long)(posX + (posZ << Propagator.COORDINATE_BITS) + coordinateOffset) & ((1L << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) - 1)) | + ((newSource & (LEVEL_COUNT - 1L)) << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) | + (Propagator.ALL_DIRECTIONS_BITSET << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS + LEVEL_BITS)) + ); + } + // queue decrease with previous level + if (newSource < currLevel) { + propagator.appendToDecreaseQueue( + ((long)(posX + (posZ << Propagator.COORDINATE_BITS) + coordinateOffset) & ((1L << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) - 1)) | + ((currLevel & (LEVEL_COUNT - 1L)) << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS)) | + (Propagator.ALL_DIRECTIONS_BITSET << (Propagator.COORDINATE_BITS + Propagator.COORDINATE_BITS + LEVEL_BITS)) + ); + } + } + + if (newSource == 0) { + // prevSource != newSource, so we are removing this source + section.sources.remove((short)pos); + } else if (prevSource == 0) { + // prevSource != newSource, so we are adding this source + section.sources.add((short)pos); + } + } + + section.queuedSources.clear(); + + final int newSourceSize = section.sources.size(); + + if (oldSourceSize == 0 && newSourceSize != 0) { + // need to make sure the sections in 1 radius are initialised + for (int dz = -1; dz <= 1; ++dz) { + for (int dx = -1; dx <= 1; ++dx) { + if ((dx | dz) == 0) { + continue; + } + final int offX = dx + sectionX; + final int offZ = dz + sectionZ; + final Coordinate coordinate = new Coordinate(offX, offZ); + final Section neighbour = this.sections.computeIfAbsent(coordinate, (final Coordinate keyInMap) -> { + return new Section(Coordinate.x(keyInMap.key), Coordinate.z(keyInMap.key)); + }); + + // increase ref count + ++neighbour.oneRadNeighboursWithSources; + if (neighbour.oneRadNeighboursWithSources <= 0 || neighbour.oneRadNeighboursWithSources > 8) { + throw new IllegalStateException(Integer.toString(neighbour.oneRadNeighboursWithSources)); + } + } + } + } + + if (propagator.hasUpdates()) { + propagator.setupCaches(this, sectionX, sectionZ, 1); + propagator.performDecrease(); + // don't need try-finally, as any exception will cause the propagator to not be returned + propagator.destroyCaches(); + } + + if (newSourceSize == 0) { + final boolean decrementRef = oldSourceSize != 0; + // check for section de-init + for (int dz = -1; dz <= 1; ++dz) { + for (int dx = -1; dx <= 1; ++dx) { + final int offX = dx + sectionX; + final int offZ = dz + sectionZ; + final Coordinate coordinate = new Coordinate(offX, offZ); + final Section neighbour = this.sections.get(coordinate); + + if (neighbour == null) { + if (oldSourceSize == 0 && (dx | dz) != 0) { + // since we don't have sources, this section is allowed to null + continue; + } + throw new IllegalStateException("??"); + } + + if (decrementRef && (dx | dz) != 0) { + // decrease ref count, but only for neighbours + --neighbour.oneRadNeighboursWithSources; + } + + // we need to check the current section for de-init as well + if (neighbour.oneRadNeighboursWithSources == 0) { + if (neighbour.queuedSources.isEmpty() && neighbour.sources.isEmpty()) { + // need to de-init + this.sections.remove(coordinate); + } // else: neighbour is queued for an update, and it will de-init itself + } else if (neighbour.oneRadNeighboursWithSources < 0 || neighbour.oneRadNeighboursWithSources > 8) { + throw new IllegalStateException(Integer.toString(neighbour.oneRadNeighboursWithSources)); + } + } + } + } + + + ret = !propagator.updatedPositions.isEmpty(); + + if (ret) { + this.processLevelUpdates(propagator.updatedPositions); + + if (!propagator.updatedPositions.isEmpty()) { + // now we can actually update the ticket levels in the chunk holders + final int maxScheduleRadius = 2 * ChunkTaskScheduler.getMaxAccessRadius(); + + // allow the chunkholders to process ticket level updates without needing to acquire the schedule lock every time + final ReentrantAreaLock.Node schedulingNode = schedulingLock.lock( + rad1MinX - maxScheduleRadius, rad1MinZ - maxScheduleRadius, + rad1MaxX + maxScheduleRadius, rad1MaxZ + maxScheduleRadius + ); + try { + this.processSchedulingUpdates(propagator.updatedPositions, scheduledTasks, changedFullStatus); + } finally { + schedulingLock.unlock(schedulingNode); + } + } + + propagator.updatedPositions.clear(); + } + } finally { + if (ticketLock != null) { + ticketLock.unlock(ticketNode); + } + } + + // finished + if (node != null) { + this.updateQueue.remove(node); + } + + return ret; + } + + public boolean performUpdates(final ReentrantAreaLock ticketLock, final ReentrantAreaLock schedulingLock, + final List scheduledTasks, final List changedFullStatus) { + if (this.updateQueue.isEmpty()) { + return false; + } + + final long maxOrder = this.updateQueue.getLastOrder(); + + boolean updated = false; + Propagator propagator = null; + + for (;;) { + final UpdateQueue.UpdateQueueNode toUpdate = this.updateQueue.acquireNextToUpdate(maxOrder); + if (toUpdate == null) { + this.updateQueue.awaitFirst(maxOrder); + + if (!this.updateQueue.hasRemainingUpdates(maxOrder)) { + if (propagator != null) { + Propagator.returnPropagator(propagator); + } + return updated; + } + + continue; + } + + if (propagator == null) { + propagator = Propagator.acquirePropagator(); + } + + updated |= this.performUpdate(toUpdate.section, toUpdate, propagator, ticketLock, schedulingLock, scheduledTasks, changedFullStatus); + } + } + + private static final class UpdateQueue { + + private volatile UpdateQueueNode head; + private volatile UpdateQueueNode tail; + private volatile UpdateQueueNode lastUpdating; + + protected static final VarHandle HEAD_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueue.class, "head", UpdateQueueNode.class); + protected static final VarHandle TAIL_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueue.class, "tail", UpdateQueueNode.class); + protected static final VarHandle LAST_UPDATING = ConcurrentUtil.getVarHandle(UpdateQueue.class, "lastUpdating", UpdateQueueNode.class); + + /* head */ + + protected final void setHeadPlain(final UpdateQueueNode newHead) { + HEAD_HANDLE.set(this, newHead); + } + + protected final void setHeadOpaque(final UpdateQueueNode newHead) { + HEAD_HANDLE.setOpaque(this, newHead); + } + + protected final UpdateQueueNode getHeadPlain() { + return (UpdateQueueNode)HEAD_HANDLE.get(this); + } + + protected final UpdateQueueNode getHeadOpaque() { + return (UpdateQueueNode)HEAD_HANDLE.getOpaque(this); + } + + protected final UpdateQueueNode getHeadAcquire() { + return (UpdateQueueNode)HEAD_HANDLE.getAcquire(this); + } + + /* tail */ + + protected final void setTailPlain(final UpdateQueueNode newTail) { + TAIL_HANDLE.set(this, newTail); + } + + protected final void setTailOpaque(final UpdateQueueNode newTail) { + TAIL_HANDLE.setOpaque(this, newTail); + } + + protected final UpdateQueueNode getTailPlain() { + return (UpdateQueueNode)TAIL_HANDLE.get(this); + } + + protected final UpdateQueueNode getTailOpaque() { + return (UpdateQueueNode)TAIL_HANDLE.getOpaque(this); + } + + /* lastUpdating */ + + protected final UpdateQueueNode getLastUpdatingVolatile() { + return (UpdateQueueNode)LAST_UPDATING.getVolatile(this); + } + + protected final UpdateQueueNode compareAndExchangeLastUpdatingVolatile(final UpdateQueueNode expect, final UpdateQueueNode update) { + return (UpdateQueueNode)LAST_UPDATING.compareAndExchange(this, expect, update); + } + + public UpdateQueue() { + final UpdateQueueNode dummy = new UpdateQueueNode(null, null); + dummy.order = -1L; + dummy.preventAdds(); + + this.setHeadPlain(dummy); + this.setTailPlain(dummy); + } + + public boolean isEmpty() { + return this.peek() == null; + } + + public boolean hasRemainingUpdates(final long maxUpdate) { + final UpdateQueueNode node = this.peek(); + return node != null && node.order <= maxUpdate; + } + + public long getLastOrder() { + for (UpdateQueueNode tail = this.getTailOpaque(), curr = tail;;) { + final UpdateQueueNode next = curr.getNextVolatile(); + if (next == null) { + // try to update stale tail + if (this.getTailOpaque() == tail && curr != tail) { + this.setTailOpaque(curr); + } + return curr.order; + } + curr = next; + } + } + + public UpdateQueueNode acquireNextToUpdate(final long maxOrder) { + int failures = 0; + for (UpdateQueueNode prev = this.getLastUpdatingVolatile();;) { + UpdateQueueNode next = prev == null ? this.peek() : prev.next; + + if (next == null || next.order > maxOrder) { + return null; + } + + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + + if (prev == (prev = this.compareAndExchangeLastUpdatingVolatile(prev, next))) { + return next; + } + + ++failures; + } + } + + public void awaitFirst(final long maxOrder) { + final UpdateQueueNode earliest = this.peek(); + if (earliest == null || earliest.order > maxOrder) { + return; + } + + final Thread currThread = Thread.currentThread(); + // we do not use add-blocking because we use the nullability of the section to block + // remove() does not begin to poll from the wait queue until the section is null'd, + // and so provided we check the nullability before parking there is no ordering of these operations + // such that remove() finishes polling from the wait queue while section is not null + earliest.add(currThread); + + // wait until completed + while (earliest.getSectionVolatile() != null) { + LockSupport.park(); + } + } + + public UpdateQueueNode peek() { + for (UpdateQueueNode head = this.getHeadOpaque(), curr = head;;) { + final UpdateQueueNode next = curr.getNextVolatile(); + final Section element = curr.getSectionVolatile(); /* Likely in sync */ + + if (element != null) { + if (this.getHeadOpaque() == head && curr != head) { + this.setHeadOpaque(curr); + } + return curr; + } + + if (next == null) { + if (this.getHeadOpaque() == head && curr != head) { + this.setHeadOpaque(curr); + } + return null; + } + curr = next; + } + } + + public void remove(final UpdateQueueNode node) { + // mark as removed + node.setSectionVolatile(null); + + // use peek to advance head + this.peek(); + + // unpark any waiters / block the wait queue + Thread unpark; + while ((unpark = node.poll()) != null) { + LockSupport.unpark(unpark); + } + } + + public void append(final UpdateQueueNode node) { + int failures = 0; + + for (UpdateQueueNode currTail = this.getTailOpaque(), curr = currTail;;) { + /* It has been experimentally shown that placing the read before the backoff results in significantly greater performance */ + /* It is likely due to a cache miss caused by another write to the next field */ + final UpdateQueueNode next = curr.getNextVolatile(); + + for (int i = 0; i < failures; ++i) { + ConcurrentUtil.backoff(); + } + + if (next == null) { + node.order = curr.order + 1L; + final UpdateQueueNode compared = curr.compareExchangeNextVolatile(null, node); + + if (compared == null) { + /* Added */ + /* Avoid CASing on tail more than we need to */ + /* CAS to avoid setting an out-of-date tail */ + if (this.getTailOpaque() == currTail) { + this.setTailOpaque(node); + } + return; + } + + ++failures; + curr = compared; + continue; + } + + if (curr == currTail) { + /* Tail is likely not up-to-date */ + curr = next; + } else { + /* Try to update to tail */ + if (currTail == (currTail = this.getTailOpaque())) { + curr = next; + } else { + curr = currTail; + } + } + } + } + + // each node also represents a set of waiters, represented by the MTQ + // if the queue is add-blocked, then the update is complete + private static final class UpdateQueueNode extends MultiThreadedQueue { + private long order; + private Section section; + private volatile UpdateQueueNode next; + + protected static final VarHandle SECTION_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueueNode.class, "section", Section.class); + protected static final VarHandle NEXT_HANDLE = ConcurrentUtil.getVarHandle(UpdateQueueNode.class, "next", UpdateQueueNode.class); + + public UpdateQueueNode(final Section section, final UpdateQueueNode next) { + SECTION_HANDLE.set(this, section); + NEXT_HANDLE.set(this, next); + } + + /* section */ + + protected final Section getSectionPlain() { + return (Section)SECTION_HANDLE.get(this); + } + + protected final Section getSectionVolatile() { + return (Section)SECTION_HANDLE.getVolatile(this); + } + + protected final void setSectionPlain(final Section update) { + SECTION_HANDLE.set(this, update); + } + + protected final void setSectionOpaque(final Section update) { + SECTION_HANDLE.setOpaque(this, update); + } + + protected final void setSectionVolatile(final Section update) { + SECTION_HANDLE.setVolatile(this, update); + } + + protected final Section getAndSetSectionVolatile(final Section update) { + return (Section)SECTION_HANDLE.getAndSet(this, update); + } + + protected final Section compareExchangeSectionVolatile(final Section expect, final Section update) { + return (Section)SECTION_HANDLE.compareAndExchange(this, expect, update); + } + + /* next */ + + protected final UpdateQueueNode getNextPlain() { + return (UpdateQueueNode)NEXT_HANDLE.get(this); + } + + protected final UpdateQueueNode getNextOpaque() { + return (UpdateQueueNode)NEXT_HANDLE.getOpaque(this); + } + + protected final UpdateQueueNode getNextAcquire() { + return (UpdateQueueNode)NEXT_HANDLE.getAcquire(this); + } + + protected final UpdateQueueNode getNextVolatile() { + return (UpdateQueueNode)NEXT_HANDLE.getVolatile(this); + } + + protected final void setNextPlain(final UpdateQueueNode next) { + NEXT_HANDLE.set(this, next); + } + + protected final void setNextVolatile(final UpdateQueueNode next) { + NEXT_HANDLE.setVolatile(this, next); + } + + protected final UpdateQueueNode compareExchangeNextVolatile(final UpdateQueueNode expect, final UpdateQueueNode set) { + return (UpdateQueueNode)NEXT_HANDLE.compareAndExchange(this, expect, set); + } + } + } + + private static final class Section { + + // upper 8 bits: sources, lower 8 bits: level + // if we REALLY wanted to get crazy, we could make the increase propagator use MethodHandles#byteArrayViewVarHandle + // to read and write the lower 8 bits of this array directly rather than reading, updating the bits, then writing back. + private final short[] levels = new short[SECTION_SIZE * SECTION_SIZE]; + // set of local positions that represent sources + private final ShortOpenHashSet sources = new ShortOpenHashSet(); + // map of local index to new source level + // the source level _cannot_ be updated in the backing storage immediately since the update + private static final byte NO_QUEUED_UPDATE = (byte)-1; + private final Short2ByteLinkedOpenHashMap queuedSources = new Short2ByteLinkedOpenHashMap(); + { + this.queuedSources.defaultReturnValue(NO_QUEUED_UPDATE); + } + private int oneRadNeighboursWithSources = 0; + + public final int sectionX; + public final int sectionZ; + + public Section(final int sectionX, final int sectionZ) { + this.sectionX = sectionX; + this.sectionZ = sectionZ; + } + + public boolean isZero() { + for (final short val : this.levels) { + if (val != 0) { + return false; + } + } + return true; + } + + @Override + public String toString() { + final StringBuilder ret = new StringBuilder(); + + for (int x = 0; x < SECTION_SIZE; ++x) { + ret.append("levels x=").append(x).append("\n"); + for (int z = 0; z < SECTION_SIZE; ++z) { + final short v = this.levels[x | (z << SECTION_SHIFT)]; + ret.append(v & 0xFF).append("."); + } + ret.append("\n"); + ret.append("sources x=").append(x).append("\n"); + for (int z = 0; z < SECTION_SIZE; ++z) { + final short v = this.levels[x | (z << SECTION_SHIFT)]; + ret.append((v >>> 8) & 0xFF).append("."); + } + ret.append("\n\n"); + } + + return ret.toString(); + } + } + + + private static final class Propagator { + + private static final ArrayDeque CACHED_PROPAGATORS = new ArrayDeque<>(); + private static final int MAX_PROPAGATORS = Runtime.getRuntime().availableProcessors() * 2; + + private static Propagator acquirePropagator() { + synchronized (CACHED_PROPAGATORS) { + final Propagator ret = CACHED_PROPAGATORS.pollFirst(); + if (ret != null) { + return ret; + } + } + return new Propagator(); + } + + private static void returnPropagator(final Propagator propagator) { + synchronized (CACHED_PROPAGATORS) { + if (CACHED_PROPAGATORS.size() < MAX_PROPAGATORS) { + CACHED_PROPAGATORS.add(propagator); + } + } + } + + private static final int SECTION_RADIUS = 2; + private static final int SECTION_CACHE_WIDTH = 2 * SECTION_RADIUS + 1; + // minimum number of bits to represent [0, SECTION_SIZE * SECTION_CACHE_WIDTH) + private static final int COORDINATE_BITS = 9; + private static final int COORDINATE_SIZE = 1 << COORDINATE_BITS; + static { + if ((SECTION_SIZE * SECTION_CACHE_WIDTH) > (1 << COORDINATE_BITS)) { + throw new IllegalStateException("Adjust COORDINATE_BITS"); + } + } + // index = x + (z * SECTION_CACHE_WIDTH) + // (this requires x >= 0 and z >= 0) + private final Section[] sections = new Section[SECTION_CACHE_WIDTH * SECTION_CACHE_WIDTH]; + + private int encodeOffsetX; + private int encodeOffsetZ; + + private int coordinateOffset; + + private int encodeSectionOffsetX; + private int encodeSectionOffsetZ; + + private int sectionIndexOffset; + + public final boolean hasUpdates() { + return this.decreaseQueueInitialLength != 0 || this.increaseQueueInitialLength != 0; + } + + protected final void setupEncodeOffset(final int centerSectionX, final int centerSectionZ) { + final int maxCoordinate = (SECTION_RADIUS * SECTION_SIZE - 1); + // must have that encoded >= 0 + // coordinates can range from [-maxCoordinate + centerSection*SECTION_SIZE, maxCoordinate + centerSection*SECTION_SIZE] + // we want a range of [0, maxCoordinate*2] + // so, 0 = -maxCoordinate + centerSection*SECTION_SIZE + offset + this.encodeOffsetX = maxCoordinate - (centerSectionX << SECTION_SHIFT); + this.encodeOffsetZ = maxCoordinate - (centerSectionZ << SECTION_SHIFT); + + // encoded coordinates range from [0, SECTION_SIZE * SECTION_CACHE_WIDTH) + // coordinate index = (x + encodeOffsetX) + ((z + encodeOffsetZ) << COORDINATE_BITS) + this.coordinateOffset = this.encodeOffsetX + (this.encodeOffsetZ << COORDINATE_BITS); + + // need encoded values to be >= 0 + // so, 0 = (-SECTION_RADIUS + centerSectionX) + encodeOffset + this.encodeSectionOffsetX = SECTION_RADIUS - centerSectionX; + this.encodeSectionOffsetZ = SECTION_RADIUS - centerSectionZ; + + // section index = (secX + encodeSectionOffsetX) + ((secZ + encodeSectionOffsetZ) * SECTION_CACHE_WIDTH) + this.sectionIndexOffset = this.encodeSectionOffsetX + (this.encodeSectionOffsetZ * SECTION_CACHE_WIDTH); + } + + // must hold ticket lock for (centerSectionX,centerSectionZ) in radius rad + // must call setupEncodeOffset + protected final void setupCaches(final ThreadedTicketLevelPropagator propagator, + final int centerSectionX, final int centerSectionZ, + final int rad) { + for (int dz = -rad; dz <= rad; ++dz) { + for (int dx = -rad; dx <= rad; ++dx) { + final int sectionX = centerSectionX + dx; + final int sectionZ = centerSectionZ + dz; + final Coordinate coordinate = new Coordinate(sectionX, sectionZ); + final Section section = propagator.sections.get(coordinate); + + if (section == null) { + throw new IllegalStateException("Section at " + coordinate + " should not be null"); + } + + this.setSectionInCache(sectionX, sectionZ, section); + } + } + } + + protected final void setSectionInCache(final int sectionX, final int sectionZ, final Section section) { + this.sections[sectionX + SECTION_CACHE_WIDTH*sectionZ + this.sectionIndexOffset] = section; + } + + protected final Section getSection(final int sectionX, final int sectionZ) { + return this.sections[sectionX + SECTION_CACHE_WIDTH*sectionZ + this.sectionIndexOffset]; + } + + protected final int getLevel(final int posX, final int posZ) { + final Section section = this.sections[(posX >> SECTION_SHIFT) + SECTION_CACHE_WIDTH*(posZ >> SECTION_SHIFT) + this.sectionIndexOffset]; + if (section != null) { + return (int)section.levels[(posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT)] & 0xFF; + } + + return 0; + } + + protected final void setLevel(final int posX, final int posZ, final int to) { + final Section section = this.sections[(posX >> SECTION_SHIFT) + SECTION_CACHE_WIDTH*(posZ >> SECTION_SHIFT) + this.sectionIndexOffset]; + if (section != null) { + final int index = (posX & (SECTION_SIZE - 1)) | ((posZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); + final short level = section.levels[index]; + section.levels[index] = (short)((level & ~0xFF) | (to & 0xFF)); + this.updatedPositions.put(Coordinate.key(posX, posZ), (byte)to); + } + } + + protected final void destroyCaches() { + Arrays.fill(this.sections, null); + } + + // contains: + // lower (COORDINATE_BITS(9) + COORDINATE_BITS(9) = 18) bits encoded position: (x | (z << COORDINATE_BITS)) + // next LEVEL_BITS (6) bits: propagated level [0, 63] + // propagation directions bitset (16 bits): + protected static final long ALL_DIRECTIONS_BITSET = ( + // z = -1 + (1L << ((1 - 1) | ((1 - 1) << 2))) | + (1L << ((1 + 0) | ((1 - 1) << 2))) | + (1L << ((1 + 1) | ((1 - 1) << 2))) | + + // z = 0 + (1L << ((1 - 1) | ((1 + 0) << 2))) | + //(1L << ((1 + 0) | ((1 + 0) << 2))) | // exclude (0,0) + (1L << ((1 + 1) | ((1 + 0) << 2))) | + + // z = 1 + (1L << ((1 - 1) | ((1 + 1) << 2))) | + (1L << ((1 + 0) | ((1 + 1) << 2))) | + (1L << ((1 + 1) | ((1 + 1) << 2))) + ); + + private void ex(int bitset) { + for (int i = 0, len = Integer.bitCount(bitset); i < len; ++i) { + final int set = Integer.numberOfTrailingZeros(bitset); + final int tailingBit = (-bitset) & bitset; + // XOR to remove the trailing bit + bitset ^= tailingBit; + + // the encoded value set is (x_val) | (z_val << 2), totaling 4 bits + // thus, the bitset is 16 bits wide where each one represents a direction to propagate and the + // index of the set bit is the encoded value + // the encoded coordinate has 3 valid states: + // 0b00 (0) -> -1 + // 0b01 (1) -> 0 + // 0b10 (2) -> 1 + // the decode operation then is val - 1, and the encode operation is val + 1 + final int xOff = (set & 3) - 1; + final int zOff = ((set >>> 2) & 3) - 1; + System.out.println("Encoded: (" + xOff + "," + zOff + ")"); + } + } + + private void ch(long bs, int shift) { + int bitset = (int)(bs >>> shift); + for (int i = 0, len = Integer.bitCount(bitset); i < len; ++i) { + final int set = Integer.numberOfTrailingZeros(bitset); + final int tailingBit = (-bitset) & bitset; + // XOR to remove the trailing bit + bitset ^= tailingBit; + + // the encoded value set is (x_val) | (z_val << 2), totaling 4 bits + // thus, the bitset is 16 bits wide where each one represents a direction to propagate and the + // index of the set bit is the encoded value + // the encoded coordinate has 3 valid states: + // 0b00 (0) -> -1 + // 0b01 (1) -> 0 + // 0b10 (2) -> 1 + // the decode operation then is val - 1, and the encode operation is val + 1 + final int xOff = (set & 3) - 1; + final int zOff = ((set >>> 2) & 3) - 1; + if (Math.abs(xOff) > 1 || Math.abs(zOff) > 1 || (xOff | zOff) == 0) { + throw new IllegalStateException(); + } + } + } + + // whether the increase propagator needs to write the propagated level to the position, used to avoid cascading + // updates for sources + protected static final long FLAG_WRITE_LEVEL = Long.MIN_VALUE >>> 1; + // whether the propagation needs to check if its current level is equal to the expected level + // used only in increase propagation + protected static final long FLAG_RECHECK_LEVEL = Long.MIN_VALUE >>> 0; + + protected long[] increaseQueue = new long[SECTION_SIZE * SECTION_SIZE * 2]; + protected int increaseQueueInitialLength; + protected long[] decreaseQueue = new long[SECTION_SIZE * SECTION_SIZE * 2]; + protected int decreaseQueueInitialLength; + + protected final Long2ByteLinkedOpenHashMap updatedPositions = new Long2ByteLinkedOpenHashMap(); + + protected final long[] resizeIncreaseQueue() { + return this.increaseQueue = Arrays.copyOf(this.increaseQueue, this.increaseQueue.length * 2); + } + + protected final long[] resizeDecreaseQueue() { + return this.decreaseQueue = Arrays.copyOf(this.decreaseQueue, this.decreaseQueue.length * 2); + } + + protected final void appendToIncreaseQueue(final long value) { + final int idx = this.increaseQueueInitialLength++; + long[] queue = this.increaseQueue; + if (idx >= queue.length) { + queue = this.resizeIncreaseQueue(); + queue[idx] = value; + return; + } else { + queue[idx] = value; + return; + } + } + + protected final void appendToDecreaseQueue(final long value) { + final int idx = this.decreaseQueueInitialLength++; + long[] queue = this.decreaseQueue; + if (idx >= queue.length) { + queue = this.resizeDecreaseQueue(); + queue[idx] = value; + return; + } else { + queue[idx] = value; + return; + } + } + + protected final void performIncrease() { + long[] queue = this.increaseQueue; + int queueReadIndex = 0; + int queueLength = this.increaseQueueInitialLength; + this.increaseQueueInitialLength = 0; + final int decodeOffsetX = -this.encodeOffsetX; + final int decodeOffsetZ = -this.encodeOffsetZ; + final int encodeOffset = this.coordinateOffset; + final int sectionOffset = this.sectionIndexOffset; + + final Long2ByteLinkedOpenHashMap updatedPositions = this.updatedPositions; + + while (queueReadIndex < queueLength) { + final long queueValue = queue[queueReadIndex++]; + + final int posX = ((int)queueValue & (COORDINATE_SIZE - 1)) + decodeOffsetX; + final int posZ = (((int)queueValue >>> COORDINATE_BITS) & (COORDINATE_SIZE - 1)) + decodeOffsetZ; + final int propagatedLevel = ((int)queueValue >>> (COORDINATE_BITS + COORDINATE_BITS)) & (LEVEL_COUNT - 1); + // note: the above code requires coordinate bits * 2 < 32 + // bitset is 16 bits + int propagateDirectionBitset = (int)(queueValue >>> (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) & ((1 << 16) - 1); + + if ((queueValue & FLAG_RECHECK_LEVEL) != 0L) { + if (this.getLevel(posX, posZ) != propagatedLevel) { + // not at the level we expect, so something changed. + continue; + } + } else if ((queueValue & FLAG_WRITE_LEVEL) != 0L) { + // these are used to restore sources after a propagation decrease + this.setLevel(posX, posZ, propagatedLevel); + } + + // this bitset represents the values that we have not propagated to + // this bitset lets us determine what directions the neighbours we set should propagate to, in most cases + // significantly reducing the total number of ops + // since we propagate in a 1 radius, we need a 2 radius bitset to hold all possible values we would possibly need + // but if we use only 5x5 bits, then we need to use div/mod to retrieve coordinates from the bitset, so instead + // we use an 8x8 bitset and luckily that can be fit into only one long value (64 bits) + // to make things easy, we use positions [0, 4] in the bitset, with current position being 2 + // index = x | (z << 3) + + // to start, we eliminate everything 1 radius from the current position as the previous propagator + // must guarantee that either we propagate everything in 1 radius or we partially propagate for 1 radius + // but the rest not propagated are already handled + long currentPropagation = ~( + // z = -1 + (1L << ((2 - 1) | ((2 - 1) << 3))) | + (1L << ((2 + 0) | ((2 - 1) << 3))) | + (1L << ((2 + 1) | ((2 - 1) << 3))) | + + // z = 0 + (1L << ((2 - 1) | ((2 + 0) << 3))) | + (1L << ((2 + 0) | ((2 + 0) << 3))) | + (1L << ((2 + 1) | ((2 + 0) << 3))) | + + // z = 1 + (1L << ((2 - 1) | ((2 + 1) << 3))) | + (1L << ((2 + 0) | ((2 + 1) << 3))) | + (1L << ((2 + 1) | ((2 + 1) << 3))) + ); + + final int toPropagate = propagatedLevel - 1; + + // we could use while (propagateDirectionBitset != 0), but it's not a predictable branch. By counting + // the bits, the cpu loop predictor should perfectly predict the loop. + for (int l = 0, len = Integer.bitCount(propagateDirectionBitset); l < len; ++l) { + final int set = Integer.numberOfTrailingZeros(propagateDirectionBitset); + final int tailingBit = (-propagateDirectionBitset) & propagateDirectionBitset; + propagateDirectionBitset ^= tailingBit; + + // pDecode is from [0, 2], and 1 must be subtracted to fully decode the offset + // it has been split to save some cycles via parallelism + final int pDecodeX = (set & 3); + final int pDecodeZ = ((set >>> 2) & 3); + + // re-ordered -1 on the position decode into pos - 1 to occur in parallel with determining pDecodeX + final int offX = (posX - 1) + pDecodeX; + final int offZ = (posZ - 1) + pDecodeZ; + + final int sectionIndex = (offX >> SECTION_SHIFT) + ((offZ >> SECTION_SHIFT) * SECTION_CACHE_WIDTH) + sectionOffset; + final int localIndex = (offX & (SECTION_SIZE - 1)) | ((offZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); + + // to retrieve a set of bits from a long value: (n_bitmask << (nstartidx)) & bitset + // bitset idx = x | (z << 3) + + // read three bits, so we need 7L + // note that generally: off - pos = (pos - 1) + pDecode - pos = pDecode - 1 + // nstartidx1 = x rel -1 for z rel -1 + // = (offX - posX - 1 + 2) | ((offZ - posZ - 1 + 2) << 3) + // = (pDecodeX - 1 - 1 + 2) | ((pDecodeZ - 1 - 1 + 2) << 3) + // = pDecodeX | (pDecodeZ << 3) = start + final int start = pDecodeX | (pDecodeZ << 3); + final long bitsetLine1 = currentPropagation & (7L << (start)); + + // nstartidx2 = x rel -1 for z rel 0 = line after line1, so we can just add 8 (row length of bitset) + final long bitsetLine2 = currentPropagation & (7L << (start + 8)); + + // nstartidx2 = x rel -1 for z rel 0 = line after line2, so we can just add 8 (row length of bitset) + final long bitsetLine3 = currentPropagation & (7L << (start + (8 + 8))); + + // remove ("take") lines from bitset + currentPropagation ^= (bitsetLine1 | bitsetLine2 | bitsetLine3); + + // now try to propagate + final Section section = this.sections[sectionIndex]; + + // lower 8 bits are current level, next upper 7 bits are source level, next 1 bit is updated source flag + final short currentStoredLevel = section.levels[localIndex]; + final int currentLevel = currentStoredLevel & 0xFF; + + if (currentLevel >= toPropagate) { + continue; // already at the level we want + } + + // update level + section.levels[localIndex] = (short)((currentStoredLevel & ~0xFF) | (toPropagate & 0xFF)); + updatedPositions.putAndMoveToLast(Coordinate.key(offX, offZ), (byte)toPropagate); + + // queue next + if (toPropagate > 1) { + // now combine into one bitset to pass to child + // the child bitset is 4x4, so we just shift each line by 4 + // add the propagation bitset offset to each line to make it easy to OR it into the propagation queue value + final long childPropagation = + ((bitsetLine1 >>> (start)) << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = -1 + ((bitsetLine2 >>> (start + 8)) << (4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = 0 + ((bitsetLine3 >>> (start + (8 + 8))) << (4 + 4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); // z = 1 + + // don't queue update if toPropagate cannot propagate anything to neighbours + // (for increase, propagating 0 to neighbours is useless) + if (queueLength >= queue.length) { + queue = this.resizeIncreaseQueue(); + } + queue[queueLength++] = + ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | + ((toPropagate & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | + childPropagation; //(ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); + continue; + } + continue; + } + } + } + + protected final void performDecrease() { + long[] queue = this.decreaseQueue; + long[] increaseQueue = this.increaseQueue; + int queueReadIndex = 0; + int queueLength = this.decreaseQueueInitialLength; + this.decreaseQueueInitialLength = 0; + int increaseQueueLength = this.increaseQueueInitialLength; + final int decodeOffsetX = -this.encodeOffsetX; + final int decodeOffsetZ = -this.encodeOffsetZ; + final int encodeOffset = this.coordinateOffset; + final int sectionOffset = this.sectionIndexOffset; + + final Long2ByteLinkedOpenHashMap updatedPositions = this.updatedPositions; + + while (queueReadIndex < queueLength) { + final long queueValue = queue[queueReadIndex++]; + + final int posX = ((int)queueValue & (COORDINATE_SIZE - 1)) + decodeOffsetX; + final int posZ = (((int)queueValue >>> COORDINATE_BITS) & (COORDINATE_SIZE - 1)) + decodeOffsetZ; + final int propagatedLevel = ((int)queueValue >>> (COORDINATE_BITS + COORDINATE_BITS)) & (LEVEL_COUNT - 1); + // note: the above code requires coordinate bits * 2 < 32 + // bitset is 16 bits + int propagateDirectionBitset = (int)(queueValue >>> (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) & ((1 << 16) - 1); + + // this bitset represents the values that we have not propagated to + // this bitset lets us determine what directions the neighbours we set should propagate to, in most cases + // significantly reducing the total number of ops + // since we propagate in a 1 radius, we need a 2 radius bitset to hold all possible values we would possibly need + // but if we use only 5x5 bits, then we need to use div/mod to retrieve coordinates from the bitset, so instead + // we use an 8x8 bitset and luckily that can be fit into only one long value (64 bits) + // to make things easy, we use positions [0, 4] in the bitset, with current position being 2 + // index = x | (z << 3) + + // to start, we eliminate everything 1 radius from the current position as the previous propagator + // must guarantee that either we propagate everything in 1 radius or we partially propagate for 1 radius + // but the rest not propagated are already handled + long currentPropagation = ~( + // z = -1 + (1L << ((2 - 1) | ((2 - 1) << 3))) | + (1L << ((2 + 0) | ((2 - 1) << 3))) | + (1L << ((2 + 1) | ((2 - 1) << 3))) | + + // z = 0 + (1L << ((2 - 1) | ((2 + 0) << 3))) | + (1L << ((2 + 0) | ((2 + 0) << 3))) | + (1L << ((2 + 1) | ((2 + 0) << 3))) | + + // z = 1 + (1L << ((2 - 1) | ((2 + 1) << 3))) | + (1L << ((2 + 0) | ((2 + 1) << 3))) | + (1L << ((2 + 1) | ((2 + 1) << 3))) + ); + + final int toPropagate = propagatedLevel - 1; + + // we could use while (propagateDirectionBitset != 0), but it's not a predictable branch. By counting + // the bits, the cpu loop predictor should perfectly predict the loop. + for (int l = 0, len = Integer.bitCount(propagateDirectionBitset); l < len; ++l) { + final int set = Integer.numberOfTrailingZeros(propagateDirectionBitset); + final int tailingBit = (-propagateDirectionBitset) & propagateDirectionBitset; + propagateDirectionBitset ^= tailingBit; + + + // pDecode is from [0, 2], and 1 must be subtracted to fully decode the offset + // it has been split to save some cycles via parallelism + final int pDecodeX = (set & 3); + final int pDecodeZ = ((set >>> 2) & 3); + + // re-ordered -1 on the position decode into pos - 1 to occur in parallel with determining pDecodeX + final int offX = (posX - 1) + pDecodeX; + final int offZ = (posZ - 1) + pDecodeZ; + + final int sectionIndex = (offX >> SECTION_SHIFT) + ((offZ >> SECTION_SHIFT) * SECTION_CACHE_WIDTH) + sectionOffset; + final int localIndex = (offX & (SECTION_SIZE - 1)) | ((offZ & (SECTION_SIZE - 1)) << SECTION_SHIFT); + + // to retrieve a set of bits from a long value: (n_bitmask << (nstartidx)) & bitset + // bitset idx = x | (z << 3) + + // read three bits, so we need 7L + // note that generally: off - pos = (pos - 1) + pDecode - pos = pDecode - 1 + // nstartidx1 = x rel -1 for z rel -1 + // = (offX - posX - 1 + 2) | ((offZ - posZ - 1 + 2) << 3) + // = (pDecodeX - 1 - 1 + 2) | ((pDecodeZ - 1 - 1 + 2) << 3) + // = pDecodeX | (pDecodeZ << 3) = start + final int start = pDecodeX | (pDecodeZ << 3); + final long bitsetLine1 = currentPropagation & (7L << (start)); + + // nstartidx2 = x rel -1 for z rel 0 = line after line1, so we can just add 8 (row length of bitset) + final long bitsetLine2 = currentPropagation & (7L << (start + 8)); + + // nstartidx2 = x rel -1 for z rel 0 = line after line2, so we can just add 8 (row length of bitset) + final long bitsetLine3 = currentPropagation & (7L << (start + (8 + 8))); + + // now try to propagate + final Section section = this.sections[sectionIndex]; + + // lower 8 bits are current level, next upper 7 bits are source level, next 1 bit is updated source flag + final short currentStoredLevel = section.levels[localIndex]; + final int currentLevel = currentStoredLevel & 0xFF; + final int sourceLevel = (currentStoredLevel >>> 8) & 0xFF; + + if (currentLevel == 0) { + continue; // already at the level we want + } + + if (currentLevel > toPropagate) { + // it looks like another source propagated here, so re-propagate it + if (increaseQueueLength >= increaseQueue.length) { + increaseQueue = this.resizeIncreaseQueue(); + } + increaseQueue[increaseQueueLength++] = + ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | + ((currentLevel & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | + (FLAG_RECHECK_LEVEL | (ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS))); + continue; + } + + // remove ("take") lines from bitset + // can't do this during decrease, TODO WHY? + //currentPropagation ^= (bitsetLine1 | bitsetLine2 | bitsetLine3); + + // update level + section.levels[localIndex] = (short)((currentStoredLevel & ~0xFF)); + updatedPositions.putAndMoveToLast(Coordinate.key(offX, offZ), (byte)0); + + if (sourceLevel != 0) { + // re-propagate source + // note: do not set recheck level, or else the propagation will fail + if (increaseQueueLength >= increaseQueue.length) { + increaseQueue = this.resizeIncreaseQueue(); + } + increaseQueue[increaseQueueLength++] = + ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | + ((sourceLevel & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | + (FLAG_WRITE_LEVEL | (ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS))); + } + + // queue next + // note: targetLevel > 0 here, since toPropagate >= currentLevel and currentLevel > 0 + // now combine into one bitset to pass to child + // the child bitset is 4x4, so we just shift each line by 4 + // add the propagation bitset offset to each line to make it easy to OR it into the propagation queue value + final long childPropagation = + ((bitsetLine1 >>> (start)) << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = -1 + ((bitsetLine2 >>> (start + 8)) << (4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)) | // z = 0 + ((bitsetLine3 >>> (start + (8 + 8))) << (4 + 4 + COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); // z = 1 + + // don't queue update if toPropagate cannot propagate anything to neighbours + // (for increase, propagating 0 to neighbours is useless) + if (queueLength >= queue.length) { + queue = this.resizeDecreaseQueue(); + } + queue[queueLength++] = + ((long)(offX + (offZ << COORDINATE_BITS) + encodeOffset) & ((1L << (COORDINATE_BITS + COORDINATE_BITS)) - 1)) | + ((toPropagate & (LEVEL_COUNT - 1L)) << (COORDINATE_BITS + COORDINATE_BITS)) | + (ALL_DIRECTIONS_BITSET << (COORDINATE_BITS + COORDINATE_BITS + LEVEL_BITS)); //childPropagation; + continue; + } + } + + // propagate sources we clobbered + this.increaseQueueInitialLength = increaseQueueLength; + this.performIncrease(); + } + } + + private static final class Coordinate implements Comparable { + + public final long key; + + public Coordinate(final long key) { + this.key = key; + } + + public Coordinate(final int x, final int z) { + this.key = key(x, z); + } + + public static long key(final int x, final int z) { + return ((long)z << 32) | (x & 0xFFFFFFFFL); + } + + public static int x(final long key) { + return (int)key; + } + + public static int z(final long key) { + return (int)(key >>> 32); + } + + @Override + public int hashCode() { + return (int)HashCommon.mix(this.key); + } + + @Override + public boolean equals(final Object obj) { + if (this == obj) { + return true; + } + + if (!(obj instanceof Coordinate other)) { + return false; + } + + return this.key == other.key; + } + + // This class is intended for HashMap/ConcurrentHashMap usage, which do treeify bin nodes if the chain + // is too large. So we should implement compareTo to help. + @Override + public int compareTo(final Coordinate other) { + return Long.compare(this.key, other.key); + } + + @Override + public String toString() { + return "[" + x(this.key) + "," + z(this.key) + "]"; + } + } + + /* + private static final java.util.Random random = new java.util.Random(4L); + private static final List> walkers = + new java.util.ArrayList<>(); + static final int PLAYERS = 0; + static final int RAD_BLOCKS = 10000; + static final int RAD = RAD_BLOCKS >> 4; + static final int RAD_BIG_BLOCKS = 100_000; + static final int RAD_BIG = RAD_BIG_BLOCKS >> 4; + static final int VD = 4; + static final int BIG_PLAYERS = 50; + static final double WALK_CHANCE = 0.10; + static final double TP_CHANCE = 0.01; + static final int TP_BACK_PLAYERS = 200; + static final double TP_BACK_CHANCE = 0.25; + static final double TP_STEAL_CHANCE = 0.25; + private static final List> tpBack = + new java.util.ArrayList<>(); + + public static void main(final String[] args) { + final ReentrantAreaLock ticketLock = new ReentrantAreaLock(SECTION_SHIFT); + final ReentrantAreaLock schedulingLock = new ReentrantAreaLock(SECTION_SHIFT); + final Long2ByteLinkedOpenHashMap levelMap = new Long2ByteLinkedOpenHashMap(); + final Long2ByteLinkedOpenHashMap refMap = new Long2ByteLinkedOpenHashMap(); + final io.papermc.paper.util.misc.Delayed8WayDistancePropagator2D ref = new io.papermc.paper.util.misc.Delayed8WayDistancePropagator2D((final long coordinate, final byte oldLevel, final byte newLevel) -> { + if (newLevel == 0) { + refMap.remove(coordinate); + } else { + refMap.put(coordinate, newLevel); + } + }); + final ThreadedTicketLevelPropagator propagator = new ThreadedTicketLevelPropagator() { + @Override + protected void processLevelUpdates(Long2ByteLinkedOpenHashMap updates) { + for (final long key : updates.keySet()) { + final byte val = updates.get(key); + if (val == 0) { + levelMap.remove(key); + } else { + levelMap.put(key, val); + } + } + } + + @Override + protected void processSchedulingUpdates(Long2ByteLinkedOpenHashMap updates, List scheduledTasks, List changedFullStatus) {} + }; + + for (;;) { + if (walkers.isEmpty() && tpBack.isEmpty()) { + for (int i = 0; i < PLAYERS; ++i) { + int rad = i < BIG_PLAYERS ? RAD_BIG : RAD; + int posX = random.nextInt(-rad, rad + 1); + int posZ = random.nextInt(-rad, rad + 1); + + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap<>(null) { + @Override + protected void addCallback(Void parameter, int chunkX, int chunkZ) { + int src = 45 - 31 + 1; + ref.setSource(chunkX, chunkZ, src); + propagator.setSource(chunkX, chunkZ, src); + } + + @Override + protected void removeCallback(Void parameter, int chunkX, int chunkZ) { + ref.removeSource(chunkX, chunkZ); + propagator.removeSource(chunkX, chunkZ); + } + }; + + map.add(posX, posZ, VD); + + walkers.add(map); + } + for (int i = 0; i < TP_BACK_PLAYERS; ++i) { + int rad = RAD_BIG; + int posX = random.nextInt(-rad, rad + 1); + int posZ = random.nextInt(-rad, rad + 1); + + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap<>(null) { + @Override + protected void addCallback(Void parameter, int chunkX, int chunkZ) { + int src = 45 - 31 + 1; + ref.setSource(chunkX, chunkZ, src); + propagator.setSource(chunkX, chunkZ, src); + } + + @Override + protected void removeCallback(Void parameter, int chunkX, int chunkZ) { + ref.removeSource(chunkX, chunkZ); + propagator.removeSource(chunkX, chunkZ); + } + }; + + map.add(posX, posZ, random.nextInt(1, 63)); + + tpBack.add(map); + } + } else { + for (int i = 0; i < PLAYERS; ++i) { + if (random.nextDouble() > WALK_CHANCE) { + continue; + } + + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = walkers.get(i); + + int updateX = random.nextInt(-1, 2); + int updateZ = random.nextInt(-1, 2); + + map.update(map.lastChunkX + updateX, map.lastChunkZ + updateZ, VD); + } + + for (int i = 0; i < PLAYERS; ++i) { + if (random.nextDouble() > TP_CHANCE) { + continue; + } + + int rad = i < BIG_PLAYERS ? RAD_BIG : RAD; + int posX = random.nextInt(-rad, rad + 1); + int posZ = random.nextInt(-rad, rad + 1); + + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = walkers.get(i); + + map.update(posX, posZ, VD); + } + + for (int i = 0; i < TP_BACK_PLAYERS; ++i) { + if (random.nextDouble() > TP_BACK_CHANCE) { + continue; + } + + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.SingleUserAreaMap map = tpBack.get(i); + + map.update(-map.lastChunkX, -map.lastChunkZ, random.nextInt(1, 63)); + + if (random.nextDouble() > TP_STEAL_CHANCE) { + propagator.performUpdate( + map.lastChunkX >> SECTION_SHIFT, map.lastChunkZ >> SECTION_SHIFT, schedulingLock, null, null + ); + propagator.performUpdate( + (-map.lastChunkX >> SECTION_SHIFT), (-map.lastChunkZ >> SECTION_SHIFT), schedulingLock, null, null + ); + } + } + } + + ref.propagateUpdates(); + propagator.performUpdates(ticketLock, schedulingLock, null, null); + + if (!refMap.equals(levelMap)) { + throw new IllegalStateException("Error!"); + } + } + } + */ +} diff --git a/src/main/java/io/papermc/paper/chunk/system/scheduling/queue/RadiusAwarePrioritisedExecutor.java b/src/main/java/io/papermc/paper/chunk/system/scheduling/queue/RadiusAwarePrioritisedExecutor.java new file mode 100644 index 0000000000000000000000000000000000000000..f7b0e2564ac4bd2db1d2b2bdc230c9f52f8a21b7 --- /dev/null +++ b/src/main/java/io/papermc/paper/chunk/system/scheduling/queue/RadiusAwarePrioritisedExecutor.java @@ -0,0 +1,667 @@ +package io.papermc.paper.chunk.system.scheduling.queue; + +import ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor; +import io.papermc.paper.util.CoordinateUtils; +import it.unimi.dsi.fastutil.longs.Long2ReferenceOpenHashMap; +import it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet; +import java.util.ArrayList; +import java.util.Comparator; +import java.util.List; +import java.util.PriorityQueue; + +public class RadiusAwarePrioritisedExecutor { + + private static final Comparator DEPENDENCY_NODE_COMPARATOR = (final DependencyNode t1, final DependencyNode t2) -> { + return Long.compare(t1.id, t2.id); + }; + + private final DependencyTree[] queues = new DependencyTree[PrioritisedExecutor.Priority.TOTAL_SCHEDULABLE_PRIORITIES]; + private static final int NO_TASKS_QUEUED = -1; + private int selectedQueue = NO_TASKS_QUEUED; + private boolean canQueueTasks = true; + + public RadiusAwarePrioritisedExecutor(final PrioritisedExecutor executor, final int maxToSchedule) { + for (int i = 0; i < this.queues.length; ++i) { + this.queues[i] = new DependencyTree(this, executor, maxToSchedule, i); + } + } + + private boolean canQueueTasks() { + return this.canQueueTasks; + } + + private List treeFinished() { + this.canQueueTasks = true; + for (int priority = 0; priority < this.queues.length; ++priority) { + final DependencyTree queue = this.queues[priority]; + if (queue.hasWaitingTasks()) { + final List ret = queue.tryPushTasks(); + + if (ret == null || ret.isEmpty()) { + // this happens when the tasks in the wait queue were purged + // in this case, the queue was actually empty, we just had to purge it + // if we set the selected queue without scheduling any tasks, the queue will never be unselected + // as that requires a scheduled task completing... + continue; + } + + this.selectedQueue = priority; + return ret; + } + } + + this.selectedQueue = NO_TASKS_QUEUED; + + return null; + } + + private List queue(final Task task, final PrioritisedExecutor.Priority priority) { + final int priorityId = priority.priority; + final DependencyTree queue = this.queues[priorityId]; + + final DependencyNode node = new DependencyNode(task, queue); + + if (task.dependencyNode != null) { + throw new IllegalStateException(); + } + task.dependencyNode = node; + + queue.pushNode(node); + + if (this.selectedQueue == NO_TASKS_QUEUED) { + this.canQueueTasks = true; + this.selectedQueue = priorityId; + return queue.tryPushTasks(); + } + + if (!this.canQueueTasks) { + return null; + } + + if (PrioritisedExecutor.Priority.isHigherPriority(priorityId, this.selectedQueue)) { + // prevent the lower priority tree from queueing more tasks + this.canQueueTasks = false; + return null; + } + + // priorityId != selectedQueue: lower priority, don't care - treeFinished will pick it up + return priorityId == this.selectedQueue ? queue.tryPushTasks() : null; + } + + public PrioritisedExecutor.PrioritisedTask createTask(final int chunkX, final int chunkZ, final int radius, + final Runnable run, final PrioritisedExecutor.Priority priority) { + if (radius < 0) { + throw new IllegalArgumentException("Radius must be > 0: " + radius); + } + return new Task(this, chunkX, chunkZ, radius, run, priority); + } + + public PrioritisedExecutor.PrioritisedTask createTask(final int chunkX, final int chunkZ, final int radius, + final Runnable run) { + return this.createTask(chunkX, chunkZ, radius, run, PrioritisedExecutor.Priority.NORMAL); + } + + public PrioritisedExecutor.PrioritisedTask queueTask(final int chunkX, final int chunkZ, final int radius, + final Runnable run, final PrioritisedExecutor.Priority priority) { + final PrioritisedExecutor.PrioritisedTask ret = this.createTask(chunkX, chunkZ, radius, run, priority); + + ret.queue(); + + return ret; + } + + public PrioritisedExecutor.PrioritisedTask queueTask(final int chunkX, final int chunkZ, final int radius, + final Runnable run) { + final PrioritisedExecutor.PrioritisedTask ret = this.createTask(chunkX, chunkZ, radius, run); + + ret.queue(); + + return ret; + } + + public PrioritisedExecutor.PrioritisedTask createInfiniteRadiusTask(final Runnable run, final PrioritisedExecutor.Priority priority) { + return new Task(this, 0, 0, -1, run, priority); + } + + public PrioritisedExecutor.PrioritisedTask createInfiniteRadiusTask(final Runnable run) { + return this.createInfiniteRadiusTask(run, PrioritisedExecutor.Priority.NORMAL); + } + + public PrioritisedExecutor.PrioritisedTask queueInfiniteRadiusTask(final Runnable run, final PrioritisedExecutor.Priority priority) { + final PrioritisedExecutor.PrioritisedTask ret = this.createInfiniteRadiusTask(run, priority); + + ret.queue(); + + return ret; + } + + public PrioritisedExecutor.PrioritisedTask queueInfiniteRadiusTask(final Runnable run) { + final PrioritisedExecutor.PrioritisedTask ret = this.createInfiniteRadiusTask(run, PrioritisedExecutor.Priority.NORMAL); + + ret.queue(); + + return ret; + } + + // all accesses must be synchronised by the radius aware object + private static final class DependencyTree { + + private final RadiusAwarePrioritisedExecutor scheduler; + private final PrioritisedExecutor executor; + private final int maxToSchedule; + private final int treeIndex; + + private int currentlyExecuting; + private long idGenerator; + + private final PriorityQueue awaiting = new PriorityQueue<>(DEPENDENCY_NODE_COMPARATOR); + + private final PriorityQueue infiniteRadius = new PriorityQueue<>(DEPENDENCY_NODE_COMPARATOR); + private boolean isInfiniteRadiusScheduled; + + private final Long2ReferenceOpenHashMap nodeByPosition = new Long2ReferenceOpenHashMap<>(); + + public DependencyTree(final RadiusAwarePrioritisedExecutor scheduler, final PrioritisedExecutor executor, + final int maxToSchedule, final int treeIndex) { + this.scheduler = scheduler; + this.executor = executor; + this.maxToSchedule = maxToSchedule; + this.treeIndex = treeIndex; + } + + public boolean hasWaitingTasks() { + return !this.awaiting.isEmpty() || !this.infiniteRadius.isEmpty(); + } + + private long nextId() { + return this.idGenerator++; + } + + private boolean isExecutingAnyTasks() { + return this.currentlyExecuting != 0; + } + + private void pushNode(final DependencyNode node) { + if (!node.task.isFiniteRadius()) { + this.infiniteRadius.add(node); + return; + } + + // set up dependency for node + final Task task = node.task; + + final int centerX = task.chunkX; + final int centerZ = task.chunkZ; + final int radius = task.radius; + + final int minX = centerX - radius; + final int maxX = centerX + radius; + + final int minZ = centerZ - radius; + final int maxZ = centerZ + radius; + + ReferenceOpenHashSet parents = null; + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + final DependencyNode dependency = this.nodeByPosition.put(CoordinateUtils.getChunkKey(currX, currZ), node); + if (dependency != null) { + if (parents == null) { + parents = new ReferenceOpenHashSet<>(); + } + if (parents.add(dependency)) { + // added a dependency, so we need to add as a child to the dependency + if (dependency.children == null) { + dependency.children = new ArrayList<>(); + } + dependency.children.add(node); + } + } + } + } + + if (parents == null) { + // no dependencies, add straight to awaiting + this.awaiting.add(node); + } else { + node.parents = parents.size(); + // we will be added to awaiting once we have no parents + } + } + + // called only when a node is returned after being executed + private List returnNode(final DependencyNode node) { + final Task task = node.task; + + // now that the task is completed, we can push its children to the awaiting queue + this.pushChildren(node); + + if (task.isFiniteRadius()) { + // remove from dependency map + this.removeNodeFromMap(node); + } else { + // mark as no longer executing infinite radius + if (!this.isInfiniteRadiusScheduled) { + throw new IllegalStateException(); + } + this.isInfiniteRadiusScheduled = false; + } + + // decrement executing count, we are done executing this task + --this.currentlyExecuting; + + if (this.currentlyExecuting == 0) { + return this.scheduler.treeFinished(); + } + + return this.scheduler.canQueueTasks() ? this.tryPushTasks() : null; + } + + private List tryPushTasks() { + // tasks are not queued, but only created here - we do hold the lock for the map + List ret = null; + PrioritisedExecutor.PrioritisedTask pushedTask; + while ((pushedTask = this.tryPushTask()) != null) { + if (ret == null) { + ret = new ArrayList<>(); + } + ret.add(pushedTask); + } + + return ret; + } + + private void removeNodeFromMap(final DependencyNode node) { + final Task task = node.task; + + final int centerX = task.chunkX; + final int centerZ = task.chunkZ; + final int radius = task.radius; + + final int minX = centerX - radius; + final int maxX = centerX + radius; + + final int minZ = centerZ - radius; + final int maxZ = centerZ + radius; + + for (int currZ = minZ; currZ <= maxZ; ++currZ) { + for (int currX = minX; currX <= maxX; ++currX) { + this.nodeByPosition.remove(CoordinateUtils.getChunkKey(currX, currZ), node); + } + } + } + + private void pushChildren(final DependencyNode node) { + // add all the children that we can into awaiting + final List children = node.children; + if (children != null) { + for (int i = 0, len = children.size(); i < len; ++i) { + final DependencyNode child = children.get(i); + int newParents = --child.parents; + if (newParents == 0) { + // no more dependents, we can push to awaiting + // even if the child is purged, we need to push it so that its children will be pushed + this.awaiting.add(child); + } else if (newParents < 0) { + throw new IllegalStateException(); + } + } + } + } + + private DependencyNode pollAwaiting() { + final DependencyNode ret = this.awaiting.poll(); + if (ret == null) { + return ret; + } + + if (ret.parents != 0) { + throw new IllegalStateException(); + } + + if (ret.purged) { + // need to manually remove from state here + this.pushChildren(ret); + this.removeNodeFromMap(ret); + } // else: delay children push until the task has finished + + return ret; + } + + private DependencyNode pollInfinite() { + return this.infiniteRadius.poll(); + } + + public PrioritisedExecutor.PrioritisedTask tryPushTask() { + if (this.currentlyExecuting >= this.maxToSchedule || this.isInfiniteRadiusScheduled) { + return null; + } + + DependencyNode firstInfinite; + while ((firstInfinite = this.infiniteRadius.peek()) != null && firstInfinite.purged) { + this.pollInfinite(); + } + + DependencyNode firstAwaiting; + while ((firstAwaiting = this.awaiting.peek()) != null && firstAwaiting.purged) { + this.pollAwaiting(); + } + + if (firstInfinite == null && firstAwaiting == null) { + return null; + } + + // firstAwaiting compared to firstInfinite + final int compare; + + if (firstAwaiting == null) { + // we choose first infinite, or infinite < awaiting + compare = 1; + } else if (firstInfinite == null) { + // we choose first awaiting, or awaiting < infinite + compare = -1; + } else { + compare = DEPENDENCY_NODE_COMPARATOR.compare(firstAwaiting, firstInfinite); + } + + if (compare >= 0) { + if (this.currentlyExecuting != 0) { + // don't queue infinite task while other tasks are executing in parallel + return null; + } + ++this.currentlyExecuting; + this.pollInfinite(); + this.isInfiniteRadiusScheduled = true; + return firstInfinite.task.pushTask(this.executor); + } else { + ++this.currentlyExecuting; + this.pollAwaiting(); + return firstAwaiting.task.pushTask(this.executor); + } + } + } + + private static final class DependencyNode { + + private final Task task; + private final DependencyTree tree; + + // dependency tree fields + // (must hold lock on the scheduler to use) + // null is the same as empty, we just use it so that we don't allocate the set unless we need to + private List children; + // 0 indicates that this task is considered "awaiting" + private int parents; + // false -> scheduled and not cancelled + // true -> scheduled but cancelled + private boolean purged; + private final long id; + + public DependencyNode(final Task task, final DependencyTree tree) { + this.task = task; + this.id = tree.nextId(); + this.tree = tree; + } + } + + private static final class Task implements PrioritisedExecutor.PrioritisedTask, Runnable { + + // task specific fields + private final RadiusAwarePrioritisedExecutor scheduler; + private final int chunkX; + private final int chunkZ; + private final int radius; + private Runnable run; + private PrioritisedExecutor.Priority priority; + + private DependencyNode dependencyNode; + private PrioritisedExecutor.PrioritisedTask queuedTask; + + private Task(final RadiusAwarePrioritisedExecutor scheduler, final int chunkX, final int chunkZ, final int radius, + final Runnable run, final PrioritisedExecutor.Priority priority) { + this.scheduler = scheduler; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.radius = radius; + this.run = run; + this.priority = priority; + } + + private boolean isFiniteRadius() { + return this.radius >= 0; + } + + private PrioritisedExecutor.PrioritisedTask pushTask(final PrioritisedExecutor executor) { + return this.queuedTask = executor.createTask(this, this.priority); + } + + private void executeTask() { + final Runnable run = this.run; + this.run = null; + run.run(); + } + + private static void scheduleTasks(final List toSchedule) { + if (toSchedule != null) { + for (int i = 0, len = toSchedule.size(); i < len; ++i) { + toSchedule.get(i).queue(); + } + } + } + + private void returnNode() { + final List toSchedule; + synchronized (this.scheduler) { + final DependencyNode node = this.dependencyNode; + this.dependencyNode = null; + toSchedule = node.tree.returnNode(node); + } + + scheduleTasks(toSchedule); + } + + @Override + public void run() { + final Runnable run = this.run; + this.run = null; + try { + run.run(); + } finally { + this.returnNode(); + } + } + + @Override + public boolean queue() { + final List toSchedule; + synchronized (this.scheduler) { + if (this.queuedTask != null || this.dependencyNode != null || this.priority == PrioritisedExecutor.Priority.COMPLETING) { + return false; + } + + toSchedule = this.scheduler.queue(this, this.priority); + } + + scheduleTasks(toSchedule); + return true; + } + + @Override + public boolean cancel() { + final PrioritisedExecutor.PrioritisedTask task; + synchronized (this.scheduler) { + if ((task = this.queuedTask) == null) { + if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { + return false; + } + + this.priority = PrioritisedExecutor.Priority.COMPLETING; + if (this.dependencyNode != null) { + this.dependencyNode.purged = true; + this.dependencyNode = null; + } + + return true; + } + } + + if (task.cancel()) { + // must manually return the node + this.run = null; + this.returnNode(); + return true; + } + return false; + } + + @Override + public boolean execute() { + final PrioritisedExecutor.PrioritisedTask task; + synchronized (this.scheduler) { + if ((task = this.queuedTask) == null) { + if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { + return false; + } + + this.priority = PrioritisedExecutor.Priority.COMPLETING; + if (this.dependencyNode != null) { + this.dependencyNode.purged = true; + this.dependencyNode = null; + } + // fall through to execution logic + } + } + + if (task != null) { + // will run the return node logic automatically + return task.execute(); + } else { + // don't run node removal/insertion logic, we aren't actually removed from the dependency tree + this.executeTask(); + return true; + } + } + + @Override + public PrioritisedExecutor.Priority getPriority() { + final PrioritisedExecutor.PrioritisedTask task; + synchronized (this.scheduler) { + if ((task = this.queuedTask) == null) { + return this.priority; + } + } + + return task.getPriority(); + } + + @Override + public boolean setPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + final PrioritisedExecutor.PrioritisedTask task; + List toSchedule = null; + synchronized (this.scheduler) { + if ((task = this.queuedTask) == null) { + if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { + return false; + } + + if (this.priority == priority) { + return true; + } + + this.priority = priority; + if (this.dependencyNode != null) { + // need to re-insert node + this.dependencyNode.purged = true; + this.dependencyNode = null; + toSchedule = this.scheduler.queue(this, priority); + } + } + } + + if (task != null) { + return task.setPriority(priority); + } + + scheduleTasks(toSchedule); + + return true; + } + + @Override + public boolean raisePriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + final PrioritisedExecutor.PrioritisedTask task; + List toSchedule = null; + synchronized (this.scheduler) { + if ((task = this.queuedTask) == null) { + if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { + return false; + } + + if (this.priority.isHigherOrEqualPriority(priority)) { + return true; + } + + this.priority = priority; + if (this.dependencyNode != null) { + // need to re-insert node + this.dependencyNode.purged = true; + this.dependencyNode = null; + toSchedule = this.scheduler.queue(this, priority); + } + } + } + + if (task != null) { + return task.raisePriority(priority); + } + + scheduleTasks(toSchedule); + + return true; + } + + @Override + public boolean lowerPriority(final PrioritisedExecutor.Priority priority) { + if (!PrioritisedExecutor.Priority.isValidPriority(priority)) { + throw new IllegalArgumentException("Invalid priority " + priority); + } + + final PrioritisedExecutor.PrioritisedTask task; + List toSchedule = null; + synchronized (this.scheduler) { + if ((task = this.queuedTask) == null) { + if (this.priority == PrioritisedExecutor.Priority.COMPLETING) { + return false; + } + + if (this.priority.isLowerOrEqualPriority(priority)) { + return true; + } + + this.priority = priority; + if (this.dependencyNode != null) { + // need to re-insert node + this.dependencyNode.purged = true; + this.dependencyNode = null; + toSchedule = this.scheduler.queue(this, priority); + } + } + } + + if (task != null) { + return task.lowerPriority(priority); + } + + scheduleTasks(toSchedule); + + return true; + } + } +} diff --git a/src/main/java/io/papermc/paper/command/PaperCommand.java b/src/main/java/io/papermc/paper/command/PaperCommand.java index e47fb2aa5e885162cae5cbfc9f33ff7864bf538e..b68b37274f22c2a89d723aec4d1c6be813eef73c 100644 --- a/src/main/java/io/papermc/paper/command/PaperCommand.java +++ b/src/main/java/io/papermc/paper/command/PaperCommand.java @@ -43,6 +43,7 @@ public final class PaperCommand extends Command { commands.put(Set.of("mobcaps", "playermobcaps"), new MobcapsCommand()); commands.put(Set.of("dumplisteners"), new DumpListenersCommand()); commands.put(Set.of("fixlight"), new FixLightCommand()); + commands.put(Set.of("debug", "chunkinfo", "holderinfo"), new ChunkDebugCommand()); return commands.entrySet().stream() .flatMap(entry -> entry.getKey().stream().map(s -> Map.entry(s, entry.getValue()))) diff --git a/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java new file mode 100644 index 0000000000000000000000000000000000000000..962d3cae6340fc11607b59355e291629618f289c --- /dev/null +++ b/src/main/java/io/papermc/paper/command/subcommands/ChunkDebugCommand.java @@ -0,0 +1,265 @@ +package io.papermc.paper.command.subcommands; + +import io.papermc.paper.command.CommandUtil; +import io.papermc.paper.command.PaperSubcommand; +import java.io.File; +import java.time.LocalDateTime; +import java.time.format.DateTimeFormatter; +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; +import java.util.Locale; +import io.papermc.paper.util.MCUtil; +import net.minecraft.server.MinecraftServer; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.FullChunkStatus; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.ImposterProtoChunk; +import net.minecraft.world.level.chunk.LevelChunk; +import net.minecraft.world.level.chunk.ProtoChunk; +import org.bukkit.Bukkit; +import org.bukkit.command.CommandSender; +import org.bukkit.craftbukkit.CraftWorld; +import org.checkerframework.checker.nullness.qual.NonNull; +import org.checkerframework.checker.nullness.qual.Nullable; +import org.checkerframework.framework.qual.DefaultQualifier; + +import static net.kyori.adventure.text.Component.text; +import static net.kyori.adventure.text.format.NamedTextColor.BLUE; +import static net.kyori.adventure.text.format.NamedTextColor.DARK_AQUA; +import static net.kyori.adventure.text.format.NamedTextColor.GREEN; +import static net.kyori.adventure.text.format.NamedTextColor.RED; + +@DefaultQualifier(NonNull.class) +public final class ChunkDebugCommand implements PaperSubcommand { + @Override + public boolean execute(final CommandSender sender, final String subCommand, final String[] args) { + switch (subCommand) { + case "debug" -> this.doDebug(sender, args); + case "chunkinfo" -> this.doChunkInfo(sender, args); + case "holderinfo" -> this.doHolderInfo(sender, args); + } + return true; + } + + @Override + public List tabComplete(final CommandSender sender, final String subCommand, final String[] args) { + switch (subCommand) { + case "debug" -> { + if (args.length == 1) { + return CommandUtil.getListMatchingLast(sender, args, "help", "chunks"); + } + } + case "holderinfo" -> { + List worldNames = new ArrayList<>(); + worldNames.add("*"); + for (org.bukkit.World world : Bukkit.getWorlds()) { + worldNames.add(world.getName()); + } + if (args.length == 1) { + return CommandUtil.getListMatchingLast(sender, args, worldNames); + } + } + case "chunkinfo" -> { + List worldNames = new ArrayList<>(); + worldNames.add("*"); + for (org.bukkit.World world : Bukkit.getWorlds()) { + worldNames.add(world.getName()); + } + if (args.length == 1) { + return CommandUtil.getListMatchingLast(sender, args, worldNames); + } + } + } + return Collections.emptyList(); + } + + private void doChunkInfo(final CommandSender sender, final String[] args) { + List worlds; + if (args.length < 1 || args[0].equals("*")) { + worlds = Bukkit.getWorlds(); + } else { + worlds = new ArrayList<>(args.length); + for (final String arg : args) { + org.bukkit.@Nullable World world = Bukkit.getWorld(arg); + if (world == null) { + sender.sendMessage(text("World '" + arg + "' is invalid", RED)); + return; + } + worlds.add(world); + } + } + + int accumulatedTotal = 0; + int accumulatedInactive = 0; + int accumulatedBorder = 0; + int accumulatedTicking = 0; + int accumulatedEntityTicking = 0; + + for (final org.bukkit.World bukkitWorld : worlds) { + final ServerLevel world = ((CraftWorld) bukkitWorld).getHandle(); + + int total = 0; + int inactive = 0; + int full = 0; + int blockTicking = 0; + int entityTicking = 0; + + for (final ChunkHolder chunk : io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(world)) { + if (chunk.getFullChunkNowUnchecked() == null) { + continue; + } + + ++total; + + FullChunkStatus state = chunk.getFullStatus(); + + switch (state) { + case INACCESSIBLE -> ++inactive; + case FULL -> ++full; + case BLOCK_TICKING -> ++blockTicking; + case ENTITY_TICKING -> ++entityTicking; + } + } + + accumulatedTotal += total; + accumulatedInactive += inactive; + accumulatedBorder += full; + accumulatedTicking += blockTicking; + accumulatedEntityTicking += entityTicking; + + sender.sendMessage(text().append(text("Chunks in ", BLUE), text(bukkitWorld.getName(), GREEN), text(":"))); + sender.sendMessage(text().color(DARK_AQUA).append( + text("Total: ", BLUE), text(total), + text(" Inactive: ", BLUE), text(inactive), + text(" Full: ", BLUE), text(full), + text(" Block Ticking: ", BLUE), text(blockTicking), + text(" Entity Ticking: ", BLUE), text(entityTicking) + )); + } + if (worlds.size() > 1) { + sender.sendMessage(text().append(text("Chunks in ", BLUE), text("all listed worlds", GREEN), text(":", DARK_AQUA))); + sender.sendMessage(text().color(DARK_AQUA).append( + text("Total: ", BLUE), text(accumulatedTotal), + text(" Inactive: ", BLUE), text(accumulatedInactive), + text(" Full: ", BLUE), text(accumulatedBorder), + text(" Block Ticking: ", BLUE), text(accumulatedTicking), + text(" Entity Ticking: ", BLUE), text(accumulatedEntityTicking) + )); + } + } + + private void doHolderInfo(final CommandSender sender, final String[] args) { + List worlds; + if (args.length < 1 || args[0].equals("*")) { + worlds = Bukkit.getWorlds(); + } else { + worlds = new ArrayList<>(args.length); + for (final String arg : args) { + org.bukkit.@Nullable World world = Bukkit.getWorld(arg); + if (world == null) { + sender.sendMessage(text("World '" + arg + "' is invalid", RED)); + return; + } + worlds.add(world); + } + } + + int accumulatedTotal = 0; + int accumulatedCanUnload = 0; + int accumulatedNull = 0; + int accumulatedReadOnly = 0; + int accumulatedProtoChunk = 0; + int accumulatedFullChunk = 0; + + for (final org.bukkit.World bukkitWorld : worlds) { + final ServerLevel world = ((CraftWorld) bukkitWorld).getHandle(); + + int total = 0; + int canUnload = 0; + int nullChunks = 0; + int readOnly = 0; + int protoChunk = 0; + int fullChunk = 0; + + for (final ChunkHolder chunk : world.chunkTaskScheduler.chunkHolderManager.getOldChunkHolders()) { // Paper - change updating chunks map + final ChunkAccess lastChunk = chunk.getAvailableChunkNow(); + + ++total; + + if (lastChunk == null) { + ++nullChunks; + } else if (lastChunk instanceof ImposterProtoChunk) { + ++readOnly; + } else if (lastChunk instanceof ProtoChunk) { + ++protoChunk; + } else if (lastChunk instanceof LevelChunk) { + ++fullChunk; + } + + if (chunk.newChunkHolder.isSafeToUnload() == null) { + ++canUnload; + } + } + + accumulatedTotal += total; + accumulatedCanUnload += canUnload; + accumulatedNull += nullChunks; + accumulatedReadOnly += readOnly; + accumulatedProtoChunk += protoChunk; + accumulatedFullChunk += fullChunk; + + sender.sendMessage(text().append(text("Chunks in ", BLUE), text(bukkitWorld.getName(), GREEN), text(":"))); + sender.sendMessage(text().color(DARK_AQUA).append( + text("Total: ", BLUE), text(total), + text(" Unloadable: ", BLUE), text(canUnload), + text(" Null: ", BLUE), text(nullChunks), + text(" ReadOnly: ", BLUE), text(readOnly), + text(" Proto: ", BLUE), text(protoChunk), + text(" Full: ", BLUE), text(fullChunk) + )); + } + if (worlds.size() > 1) { + sender.sendMessage(text().append(text("Chunks in ", BLUE), text("all listed worlds", GREEN), text(":", DARK_AQUA))); + sender.sendMessage(text().color(DARK_AQUA).append( + text("Total: ", BLUE), text(accumulatedTotal), + text(" Unloadable: ", BLUE), text(accumulatedCanUnload), + text(" Null: ", BLUE), text(accumulatedNull), + text(" ReadOnly: ", BLUE), text(accumulatedReadOnly), + text(" Proto: ", BLUE), text(accumulatedProtoChunk), + text(" Full: ", BLUE), text(accumulatedFullChunk) + )); + } + } + + private void doDebug(final CommandSender sender, final String[] args) { + if (args.length < 1) { + sender.sendMessage(text("Use /paper debug [chunks] help for more information on a specific command", RED)); + return; + } + + final String debugType = args[0].toLowerCase(Locale.ENGLISH); + switch (debugType) { + case "chunks" -> { + if (args.length >= 2 && args[1].toLowerCase(Locale.ENGLISH).equals("help")) { + sender.sendMessage(text("Use /paper debug chunks [world] to dump loaded chunk information to a file", RED)); + break; + } + File file = new File(new File(new File("."), "debug"), + "chunks-" + DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(LocalDateTime.now()) + ".txt"); + sender.sendMessage(text("Writing chunk information dump to " + file, GREEN)); + try { + MCUtil.dumpChunks(file, false); + sender.sendMessage(text("Successfully written chunk information!", GREEN)); + } catch (Throwable thr) { + MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr); + sender.sendMessage(text("Failed to dump chunk information, see console", RED)); + } + } + // "help" & default + default -> sender.sendMessage(text("Use /paper debug [chunks] help for more information on a specific command", RED)); + } + } + +} diff --git a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java index 481cfe3a291196c0391c2ec8560e566e0e1e2fb8..30fe1c0645a07d663b08c0f988a1ab3a750bf7c4 100644 --- a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java +++ b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java @@ -29,6 +29,45 @@ public class GlobalConfiguration extends ConfigurationPart { public static GlobalConfiguration get() { return instance; } + + public ChunkLoadingBasic chunkLoadingBasic; + + public class ChunkLoadingBasic extends ConfigurationPart { + @Comment("The maximum rate in chunks per second that the server will send to any individual player. Set to -1 to disable this limit.") + public double playerMaxChunkSendRate = 75.0; + + @Comment( + "The maximum rate at which chunks will load for any individual player. " + + "Note that this setting also affects chunk generations, since a chunk load is always first issued to test if a" + + "chunk is already generated. Set to -1 to disable this limit." + ) + public double playerMaxChunkLoadRate = 100.0; + + @Comment("The maximum rate at which chunks will generate for any individual player. Set to -1 to disable this limit.") + public double playerMaxChunkGenerateRate = -1.0; + } + + public ChunkLoadingAdvanced chunkLoadingAdvanced; + + public class ChunkLoadingAdvanced extends ConfigurationPart { + @Comment( + "Set to true if the server will match the chunk send radius that clients have configured" + + "in their view distance settings if the client is less-than the server's send distance." + ) + public boolean autoConfigSendDistance = true; + + @Comment( + "Specifies the maximum amount of concurrent chunk loads that an individual player can have." + + "Set to 0 to let the server configure it automatically per player, or set it to -1 to disable the limit." + ) + public int playerMaxConcurrentChunkLoads = 0; + + @Comment( + "Specifies the maximum amount of concurrent chunk generations that an individual player can have." + + "Set to 0 to let the server configure it automatically per player, or set it to -1 to disable the limit." + ) + public int playerMaxConcurrentChunkGenerates = 0; + } static void set(GlobalConfiguration instance) { GlobalConfiguration.instance = instance; } @@ -130,21 +169,6 @@ public class GlobalConfiguration extends ConfigurationPart { public int incomingPacketThreshold = 300; } - public ChunkLoading chunkLoading; - - public class ChunkLoading extends ConfigurationPart { - public int minLoadRadius = 2; - public int maxConcurrentSends = 2; - public boolean autoconfigSendDistance = true; - public double targetPlayerChunkSendRate = 100.0; - public double globalMaxChunkSendRate = -1.0; - public boolean enableFrustumPriority = false; - public double globalMaxChunkLoadRate = -1.0; - public double playerMaxConcurrentLoads = 20.0; - public double globalMaxConcurrentLoads = 500.0; - public double playerMaxChunkLoadRate = -1.0; - } - public UnsupportedSettings unsupportedSettings; public class UnsupportedSettings extends ConfigurationPart { @@ -203,7 +227,7 @@ public class GlobalConfiguration extends ConfigurationPart { @PostProcess private void postProcess() { - //io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.init(this); + io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.init(this); } } diff --git a/src/main/java/io/papermc/paper/threadedregions/TickRegions.java b/src/main/java/io/papermc/paper/threadedregions/TickRegions.java new file mode 100644 index 0000000000000000000000000000000000000000..d5d39e9c1f326e91010237b0db80d527ac52f4d6 --- /dev/null +++ b/src/main/java/io/papermc/paper/threadedregions/TickRegions.java @@ -0,0 +1,9 @@ +package io.papermc.paper.threadedregions; + +// placeholder class for Folia +public class TickRegions { + + public static int getRegionChunkShift() { + return 4; + } +} diff --git a/src/main/java/io/papermc/paper/util/IntervalledCounter.java b/src/main/java/io/papermc/paper/util/IntervalledCounter.java index cea9c098ade00ee87b8efc8164ab72f5279758f0..197224e31175252d8438a8df585bbb65f2288d7f 100644 --- a/src/main/java/io/papermc/paper/util/IntervalledCounter.java +++ b/src/main/java/io/papermc/paper/util/IntervalledCounter.java @@ -2,6 +2,8 @@ package io.papermc.paper.util; public final class IntervalledCounter { + private static final int INITIAL_SIZE = 8; + protected long[] times; protected long[] counts; protected final long interval; @@ -11,8 +13,8 @@ public final class IntervalledCounter { protected int tail; // exclusive public IntervalledCounter(final long interval) { - this.times = new long[8]; - this.counts = new long[8]; + this.times = new long[INITIAL_SIZE]; + this.counts = new long[INITIAL_SIZE]; this.interval = interval; } @@ -67,13 +69,13 @@ public final class IntervalledCounter { this.tail = nextTail; } - public void updateAndAdd(final int count) { + public void updateAndAdd(final long count) { final long currTime = System.nanoTime(); this.updateCurrentTime(currTime); this.addTime(currTime, count); } - public void updateAndAdd(final int count, final long currTime) { + public void updateAndAdd(final long count, final long currTime) { this.updateCurrentTime(currTime); this.addTime(currTime, count); } @@ -93,9 +95,13 @@ public final class IntervalledCounter { this.tail = size; if (tail >= head) { + // sequentially ordered from [head, tail) System.arraycopy(oldElements, head, newElements, 0, size); System.arraycopy(oldCounts, head, newCounts, 0, size); } else { + // ordered from [head, length) + // then followed by [0, tail) + System.arraycopy(oldElements, head, newElements, 0, oldElements.length - head); System.arraycopy(oldElements, 0, newElements, oldElements.length - head, tail); @@ -106,10 +112,18 @@ public final class IntervalledCounter { // returns in units per second public double getRate() { - return this.size() / (this.interval * 1.0e-9); + return (double)this.sum / ((double)this.interval * 1.0E-9); + } + + public long getInterval() { + return this.interval; } - public long size() { + public long getSum() { return this.sum; } + + public int totalDataPoints() { + return this.tail >= this.head ? (this.tail - this.head) : (this.tail + (this.counts.length - this.head)); + } } diff --git a/src/main/java/io/papermc/paper/util/MCUtil.java b/src/main/java/io/papermc/paper/util/MCUtil.java index 5c401c7e30ed5f6f32b1ad6523537aa46173cff5..e5c2e53388ff61e4aeae22a74b525d9a26ea0200 100644 --- a/src/main/java/io/papermc/paper/util/MCUtil.java +++ b/src/main/java/io/papermc/paper/util/MCUtil.java @@ -7,17 +7,30 @@ import com.google.common.util.concurrent.ThreadFactoryBuilder; import io.papermc.paper.math.BlockPosition; import io.papermc.paper.math.FinePosition; import io.papermc.paper.math.Position; +import com.google.gson.JsonArray; +import com.google.gson.JsonObject; +import com.google.gson.internal.Streams; +import com.google.gson.stream.JsonWriter; +import com.mojang.datafixers.util.Either; import it.unimi.dsi.fastutil.objects.ObjectRBTreeSet; import java.lang.ref.Cleaner; +import it.unimi.dsi.fastutil.objects.ReferenceArrayList; import net.minecraft.core.BlockPos; import net.minecraft.core.Direction; import net.minecraft.core.Vec3i; import net.minecraft.server.MinecraftServer; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.ChunkMap; +import net.minecraft.server.level.DistanceManager; import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.ServerPlayer; +import net.minecraft.server.level.Ticket; import net.minecraft.world.entity.Entity; import net.minecraft.world.level.ChunkPos; import net.minecraft.world.level.ClipContext; import net.minecraft.world.level.Level; +import net.minecraft.world.level.chunk.ChunkAccess; +import net.minecraft.world.level.chunk.status.ChunkStatus; import net.minecraft.world.phys.Vec3; import org.apache.commons.lang.exception.ExceptionUtils; import com.mojang.authlib.GameProfile; @@ -30,8 +43,11 @@ import org.spigotmc.AsyncCatcher; import javax.annotation.Nonnull; import javax.annotation.Nullable; +import java.io.*; +import java.nio.charset.StandardCharsets; import java.util.List; import java.util.Queue; +import java.util.Set; import java.util.concurrent.CompletableFuture; import java.util.concurrent.ExecutionException; import java.util.concurrent.LinkedBlockingQueue; @@ -532,6 +548,98 @@ public final class MCUtil { } } + public static ChunkStatus getChunkStatus(ChunkHolder chunk) { + return chunk.getChunkHolderStatus(); + } + + public static void dumpChunks(File file, boolean watchdog) throws IOException { + file.getParentFile().mkdirs(); + file.createNewFile(); + ReferenceArrayList worlds = new ReferenceArrayList<>(org.bukkit.Bukkit.getWorlds()); + ReferenceArrayList loadedWorlds = new ReferenceArrayList<>(worlds); + JsonObject data = new JsonObject(); + + data.addProperty("server-version", org.bukkit.Bukkit.getVersion()); + data.addProperty("data-version", 1); + + { + JsonArray players = new JsonArray(); + data.add("all-players", players); + List playerList = MinecraftServer.getServer().getPlayerList().players; + for (ServerPlayer player : playerList) { + JsonObject playerData = new JsonObject(); + players.add(playerData); + + Level playerWorld = player.level(); + org.bukkit.World craftWorld = playerWorld.getWorld(); + Entity.RemovalReason removalReason = player.getRemovalReason(); + + playerData.addProperty("name", player.getScoreboardName()); + playerData.addProperty("x", player.getX()); + playerData.addProperty("y", player.getY()); + playerData.addProperty("z", player.getZ()); + playerData.addProperty("world", playerWorld == null ? "null world" : craftWorld.getName()); + playerData.addProperty("removalReason", removalReason == null ? "null" : removalReason.name()); + + if (!worlds.contains(craftWorld)) { + worlds.add(craftWorld); + } + } + } + + JsonArray chunkWaitInformation = new JsonArray(); + data.add("chunk-wait-infos", chunkWaitInformation); + + for (io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.ChunkInfo chunkInfo : io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.getChunkInfos()) { + chunkWaitInformation.add(chunkInfo.toString()); + } + + JsonArray worldsData = new JsonArray(); + + for (org.bukkit.World bukkitWorld : worlds) { + JsonObject worldData = new JsonObject(); + + ServerLevel world = ((org.bukkit.craftbukkit.CraftWorld)bukkitWorld).getHandle(); + List players = world.players(); + + worldData.addProperty("is-loaded", loadedWorlds.contains(bukkitWorld)); + worldData.addProperty("name", world.getWorld().getName()); + worldData.addProperty("view-distance", world.getWorld().getViewDistance()); // Paper - replace chunk loader system + worldData.addProperty("tick-view-distance", world.getWorld().getSimulationDistance()); // Paper - replace chunk loader system + + JsonArray playersData = new JsonArray(); + + for (ServerPlayer player : players) { + JsonObject playerData = new JsonObject(); + + playerData.addProperty("name", player.getScoreboardName()); + playerData.addProperty("x", player.getX()); + playerData.addProperty("y", player.getY()); + playerData.addProperty("z", player.getZ()); + + playersData.add(playerData); + } + + worldData.add("players", playersData); + worldData.add("chunk-data", watchdog ? world.chunkTaskScheduler.chunkHolderManager.getDebugJsonForWatchdog() : world.chunkTaskScheduler.chunkHolderManager.getDebugJson()); + worldsData.add(worldData); + } + + data.add("worlds", worldsData); + + StringWriter stringWriter = new StringWriter(); + JsonWriter jsonWriter = new JsonWriter(stringWriter); + jsonWriter.setIndent(" "); + jsonWriter.setLenient(false); + Streams.write(data, jsonWriter); + + String fileData = stringWriter.toString(); + + try (PrintStream out = new PrintStream(new FileOutputStream(file), false, StandardCharsets.UTF_8)) { + out.print(fileData); + } + } + public static int getTicketLevelFor(net.minecraft.world.level.chunk.status.ChunkStatus status) { return net.minecraft.server.level.ChunkMap.MAX_VIEW_DISTANCE + net.minecraft.world.level.chunk.status.ChunkStatus.getDistance(status); } diff --git a/src/main/java/io/papermc/paper/util/TickThread.java b/src/main/java/io/papermc/paper/util/TickThread.java index 73e83d56a340f0c7dcb8ff737d621003e72c6de4..bdaf062f9b66ceab303a0807eca301342886a8ea 100644 --- a/src/main/java/io/papermc/paper/util/TickThread.java +++ b/src/main/java/io/papermc/paper/util/TickThread.java @@ -1,12 +1,20 @@ package io.papermc.paper.util; +import net.minecraft.core.BlockPos; import net.minecraft.server.MinecraftServer; import net.minecraft.server.level.ServerLevel; +import net.minecraft.server.level.ServerPlayer; +import net.minecraft.server.network.ServerGamePacketListenerImpl; +import net.minecraft.util.Mth; import net.minecraft.world.entity.Entity; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.Level; +import net.minecraft.world.phys.AABB; +import net.minecraft.world.phys.Vec3; import org.bukkit.Bukkit; import java.util.concurrent.atomic.AtomicInteger; -public final class TickThread extends Thread { +public class TickThread extends Thread { public static final boolean STRICT_THREAD_CHECKS = Boolean.getBoolean("paper.strict-thread-checks"); @@ -16,6 +24,10 @@ public final class TickThread extends Thread { } } + /** + * @deprecated + */ + @Deprecated public static void softEnsureTickThread(final String reason) { if (!STRICT_THREAD_CHECKS) { return; @@ -23,6 +35,10 @@ public final class TickThread extends Thread { ensureTickThread(reason); } + /** + * @deprecated + */ + @Deprecated public static void ensureTickThread(final String reason) { if (!isTickThread()) { MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); @@ -30,6 +46,20 @@ public final class TickThread extends Thread { } } + public static void ensureTickThread(final ServerLevel world, final BlockPos pos, final String reason) { + if (!isTickThreadFor(world, pos)) { + MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); + throw new IllegalStateException(reason); + } + } + + public static void ensureTickThread(final ServerLevel world, final ChunkPos pos, final String reason) { + if (!isTickThreadFor(world, pos)) { + MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); + throw new IllegalStateException(reason); + } + } + public static void ensureTickThread(final ServerLevel world, final int chunkX, final int chunkZ, final String reason) { if (!isTickThreadFor(world, chunkX, chunkZ)) { MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); @@ -44,6 +74,20 @@ public final class TickThread extends Thread { } } + public static void ensureTickThread(final ServerLevel world, final AABB aabb, final String reason) { + if (!isTickThreadFor(world, aabb)) { + MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); + throw new IllegalStateException(reason); + } + } + + public static void ensureTickThread(final ServerLevel world, final double blockX, final double blockZ, final String reason) { + if (!isTickThreadFor(world, blockX, blockZ)) { + MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); + throw new IllegalStateException(reason); + } + } + public final int id; /* We don't override getId as the spec requires that it be unique (with respect to all other threads) */ private static final AtomicInteger ID_GENERATOR = new AtomicInteger(); @@ -66,13 +110,45 @@ public final class TickThread extends Thread { } public static boolean isTickThread() { - return Bukkit.isPrimaryThread(); + return Thread.currentThread() instanceof TickThread; + } + + public static boolean isShutdownThread() { + return false; + } + + public static boolean isTickThreadFor(final ServerLevel world, final BlockPos pos) { + return isTickThread(); + } + + public static boolean isTickThreadFor(final ServerLevel world, final ChunkPos pos) { + return isTickThread(); + } + + public static boolean isTickThreadFor(final ServerLevel world, final Vec3 pos) { + return isTickThread(); } public static boolean isTickThreadFor(final ServerLevel world, final int chunkX, final int chunkZ) { return isTickThread(); } + public static boolean isTickThreadFor(final ServerLevel world, final AABB aabb) { + return isTickThread(); + } + + public static boolean isTickThreadFor(final ServerLevel world, final double blockX, final double blockZ) { + return isTickThread(); + } + + public static boolean isTickThreadFor(final ServerLevel world, final Vec3 position, final Vec3 deltaMovement, final int buffer) { + return isTickThread(); + } + + public static boolean isTickThreadFor(final ServerLevel world, final int fromChunkX, final int fromChunkZ, final int toChunkX, final int toChunkZ) { + return isTickThread(); + } + public static boolean isTickThreadFor(final ServerLevel world, final int chunkX, final int chunkZ, final int radius) { return isTickThread(); } diff --git a/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java b/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java new file mode 100644 index 0000000000000000000000000000000000000000..c78cbec447032de9fe69748591bef6be300160ed --- /dev/null +++ b/src/main/java/io/papermc/paper/world/ChunkEntitySlices.java @@ -0,0 +1,607 @@ +package io.papermc.paper.world; + +import com.destroystokyo.paper.util.maplist.EntityList; +import io.papermc.paper.chunk.system.entity.EntityLookup; +import io.papermc.paper.util.TickThread; +import it.unimi.dsi.fastutil.objects.Reference2ObjectMap; +import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap; +import net.minecraft.nbt.CompoundTag; +import net.minecraft.server.level.ChunkHolder; +import net.minecraft.server.level.FullChunkStatus; +import net.minecraft.server.level.ServerLevel; +import net.minecraft.util.Mth; +import net.minecraft.world.entity.Entity; +import net.minecraft.world.entity.EntityType; +import net.minecraft.world.entity.boss.EnderDragonPart; +import net.minecraft.world.entity.boss.enderdragon.EnderDragon; +import net.minecraft.world.level.ChunkPos; +import net.minecraft.world.level.chunk.storage.EntityStorage; +import net.minecraft.world.level.entity.Visibility; +import net.minecraft.world.phys.AABB; +import org.bukkit.craftbukkit.event.CraftEventFactory; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Iterator; +import java.util.List; +import java.util.function.Predicate; +import org.bukkit.event.entity.EntityRemoveEvent; + +public final class ChunkEntitySlices { + + protected final int minSection; + protected final int maxSection; + public final int chunkX; + public final int chunkZ; + protected final ServerLevel world; + + protected final EntityCollectionBySection allEntities; + protected final EntityCollectionBySection hardCollidingEntities; + protected final Reference2ObjectOpenHashMap, EntityCollectionBySection> entitiesByClass; + protected final EntityList entities = new EntityList(); + + public FullChunkStatus status; + + protected boolean isTransient; + + public boolean isTransient() { + return this.isTransient; + } + + public void setTransient(final boolean value) { + this.isTransient = value; + } + + // TODO implement container search optimisations + + public ChunkEntitySlices(final ServerLevel world, final int chunkX, final int chunkZ, final FullChunkStatus status, + final int minSection, final int maxSection) { // inclusive, inclusive + this.minSection = minSection; + this.maxSection = maxSection; + this.chunkX = chunkX; + this.chunkZ = chunkZ; + this.world = world; + + this.allEntities = new EntityCollectionBySection(this); + this.hardCollidingEntities = new EntityCollectionBySection(this); + this.entitiesByClass = new Reference2ObjectOpenHashMap<>(); + + this.status = status; + } + + // Paper start - optimise CraftChunk#getEntities + public org.bukkit.entity.Entity[] getChunkEntities() { + List ret = new java.util.ArrayList<>(); + final Entity[] entities = this.entities.getRawData(); + for (int i = 0, size = Math.min(entities.length, this.entities.size()); i < size; ++i) { + final Entity entity = entities[i]; + if (entity == null) { + continue; + } + final org.bukkit.entity.Entity bukkit = entity.getBukkitEntity(); + if (bukkit != null && bukkit.isValid()) { + ret.add(bukkit); + } + } + + return ret.toArray(new org.bukkit.entity.Entity[0]); + } + + public CompoundTag save() { + final int len = this.entities.size(); + if (len == 0) { + return null; + } + + final Entity[] rawData = this.entities.getRawData(); + final List collectedEntities = new ArrayList<>(len); + for (int i = 0; i < len; ++i) { + final Entity entity = rawData[i]; + if (entity.shouldBeSaved()) { + collectedEntities.add(entity); + } + } + + if (collectedEntities.isEmpty()) { + return null; + } + + return EntityStorage.saveEntityChunk(collectedEntities, new ChunkPos(this.chunkX, this.chunkZ), this.world); + } + + // returns true if this chunk has transient entities remaining + public boolean unload() { + final int len = this.entities.size(); + final Entity[] collectedEntities = Arrays.copyOf(this.entities.getRawData(), len); + + for (int i = 0; i < len; ++i) { + final Entity entity = collectedEntities[i]; + if (entity.isRemoved()) { + // removed by us below + continue; + } + if (entity.shouldBeSaved()) { + entity.setRemoved(Entity.RemovalReason.UNLOADED_TO_CHUNK, EntityRemoveEvent.Cause.UNLOAD); + if (entity.isVehicle()) { + // we cannot assume that these entities are contained within this chunk, because entities can + // desync - so we need to remove them all + for (final Entity passenger : entity.getIndirectPassengers()) { + passenger.setRemoved(Entity.RemovalReason.UNLOADED_TO_CHUNK, EntityRemoveEvent.Cause.UNLOAD); + } + } + } + } + + return this.entities.size() != 0; + } + + private List getAllEntities() { + final int len = this.entities.size(); + if (len == 0) { + return new ArrayList<>(); + } + + final Entity[] rawData = this.entities.getRawData(); + final List collectedEntities = new ArrayList<>(len); + for (int i = 0; i < len; ++i) { + collectedEntities.add(rawData[i]); + } + + return collectedEntities; + } + + public void callEntitiesLoadEvent() { + CraftEventFactory.callEntitiesLoadEvent(this.world, new ChunkPos(this.chunkX, this.chunkZ), this.getAllEntities()); + } + + public void callEntitiesUnloadEvent() { + CraftEventFactory.callEntitiesUnloadEvent(this.world, new ChunkPos(this.chunkX, this.chunkZ), this.getAllEntities()); + } + // Paper end - optimise CraftChunk#getEntities + + public boolean isEmpty() { + return this.entities.size() == 0; + } + + public void mergeInto(final ChunkEntitySlices slices) { + final Entity[] entities = this.entities.getRawData(); + for (int i = 0, size = Math.min(entities.length, this.entities.size()); i < size; ++i) { + final Entity entity = entities[i]; + slices.addEntity(entity, entity.sectionY); + } + } + + private boolean preventStatusUpdates; + public boolean startPreventingStatusUpdates() { + final boolean ret = this.preventStatusUpdates; + this.preventStatusUpdates = true; + return ret; + } + + public boolean isPreventingStatusUpdates() { + return this.preventStatusUpdates; + } + + public void stopPreventingStatusUpdates(final boolean prev) { + this.preventStatusUpdates = prev; + } + + public void updateStatus(final FullChunkStatus status, final EntityLookup lookup) { + this.status = status; + + final Entity[] entities = this.entities.getRawData(); + + for (int i = 0, size = this.entities.size(); i < size; ++i) { + final Entity entity = entities[i]; + + final Visibility oldVisibility = EntityLookup.getEntityStatus(entity); + entity.chunkStatus = status; + final Visibility newVisibility = EntityLookup.getEntityStatus(entity); + + lookup.entityStatusChange(entity, this, oldVisibility, newVisibility, false, false, false); + } + } + + public boolean addEntity(final Entity entity, final int chunkSection) { + if (!this.entities.add(entity)) { + return false; + } + entity.chunkStatus = this.status; + final int sectionIndex = chunkSection - this.minSection; + + this.allEntities.addEntity(entity, sectionIndex); + + if (entity.hardCollides()) { + this.hardCollidingEntities.addEntity(entity, sectionIndex); + } + + for (final Iterator, EntityCollectionBySection>> iterator = + this.entitiesByClass.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { + final Reference2ObjectMap.Entry, EntityCollectionBySection> entry = iterator.next(); + + if (entry.getKey().isInstance(entity)) { + entry.getValue().addEntity(entity, sectionIndex); + } + } + + return true; + } + + public boolean removeEntity(final Entity entity, final int chunkSection) { + if (!this.entities.remove(entity)) { + return false; + } + entity.chunkStatus = null; + final int sectionIndex = chunkSection - this.minSection; + + this.allEntities.removeEntity(entity, sectionIndex); + + if (entity.hardCollides()) { + this.hardCollidingEntities.removeEntity(entity, sectionIndex); + } + + for (final Iterator, EntityCollectionBySection>> iterator = + this.entitiesByClass.reference2ObjectEntrySet().fastIterator(); iterator.hasNext();) { + final Reference2ObjectMap.Entry, EntityCollectionBySection> entry = iterator.next(); + + if (entry.getKey().isInstance(entity)) { + entry.getValue().removeEntity(entity, sectionIndex); + } + } + + return true; + } + + public void getHardCollidingEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { + this.hardCollidingEntities.getEntities(except, box, into, predicate); + } + + public void getEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { + this.allEntities.getEntitiesWithEnderDragonParts(except, box, into, predicate); + } + + public void getEntitiesWithoutDragonParts(final Entity except, final AABB box, final List into, final Predicate predicate) { + this.allEntities.getEntities(except, box, into, predicate); + } + + public void getEntities(final EntityType type, final AABB box, final List into, + final Predicate predicate) { + this.allEntities.getEntities(type, box, (List)into, (Predicate)predicate); + } + + protected EntityCollectionBySection initClass(final Class clazz) { + final EntityCollectionBySection ret = new EntityCollectionBySection(this); + + for (int sectionIndex = 0; sectionIndex < this.allEntities.entitiesBySection.length; ++sectionIndex) { + final BasicEntityList sectionEntities = this.allEntities.entitiesBySection[sectionIndex]; + if (sectionEntities == null) { + continue; + } + + final Entity[] storage = sectionEntities.storage; + + for (int i = 0, len = Math.min(storage.length, sectionEntities.size()); i < len; ++i) { + final Entity entity = storage[i]; + + if (clazz.isInstance(entity)) { + ret.addEntity(entity, sectionIndex); + } + } + } + + return ret; + } + + public void getEntities(final Class clazz, final Entity except, final AABB box, final List into, + final Predicate predicate) { + EntityCollectionBySection collection = this.entitiesByClass.get(clazz); + if (collection != null) { + collection.getEntitiesWithEnderDragonParts(except, clazz, box, (List)into, (Predicate)predicate); + } else { + this.entitiesByClass.putIfAbsent(clazz, collection = this.initClass(clazz)); + collection.getEntitiesWithEnderDragonParts(except, clazz, box, (List)into, (Predicate)predicate); + } + } + + protected static final class BasicEntityList { + + protected static final Entity[] EMPTY = new Entity[0]; + protected static final int DEFAULT_CAPACITY = 4; + + protected E[] storage; + protected int size; + + public BasicEntityList() { + this(0); + } + + public BasicEntityList(final int cap) { + this.storage = (E[])(cap <= 0 ? EMPTY : new Entity[cap]); + } + + public boolean isEmpty() { + return this.size == 0; + } + + public int size() { + return this.size; + } + + private void resize() { + if (this.storage == EMPTY) { + this.storage = (E[])new Entity[DEFAULT_CAPACITY]; + } else { + this.storage = Arrays.copyOf(this.storage, this.storage.length * 2); + } + } + + public void add(final E entity) { + final int idx = this.size++; + if (idx >= this.storage.length) { + this.resize(); + this.storage[idx] = entity; + } else { + this.storage[idx] = entity; + } + } + + public int indexOf(final E entity) { + final E[] storage = this.storage; + + for (int i = 0, len = Math.min(this.storage.length, this.size); i < len; ++i) { + if (storage[i] == entity) { + return i; + } + } + + return -1; + } + + public boolean remove(final E entity) { + final int idx = this.indexOf(entity); + if (idx == -1) { + return false; + } + + final int size = --this.size; + final E[] storage = this.storage; + if (idx != size) { + System.arraycopy(storage, idx + 1, storage, idx, size - idx); + } + + storage[size] = null; + + return true; + } + + public boolean has(final E entity) { + return this.indexOf(entity) != -1; + } + } + + protected static final class EntityCollectionBySection { + + protected final ChunkEntitySlices manager; + protected final long[] nonEmptyBitset; + protected final BasicEntityList[] entitiesBySection; + protected int count; + + public EntityCollectionBySection(final ChunkEntitySlices manager) { + this.manager = manager; + + final int sectionCount = manager.maxSection - manager.minSection + 1; + + this.nonEmptyBitset = new long[(sectionCount + (Long.SIZE - 1)) >>> 6]; // (sectionCount + (Long.SIZE - 1)) / Long.SIZE + this.entitiesBySection = new BasicEntityList[sectionCount]; + } + + public void addEntity(final Entity entity, final int sectionIndex) { + BasicEntityList list = this.entitiesBySection[sectionIndex]; + + if (list != null && list.has(entity)) { + return; + } + + if (list == null) { + this.entitiesBySection[sectionIndex] = list = new BasicEntityList<>(); + this.nonEmptyBitset[sectionIndex >>> 6] |= (1L << (sectionIndex & (Long.SIZE - 1))); + } + + list.add(entity); + ++this.count; + } + + public void removeEntity(final Entity entity, final int sectionIndex) { + final BasicEntityList list = this.entitiesBySection[sectionIndex]; + + if (list == null || !list.remove(entity)) { + return; + } + + --this.count; + + if (list.isEmpty()) { + this.entitiesBySection[sectionIndex] = null; + this.nonEmptyBitset[sectionIndex >>> 6] ^= (1L << (sectionIndex & (Long.SIZE - 1))); + } + } + + public void getEntities(final Entity except, final AABB box, final List into, final Predicate predicate) { + if (this.count == 0) { + return; + } + + final int minSection = this.manager.minSection; + final int maxSection = this.manager.maxSection; + + final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); + final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); + + final BasicEntityList[] entitiesBySection = this.entitiesBySection; + + for (int section = min; section <= max; ++section) { + final BasicEntityList list = entitiesBySection[section - minSection]; + + if (list == null) { + continue; + } + + final Entity[] storage = list.storage; + + for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { + final Entity entity = storage[i]; + + if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) { + continue; + } + + if (predicate != null && !predicate.test(entity)) { + continue; + } + + into.add(entity); + } + } + } + + public void getEntitiesWithEnderDragonParts(final Entity except, final AABB box, final List into, + final Predicate predicate) { + if (this.count == 0) { + return; + } + + final int minSection = this.manager.minSection; + final int maxSection = this.manager.maxSection; + + final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); + final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); + + final BasicEntityList[] entitiesBySection = this.entitiesBySection; + + for (int section = min; section <= max; ++section) { + final BasicEntityList list = entitiesBySection[section - minSection]; + + if (list == null) { + continue; + } + + final Entity[] storage = list.storage; + + for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { + final Entity entity = storage[i]; + + if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) { + continue; + } + + if (predicate == null || predicate.test(entity)) { + into.add(entity); + } // else: continue to test the ender dragon parts + + if (entity instanceof EnderDragon) { + for (final EnderDragonPart part : ((EnderDragon)entity).subEntities) { + if (part == except || !part.getBoundingBox().intersects(box)) { + continue; + } + + if (predicate != null && !predicate.test(part)) { + continue; + } + + into.add(part); + } + } + } + } + } + + public void getEntitiesWithEnderDragonParts(final Entity except, final Class clazz, final AABB box, final List into, + final Predicate predicate) { + if (this.count == 0) { + return; + } + + final int minSection = this.manager.minSection; + final int maxSection = this.manager.maxSection; + + final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); + final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); + + final BasicEntityList[] entitiesBySection = this.entitiesBySection; + + for (int section = min; section <= max; ++section) { + final BasicEntityList list = entitiesBySection[section - minSection]; + + if (list == null) { + continue; + } + + final Entity[] storage = list.storage; + + for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { + final Entity entity = storage[i]; + + if (entity == null || entity == except || !entity.getBoundingBox().intersects(box)) { + continue; + } + + if (predicate == null || predicate.test(entity)) { + into.add(entity); + } // else: continue to test the ender dragon parts + + if (entity instanceof EnderDragon) { + for (final EnderDragonPart part : ((EnderDragon)entity).subEntities) { + if (part == except || !part.getBoundingBox().intersects(box) || !clazz.isInstance(part)) { + continue; + } + + if (predicate != null && !predicate.test(part)) { + continue; + } + + into.add(part); + } + } + } + } + } + + public void getEntities(final EntityType type, final AABB box, final List into, + final Predicate predicate) { + if (this.count == 0) { + return; + } + + final int minSection = this.manager.minSection; + final int maxSection = this.manager.maxSection; + + final int min = Mth.clamp(Mth.floor(box.minY - 2.0) >> 4, minSection, maxSection); + final int max = Mth.clamp(Mth.floor(box.maxY + 2.0) >> 4, minSection, maxSection); + + final BasicEntityList[] entitiesBySection = this.entitiesBySection; + + for (int section = min; section <= max; ++section) { + final BasicEntityList list = entitiesBySection[section - minSection]; + + if (list == null) { + continue; + } + + final Entity[] storage = list.storage; + + for (int i = 0, len = Math.min(storage.length, list.size()); i < len; ++i) { + final Entity entity = storage[i]; + + if (entity == null || (type != null && entity.getType() != type) || !entity.getBoundingBox().intersects(box)) { + continue; + } + + if (predicate != null && !predicate.test((T)entity)) { + continue; + } + + into.add((T)entity); + } + } + } + } +} diff --git a/src/main/java/net/minecraft/server/Main.java b/src/main/java/net/minecraft/server/Main.java index c33f85b570f159ab465b5a10a8044a81f2797f43..244a19ecd0234fa1d7a6ecfea20751595688605d 100644 --- a/src/main/java/net/minecraft/server/Main.java +++ b/src/main/java/net/minecraft/server/Main.java @@ -320,6 +320,7 @@ public class Main { convertable_conversionsession.saveDataTag(iregistrycustom_dimension, savedata); */ + Class.forName(net.minecraft.world.entity.npc.VillagerTrades.class.getName()); // Paper - load this sync so it won't fail later async final DedicatedServer dedicatedserver = (DedicatedServer) MinecraftServer.spin((thread) -> { DedicatedServer dedicatedserver1 = new DedicatedServer(optionset, worldLoader.get(), thread, convertable_conversionsession, resourcepackrepository, worldstem, dedicatedserversettings, DataFixers.getDataFixer(), services, LoggerChunkProgressListener::createFromGameruleRadius); diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java index 325ba58a1c79fd928ac22d8f1ef93605357300d2..498fc4ab46eac994f2a65c79eebddca2813f0b65 100644 --- a/src/main/java/net/minecraft/server/MinecraftServer.java +++ b/src/main/java/net/minecraft/server/MinecraftServer.java @@ -318,7 +318,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop S spin(Function serverFactory) { AtomicReference atomicreference = new AtomicReference(); - Thread thread = new Thread(() -> { + Thread thread = new io.papermc.paper.util.TickThread(() -> { // Paper - rewrite chunk system ((MinecraftServer) atomicreference.get()).runServer(); }, "Server thread"); @@ -654,7 +654,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop { - return worldserver1.getChunkSource().chunkMap.hasWork(); - })) { - this.nextTickTimeNanos = Util.getNanos() + TimeUtil.NANOSECONDS_PER_MILLISECOND; - iterator = this.getAllLevels().iterator(); - - while (iterator.hasNext()) { - worldserver = (ServerLevel) iterator.next(); - worldserver.getChunkSource().removeTicketsOnClosing(); - worldserver.getChunkSource().tick(() -> { - return true; - }, false); - } - - this.waitUntilNextTick(); - } - - this.saveAllChunks(false, true, false); - iterator = this.getAllLevels().iterator(); - - while (iterator.hasNext()) { - worldserver = (ServerLevel) iterator.next(); - if (worldserver != null) { - try { - worldserver.close(); - } catch (IOException ioexception) { - MinecraftServer.LOGGER.error("Exception closing the level", ioexception); - } - } - } + this.saveAllChunks(false, true, false, true); // Paper - rewrite chunk system - move closing into here this.isSaving = false; this.resources.close(); @@ -1023,6 +1004,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop { - for (final Entity entity : level.getEntities().getAll()) { + for (final Entity entity : level.getEntityLookup().getAllCopy()) { // Paper - rewrite chunk system if (entity.isRemoved()) { continue; } @@ -2625,6 +2620,13 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop { + LOGGER.info("Async debug chunks executing"); + io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(false); + CommandSender sender = MinecraftServer.getServer().console; + java.io.File file = new java.io.File(new java.io.File(new java.io.File("."), "debug"), + "chunks-" + java.time.format.DateTimeFormatter.ofPattern("yyyy-MM-dd_HH.mm.ss").format(java.time.LocalDateTime.now()) + ".txt"); + sender.sendMessage(net.kyori.adventure.text.Component.text("Writing chunk information dump to " + file, net.kyori.adventure.text.format.NamedTextColor.GREEN)); + try { + io.papermc.paper.util.MCUtil.dumpChunks(file, true); + sender.sendMessage(net.kyori.adventure.text.Component.text("Successfully written chunk information!", net.kyori.adventure.text.format.NamedTextColor.GREEN)); + } catch (Throwable thr) { + MinecraftServer.LOGGER.warn("Failed to dump chunk information to file " + file.toString(), thr); + sender.sendMessage(net.kyori.adventure.text.Component.text("Failed to dump chunk information, see console", net.kyori.adventure.text.format.NamedTextColor.RED)); + } + }; + Thread t = new Thread(run); + t.setName("Async debug thread #" + ASYNC_DEBUG_CHUNKS_COUNT.getAndIncrement()); + t.setDaemon(true); + t.start(); + return; + } + // Paper end - rewrite chunk system this.serverCommandQueue.add(new ConsoleInput(command, commandSource)); // Paper - Perf: use proper queue } diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java index 88729d92878f98729eb5669cce5ae5b1418865a1..13d15a135dd0373bef4a5ac9ffb56dbbf53353a0 100644 --- a/src/main/java/net/minecraft/server/level/ChunkHolder.java +++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java @@ -46,17 +46,12 @@ public class ChunkHolder { public static final ChunkResult NOT_DONE_YET = ChunkResult.error("Not done yet"); private static final CompletableFuture> UNLOADED_LEVEL_CHUNK_FUTURE = CompletableFuture.completedFuture(ChunkHolder.UNLOADED_LEVEL_CHUNK); private static final List CHUNK_STATUSES = ChunkStatus.getStatusList(); - private final AtomicReferenceArray>> futures; + // Paper - rewrite chunk system private final LevelHeightAccessor levelHeightAccessor; - private volatile CompletableFuture> fullChunkFuture; private int fullChunkCreateCount; private volatile boolean isFullChunkReady; // Paper - cache chunk ticking stage - private volatile CompletableFuture> tickingChunkFuture; private volatile boolean isTickingReady; // Paper - cache chunk ticking stage - private volatile CompletableFuture> entityTickingChunkFuture; private volatile boolean isEntityTickingReady; // Paper - cache chunk ticking stage - public CompletableFuture chunkToSave; // Paper - public + // Paper - rewrite chunk system @Nullable private final DebugBuffer chunkToSaveHistory; - public int oldTicketLevel; - private int ticketLevel; - private int queueLevel; + // Paper - rewrite chunk system public final ChunkPos pos; private boolean hasChangedSections; private final ShortSet[] changedBlocksPerSection; @@ -65,11 +60,20 @@ public class ChunkHolder { private final LevelLightEngine lightEngine; private final ChunkHolder.LevelChangeListener onLevelChange; public final ChunkHolder.PlayerProvider playerProvider; - private boolean wasAccessibleSinceLastSave; - private CompletableFuture pendingFullStateConfirmation; - private CompletableFuture sendSync; + // Paper - rewrite chunk system private final ChunkMap chunkMap; // Paper + // Paper start - no-tick view distance + public final LevelChunk getSendingChunk() { + // it's important that we use getChunkAtIfLoadedImmediately to mirror the chunk sending logic used + // in Chunk's neighbour callback + LevelChunk ret = this.chunkMap.level.getChunkSource().getChunkAtIfLoadedImmediately(this.pos.x, this.pos.z); + if (ret != null && ret.areNeighboursLoaded(1)) { + return ret; + } + return null; + } + // Paper end - no-tick view distance // Paper start public void onChunkAdd() { @@ -81,147 +85,131 @@ public class ChunkHolder { } // Paper end - public ChunkHolder(ChunkPos pos, int level, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.LevelChangeListener levelUpdateListener, ChunkHolder.PlayerProvider playersWatchingChunkProvider) { - this.futures = new AtomicReferenceArray(ChunkHolder.CHUNK_STATUSES.size()); - this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; - this.tickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; - this.entityTickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; - this.chunkToSave = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error + public final io.papermc.paper.chunk.system.scheduling.NewChunkHolder newChunkHolder; // Paper - rewrite chunk system + + // Paper start - replace player chunk loader + private final com.destroystokyo.paper.util.maplist.ReferenceList playersSentChunkTo = new com.destroystokyo.paper.util.maplist.ReferenceList<>(); + + public void addPlayer(ServerPlayer player) { + if (!this.playersSentChunkTo.add(player)) { + throw new IllegalStateException("Already sent chunk " + this.pos + " in world '" + this.chunkMap.level.getWorld().getName() + "' to player " + player); + } + } + + public void removePlayer(ServerPlayer player) { + if (!this.playersSentChunkTo.remove(player)) { + throw new IllegalStateException("Have not sent chunk " + this.pos + " in world '" + this.chunkMap.level.getWorld().getName() + "' to player " + player); + } + } + + public boolean hasChunkBeenSent() { + return this.playersSentChunkTo.size() != 0; + } + + public boolean hasBeenSent(ServerPlayer to) { + return this.playersSentChunkTo.contains(to); + } + // Paper end - replace player chunk loader + public ChunkHolder(ChunkPos pos, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.PlayerProvider playersWatchingChunkProvider, io.papermc.paper.chunk.system.scheduling.NewChunkHolder newChunkHolder) { // Paper - rewrite chunk system + this.newChunkHolder = newChunkHolder; // Paper - rewrite chunk system this.chunkToSaveHistory = null; this.blockChangedLightSectionFilter = new BitSet(); this.skyChangedLightSectionFilter = new BitSet(); - this.pendingFullStateConfirmation = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error - this.sendSync = CompletableFuture.completedFuture(null); // CraftBukkit - decompile error + // Paper - rewrite chunk system this.pos = pos; this.levelHeightAccessor = world; this.lightEngine = lightingProvider; - this.onLevelChange = levelUpdateListener; + this.onLevelChange = null; // Paper - rewrite chunk system this.playerProvider = playersWatchingChunkProvider; - this.oldTicketLevel = ChunkLevel.MAX_LEVEL + 1; - this.ticketLevel = this.oldTicketLevel; - this.queueLevel = this.oldTicketLevel; - this.setTicketLevel(level); + // Paper - rewrite chunk system this.changedBlocksPerSection = new ShortSet[world.getSectionsCount()]; this.chunkMap = (ChunkMap)playersWatchingChunkProvider; // Paper } // Paper start public @Nullable ChunkAccess getAvailableChunkNow() { - // TODO can we just getStatusFuture(EMPTY)? - for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getParent(); curr != next; curr = next, next = next.getParent()) { - CompletableFuture> future = this.getFutureIfPresentUnchecked(curr); - ChunkResult either = future.getNow(null); - if (either == null || either.isSuccess()) { - continue; - } - return either.orElseThrow(IllegalStateException::new); - } - return null; + return this.newChunkHolder.getCurrentChunk(); // Paper - rewrite chunk system } // Paper end // CraftBukkit start public LevelChunk getFullChunkNow() { - // Note: We use the oldTicketLevel for isLoaded checks. - if (!ChunkLevel.fullStatus(this.oldTicketLevel).isOrAfter(FullChunkStatus.FULL)) return null; - return this.getFullChunkNowUnchecked(); + // Paper start - rewrite chunk system + if (!this.isFullChunkReady() || !(this.getAvailableChunkNow() instanceof LevelChunk chunk)) return null; // instanceof to avoid a race condition on off-main threads + return chunk; + // Paper end - rewrite chunk system } public LevelChunk getFullChunkNowUnchecked() { - CompletableFuture> statusFuture = this.getFutureIfPresentUnchecked(ChunkStatus.FULL); - ChunkResult either = statusFuture.getNow(null); - return (either == null) ? null : (LevelChunk) either.orElse(null); + // Paper start - rewrite chunk system + return this.getAvailableChunkNow() instanceof LevelChunk chunk ? chunk : null; + // Paper end - rewrite chunk system } // CraftBukkit end public CompletableFuture> getFutureIfPresentUnchecked(ChunkStatus leastStatus) { - CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(leastStatus.getIndex()); - - return completablefuture == null ? ChunkHolder.UNLOADED_CHUNK_FUTURE : completablefuture; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public CompletableFuture> getFutureIfPresent(ChunkStatus leastStatus) { - return ChunkLevel.generationStatus(this.ticketLevel).isOrAfter(leastStatus) ? this.getFutureIfPresentUnchecked(leastStatus) : ChunkHolder.UNLOADED_CHUNK_FUTURE; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public final CompletableFuture> getTickingChunkFuture() { // Paper - final for inline - return this.tickingChunkFuture; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public final CompletableFuture> getEntityTickingChunkFuture() { // Paper - final for inline - return this.entityTickingChunkFuture; + throw new UnsupportedOperationException(); // Paper - rewrite chunk systemv } public final CompletableFuture> getFullChunkFuture() { // Paper - final for inline - return this.fullChunkFuture; + throw new UnsupportedOperationException(); // Paper - rewrite chunk systemv } @Nullable public final LevelChunk getTickingChunk() { // Paper - final for inline - return (LevelChunk) ((ChunkResult) this.getTickingChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).orElse(null); // CraftBukkit - decompile error + // Paper start - rewrite chunk system + if (!this.isTickingReady()) { + return null; + } + return (LevelChunk)this.getAvailableChunkNow(); + // Paper end - rewrite chunk system } public CompletableFuture getChunkSendSyncFuture() { - return this.sendSync; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @Nullable public LevelChunk getChunkToSend() { - return !this.sendSync.isDone() ? null : this.getTickingChunk(); + return this.getSendingChunk(); // Paper - rewrite chunk system } @Nullable public ChunkStatus getLastAvailableStatus() { - for (int i = ChunkHolder.CHUNK_STATUSES.size() - 1; i >= 0; --i) { - ChunkStatus chunkstatus = (ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i); - CompletableFuture> completablefuture = this.getFutureIfPresentUnchecked(chunkstatus); - - if (((ChunkResult) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).isSuccess()) { - return chunkstatus; - } - } - - return null; + return this.newChunkHolder.getCurrentGenStatus(); // Paper - rewrite chunk system } // Paper start public @Nullable ChunkStatus getChunkHolderStatus() { - for (ChunkStatus curr = ChunkStatus.FULL, next = curr.getParent(); curr != next; curr = next, next = next.getParent()) { - CompletableFuture> future = this.getFutureIfPresentUnchecked(curr); - ChunkResult either = future.getNow(null); - if (either == null || !either.isSuccess()) { - continue; - } - return curr; - } - - return null; + return this.newChunkHolder.getCurrentGenStatus(); // Paper - rewrite chunk system } // Paper end @Nullable public ChunkAccess getLastAvailable() { - for (int i = ChunkHolder.CHUNK_STATUSES.size() - 1; i >= 0; --i) { - ChunkStatus chunkstatus = (ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i); - CompletableFuture> completablefuture = this.getFutureIfPresentUnchecked(chunkstatus); - - if (!completablefuture.isCompletedExceptionally()) { - ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); - - if (ichunkaccess != null) { - return ichunkaccess; - } - } - } - - return null; + return this.newChunkHolder.getCurrentChunk(); // Paper - rewrite chunk system } - public final CompletableFuture getChunkToSave() { // Paper - final for inline - return this.chunkToSave; - } + // Paper - rewrite chunk system public void blockChanged(BlockPos pos) { - LevelChunk chunk = this.getTickingChunk(); + // Paper start - replace player chunk loader + if (this.playersSentChunkTo.size() == 0) { + return; + } + // Paper end - replace player chunk loader + LevelChunk chunk = this.getSendingChunk(); // Paper - no-tick view distance if (chunk != null) { int i = this.levelHeightAccessor.getSectionIndex(pos.getY()); @@ -237,13 +225,13 @@ public class ChunkHolder { } public void sectionLightChanged(LightLayer lightType, int y) { - ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) this.getFutureIfPresent(ChunkStatus.INITIALIZE_LIGHT).getNow(ChunkHolder.UNLOADED_CHUNK)).orElse(null); // CraftBukkit - decompile error + ChunkAccess ichunkaccess = this.getAvailableChunkNow(); // Paper - rewrite chunk system if (ichunkaccess != null) { ichunkaccess.setUnsaved(true); - LevelChunk chunk = this.getTickingChunk(); + LevelChunk chunk = this.getSendingChunk(); // Paper - rewrite chunk system - if (chunk != null) { + if (this.playersSentChunkTo.size() != 0 && chunk != null) { // Paper - replace player chunk loader int j = this.lightEngine.getMinLightSection(); int k = this.lightEngine.getMaxLightSection(); @@ -263,7 +251,7 @@ public class ChunkHolder { // Paper start - starlight public void broadcast(Packet packet, boolean onChunkViewEdge) { - this.broadcast(this.playerProvider.getPlayers(this.pos, onChunkViewEdge), packet); + this.broadcast(this.getPlayers(onChunkViewEdge), packet); // Paper - rewrite chunk system } // Paper end - starlight @@ -273,7 +261,7 @@ public class ChunkHolder { List list; if (!this.skyChangedLightSectionFilter.isEmpty() || !this.blockChangedLightSectionFilter.isEmpty()) { - list = this.playerProvider.getPlayers(this.pos, true); + list = this.getPlayers(true); // Paper - rewrite chunk system if (!list.isEmpty()) { ClientboundLightUpdatePacket packetplayoutlightupdate = new ClientboundLightUpdatePacket(chunk.getPos(), this.lightEngine, this.skyChangedLightSectionFilter, this.blockChangedLightSectionFilter); @@ -285,7 +273,7 @@ public class ChunkHolder { } if (this.hasChangedSections) { - list = this.playerProvider.getPlayers(this.pos, false); + list = this.getPlayers(false); // Paper - rewrite chunk system for (int i = 0; i < this.changedBlocksPerSection.length; ++i) { ShortSet shortset = this.changedBlocksPerSection[i]; @@ -343,75 +331,33 @@ public class ChunkHolder { } - private void broadcast(List players, Packet packet) { - players.forEach((entityplayer) -> { - entityplayer.connection.send(packet); - }); - } - - public CompletableFuture> getOrScheduleFuture(ChunkStatus targetStatus, ChunkMap chunkStorage) { - int i = targetStatus.getIndex(); - CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(i); + // Paper start - rewrite chunk system + public List getPlayers(boolean onlyOnWatchDistanceEdge) { + List ret = new java.util.ArrayList<>(); - if (completablefuture != null) { - ChunkResult chunkresult = (ChunkResult) completablefuture.getNow(ChunkHolder.NOT_DONE_YET); - - if (chunkresult == null) { - String s = String.valueOf(targetStatus); - String s1 = "value in future for status: " + s + " was incorrectly set to null at chunk: " + String.valueOf(this.pos); - - throw chunkStorage.debugFuturesAndCreateReportedException(new IllegalStateException("null value previously set for chunk status"), s1); - } - - if (chunkresult == ChunkHolder.NOT_DONE_YET || chunkresult.isSuccess()) { - return completablefuture; + for (int i = 0, len = this.playersSentChunkTo.size(); i < len; ++i) { + ServerPlayer player = this.playersSentChunkTo.getUnchecked(i); + if (onlyOnWatchDistanceEdge && !this.chunkMap.level.playerChunkLoader.isChunkSent(player, this.pos.x, this.pos.z, onlyOnWatchDistanceEdge)) { + continue; } + ret.add(player); } - if (ChunkLevel.generationStatus(this.ticketLevel).isOrAfter(targetStatus)) { - CompletableFuture> completablefuture1 = chunkStorage.schedule(this, targetStatus); - - this.updateChunkToSave(completablefuture1, "schedule " + String.valueOf(targetStatus)); - this.futures.set(i, completablefuture1); - return completablefuture1; - } else { - return completablefuture == null ? ChunkHolder.UNLOADED_CHUNK_FUTURE : completablefuture; - } + return ret; } + // Paper end - rewrite chunk system - protected void addSaveDependency(String thenDesc, CompletableFuture then) { - if (this.chunkToSaveHistory != null) { - this.chunkToSaveHistory.push(new ChunkHolder.ChunkSaveDebug(Thread.currentThread(), then, thenDesc)); - } - this.chunkToSave = this.chunkToSave.thenCombine(then, (ichunkaccess, object) -> { - return ichunkaccess; - }); - } - - private void updateChunkToSave(CompletableFuture> then, String thenDesc) { - if (this.chunkToSaveHistory != null) { - this.chunkToSaveHistory.push(new ChunkHolder.ChunkSaveDebug(Thread.currentThread(), then, thenDesc)); - } - - this.chunkToSave = this.chunkToSave.thenCombine(then, (ichunkaccess, chunkresult) -> { - return (ChunkAccess) ChunkResult.orElse(chunkresult, ichunkaccess); + private void broadcast(List players, Packet packet) { + players.forEach((entityplayer) -> { + entityplayer.connection.send(packet); }); } - public void addSendDependency(CompletableFuture postProcessingFuture) { - if (this.sendSync.isDone()) { - this.sendSync = postProcessingFuture; - } else { - this.sendSync = this.sendSync.thenCombine(postProcessingFuture, (object, object1) -> { - return null; - }); - } - - } + // Paper - rewrite chunk system public FullChunkStatus getFullStatus() { - return ChunkLevel.fullStatus(this.ticketLevel); + return this.newChunkHolder.getChunkStatus(); // Paper - rewrite chunk system } public final ChunkPos getPos() { // Paper - final for inline @@ -419,238 +365,17 @@ public class ChunkHolder { } public final int getTicketLevel() { // Paper - final for inline - return this.ticketLevel; - } - - public int getQueueLevel() { - return this.queueLevel; - } - - private void setQueueLevel(int level) { - this.queueLevel = level; - } - - public void setTicketLevel(int level) { - this.ticketLevel = level; - } - - private void scheduleFullChunkPromotion(ChunkMap playerchunkmap, CompletableFuture> completablefuture, Executor executor, FullChunkStatus fullchunkstatus) { - this.pendingFullStateConfirmation.cancel(false); - CompletableFuture completablefuture1 = new CompletableFuture(); - - completablefuture1.thenRunAsync(() -> { - playerchunkmap.onFullChunkStatusChange(this.pos, fullchunkstatus); - }, executor); - this.pendingFullStateConfirmation = completablefuture1; - completablefuture.thenAccept((chunkresult) -> { - chunkresult.ifSuccess((chunk) -> { - completablefuture1.complete(null); // CraftBukkit - decompile error - }); - }); - } - - private void demoteFullChunk(ChunkMap playerchunkmap, FullChunkStatus fullchunkstatus) { - this.pendingFullStateConfirmation.cancel(false); - playerchunkmap.onFullChunkStatusChange(this.pos, fullchunkstatus); - } - - protected void updateFutures(ChunkMap chunkStorage, Executor executor) { - ChunkStatus chunkstatus = ChunkLevel.generationStatus(this.oldTicketLevel); - ChunkStatus chunkstatus1 = ChunkLevel.generationStatus(this.ticketLevel); - boolean flag = ChunkLevel.isLoaded(this.oldTicketLevel); - boolean flag1 = ChunkLevel.isLoaded(this.ticketLevel); - FullChunkStatus fullchunkstatus = ChunkLevel.fullStatus(this.oldTicketLevel); - FullChunkStatus fullchunkstatus1 = ChunkLevel.fullStatus(this.ticketLevel); - // CraftBukkit start - // ChunkUnloadEvent: Called before the chunk is unloaded: isChunkLoaded is still true and chunk can still be modified by plugins. - if (fullchunkstatus.isOrAfter(FullChunkStatus.FULL) && !fullchunkstatus1.isOrAfter(FullChunkStatus.FULL)) { - this.getFutureIfPresentUnchecked(ChunkStatus.FULL).thenAccept((either) -> { - LevelChunk chunk = (LevelChunk) either.orElse(null); - if (chunk != null) { - chunkStorage.callbackExecutor.execute(() -> { - // Minecraft will apply the chunks tick lists to the world once the chunk got loaded, and then store the tick - // lists again inside the chunk once the chunk becomes inaccessible and set the chunk's needsSaving flag. - // These actions may however happen deferred, so we manually set the needsSaving flag already here. - chunk.setUnsaved(true); - chunk.unloadCallback(); - }); - } - }).exceptionally((throwable) -> { - // ensure exceptions are printed, by default this is not the case - MinecraftServer.LOGGER.error("Failed to schedule unload callback for chunk " + ChunkHolder.this.pos, throwable); - return null; - }); - - // Run callback right away if the future was already done - chunkStorage.callbackExecutor.run(); - } - // CraftBukkit end - - if (flag) { - ChunkResult chunkresult = ChunkResult.error(() -> { - return "Unloaded ticket level " + String.valueOf(this.pos); - }); - - for (int i = flag1 ? chunkstatus1.getIndex() + 1 : 0; i <= chunkstatus.getIndex(); ++i) { - CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(i); - - if (completablefuture == null) { - this.futures.set(i, CompletableFuture.completedFuture(chunkresult)); - } - } - } - - boolean flag2 = fullchunkstatus.isOrAfter(FullChunkStatus.FULL); - boolean flag3 = fullchunkstatus1.isOrAfter(FullChunkStatus.FULL); - - this.wasAccessibleSinceLastSave |= flag3; - if (!flag2 && flag3) { - int expectCreateCount = ++this.fullChunkCreateCount; // Paper - this.fullChunkFuture = chunkStorage.prepareAccessibleChunk(this); - this.scheduleFullChunkPromotion(chunkStorage, this.fullChunkFuture, executor, FullChunkStatus.FULL); - // Paper start - cache ticking ready status - this.fullChunkFuture.thenAccept(chunkResult -> { - chunkResult.ifSuccess(chunk -> { - if (ChunkHolder.this.fullChunkCreateCount == expectCreateCount) { - ChunkHolder.this.isFullChunkReady = true; - io.papermc.paper.chunk.system.ChunkSystem.onChunkBorder(chunk, this); - } - }); - }); - this.updateChunkToSave(this.fullChunkFuture, "full"); - } - - if (flag2 && !flag3) { - // Paper start - if (this.isFullChunkReady) { - io.papermc.paper.chunk.system.ChunkSystem.onChunkNotBorder(this.fullChunkFuture.join().orElseThrow(IllegalStateException::new), this); // Paper - } - // Paper end - this.fullChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); - this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; - ++this.fullChunkCreateCount; // Paper - cache ticking ready status - this.isFullChunkReady = false; // Paper - cache ticking ready status - } - - boolean flag4 = fullchunkstatus.isOrAfter(FullChunkStatus.BLOCK_TICKING); - boolean flag5 = fullchunkstatus1.isOrAfter(FullChunkStatus.BLOCK_TICKING); - - if (!flag4 && flag5) { - this.tickingChunkFuture = chunkStorage.prepareTickingChunk(this); - this.scheduleFullChunkPromotion(chunkStorage, this.tickingChunkFuture, executor, FullChunkStatus.BLOCK_TICKING); - // Paper start - cache ticking ready status - this.tickingChunkFuture.thenAccept(chunkResult -> { - chunkResult.ifSuccess(chunk -> { - // note: Here is a very good place to add callbacks to logic waiting on this. - ChunkHolder.this.isTickingReady = true; - io.papermc.paper.chunk.system.ChunkSystem.onChunkTicking(chunk, this); - }); - }); - // Paper end - this.updateChunkToSave(this.tickingChunkFuture, "ticking"); - } - - if (flag4 && !flag5) { - // Paper start - if (this.isTickingReady) { - io.papermc.paper.chunk.system.ChunkSystem.onChunkNotTicking(this.tickingChunkFuture.join().orElseThrow(IllegalStateException::new), this); // Paper - } - // Paper end - this.tickingChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); this.isTickingReady = false; // Paper - cache chunk ticking stage - this.tickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; - } - - boolean flag6 = fullchunkstatus.isOrAfter(FullChunkStatus.ENTITY_TICKING); - boolean flag7 = fullchunkstatus1.isOrAfter(FullChunkStatus.ENTITY_TICKING); - - if (!flag6 && flag7) { - if (this.entityTickingChunkFuture != ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE) { - throw (IllegalStateException) Util.pauseInIde(new IllegalStateException()); - } - - this.entityTickingChunkFuture = chunkStorage.prepareEntityTickingChunk(this); - this.scheduleFullChunkPromotion(chunkStorage, this.entityTickingChunkFuture, executor, FullChunkStatus.ENTITY_TICKING); - // Paper start - cache ticking ready status - this.entityTickingChunkFuture.thenAccept(chunkResult -> { - chunkResult.ifSuccess(chunk -> { - ChunkHolder.this.isEntityTickingReady = true; - io.papermc.paper.chunk.system.ChunkSystem.onChunkEntityTicking(chunk, this); - }); - }); - // Paper end - this.updateChunkToSave(this.entityTickingChunkFuture, "entity ticking"); - } - - if (flag6 && !flag7) { - // Paper start - if (this.isEntityTickingReady) { - io.papermc.paper.chunk.system.ChunkSystem.onChunkNotEntityTicking(this.entityTickingChunkFuture.join().orElseThrow(IllegalStateException::new), this); - } - // Paper end - this.entityTickingChunkFuture.complete(ChunkHolder.UNLOADED_LEVEL_CHUNK); this.isEntityTickingReady = false; // Paper - cache chunk ticking stage - this.entityTickingChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE; - } - - if (!fullchunkstatus1.isOrAfter(fullchunkstatus)) { - this.demoteFullChunk(chunkStorage, fullchunkstatus1); - } - - this.onLevelChange.onLevelChange(this.pos, this::getQueueLevel, this.ticketLevel, this::setQueueLevel); - this.oldTicketLevel = this.ticketLevel; - // CraftBukkit start - // ChunkLoadEvent: Called after the chunk is loaded: isChunkLoaded returns true and chunk is ready to be modified by plugins. - if (!fullchunkstatus.isOrAfter(FullChunkStatus.FULL) && fullchunkstatus1.isOrAfter(FullChunkStatus.FULL)) { - this.getFutureIfPresentUnchecked(ChunkStatus.FULL).thenAccept((either) -> { - LevelChunk chunk = (LevelChunk) either.orElse(null); - if (chunk != null) { - chunkStorage.callbackExecutor.execute(() -> { - chunk.loadCallback(); - }); - } - }).exceptionally((throwable) -> { - // ensure exceptions are printed, by default this is not the case - MinecraftServer.LOGGER.error("Failed to schedule load callback for chunk " + ChunkHolder.this.pos, throwable); - return null; - }); - - // Run callback right away if the future was already done - chunkStorage.callbackExecutor.run(); - } - // CraftBukkit end - } - - public boolean wasAccessibleSinceLastSave() { - return this.wasAccessibleSinceLastSave; + return this.newChunkHolder.getTicketLevel(); // Paper - rewrite chunk system } - public void refreshAccessibility() { - this.wasAccessibleSinceLastSave = ChunkLevel.fullStatus(this.ticketLevel).isOrAfter(FullChunkStatus.FULL); - } + // Paper - rewrite chunk system public void replaceProtoChunk(ImposterProtoChunk chunk) { - for (int i = 0; i < this.futures.length(); ++i) { - CompletableFuture> completablefuture = (CompletableFuture) this.futures.get(i); - - if (completablefuture != null) { - ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) completablefuture.getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); - - if (ichunkaccess instanceof ProtoChunk) { - this.futures.set(i, CompletableFuture.completedFuture(ChunkResult.of(chunk))); - } - } - } - - this.updateChunkToSave(CompletableFuture.completedFuture(ChunkResult.of(chunk.getWrapped())), "replaceProto"); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public List>>> getAllFutures() { - List>>> list = new ArrayList(); - - for (int i = 0; i < ChunkHolder.CHUNK_STATUSES.size(); ++i) { - list.add(Pair.of((ChunkStatus) ChunkHolder.CHUNK_STATUSES.get(i), (CompletableFuture) this.futures.get(i))); - } - - return list; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @FunctionalInterface @@ -670,15 +395,15 @@ public class ChunkHolder { // Paper start public final boolean isEntityTickingReady() { - return this.isEntityTickingReady; + return this.newChunkHolder.isEntityTickingReady(); // Paper - rewrite chunk system } public final boolean isTickingReady() { - return this.isTickingReady; + return this.newChunkHolder.isTickingReady(); // Paper - rewrite chunk system } public final boolean isFullChunkReady() { - return this.isFullChunkReady; + return this.newChunkHolder.isFullChunkReady(); // Paper - rewrite chunk system } // Paper end } diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java index d3f63185edd1db9fab3887ea3f08982435b3a23c..721b63f7471ace33ae22f4205f554ee3be0e033d 100644 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java @@ -122,10 +122,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider public static final int MIN_VIEW_DISTANCE = 2; public static final int MAX_VIEW_DISTANCE = 32; public static final int FORCED_TICKET_LEVEL = ChunkLevel.byStatus(FullChunkStatus.ENTITY_TICKING); - public final Long2ObjectLinkedOpenHashMap updatingChunkMap = new Long2ObjectLinkedOpenHashMap(); - public volatile Long2ObjectLinkedOpenHashMap visibleChunkMap; - private final Long2ObjectLinkedOpenHashMap pendingUnloads; - private final LongSet entitiesInLevel; + // Paper - rewrite chunk system public final ServerLevel level; private final ThreadedLevelLightEngine lightEngine; public final BlockableEventLoop mainThreadExecutor; // Paper - public @@ -134,11 +131,9 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider private final ChunkGeneratorStructureState chunkGeneratorState; public final Supplier overworldDataStorage; private final PoiManager poiManager; - public final LongSet toDrop; + // Paper - rewrite chunk system private boolean modified; - private final ChunkTaskPriorityQueueSorter queueSorter; - private final ProcessorHandle> worldgenMailbox; - private final ProcessorHandle> mainThreadMailbox; + // Paper - rewrite chunk system public final ChunkProgressListener progressListener; private final ChunkStatusUpdateListener chunkStatusListener; public final ChunkMap.ChunkDistanceManager distanceManager; @@ -150,28 +145,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider private final Long2LongMap chunkSaveCooldowns; private final Queue unloadQueue; public int serverViewDistance; - private WorldGenContext worldGenContext; - - // CraftBukkit start - recursion-safe executor for Chunk loadCallback() and unloadCallback() - public final CallbackExecutor callbackExecutor = new CallbackExecutor(); - public static final class CallbackExecutor implements java.util.concurrent.Executor, Runnable { - - private final java.util.Queue queue = new java.util.ArrayDeque<>(); - - @Override - public void execute(Runnable runnable) { - this.queue.add(runnable); - } - - @Override - public void run() { - Runnable task; - while ((task = this.queue.poll()) != null) { - task.run(); - } - } - }; - // CraftBukkit end + private WorldGenContext worldGenContext; public final WorldGenContext getWorldGenContext() { return this.worldGenContext; } // Paper - rewrite chunk system // Paper start - distance maps private final com.destroystokyo.paper.util.misc.PooledLinkedHashSets pooledLinkedPlayerHashSets = new com.destroystokyo.paper.util.misc.PooledLinkedHashSets<>(); @@ -181,6 +155,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider int chunkZ = io.papermc.paper.util.MCUtil.getChunkCoordinate(player.getZ()); // Note: players need to be explicitly added to distance maps before they can be updated this.nearbyPlayers.addPlayer(player); + this.level.playerChunkLoader.addPlayer(player); // Paper - replace chunk loader } void removePlayerFromDistanceMaps(ServerPlayer player) { @@ -188,6 +163,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider int chunkZ = io.papermc.paper.util.MCUtil.getChunkCoordinate(player.getZ()); // Note: players need to be explicitly added to distance maps before they can be updated this.nearbyPlayers.removePlayer(player); + this.level.playerChunkLoader.removePlayer(player); // Paper - replace chunk loader } void updateMaps(ServerPlayer player) { @@ -195,6 +171,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider int chunkZ = io.papermc.paper.util.MCUtil.getChunkCoordinate(player.getZ()); // Note: players need to be explicitly added to distance maps before they can be updated this.nearbyPlayers.tickPlayer(player); + this.level.playerChunkLoader.updatePlayer(player); // Paper - replace chunk loader } // Paper end // Paper start @@ -224,17 +201,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } public final ChunkHolder getUnloadingChunkHolder(int chunkX, int chunkZ) { - return this.pendingUnloads.get(io.papermc.paper.util.CoordinateUtils.getChunkKey(chunkX, chunkZ)); + return null; // Paper - rewrite chunk system } public final io.papermc.paper.util.player.NearbyPlayers nearbyPlayers; // Paper end public ChunkMap(ServerLevel world, LevelStorageSource.LevelStorageAccess session, DataFixer dataFixer, StructureTemplateManager structureTemplateManager, Executor executor, BlockableEventLoop mainThreadExecutor, LightChunkGetter chunkProvider, ChunkGenerator chunkGenerator, ChunkProgressListener worldGenerationProgressListener, ChunkStatusUpdateListener chunkStatusChangeListener, Supplier persistentStateManagerFactory, int viewDistance, boolean dsync) { super(new RegionStorageInfo(session.getLevelId(), world.dimension(), "chunk"), session.getDimensionPath(world.dimension()).resolve("region"), dataFixer, dsync); - this.visibleChunkMap = this.updatingChunkMap.clone(); - this.pendingUnloads = new Long2ObjectLinkedOpenHashMap(); - this.entitiesInLevel = new LongOpenHashSet(); - this.toDrop = new LongOpenHashSet(); + // Paper - rewrite chunk system this.tickingGenerated = new AtomicInteger(); this.playerMap = new PlayerMap(); this.entityMap = new Int2ObjectOpenHashMap(); @@ -263,19 +237,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider this.chunkGeneratorState = chunkGenerator.createState(iregistrycustom.lookupOrThrow(Registries.STRUCTURE_SET), this.randomState, j, world.spigotConfig); // Spigot this.mainThreadExecutor = mainThreadExecutor; - ProcessorMailbox threadedmailbox = ProcessorMailbox.create(executor, "worldgen"); + // Paper - rewrite chunk system Objects.requireNonNull(mainThreadExecutor); - ProcessorHandle mailbox = ProcessorHandle.of("main", mainThreadExecutor::tell); + // Paper - rewrite chunk system this.progressListener = worldGenerationProgressListener; this.chunkStatusListener = chunkStatusChangeListener; - ProcessorMailbox threadedmailbox1 = ProcessorMailbox.create(executor, "light"); + // Paper - rewrite chunk system - this.queueSorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(threadedmailbox, mailbox, threadedmailbox1), executor, Integer.MAX_VALUE); - this.worldgenMailbox = this.queueSorter.getProcessor(threadedmailbox, false); - this.mainThreadMailbox = this.queueSorter.getProcessor(mailbox, false); - this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), threadedmailbox1, this.queueSorter.getProcessor(threadedmailbox1, false)); + // Paper - rewrite chunk system + this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), null, null); // Paper - rewrite chunk system this.distanceManager = new ChunkMap.ChunkDistanceManager(executor, mainThreadExecutor); this.overworldDataStorage = persistentStateManagerFactory; this.poiManager = new PoiManager(new RegionStorageInfo(session.getLevelId(), world.dimension(), "poi"), path.resolve("poi"), dataFixer, dsync, iregistrycustom, world); @@ -333,23 +305,15 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } boolean isChunkTracked(ServerPlayer player, int chunkX, int chunkZ) { - return player.getChunkTrackingView().contains(chunkX, chunkZ) && !player.connection.chunkSender.isPending(ChunkPos.asLong(chunkX, chunkZ)); + // Paper start - rewrite player chunk loader + return this.level.playerChunkLoader.isChunkSent(player, chunkX, chunkZ); + // Paper end - rewrite player chunk loader } private boolean isChunkOnTrackedBorder(ServerPlayer player, int chunkX, int chunkZ) { - if (!this.isChunkTracked(player, chunkX, chunkZ)) { - return false; - } else { - for (int k = -1; k <= 1; ++k) { - for (int l = -1; l <= 1; ++l) { - if ((k != 0 || l != 0) && !this.isChunkTracked(player, chunkX + k, chunkZ + l)) { - return true; - } - } - } - - return false; - } + // Paper start - rewrite player chunk loader + return this.level.playerChunkLoader.isChunkSent(player, chunkX, chunkZ, true); + // Paper end - rewrite player chunk loader } protected ThreadedLevelLightEngine getLightEngine() { @@ -358,20 +322,22 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider @Nullable protected ChunkHolder getUpdatingChunkIfPresent(long pos) { - return (ChunkHolder) this.updatingChunkMap.get(pos); + // Paper start - rewrite chunk system + io.papermc.paper.chunk.system.scheduling.NewChunkHolder holder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(pos); + return holder == null ? null : holder.vanillaChunkHolder; + // Paper end - rewrite chunk system } @Nullable public ChunkHolder getVisibleChunkIfPresent(long pos) { - return (ChunkHolder) this.visibleChunkMap.get(pos); + // Paper start - rewrite chunk system + io.papermc.paper.chunk.system.scheduling.NewChunkHolder holder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(pos); + return holder == null ? null : holder.vanillaChunkHolder; + // Paper end - rewrite chunk system } protected IntSupplier getChunkQueueLevel(long pos) { - return () -> { - ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos); - - return playerchunk == null ? ChunkTaskPriorityQueue.PRIORITY_LEVEL_COUNT - 1 : Math.min(playerchunk.getQueueLevel(), ChunkTaskPriorityQueue.PRIORITY_LEVEL_COUNT - 1); - }; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public String getChunkDebugData(ChunkPos chunkPos) { @@ -400,80 +366,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } private CompletableFuture>> getChunkRangeFuture(ChunkHolder centerChunk, int margin, IntFunction distanceToStatus) { - if (margin == 0) { - ChunkStatus chunkstatus = (ChunkStatus) distanceToStatus.apply(0); - - return centerChunk.getOrScheduleFuture(chunkstatus, this).thenApply((chunkresult) -> { - return chunkresult.map(List::of); - }); - } else { - List>> list = new ArrayList(); - List list1 = new ArrayList(); - ChunkPos chunkcoordintpair = centerChunk.getPos(); - int j = chunkcoordintpair.x; - int k = chunkcoordintpair.z; - - for (int l = -margin; l <= margin; ++l) { - for (int i1 = -margin; i1 <= margin; ++i1) { - int j1 = Math.max(Math.abs(i1), Math.abs(l)); - ChunkPos chunkcoordintpair1 = new ChunkPos(j + i1, k + l); - long k1 = chunkcoordintpair1.toLong(); - ChunkHolder playerchunk1 = this.getUpdatingChunkIfPresent(k1); - - if (playerchunk1 == null) { - return CompletableFuture.completedFuture(ChunkResult.error(() -> { - return "Unloaded " + String.valueOf(chunkcoordintpair1); - })); - } - - ChunkStatus chunkstatus1 = (ChunkStatus) distanceToStatus.apply(j1); - CompletableFuture> completablefuture = playerchunk1.getOrScheduleFuture(chunkstatus1, this); - - list1.add(playerchunk1); - list.add(completablefuture); - } - } - - CompletableFuture>> completablefuture1 = Util.sequence(list); - CompletableFuture>> completablefuture2 = completablefuture1.thenApply((list2) -> { - List list3 = Lists.newArrayList(); - // CraftBukkit start - decompile error - int cnt = 0; - - for (Iterator iterator = list2.iterator(); iterator.hasNext(); ++cnt) { - final int l1 = cnt; - // CraftBukkit end - ChunkResult chunkresult = (ChunkResult) iterator.next(); - - if (chunkresult == null) { - throw this.debugFuturesAndCreateReportedException(new IllegalStateException("At least one of the chunk futures were null"), "n/a"); - } - - ChunkAccess ichunkaccess = (ChunkAccess) chunkresult.orElse(null); // CraftBukkit - decompile error - - if (ichunkaccess == null) { - return ChunkResult.error(() -> { - String s = String.valueOf(new ChunkPos(j + l1 % (margin * 2 + 1), k + l1 / (margin * 2 + 1))); - - return "Unloaded " + s + " " + chunkresult.getError(); - }); - } - - list3.add(ichunkaccess); - } - - return ChunkResult.of(list3); - }); - Iterator iterator = list1.iterator(); - - while (iterator.hasNext()) { - ChunkHolder playerchunk2 = (ChunkHolder) iterator.next(); - - playerchunk2.addSaveDependency("getChunkRangeFuture " + String.valueOf(chunkcoordintpair) + " " + margin, completablefuture2); - } - - return completablefuture2; - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public ReportedException debugFuturesAndCreateReportedException(IllegalStateException exception, String details) { @@ -503,263 +396,72 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } public CompletableFuture> prepareEntityTickingChunk(ChunkHolder chunk) { - return this.getChunkRangeFuture(chunk, 2, (i) -> { - return ChunkStatus.FULL; - }).thenApplyAsync((chunkresult) -> { - return chunkresult.map((list) -> { - return (LevelChunk) list.get(list.size() / 2); - }); - }, this.mainThreadExecutor); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @Nullable ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k) { - if (!ChunkLevel.isLoaded(k) && !ChunkLevel.isLoaded(level)) { - return holder; - } else { - if (holder != null) { - holder.setTicketLevel(level); - } - - if (holder != null) { - if (!ChunkLevel.isLoaded(level)) { - this.toDrop.add(pos); - } else { - this.toDrop.remove(pos); - } - } - - if (ChunkLevel.isLoaded(level) && holder == null) { - holder = (ChunkHolder) this.pendingUnloads.remove(pos); - if (holder != null) { - holder.setTicketLevel(level); - } else { - holder = new ChunkHolder(new ChunkPos(pos), level, this.level, this.lightEngine, this.queueSorter, this); - // Paper start - io.papermc.paper.chunk.system.ChunkSystem.onChunkHolderCreate(this.level, holder); - // Paper end - } - - // Paper start - holder.onChunkAdd(); - // Paper end - this.updatingChunkMap.put(pos, holder); - this.modified = true; - } - - return holder; - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @Override public void close() throws IOException { - try { - this.queueSorter.close(); - this.poiManager.close(); - } finally { - super.close(); - } + throw new UnsupportedOperationException("Use ServerChunkCache#close"); // Paper - rewrite chunk system + } + // Paper start - rewrite chunk system + protected void saveIncrementally() { + this.level.chunkTaskScheduler.chunkHolderManager.autoSave(); // Paper - rewrite chunk system } + // Paper end - - rewrite chunk system protected void saveAllChunks(boolean flush) { - if (flush) { - List list = io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).toList(); // Paper - MutableBoolean mutableboolean = new MutableBoolean(); - - do { - mutableboolean.setFalse(); - list.stream().map((playerchunk) -> { - CompletableFuture completablefuture; - - do { - completablefuture = playerchunk.getChunkToSave(); - BlockableEventLoop iasynctaskhandler = this.mainThreadExecutor; - - Objects.requireNonNull(completablefuture); - iasynctaskhandler.managedBlock(completablefuture::isDone); - } while (completablefuture != playerchunk.getChunkToSave()); - - return (ChunkAccess) completablefuture.join(); - }).filter((ichunkaccess) -> { - return ichunkaccess instanceof ImposterProtoChunk || ichunkaccess instanceof LevelChunk; - }).filter(this::save).forEach((ichunkaccess) -> { - mutableboolean.setTrue(); - }); - } while (mutableboolean.isTrue()); - - this.processUnloads(() -> { - return true; - }); - this.flushWorker(); - } else { - io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).forEach(this::saveChunkIfNeeded); - } - + this.level.chunkTaskScheduler.chunkHolderManager.saveAllChunks(flush, false, false); // Paper - rewrite chunk system } protected void tick(BooleanSupplier shouldKeepTicking) { ProfilerFiller gameprofilerfiller = this.level.getProfiler(); + try (Timing ignored = this.level.timings.poiUnload.startTiming()) { // Paper gameprofilerfiller.push("poi"); this.poiManager.tick(shouldKeepTicking); + } // Paper gameprofilerfiller.popPush("chunk_unload"); if (!this.level.noSave()) { + try (Timing ignored = this.level.timings.chunkUnload.startTiming()) { // Paper this.processUnloads(shouldKeepTicking); + } // Paper } gameprofilerfiller.pop(); } public boolean hasWork() { - return this.lightEngine.hasLightWork() || !this.pendingUnloads.isEmpty() || io.papermc.paper.chunk.system.ChunkSystem.hasAnyChunkHolders(this.level) || this.poiManager.hasWork() || !this.toDrop.isEmpty() || !this.unloadQueue.isEmpty() || this.queueSorter.hasWork() || this.distanceManager.hasTickets(); // Paper + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } private void processUnloads(BooleanSupplier shouldKeepTicking) { - LongIterator longiterator = this.toDrop.iterator(); - - for (int i = 0; longiterator.hasNext() && (shouldKeepTicking.getAsBoolean() || i < 200 || this.toDrop.size() > 2000); longiterator.remove()) { - long j = longiterator.nextLong(); - ChunkHolder playerchunk = (ChunkHolder) this.updatingChunkMap.remove(j); - - if (playerchunk != null) { - playerchunk.onChunkRemove(); // Paper - this.pendingUnloads.put(j, playerchunk); - this.modified = true; - ++i; - this.scheduleUnload(j, playerchunk); - } - } - - int k = Math.max(0, this.unloadQueue.size() - 2000); - - Runnable runnable; - - while ((shouldKeepTicking.getAsBoolean() || k > 0) && (runnable = (Runnable) this.unloadQueue.poll()) != null) { - --k; - runnable.run(); - } - - int l = 0; - Iterator objectiterator = io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).iterator(); // Paper - - while (l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) { - if (this.saveChunkIfNeeded((ChunkHolder) objectiterator.next())) { - ++l; - } - } + this.level.chunkTaskScheduler.chunkHolderManager.processUnloads(); // Paper - rewrite chunk system } private void scheduleUnload(long pos, ChunkHolder holder) { - CompletableFuture completablefuture = holder.getChunkToSave(); - Consumer consumer = (ichunkaccess) -> { // CraftBukkit - decompile error - CompletableFuture completablefuture1 = holder.getChunkToSave(); - - if (completablefuture1 != completablefuture) { - this.scheduleUnload(pos, holder); - } else { - // Paper start - boolean removed; - if ((removed = this.pendingUnloads.remove(pos, holder)) && ichunkaccess != null) { - io.papermc.paper.chunk.system.ChunkSystem.onChunkHolderDelete(this.level, holder); - // Paper end - if (ichunkaccess instanceof LevelChunk) { - ((LevelChunk) ichunkaccess).setLoaded(false); - } - - this.save(ichunkaccess); - if (this.entitiesInLevel.remove(pos) && ichunkaccess instanceof LevelChunk) { - LevelChunk chunk = (LevelChunk) ichunkaccess; - - this.level.unload(chunk); - } - - this.lightEngine.updateChunkStatus(ichunkaccess.getPos()); - this.lightEngine.tryScheduleUpdate(); - this.progressListener.onStatusChange(ichunkaccess.getPos(), (ChunkStatus) null); - this.chunkSaveCooldowns.remove(ichunkaccess.getPos().toLong()); - } else if (removed) { // Paper start - io.papermc.paper.chunk.system.ChunkSystem.onChunkHolderDelete(this.level, holder); - } // Paper end - - } - }; - Queue queue = this.unloadQueue; - - Objects.requireNonNull(this.unloadQueue); - completablefuture.thenAcceptAsync(consumer, queue::add).whenComplete((ovoid, throwable) -> { - if (throwable != null) { - ChunkMap.LOGGER.error("Failed to save chunk {}", holder.getPos(), throwable); - } - - }); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } protected boolean promoteChunkMap() { - if (!this.modified) { - return false; - } else { - this.visibleChunkMap = this.updatingChunkMap.clone(); - this.modified = false; - return true; - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public CompletableFuture> schedule(ChunkHolder holder, ChunkStatus requiredStatus) { - ChunkPos chunkcoordintpair = holder.getPos(); - - if (requiredStatus == ChunkStatus.EMPTY) { - return this.scheduleChunkLoad(chunkcoordintpair).thenApply(ChunkResult::of); - } else { - if (requiredStatus == ChunkStatus.LIGHT) { - this.distanceManager.addTicket(TicketType.LIGHT, chunkcoordintpair, ChunkLevel.byStatus(ChunkStatus.LIGHT), chunkcoordintpair); - } - - if (!requiredStatus.hasLoadDependencies()) { - ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) holder.getOrScheduleFuture(requiredStatus.getParent(), this).getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); - - if (ichunkaccess != null && ichunkaccess.getStatus().isOrAfter(requiredStatus)) { - CompletableFuture completablefuture = requiredStatus.load(this.worldGenContext, (ichunkaccess1) -> { - return this.protoChunkToFullChunk(holder, ichunkaccess1); - }, ichunkaccess); - - this.progressListener.onStatusChange(chunkcoordintpair, requiredStatus); - return completablefuture.thenApply(ChunkResult::of); - } - } - - return this.scheduleChunkGeneration(holder, requiredStatus); - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } private CompletableFuture scheduleChunkLoad(ChunkPos pos) { - return this.readChunk(pos).thenApply((optional) -> { - return optional.filter((nbttagcompound) -> { - boolean flag = ChunkMap.isChunkDataValid(nbttagcompound); - - if (!flag) { - ChunkMap.LOGGER.error("Chunk file at {} is missing level data, skipping", pos); - } - - return flag; - }); - }).thenApplyAsync((optional) -> { - this.level.getProfiler().incrementCounter("chunkLoad"); - if (optional.isPresent()) { - ProtoChunk protochunk = ChunkSerializer.read(this.level, this.poiManager, pos, (CompoundTag) optional.get()); - - this.markPosition(pos, protochunk.getStatus().getChunkType()); - return protochunk; - } else { - return this.createEmptyChunk(pos); - } - }, this.mainThreadExecutor).exceptionallyAsync((throwable) -> { - return this.handleChunkLoadFailure(throwable, pos); - }, this.mainThreadExecutor); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } - private static boolean isChunkDataValid(CompoundTag nbt) { + public static boolean isChunkDataValid(CompoundTag nbt) { // Paper - async chunk loading return nbt.contains("Status", 8); } @@ -816,60 +518,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } private CompletableFuture> scheduleChunkGeneration(ChunkHolder holder, ChunkStatus requiredStatus) { - ChunkPos chunkcoordintpair = holder.getPos(); - CompletableFuture>> completablefuture = this.getChunkRangeFuture(holder, requiredStatus.getRange(), (i) -> { - return this.getDependencyStatus(requiredStatus, i); - }); - - this.level.getProfiler().incrementCounter(() -> { - return "chunkGenerate " + String.valueOf(requiredStatus); - }); - Executor executor = (runnable) -> { - this.worldgenMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable)); - }; - - return completablefuture.thenComposeAsync((chunkresult) -> { - List list = (List) chunkresult.orElse(null); // CraftBukkit - decompile error - - if (list == null) { - this.releaseLightTicket(chunkcoordintpair); - Objects.requireNonNull(chunkresult); - return CompletableFuture.completedFuture(ChunkResult.error(chunkresult::getError)); - } else { - try { - ChunkAccess ichunkaccess = (ChunkAccess) list.get(list.size() / 2); - CompletableFuture completablefuture1; - - if (ichunkaccess.getStatus().isOrAfter(requiredStatus)) { - completablefuture1 = requiredStatus.load(this.worldGenContext, (ichunkaccess1) -> { - return this.protoChunkToFullChunk(holder, ichunkaccess1); - }, ichunkaccess); - } else { - completablefuture1 = requiredStatus.generate(this.worldGenContext, executor, (ichunkaccess1) -> { - return this.protoChunkToFullChunk(holder, ichunkaccess1); - }, list); - } - - this.progressListener.onStatusChange(chunkcoordintpair, requiredStatus); - return completablefuture1.thenApply(ChunkResult::of); - } catch (Exception exception) { - exception.getStackTrace(); - CrashReport crashreport = CrashReport.forThrowable(exception, "Exception generating new chunk"); - CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Chunk to be generated"); - - crashreportsystemdetails.setDetail("Status being generated", () -> { - return BuiltInRegistries.CHUNK_STATUS.getKey(requiredStatus).toString(); - }); - crashreportsystemdetails.setDetail("Location", (Object) String.format(Locale.ROOT, "%d,%d", chunkcoordintpair.x, chunkcoordintpair.z)); - crashreportsystemdetails.setDetail("Position hash", (Object) ChunkPos.asLong(chunkcoordintpair.x, chunkcoordintpair.z)); - crashreportsystemdetails.setDetail("Generator", (Object) this.generator); - this.mainThreadExecutor.execute(() -> { - throw new ReportedException(crashreport); - }); - throw new ReportedException(crashreport); - } - } - }, executor); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } protected void releaseLightTicket(ChunkPos pos) { @@ -880,7 +529,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider })); } - private ChunkStatus getDependencyStatus(ChunkStatus centerChunkTargetStatus, int distance) { + public static ChunkStatus getDependencyStatus(ChunkStatus centerChunkTargetStatus, int distance) { // Paper -> public, static ChunkStatus chunkstatus1; if (distance == 0) { @@ -892,7 +541,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider return chunkstatus1; } - private static void postLoadProtoChunk(ServerLevel world, List nbt) { + public static void postLoadProtoChunk(ServerLevel world, List nbt, ChunkPos position) { // Paper - public and add chunk position parameter if (!nbt.isEmpty()) { // CraftBukkit start - these are spawned serialized (DefinedStructure) and we don't call an add event below at the moment due to ordering complexities world.addWorldGenChunkEntities(EntityType.loadEntitiesRecursive(nbt, world).filter((entity) -> { @@ -908,45 +557,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } checkDupeUUID(world, entity); // Paper - duplicate uuid resolving return !needsRemoval; - })); + }), position); // Paper - rewrite chunk system // CraftBukkit end } } private CompletableFuture protoChunkToFullChunk(ChunkHolder playerchunk, ChunkAccess ichunkaccess) { - return CompletableFuture.supplyAsync(() -> { - ChunkPos chunkcoordintpair = playerchunk.getPos(); - ProtoChunk protochunk = (ProtoChunk) ichunkaccess; - LevelChunk chunk; - - if (protochunk instanceof ImposterProtoChunk) { - chunk = ((ImposterProtoChunk) protochunk).getWrapped(); - } else { - chunk = new LevelChunk(this.level, protochunk, (chunk1) -> { - ChunkMap.postLoadProtoChunk(this.level, protochunk.getEntities()); - }); - playerchunk.replaceProtoChunk(new ImposterProtoChunk(chunk, false)); - } - - chunk.setFullStatus(() -> { - return ChunkLevel.fullStatus(playerchunk.getTicketLevel()); - }); - chunk.runPostLoad(); - if (this.entitiesInLevel.add(chunkcoordintpair.toLong())) { - chunk.setLoaded(true); - chunk.registerAllBlockEntitiesAfterLevelLoad(); - chunk.registerTickContainerInLevel(this.level); - } - - return chunk; - }, (runnable) -> { - ProcessorHandle mailbox = this.mainThreadMailbox; - long i = playerchunk.getPos().toLong(); - - Objects.requireNonNull(playerchunk); - mailbox.tell(ChunkTaskPriorityQueueSorter.message(runnable, i, playerchunk::getTicketLevel)); - }); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } // Paper start - duplicate uuid resolving @@ -990,61 +608,16 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider // Paper end - duplicate uuid resolving public CompletableFuture> prepareTickingChunk(ChunkHolder holder) { - CompletableFuture>> completablefuture = this.getChunkRangeFuture(holder, 1, (i) -> { - return ChunkStatus.FULL; - }); - CompletableFuture> completablefuture1 = completablefuture.thenApplyAsync((chunkresult) -> { - return chunkresult.map((list) -> { - return (LevelChunk) list.get(list.size() / 2); - }); - }, (runnable) -> { - this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable)); - }).thenApplyAsync((chunkresult) -> { - return chunkresult.ifSuccess((chunk) -> { - chunk.postProcessGeneration(); - this.level.startTickingChunk(chunk); - CompletableFuture completablefuture2 = holder.getChunkSendSyncFuture(); - - if (completablefuture2.isDone()) { - this.onChunkReadyToSend(chunk); - } else { - completablefuture2.thenAcceptAsync((object) -> { - this.onChunkReadyToSend(chunk); - }, this.mainThreadExecutor); - } - - }); - }, this.mainThreadExecutor); - - completablefuture1.handle((chunkresult, throwable) -> { - this.tickingGenerated.getAndIncrement(); - return null; - }); - return completablefuture1; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } private void onChunkReadyToSend(LevelChunk chunk) { - ChunkPos chunkcoordintpair = chunk.getPos(); - Iterator iterator = this.playerMap.getAllPlayers().iterator(); - - while (iterator.hasNext()) { - ServerPlayer entityplayer = (ServerPlayer) iterator.next(); - - if (entityplayer.getChunkTrackingView().contains(chunkcoordintpair)) { - ChunkMap.markChunkPendingToSend(entityplayer, chunk); - } - } + throw new UnsupportedOperationException(); // Paper - rewrite player chunk loader } public CompletableFuture> prepareAccessibleChunk(ChunkHolder holder) { - return this.getChunkRangeFuture(holder, 1, ChunkStatus::getStatusAroundFullChunk).thenApplyAsync((chunkresult) -> { - return chunkresult.map((list) -> { - return (LevelChunk) list.get(list.size() / 2); - }); - }, (runnable) -> { - this.mainThreadMailbox.tell(ChunkTaskPriorityQueueSorter.message(holder, runnable)); - }); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public int getTickingGenerated() { @@ -1052,96 +625,15 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } private boolean saveChunkIfNeeded(ChunkHolder chunkHolder) { - if (!chunkHolder.wasAccessibleSinceLastSave()) { - return false; - } else { - ChunkAccess ichunkaccess = (ChunkAccess) chunkHolder.getChunkToSave().getNow(null); // CraftBukkit - decompile error - - if (!(ichunkaccess instanceof ImposterProtoChunk) && !(ichunkaccess instanceof LevelChunk)) { - return false; - } else { - long i = ichunkaccess.getPos().toLong(); - long j = this.chunkSaveCooldowns.getOrDefault(i, -1L); - long k = System.currentTimeMillis(); - - if (k < j) { - return false; - } else { - boolean flag = this.save(ichunkaccess); - - chunkHolder.refreshAccessibility(); - if (flag) { - this.chunkSaveCooldowns.put(i, k + 10000L); - } - - return flag; - } - } - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public boolean save(ChunkAccess chunk) { - this.poiManager.flush(chunk.getPos()); - if (!chunk.isUnsaved()) { - return false; - } else { - chunk.setUnsaved(false); - ChunkPos chunkcoordintpair = chunk.getPos(); - - try { - ChunkStatus chunkstatus = chunk.getStatus(); - - if (chunkstatus.getChunkType() != ChunkType.LEVELCHUNK) { - if (this.isExistingChunkFull(chunkcoordintpair)) { - return false; - } - - if (chunkstatus == ChunkStatus.EMPTY && chunk.getAllStarts().values().stream().noneMatch(StructureStart::isValid)) { - return false; - } - } - - this.level.getProfiler().incrementCounter("chunkSave"); - CompoundTag nbttagcompound = ChunkSerializer.write(this.level, chunk); - - this.write(chunkcoordintpair, nbttagcompound).exceptionallyAsync((throwable) -> { - this.level.getServer().reportChunkSaveFailure(chunkcoordintpair); - return null; - }, this.mainThreadExecutor); - this.markPosition(chunkcoordintpair, chunkstatus.getChunkType()); - return true; - } catch (Exception exception) { - ChunkMap.LOGGER.error("Failed to save chunk {},{}", new Object[]{chunkcoordintpair.x, chunkcoordintpair.z, exception}); - this.level.getServer().reportChunkSaveFailure(chunkcoordintpair); - return false; - } - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } private boolean isExistingChunkFull(ChunkPos pos) { - byte b0 = this.chunkTypeCache.get(pos.toLong()); - - if (b0 != 0) { - return b0 == 1; - } else { - CompoundTag nbttagcompound; - - try { - nbttagcompound = (CompoundTag) ((Optional) this.readChunk(pos).join()).orElse((Object) null); - if (nbttagcompound == null) { - this.markPositionReplaceable(pos); - return false; - } - } catch (Exception exception) { - ChunkMap.LOGGER.error("Failed to read chunk {}", pos, exception); - this.markPositionReplaceable(pos); - return false; - } - - ChunkType chunktype = ChunkSerializer.getChunkTypeFromTag(nbttagcompound); - - return this.markPosition(pos, chunktype) == 1; - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public void setServerViewDistance(int watchDistance) { // Paper - public @@ -1149,37 +641,36 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider if (j != this.serverViewDistance) { this.serverViewDistance = j; - this.distanceManager.updatePlayerTickets(this.serverViewDistance); - Iterator iterator = this.playerMap.getAllPlayers().iterator(); + this.level.playerChunkLoader.setLoadDistance(this.serverViewDistance + 1); // Paper - replace player loader system + } - while (iterator.hasNext()) { - ServerPlayer entityplayer = (ServerPlayer) iterator.next(); + } - this.updateChunkTracking(entityplayer); - } - } + // Paper start - replace player loader system + public void setTickViewDistance(int distance) { + this.level.playerChunkLoader.setTickDistance(distance); + } + public void setSendViewDistance(int distance) { + this.level.playerChunkLoader.setSendDistance(distance); } + // Paper end - replace player loader system public int getPlayerViewDistance(ServerPlayer player) { // Paper - public - return Mth.clamp(player.requestedViewDistance(), 2, this.serverViewDistance); + return io.papermc.paper.chunk.system.ChunkSystem.getSendViewDistance(player); // Paper - per player view distance } private void markChunkPendingToSend(ServerPlayer player, ChunkPos pos) { - LevelChunk chunk = this.getChunkToSend(pos.toLong()); - - if (chunk != null) { - ChunkMap.markChunkPendingToSend(player, chunk); - } + throw new UnsupportedOperationException(); // Paper - per player view distance } private static void markChunkPendingToSend(ServerPlayer player, LevelChunk chunk) { - player.connection.chunkSender.markChunkPendingToSend(chunk); + throw new UnsupportedOperationException(); // Paper - rewrite player chunk loader } private static void dropChunk(ServerPlayer player, ChunkPos pos) { - player.connection.chunkSender.dropChunk(player, pos); + // Paper - rewrite player chunk loader } @Nullable @@ -1202,30 +693,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } void dumpChunks(Writer writer) throws IOException { - CsvOutput csvwriter = CsvOutput.builder().addColumn("x").addColumn("z").addColumn("level").addColumn("in_memory").addColumn("status").addColumn("full_status").addColumn("accessible_ready").addColumn("ticking_ready").addColumn("entity_ticking_ready").addColumn("ticket").addColumn("spawning").addColumn("block_entity_count").addColumn("ticking_ticket").addColumn("ticking_level").addColumn("block_ticks").addColumn("fluid_ticks").build(writer); - TickingTracker tickingtracker = this.distanceManager.tickingTracker(); - Iterator objectbidirectionaliterator = io.papermc.paper.chunk.system.ChunkSystem.getVisibleChunkHolders(this.level).iterator(); // Paper - - while (objectbidirectionaliterator.hasNext()) { - ChunkHolder playerchunk = objectbidirectionaliterator.next(); // Paper - long i = playerchunk.pos.toLong(); // Paper - ChunkPos chunkcoordintpair = new ChunkPos(i); - // Paper - Optional optional = Optional.ofNullable(playerchunk.getLastAvailable()); - Optional optional1 = optional.flatMap((ichunkaccess) -> { - return ichunkaccess instanceof LevelChunk ? Optional.of((LevelChunk) ichunkaccess) : Optional.empty(); - }); - - // CraftBukkit - decompile error - csvwriter.writeRow(chunkcoordintpair.x, chunkcoordintpair.z, playerchunk.getTicketLevel(), optional.isPresent(), optional.map(ChunkAccess::getStatus).orElse(null), optional1.map(LevelChunk::getFullStatus).orElse(null), ChunkMap.printFuture(playerchunk.getFullChunkFuture()), ChunkMap.printFuture(playerchunk.getTickingChunkFuture()), ChunkMap.printFuture(playerchunk.getEntityTickingChunkFuture()), this.distanceManager.getTicketDebugString(i), this.anyPlayerCloseEnoughForSpawning(chunkcoordintpair), optional1.map((chunk) -> { - return chunk.getBlockEntities().size(); - }).orElse(0), tickingtracker.getTicketDebugString(i), tickingtracker.getLevel(i), optional1.map((chunk) -> { - return chunk.getBlockTicks().count(); - }).orElse(0), optional1.map((chunk) -> { - return chunk.getFluidTicks().count(); - }).orElse(0)); - } - + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } private static String printFuture(CompletableFuture> future) { @@ -1240,6 +708,32 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } } + // Paper start - Asynchronous chunk io + @Nullable + @Override + public CompoundTag readSync(ChunkPos chunkcoordintpair) throws IOException { + if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { + return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData( + this.level, chunkcoordintpair.x, chunkcoordintpair.z, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA, + io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread() + ); + } + return super.readSync(chunkcoordintpair); + } + + @Override + public CompletableFuture write(ChunkPos chunkcoordintpair, CompoundTag nbttagcompound) throws IOException { + if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { + io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave( + this.level, chunkcoordintpair.x, chunkcoordintpair.z, nbttagcompound, + io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA); + return null; + } + super.write(chunkcoordintpair, nbttagcompound); + return null; + } + // Paper end + private CompletableFuture> readChunk(ChunkPos chunkPos) { return this.read(chunkPos).thenApplyAsync((optional) -> { return optional.map((nbttagcompound) -> this.upgradeChunkTag(nbttagcompound, chunkPos)); // CraftBukkit @@ -1340,8 +834,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider this.distanceManager.addPlayer(SectionPos.of((EntityAccess) player), player); } - player.setChunkTrackingView(ChunkTrackingView.EMPTY); - this.updateChunkTracking(player); + // Paper - handled by player chunk loader this.addPlayerToDistanceMaps(player); // Paper - distance maps } else { SectionPos sectionposition = player.getLastSectionPos(); @@ -1352,7 +845,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } this.removePlayerFromDistanceMaps(player); // Paper - distance maps - this.applyChunkTrackingView(player, ChunkTrackingView.EMPTY); + // Paper - handled by player chunk loader } } @@ -1400,71 +893,30 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider this.playerMap.unIgnorePlayer(player); } - this.updateChunkTracking(player); + // Paper - replaced by PlayerChunkLoader } this.updateMaps(player); // Paper - distance maps } private void updateChunkTracking(ServerPlayer player) { - ChunkPos chunkcoordintpair = player.chunkPosition(); - int i = this.getPlayerViewDistance(player); - ChunkTrackingView chunktrackingview = player.getChunkTrackingView(); - - if (chunktrackingview instanceof ChunkTrackingView.Positioned chunktrackingview_a) { - if (chunktrackingview_a.center().equals(chunkcoordintpair) && chunktrackingview_a.viewDistance() == i) { - return; - } - } - - this.applyChunkTrackingView(player, ChunkTrackingView.of(chunkcoordintpair, i)); + throw new UnsupportedOperationException(); // Paper - replaced by PlayerChunkLoader } private void applyChunkTrackingView(ServerPlayer player, ChunkTrackingView chunkFilter) { - if (player.level() == this.level) { - ChunkTrackingView chunktrackingview1 = player.getChunkTrackingView(); - - if (chunkFilter instanceof ChunkTrackingView.Positioned) { - label15: - { - ChunkTrackingView.Positioned chunktrackingview_a = (ChunkTrackingView.Positioned) chunkFilter; - - if (chunktrackingview1 instanceof ChunkTrackingView.Positioned) { - ChunkTrackingView.Positioned chunktrackingview_a1 = (ChunkTrackingView.Positioned) chunktrackingview1; - - if (chunktrackingview_a1.center().equals(chunktrackingview_a.center())) { - break label15; - } - } - - player.connection.send(new ClientboundSetChunkCacheCenterPacket(chunktrackingview_a.center().x, chunktrackingview_a.center().z)); - } - } - - ChunkTrackingView.difference(chunktrackingview1, chunkFilter, (chunkcoordintpair) -> { - this.markChunkPendingToSend(player, chunkcoordintpair); - }, (chunkcoordintpair) -> { - ChunkMap.dropChunk(player, chunkcoordintpair); - }); - player.setChunkTrackingView(chunkFilter); - } + throw new UnsupportedOperationException(); // Paper - replaced by PlayerChunkLoader } @Override public List getPlayers(ChunkPos chunkPos, boolean onlyOnWatchDistanceEdge) { - Set set = this.playerMap.getAllPlayers(); - Builder builder = ImmutableList.builder(); - Iterator iterator = set.iterator(); - - while (iterator.hasNext()) { - ServerPlayer entityplayer = (ServerPlayer) iterator.next(); - - if (onlyOnWatchDistanceEdge && this.isChunkOnTrackedBorder(entityplayer, chunkPos.x, chunkPos.z) || !onlyOnWatchDistanceEdge && this.isChunkTracked(entityplayer, chunkPos.x, chunkPos.z)) { - builder.add(entityplayer); - } + // Paper start - per player view distance + ChunkHolder holder = this.getVisibleChunkIfPresent(chunkPos.toLong()); + if (holder == null) { + return new java.util.ArrayList<>(); + } else { + return holder.getPlayers(onlyOnWatchDistanceEdge); } - - return builder.build(); + // Paper end - per player view distance } public void addEntity(Entity entity) { @@ -1535,13 +987,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } protected void tick() { - Iterator iterator = this.playerMap.getAllPlayers().iterator(); - - while (iterator.hasNext()) { - ServerPlayer entityplayer = (ServerPlayer) iterator.next(); - - this.updateChunkTracking(entityplayer); - } + // Paper - replaced by PlayerChunkLoader List list = Lists.newArrayList(); List list1 = this.level.players(); @@ -1648,16 +1094,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider } public void waitForLightBeforeSending(ChunkPos centerPos, int radius) { - int j = radius + 1; - - ChunkPos.rangeClosed(centerPos, j).forEach((chunkcoordintpair1) -> { - ChunkHolder playerchunk = this.getVisibleChunkIfPresent(chunkcoordintpair1.toLong()); - - if (playerchunk != null) { - playerchunk.addSendDependency(this.lightEngine.waitForPendingTasks(chunkcoordintpair1.x, chunkcoordintpair1.z)); - } - - }); + // Paper - rewrite player chunk loader } public class ChunkDistanceManager extends DistanceManager { // Paper - public @@ -1668,7 +1105,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider @Override protected boolean isChunkToRemove(long pos) { - return ChunkMap.this.toDrop.contains(pos); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @Nullable diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java index 7a48ae2ba962ff56d0abff581b51f28b48bd9aae..ed5154e41ca858f4d6b4d1c276c66831c038d2a6 100644 --- a/src/main/java/net/minecraft/server/level/DistanceManager.java +++ b/src/main/java/net/minecraft/server/level/DistanceManager.java @@ -38,65 +38,28 @@ import org.slf4j.Logger; public abstract class DistanceManager { + // Paper start - rewrite chunk system + public io.papermc.paper.chunk.system.scheduling.ChunkHolderManager getChunkHolderManager() { + return this.chunkMap.level.chunkTaskScheduler.chunkHolderManager; + } + // Paper end - rewrite chunk system + static final Logger LOGGER = LogUtils.getLogger(); static final int PLAYER_TICKET_LEVEL = ChunkLevel.byStatus(FullChunkStatus.ENTITY_TICKING); private static final int INITIAL_TICKET_LIST_CAPACITY = 4; final Long2ObjectMap> playersPerChunk = new Long2ObjectOpenHashMap(); - public final Long2ObjectOpenHashMap>> tickets = new Long2ObjectOpenHashMap(); - private final DistanceManager.ChunkTicketTracker ticketTracker = new DistanceManager.ChunkTicketTracker(); + // Paper - rewrite chunk system private final DistanceManager.FixedPlayerDistanceChunkTracker naturalSpawnChunkCounter = new DistanceManager.FixedPlayerDistanceChunkTracker(8); - private final TickingTracker tickingTicketsTracker = new TickingTracker(); - private final DistanceManager.PlayerTicketTracker playerTicketManager = new DistanceManager.PlayerTicketTracker(32); - final Set chunksToUpdateFutures = Sets.newHashSet(); - final ChunkTaskPriorityQueueSorter ticketThrottler; - final ProcessorHandle> ticketThrottlerInput; - final ProcessorHandle ticketThrottlerReleaser; - final LongSet ticketsToRelease = new LongOpenHashSet(); - final Executor mainThreadExecutor; - private long ticketTickCounter; - public int simulationDistance = 10; + // Paper - rewrite chunk system private final ChunkMap chunkMap; // Paper protected DistanceManager(Executor workerExecutor, Executor mainThreadExecutor, ChunkMap chunkMap) { - Objects.requireNonNull(mainThreadExecutor); - ProcessorHandle mailbox = ProcessorHandle.of("player ticket throttler", mainThreadExecutor::execute); - ChunkTaskPriorityQueueSorter chunktaskqueuesorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(mailbox), workerExecutor, 4); - - this.ticketThrottler = chunktaskqueuesorter; - this.ticketThrottlerInput = chunktaskqueuesorter.getProcessor(mailbox, true); - this.ticketThrottlerReleaser = chunktaskqueuesorter.getReleaseProcessor(mailbox); - this.mainThreadExecutor = mainThreadExecutor; + // Paper - rewrite chunk system this.chunkMap = chunkMap; // Paper } protected void purgeStaleTickets() { - ++this.ticketTickCounter; - ObjectIterator>>> objectiterator = this.tickets.long2ObjectEntrySet().fastIterator(); - - while (objectiterator.hasNext()) { - Entry>> entry = (Entry) objectiterator.next(); - Iterator> iterator = ((SortedArraySet) entry.getValue()).iterator(); - boolean flag = false; - - while (iterator.hasNext()) { - Ticket ticket = (Ticket) iterator.next(); - - if (ticket.timedOut(this.ticketTickCounter)) { - iterator.remove(); - flag = true; - this.tickingTicketsTracker.removeTicket(entry.getLongKey(), ticket); - } - } - - if (flag) { - this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt((SortedArraySet) entry.getValue()), false); - } - - if (((SortedArraySet) entry.getValue()).isEmpty()) { - objectiterator.remove(); - } - } - + this.getChunkHolderManager().tick(); // Paper - rewrite chunk system } private static int getTicketLevelAt(SortedArraySet> tickets) { @@ -112,108 +75,25 @@ public abstract class DistanceManager { protected abstract ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k); public boolean runAllUpdates(ChunkMap chunkStorage) { - this.naturalSpawnChunkCounter.runAllUpdates(); - this.tickingTicketsTracker.runAllUpdates(); - this.playerTicketManager.runAllUpdates(); - int i = Integer.MAX_VALUE - this.ticketTracker.runDistanceUpdates(Integer.MAX_VALUE); - boolean flag = i != 0; - - if (flag) { - ; - } - - if (!this.chunksToUpdateFutures.isEmpty()) { - // CraftBukkit start - // Iterate pending chunk updates with protection against concurrent modification exceptions - java.util.Iterator iter = this.chunksToUpdateFutures.iterator(); - int expectedSize = this.chunksToUpdateFutures.size(); - do { - ChunkHolder playerchunk = iter.next(); - iter.remove(); - expectedSize--; - - playerchunk.updateFutures(chunkStorage, this.mainThreadExecutor); - - // Reset iterator if set was modified using add() - if (this.chunksToUpdateFutures.size() != expectedSize) { - expectedSize = this.chunksToUpdateFutures.size(); - iter = this.chunksToUpdateFutures.iterator(); - } - } while (iter.hasNext()); - // CraftBukkit end - - return true; - } else { - if (!this.ticketsToRelease.isEmpty()) { - LongIterator longiterator = this.ticketsToRelease.iterator(); - - while (longiterator.hasNext()) { - long j = longiterator.nextLong(); - - if (this.getTickets(j).stream().anyMatch((ticket) -> { - return ticket.getType() == TicketType.PLAYER; - })) { - ChunkHolder playerchunk = chunkStorage.getUpdatingChunkIfPresent(j); - - if (playerchunk == null) { - throw new IllegalStateException(); - } - - CompletableFuture> completablefuture = playerchunk.getEntityTickingChunkFuture(); - - completablefuture.thenAccept((chunkresult) -> { - this.mainThreadExecutor.execute(() -> { - this.ticketThrottlerReleaser.tell(ChunkTaskPriorityQueueSorter.release(() -> { - }, j, false)); - }); - }); - } - } - - this.ticketsToRelease.clear(); - } - - return flag; - } + return this.getChunkHolderManager().processTicketUpdates(); // Paper - rewrite chunk system } boolean addTicket(long i, Ticket ticket) { // CraftBukkit - void -> boolean - SortedArraySet> arraysetsorted = this.getTickets(i); - int j = DistanceManager.getTicketLevelAt(arraysetsorted); - Ticket ticket1 = (Ticket) arraysetsorted.addOrGet(ticket); - - ticket1.setCreatedTick(this.ticketTickCounter); - if (ticket.getTicketLevel() < j) { - this.ticketTracker.update(i, ticket.getTicketLevel(), true); - } - - return ticket == ticket1; // CraftBukkit + org.spigotmc.AsyncCatcher.catchOp("ChunkMapDistance::addTicket"); // Paper + return this.getChunkHolderManager().addTicketAtLevel((TicketType)ticket.getType(), i, ticket.getTicketLevel(), ticket.key); // Paper - rewrite chunk system } boolean removeTicket(long i, Ticket ticket) { // CraftBukkit - void -> boolean - SortedArraySet> arraysetsorted = this.getTickets(i); - - boolean removed = false; // CraftBukkit - if (arraysetsorted.remove(ticket)) { - removed = true; // CraftBukkit - } - - if (arraysetsorted.isEmpty()) { - this.tickets.remove(i); - } - - this.ticketTracker.update(i, DistanceManager.getTicketLevelAt(arraysetsorted), false); - return removed; // CraftBukkit + org.spigotmc.AsyncCatcher.catchOp("ChunkMapDistance::removeTicket"); // Paper + return this.getChunkHolderManager().removeTicketAtLevel((TicketType)ticket.getType(), i, ticket.getTicketLevel(), ticket.key); // Paper - rewrite chunk system } public void addTicket(TicketType type, ChunkPos pos, int level, T argument) { - this.addTicket(pos.toLong(), new Ticket<>(type, level, argument)); + this.getChunkHolderManager().addTicketAtLevel(type, pos, level, argument); // Paper - rewrite chunk system } public void removeTicket(TicketType type, ChunkPos pos, int level, T argument) { - Ticket ticket = new Ticket<>(type, level, argument); - - this.removeTicket(pos.toLong(), ticket); + this.getChunkHolderManager().removeTicketAtLevel(type, pos, level, argument); // Paper - rewrite chunk system } public void addRegionTicket(TicketType type, ChunkPos pos, int radius, T argument) { @@ -222,13 +102,7 @@ public abstract class DistanceManager { } public boolean addRegionTicketAtDistance(TicketType tickettype, ChunkPos chunkcoordintpair, int i, T t0) { - // CraftBukkit end - Ticket ticket = new Ticket<>(tickettype, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); - long j = chunkcoordintpair.toLong(); - - boolean added = this.addTicket(j, ticket); // CraftBukkit - this.tickingTicketsTracker.addTicket(j, ticket); - return added; // CraftBukkit + return this.getChunkHolderManager().addTicketAtLevel(tickettype, chunkcoordintpair, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); // Paper - rewrite chunk system } public void removeRegionTicket(TicketType type, ChunkPos pos, int radius, T argument) { @@ -237,31 +111,21 @@ public abstract class DistanceManager { } public boolean removeRegionTicketAtDistance(TicketType tickettype, ChunkPos chunkcoordintpair, int i, T t0) { - // CraftBukkit end - Ticket ticket = new Ticket<>(tickettype, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); - long j = chunkcoordintpair.toLong(); - - boolean removed = this.removeTicket(j, ticket); // CraftBukkit - this.tickingTicketsTracker.removeTicket(j, ticket); - return removed; // CraftBukkit + return this.getChunkHolderManager().removeTicketAtLevel(tickettype, chunkcoordintpair, ChunkLevel.byStatus(FullChunkStatus.FULL) - i, t0); // Paper - rewrite chunk system } - private SortedArraySet> getTickets(long position) { - return (SortedArraySet) this.tickets.computeIfAbsent(position, (j) -> { - return SortedArraySet.create(4); - }); - } + // Paper - rewrite chunk system protected void updateChunkForced(ChunkPos pos, boolean forced) { - Ticket ticket = new Ticket<>(TicketType.FORCED, ChunkMap.FORCED_TICKET_LEVEL, pos); + Ticket ticket = new Ticket<>(TicketType.FORCED, ChunkMap.FORCED_TICKET_LEVEL, pos, 0L); // Paper - rewrite chunk system long i = pos.toLong(); if (forced) { this.addTicket(i, ticket); - this.tickingTicketsTracker.addTicket(i, ticket); + //this.tickingTicketsTracker.addTicket(i, ticket); // Paper - no longer used } else { this.removeTicket(i, ticket); - this.tickingTicketsTracker.removeTicket(i, ticket); + //this.tickingTicketsTracker.removeTicket(i, ticket); // Paper - no longer used } } @@ -270,12 +134,10 @@ public abstract class DistanceManager { ChunkPos chunkcoordintpair = pos.chunk(); long i = chunkcoordintpair.toLong(); - ((ObjectSet) this.playersPerChunk.computeIfAbsent(i, (j) -> { - return new ObjectOpenHashSet(); - })).add(player); + // Paper - no longer used this.naturalSpawnChunkCounter.update(i, 0, true); - this.playerTicketManager.update(i, 0, true); - this.tickingTicketsTracker.addTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); + //this.playerTicketManager.update(i, 0, true); // Paper - no longer used + //this.tickingTicketsTracker.addTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); // Paper - no longer used } public void removePlayer(SectionPos pos, ServerPlayer player) { @@ -288,40 +150,44 @@ public abstract class DistanceManager { if (objectset == null || objectset.isEmpty()) { // Paper this.playersPerChunk.remove(i); this.naturalSpawnChunkCounter.update(i, Integer.MAX_VALUE, false); - this.playerTicketManager.update(i, Integer.MAX_VALUE, false); - this.tickingTicketsTracker.removeTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); + //this.playerTicketManager.update(i, Integer.MAX_VALUE, false); // Paper - no longer used + //this.tickingTicketsTracker.removeTicket(TicketType.PLAYER, chunkcoordintpair, this.getPlayerTicketLevel(), chunkcoordintpair); // Paper - no longer used } } - private int getPlayerTicketLevel() { - return Math.max(0, ChunkLevel.byStatus(FullChunkStatus.ENTITY_TICKING) - this.simulationDistance); - } + // Paper - rewrite chunk system public boolean inEntityTickingRange(long chunkPos) { - return ChunkLevel.isEntityTicking(this.tickingTicketsTracker.getLevel(chunkPos)); + // Paper start - replace player chunk loader system + ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(chunkPos); + return holder != null && holder.isEntityTickingReady(); + // Paper end - replace player chunk loader system } public boolean inBlockTickingRange(long chunkPos) { - return ChunkLevel.isBlockTicking(this.tickingTicketsTracker.getLevel(chunkPos)); + // Paper start - replace player chunk loader system + ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(chunkPos); + return holder != null && holder.isTickingReady(); + // Paper end - replace player chunk loader system } protected String getTicketDebugString(long pos) { - SortedArraySet> arraysetsorted = (SortedArraySet) this.tickets.get(pos); - - return arraysetsorted != null && !arraysetsorted.isEmpty() ? ((Ticket) arraysetsorted.first()).toString() : "no_ticket"; + return this.getChunkHolderManager().getTicketDebugString(pos); // Paper - rewrite chunk system } protected void updatePlayerTickets(int viewDistance) { - this.playerTicketManager.updateViewDistance(viewDistance); + this.chunkMap.setServerViewDistance(viewDistance); // Paper - route to player chunk manager } - public void updateSimulationDistance(int simulationDistance) { - if (simulationDistance != this.simulationDistance) { - this.simulationDistance = simulationDistance; - this.tickingTicketsTracker.replacePlayerTicketsLevel(this.getPlayerTicketLevel()); - } + // Paper start + public int getSimulationDistance() { + return this.chunkMap.level.playerChunkLoader.getAPITickDistance(); + } + // Paper end + public void updateSimulationDistance(int simulationDistance) { + this.chunkMap.level.playerChunkLoader.setTickDistance(simulationDistance); // Paper - route to player chunk manager } public int getNaturalSpawnChunkCount() { @@ -335,103 +201,26 @@ public abstract class DistanceManager { } public String getDebugStatus() { - return this.ticketThrottler.getDebugStatus(); + return "No DistanceManager stats available"; // Paper - rewrite chunk system } - private void dumpTickets(String path) { - try { - FileOutputStream fileoutputstream = new FileOutputStream(new File(path)); - - try { - ObjectIterator objectiterator = this.tickets.long2ObjectEntrySet().iterator(); - - while (objectiterator.hasNext()) { - Entry>> entry = (Entry) objectiterator.next(); - ChunkPos chunkcoordintpair = new ChunkPos(entry.getLongKey()); - Iterator iterator = ((SortedArraySet) entry.getValue()).iterator(); - - while (iterator.hasNext()) { - Ticket ticket = (Ticket) iterator.next(); - - fileoutputstream.write((chunkcoordintpair.x + "\t" + chunkcoordintpair.z + "\t" + String.valueOf(ticket.getType()) + "\t" + ticket.getTicketLevel() + "\t\n").getBytes(StandardCharsets.UTF_8)); - } - } - } catch (Throwable throwable) { - try { - fileoutputstream.close(); - } catch (Throwable throwable1) { - throwable.addSuppressed(throwable1); - } - - throw throwable; - } - - fileoutputstream.close(); - } catch (IOException ioexception) { - DistanceManager.LOGGER.error("Failed to dump tickets to {}", path, ioexception); - } - - } - - @VisibleForTesting - TickingTracker tickingTracker() { - return this.tickingTicketsTracker; - } + // Paper - rewrite chunk system public void removeTicketsOnClosing() { - ImmutableSet> immutableset = ImmutableSet.of(TicketType.UNKNOWN, TicketType.POST_TELEPORT, TicketType.LIGHT, TicketType.FUTURE_AWAIT, TicketType.CHUNK_RELIGHT, ca.spottedleaf.starlight.common.light.StarLightInterface.CHUNK_WORK_TICKET); // Paper - add additional tickets to preserve - ObjectIterator>>> objectiterator = this.tickets.long2ObjectEntrySet().fastIterator(); - - while (objectiterator.hasNext()) { - Entry>> entry = (Entry) objectiterator.next(); - Iterator> iterator = ((SortedArraySet) entry.getValue()).iterator(); - boolean flag = false; - - while (iterator.hasNext()) { - Ticket ticket = (Ticket) iterator.next(); - - if (!immutableset.contains(ticket.getType())) { - iterator.remove(); - flag = true; - this.tickingTicketsTracker.removeTicket(entry.getLongKey(), ticket); - } - } - - if (flag) { - this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt((SortedArraySet) entry.getValue()), false); - } - - if (((SortedArraySet) entry.getValue()).isEmpty()) { - objectiterator.remove(); - } - } - + // Paper - rewrite chunk system - this stupid hack ain't needed anymore } public boolean hasTickets() { - return !this.tickets.isEmpty(); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } // CraftBukkit start public void removeAllTicketsFor(TicketType ticketType, int ticketLevel, T ticketIdentifier) { - Ticket target = new Ticket<>(ticketType, ticketLevel, ticketIdentifier); - - for (java.util.Iterator>>> iterator = this.tickets.long2ObjectEntrySet().fastIterator(); iterator.hasNext();) { - Entry>> entry = iterator.next(); - SortedArraySet> tickets = entry.getValue(); - if (tickets.remove(target)) { - // copied from removeTicket - this.ticketTracker.update(entry.getLongKey(), DistanceManager.getTicketLevelAt(tickets), false); - - // can't use entry after it's removed - if (tickets.isEmpty()) { - iterator.remove(); - } - } - } + this.getChunkHolderManager().removeAllTicketsFor(ticketType, ticketLevel, ticketIdentifier); // Paper - rewrite chunk system } // CraftBukkit end + /* Paper - rewrite chunk system private class ChunkTicketTracker extends ChunkTracker { private static final int MAX_LEVEL = ChunkLevel.MAX_LEVEL + 1; @@ -478,6 +267,7 @@ public abstract class DistanceManager { return this.runUpdates(distance); } } + */ // Paper - rewrite chunk system private class FixedPlayerDistanceChunkTracker extends ChunkTracker { @@ -557,6 +347,7 @@ public abstract class DistanceManager { } } + /* Paper - rewrite chunk system private class PlayerTicketTracker extends DistanceManager.FixedPlayerDistanceChunkTracker { private int viewDistance = 0; @@ -652,4 +443,5 @@ public abstract class DistanceManager { return distance <= this.viewDistance; } } + */ // Paper - rewrite chunk system } diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java index 2d9d4d06b75873f888ef4d8f5779a52706f821a8..f74efe41cd0da2f9749fc96fb9e0f7cf237ad1c6 100644 --- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java +++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java @@ -71,7 +71,7 @@ public class ServerChunkCache extends ChunkSource { public final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet entityTickingChunks = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(4096, 0.75f, 4096, 0.15, true); final com.destroystokyo.paper.util.concurrent.WeakSeqLock loadedChunkMapSeqLock = new com.destroystokyo.paper.util.concurrent.WeakSeqLock(); final it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap loadedChunkMap = new it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap<>(8192, 0.5f); - long chunkFutureAwaitCounter; + final java.util.concurrent.atomic.AtomicLong chunkFutureAwaitCounter = new java.util.concurrent.atomic.AtomicLong(); // Paper - chunk system rewrite private final LevelChunk[] lastLoadedChunks = new LevelChunk[4 * 4]; // Paper end @@ -195,7 +195,7 @@ public class ServerChunkCache extends ChunkSource { public LevelChunk getChunkAtIfLoadedImmediately(int x, int z) { long k = ChunkPos.asLong(x, z); - if (Thread.currentThread() == this.mainThread) { + if (io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system return this.getChunkAtIfLoadedMainThread(x, z); } @@ -247,7 +247,8 @@ public class ServerChunkCache extends ChunkSource { @Nullable @Override public ChunkAccess getChunk(int x, int z, ChunkStatus leastStatus, boolean create) { - if (Thread.currentThread() != this.mainThread) { + final int x1 = x; final int z1 = z; // Paper - conflict on variable change + if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system return (ChunkAccess) CompletableFuture.supplyAsync(() -> { return this.getChunk(x, z, leastStatus, create); }, this.mainThreadProcessor).join(); @@ -263,15 +264,7 @@ public class ServerChunkCache extends ChunkSource { gameprofilerfiller.incrementCounter("getChunk"); long k = ChunkPos.asLong(x, z); - for (int l = 0; l < 4; ++l) { - if (k == this.lastChunkPos[l] && leastStatus == this.lastChunkStatus[l]) { - ChunkAccess ichunkaccess = this.lastChunk[l]; - - if (ichunkaccess != null) { // CraftBukkit - the chunk can become accessible in the meantime TODO for non-null chunks it might also make sense to check that the chunk's state hasn't changed in the meantime - return ichunkaccess; - } - } - } + // Paper - rewrite chunk system - there are no correct callbacks to remove items from cache in the new chunk system gameprofilerfiller.incrementCounter("getChunkCacheMiss"); CompletableFuture> completablefuture = this.getChunkFutureMainThread(x, z, leastStatus, create); @@ -279,9 +272,11 @@ public class ServerChunkCache extends ChunkSource { Objects.requireNonNull(completablefuture); if (!completablefuture.isDone()) { // Paper + io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.pushChunkWait(this.level, x1, z1); // Paper - rewrite chunk system com.destroystokyo.paper.io.SyncLoadFinder.logSyncLoad(this.level, x, z); // Paper - Add debug for sync chunk loads this.level.timings.syncChunkLoad.startTiming(); // Paper chunkproviderserver_b.managedBlock(completablefuture::isDone); + io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.popChunkWait(); // Paper - rewrite chunk system this.level.timings.syncChunkLoad.stopTiming(); // Paper } // Paper ChunkResult chunkresult = (ChunkResult) completablefuture.join(); @@ -299,7 +294,7 @@ public class ServerChunkCache extends ChunkSource { @Nullable @Override public LevelChunk getChunkNow(int chunkX, int chunkZ) { - if (Thread.currentThread() != this.mainThread) { + if (!io.papermc.paper.util.TickThread.isTickThread()) { // Paper - rewrite chunk system return null; } else { return this.getChunkAtIfLoadedMainThread(chunkX, chunkZ); // Paper - Perf: Optimise getChunkAt calls for loaded chunks @@ -313,7 +308,7 @@ public class ServerChunkCache extends ChunkSource { } public CompletableFuture> getChunkFuture(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) { - boolean flag1 = Thread.currentThread() == this.mainThread; + boolean flag1 = io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system CompletableFuture completablefuture; if (flag1) { @@ -333,48 +328,54 @@ public class ServerChunkCache extends ChunkSource { return completablefuture; } + private CompletableFuture> getChunkFutureMainThread(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create) { - ChunkPos chunkcoordintpair = new ChunkPos(chunkX, chunkZ); - long k = chunkcoordintpair.toLong(); - int l = ChunkLevel.byStatus(leastStatus); - ChunkHolder playerchunk = this.getVisibleChunkIfPresent(k); + // Paper start - add isUrgent - old sig left in place for dirty nms plugins + return getChunkFutureMainThread(chunkX, chunkZ, leastStatus, create, false); + } + private CompletableFuture> getChunkFutureMainThread(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create, boolean isUrgent) { + // Paper start - rewrite chunk system + io.papermc.paper.util.TickThread.ensureTickThread(this.level, chunkX, chunkZ, "Scheduling chunk load off-main"); + int minLevel = ChunkLevel.byStatus(leastStatus); + io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.level.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkX, chunkZ); - // CraftBukkit start - don't add new ticket for currently unloading chunk - boolean currentlyUnloading = false; - if (playerchunk != null) { - FullChunkStatus oldChunkState = ChunkLevel.fullStatus(playerchunk.oldTicketLevel); - FullChunkStatus currentChunkState = ChunkLevel.fullStatus(playerchunk.getTicketLevel()); - currentlyUnloading = (oldChunkState.isOrAfter(FullChunkStatus.FULL) && !currentChunkState.isOrAfter(FullChunkStatus.FULL)); + boolean needsFullScheduling = leastStatus == ChunkStatus.FULL && (chunkHolder == null || !chunkHolder.getChunkStatus().isOrAfter(FullChunkStatus.FULL)); + + if ((chunkHolder == null || chunkHolder.getTicketLevel() > minLevel || needsFullScheduling) && !create) { + return ChunkHolder.UNLOADED_CHUNK_FUTURE; } - if (create && !currentlyUnloading) { - // CraftBukkit end - this.distanceManager.addTicket(TicketType.UNKNOWN, chunkcoordintpair, l, chunkcoordintpair); - if (this.chunkAbsent(playerchunk, l)) { - ProfilerFiller gameprofilerfiller = this.level.getProfiler(); - - gameprofilerfiller.push("chunkLoad"); - this.runDistanceManagerUpdates(); - playerchunk = this.getVisibleChunkIfPresent(k); - gameprofilerfiller.pop(); - if (this.chunkAbsent(playerchunk, l)) { - throw (IllegalStateException) Util.pauseInIde(new IllegalStateException("No chunk holder after ticket has been added")); + + io.papermc.paper.chunk.system.scheduling.NewChunkHolder.ChunkCompletion chunkCompletion = chunkHolder == null ? null : chunkHolder.getLastChunkCompletion(); + if (needsFullScheduling || chunkCompletion == null || !chunkCompletion.genStatus().isOrAfter(leastStatus)) { + // schedule + CompletableFuture> ret = new CompletableFuture<>(); + Consumer complete = (ChunkAccess chunk) -> { + if (chunk == null) { + ret.complete(ChunkResult.error("Unexpected chunk unload")); + } else { + ret.complete(ChunkResult.of(chunk)); } - } - } + }; - return this.chunkAbsent(playerchunk, l) ? ChunkHolder.UNLOADED_CHUNK_FUTURE : playerchunk.getOrScheduleFuture(leastStatus, this.chunkMap); - } + this.level.chunkTaskScheduler.scheduleChunkLoad( + chunkX, chunkZ, leastStatus, true, + isUrgent ? ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.BLOCKING : ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.NORMAL, + complete + ); - private boolean chunkAbsent(@Nullable ChunkHolder holder, int maxLevel) { - return holder == null || holder.oldTicketLevel > maxLevel; // CraftBukkit using oldTicketLevel for isLoaded checks + return ret; + } else { + // can return now + return CompletableFuture.completedFuture(ChunkResult.of(chunkCompletion.chunk())); + } + // Paper end - rewrite chunk system } + // Paper - rewrite chunk system + @Override public boolean hasChunk(int x, int z) { - ChunkHolder playerchunk = this.getVisibleChunkIfPresent((new ChunkPos(x, z)).toLong()); - int k = ChunkLevel.byStatus(ChunkStatus.FULL); - - return !this.chunkAbsent(playerchunk, k); + return this.getChunkAtIfLoadedImmediately(x, z) != null; // Paper - rewrite chunk system } @Nullable @@ -386,22 +387,13 @@ public class ServerChunkCache extends ChunkSource { if (playerchunk == null) { return null; } else { - int l = ServerChunkCache.CHUNK_STATUSES.size() - 1; - - while (true) { - ChunkStatus chunkstatus = (ChunkStatus) ServerChunkCache.CHUNK_STATUSES.get(l); - ChunkAccess ichunkaccess = (ChunkAccess) ((ChunkResult) playerchunk.getFutureIfPresentUnchecked(chunkstatus).getNow(ChunkHolder.UNLOADED_CHUNK)).orElse((Object) null); - - if (ichunkaccess != null) { - return ichunkaccess; - } - - if (chunkstatus == ChunkStatus.INITIALIZE_LIGHT.getParent()) { - return null; - } - - --l; + // Paper start - rewrite chunk system + ChunkStatus status = playerchunk.getChunkHolderStatus(); + if (status != null && !status.isOrAfter(ChunkStatus.LIGHT.getParent())) { + return null; } + return playerchunk.getAvailableChunkNow(); + // Paper end - rewrite chunk system } } @@ -415,15 +407,7 @@ public class ServerChunkCache extends ChunkSource { } public boolean runDistanceManagerUpdates() { // Paper - public - boolean flag = this.distanceManager.runAllUpdates(this.chunkMap); - boolean flag1 = this.chunkMap.promoteChunkMap(); - - if (!flag && !flag1) { - return false; - } else { - this.clearCache(); - return true; - } + return this.level.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); // Paper - rewrite chunk system } // Paper start @@ -433,9 +417,10 @@ public class ServerChunkCache extends ChunkSource { // Paper end public boolean isPositionTicking(long pos) { - ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos); - - return playerchunk == null ? false : (!this.level.shouldTickBlocksAt(pos) ? false : ((ChunkResult) playerchunk.getTickingChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).isSuccess()); + // Paper start - replace player chunk loader system + ChunkHolder holder = this.chunkMap.getVisibleChunkIfPresent(pos); + return holder != null && holder.isTickingReady(); + // Paper end - replace player chunk loader system } public void save(boolean flush) { @@ -451,17 +436,13 @@ public class ServerChunkCache extends ChunkSource { this.close(true); } - public void close(boolean save) throws IOException { - if (save) { - this.save(true); - } - // CraftBukkit end - this.lightEngine.close(); - this.chunkMap.close(); + public void close(boolean save) { // Paper - rewrite chunk system + this.level.chunkTaskScheduler.chunkHolderManager.close(save, true); // Paper - rewrite chunk system } // CraftBukkit start - modelled on below public void purgeUnload() { + if (true) return; // Paper - tickets will be removed later, this behavior isn't really well accounted for by the chunk system this.level.getProfiler().push("purge"); this.distanceManager.purgeStaleTickets(); this.runDistanceManagerUpdates(); @@ -485,6 +466,7 @@ public class ServerChunkCache extends ChunkSource { this.level.getProfiler().popPush("chunks"); if (tickChunks) { this.level.timings.chunks.startTiming(); // Paper - timings + this.chunkMap.level.playerChunkLoader.tick(); // Paper - replace player chunk loader - this is mostly required to account for view distance changes this.tickChunks(); this.level.timings.chunks.stopTiming(); // Paper - timings this.chunkMap.tick(); @@ -587,7 +569,12 @@ public class ServerChunkCache extends ChunkSource { ChunkHolder playerchunk = this.getVisibleChunkIfPresent(pos); if (playerchunk != null) { - ((ChunkResult) playerchunk.getFullChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).ifSuccess(chunkConsumer); + // Paper start - rewrite chunk system + LevelChunk chunk = playerchunk.getFullChunkNow(); + if (chunk != null) { + chunkConsumer.accept(chunk); + } + // Paper end - rewrite chunk system } } @@ -753,17 +740,10 @@ public class ServerChunkCache extends ChunkSource { @Override // CraftBukkit start - process pending Chunk loadCallback() and unloadCallback() after each run task public boolean pollTask() { - try { if (ServerChunkCache.this.runDistanceManagerUpdates()) { return true; - } else { - ServerChunkCache.this.lightEngine.tryScheduleUpdate(); - return super.pollTask(); } - } finally { - ServerChunkCache.this.chunkMap.callbackExecutor.run(); - } - // CraftBukkit end + return super.pollTask() | ServerChunkCache.this.level.chunkTaskScheduler.executeMainThreadTask(); // Paper - rewrite chunk system } } diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java index 7dfbb3dd6100180abd2ebab4d1e9e34928666f9e..4dc5802d203d202081ae034bbf8efd5e7983f360 100644 --- a/src/main/java/net/minecraft/server/level/ServerLevel.java +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java @@ -199,7 +199,7 @@ public class ServerLevel extends Level implements WorldGenLevel { public final PrimaryLevelData serverLevelData; // CraftBukkit - type private int lastSpawnChunkRadius; final EntityTickList entityTickList; - public final PersistentEntitySectionManager entityManager; + //public final PersistentEntitySectionManager entityManager; // Paper - rewrite chunk system private final GameEventDispatcher gameEventDispatcher; public boolean noSave; private final SleepStatus sleepStatus; @@ -268,50 +268,65 @@ public class ServerLevel extends Level implements WorldGenLevel { return true; } - public final void loadChunksForMoveAsync(AABB axisalignedbb, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, - java.util.function.Consumer> onLoad) { - if (Thread.currentThread() != this.thread) { - this.getChunkSource().mainThreadProcessor.execute(() -> { - this.loadChunksForMoveAsync(axisalignedbb, priority, onLoad); - }); - return; - } + public final void loadChunksAsync(BlockPos pos, int radiusBlocks, + ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, + java.util.function.Consumer> onLoad) { + loadChunksAsync( + (pos.getX() - radiusBlocks) >> 4, + (pos.getX() + radiusBlocks) >> 4, + (pos.getZ() - radiusBlocks) >> 4, + (pos.getZ() + radiusBlocks) >> 4, + priority, onLoad + ); + } + + public final void loadChunksAsync(BlockPos pos, int radiusBlocks, + net.minecraft.world.level.chunk.status.ChunkStatus chunkStatus, + ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, + java.util.function.Consumer> onLoad) { + loadChunksAsync( + (pos.getX() - radiusBlocks) >> 4, + (pos.getX() + radiusBlocks) >> 4, + (pos.getZ() - radiusBlocks) >> 4, + (pos.getZ() + radiusBlocks) >> 4, + chunkStatus, priority, onLoad + ); + } + + public final void loadChunksAsync(int minChunkX, int maxChunkX, int minChunkZ, int maxChunkZ, + ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, + java.util.function.Consumer> onLoad) { + this.loadChunksAsync(minChunkX, maxChunkX, minChunkZ, maxChunkZ, net.minecraft.world.level.chunk.status.ChunkStatus.FULL, priority, onLoad); + } + + public final void loadChunksAsync(int minChunkX, int maxChunkX, int minChunkZ, int maxChunkZ, + net.minecraft.world.level.chunk.status.ChunkStatus chunkStatus, + ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, + java.util.function.Consumer> onLoad) { List ret = new java.util.ArrayList<>(); - it.unimi.dsi.fastutil.ints.IntArrayList ticketLevels = new it.unimi.dsi.fastutil.ints.IntArrayList(); - - int minBlockX = Mth.floor(axisalignedbb.minX - 1.0E-7D) - 3; - int maxBlockX = Mth.floor(axisalignedbb.maxX + 1.0E-7D) + 3; - - int minBlockZ = Mth.floor(axisalignedbb.minZ - 1.0E-7D) - 3; - int maxBlockZ = Mth.floor(axisalignedbb.maxZ + 1.0E-7D) + 3; - - int minChunkX = minBlockX >> 4; - int maxChunkX = maxBlockX >> 4; - - int minChunkZ = minBlockZ >> 4; - int maxChunkZ = maxBlockZ >> 4; ServerChunkCache chunkProvider = this.getChunkSource(); int requiredChunks = (maxChunkX - minChunkX + 1) * (maxChunkZ - minChunkZ + 1); - int[] loadedChunks = new int[1]; + java.util.concurrent.atomic.AtomicInteger loadedChunks = new java.util.concurrent.atomic.AtomicInteger(); - Long holderIdentifier = Long.valueOf(chunkProvider.chunkFutureAwaitCounter++); + Long holderIdentifier = Long.valueOf(chunkProvider.chunkFutureAwaitCounter.getAndIncrement()); + + int ticketLevel = 33 + net.minecraft.world.level.chunk.status.ChunkStatus.getDistance(chunkStatus); java.util.function.Consumer consumer = (net.minecraft.world.level.chunk.ChunkAccess chunk) -> { if (chunk != null) { - int ticketLevel = Math.max(33, chunkProvider.chunkMap.getUpdatingChunkIfPresent(chunk.getPos().toLong()).getTicketLevel()); + synchronized (ret) { ret.add(chunk); - ticketLevels.add(ticketLevel); + } chunkProvider.addTicketAtLevel(TicketType.FUTURE_AWAIT, chunk.getPos(), ticketLevel, holderIdentifier); } - if (++loadedChunks[0] == requiredChunks) { + if (loadedChunks.incrementAndGet() == requiredChunks) { try { onLoad.accept(java.util.Collections.unmodifiableList(ret)); } finally { for (int i = 0, len = ret.size(); i < len; ++i) { ChunkPos chunkPos = ret.get(i).getPos(); - int ticketLevel = ticketLevels.getInt(i); chunkProvider.addTicketAtLevel(TicketType.UNKNOWN, chunkPos, ticketLevel, chunkPos); chunkProvider.removeTicketAtLevel(TicketType.FUTURE_AWAIT, chunkPos, ticketLevel, holderIdentifier); @@ -323,12 +338,228 @@ public class ServerLevel extends Level implements WorldGenLevel { for (int cx = minChunkX; cx <= maxChunkX; ++cx) { for (int cz = minChunkZ; cz <= maxChunkZ; ++cz) { io.papermc.paper.chunk.system.ChunkSystem.scheduleChunkLoad( - this, cx, cz, net.minecraft.world.level.chunk.status.ChunkStatus.FULL, true, priority, consumer + this, cx, cz, chunkStatus, true, priority, consumer ); } } } - // Paper end + + public final void loadChunksForMoveAsync(AABB axisalignedbb, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority priority, + java.util.function.Consumer> onLoad) { + + int minBlockX = Mth.floor(axisalignedbb.minX - 1.0E-7D) - 3; + int maxBlockX = Mth.floor(axisalignedbb.maxX + 1.0E-7D) + 3; + + int minBlockZ = Mth.floor(axisalignedbb.minZ - 1.0E-7D) - 3; + int maxBlockZ = Mth.floor(axisalignedbb.maxZ + 1.0E-7D) + 3; + + int minChunkX = minBlockX >> 4; + int maxChunkX = maxBlockX >> 4; + + int minChunkZ = minBlockZ >> 4; + int maxChunkZ = maxBlockZ >> 4; + + this.loadChunksAsync(minChunkX, maxChunkX, minChunkZ, maxChunkZ, priority, onLoad); + } + + // Paper start - rewrite chunk system + public final io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler chunkTaskScheduler; + public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController chunkDataControllerNew + = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.CHUNK_DATA) { + + @Override + public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() { + return ServerLevel.this.getChunkSource().chunkMap.regionFileCache; + } + + @Override + public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { + ServerLevel.this.getChunkSource().chunkMap.write(new ChunkPos(chunkX, chunkZ), compound); + } + + @Override + public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException { + return ServerLevel.this.getChunkSource().chunkMap.readSync(new ChunkPos(chunkX, chunkZ)); + } + }; + public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController poiDataControllerNew + = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA) { + + @Override + public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() { + return ServerLevel.this.getChunkSource().chunkMap.getPoiManager(); + } + + @Override + public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { + ServerLevel.this.getChunkSource().chunkMap.getPoiManager().write(new ChunkPos(chunkX, chunkZ), compound); + } + + @Override + public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException { + return ServerLevel.this.getChunkSource().chunkMap.getPoiManager().read(new ChunkPos(chunkX, chunkZ)); + } + }; + public final io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController entityDataControllerNew + = new io.papermc.paper.chunk.system.io.RegionFileIOThread.ChunkDataController(io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA) { + + @Override + public net.minecraft.world.level.chunk.storage.RegionFileStorage getCache() { + return ServerLevel.this.entityStorage; + } + + @Override + public void writeData(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { + ServerLevel.this.writeEntityChunk(chunkX, chunkZ, compound); + } + + @Override + public net.minecraft.nbt.CompoundTag readData(int chunkX, int chunkZ) throws IOException { + return ServerLevel.this.readEntityChunk(chunkX, chunkZ); + } + }; + private final EntityRegionFileStorage entityStorage; + + private static final class EntityRegionFileStorage extends net.minecraft.world.level.chunk.storage.RegionFileStorage { + + public EntityRegionFileStorage(Path directory, boolean dsync) { + super(directory, dsync); + } + + protected void write(ChunkPos pos, net.minecraft.nbt.CompoundTag nbt) throws IOException { + ChunkPos nbtPos = nbt == null ? null : EntityStorage.readChunkPos(nbt); + if (nbtPos != null && !pos.equals(nbtPos)) { + throw new IllegalArgumentException( + "Entity chunk coordinate and serialized data do not have matching coordinates, trying to serialize coordinate " + pos.toString() + + " but compound says coordinate is " + nbtPos + " for world: " + this + ); + } + super.write(pos, nbt); + } + } + + private void writeEntityChunk(int chunkX, int chunkZ, net.minecraft.nbt.CompoundTag compound) throws IOException { + if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { + io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave( + this, chunkX, chunkZ, compound, + io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA); + return; + } + this.entityStorage.write(new ChunkPos(chunkX, chunkZ), compound); + } + + private net.minecraft.nbt.CompoundTag readEntityChunk(int chunkX, int chunkZ) throws IOException { + if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { + return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData( + this, chunkX, chunkZ, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.ENTITY_DATA, + io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread() + ); + } + return this.entityStorage.read(new ChunkPos(chunkX, chunkZ)); + } + + private final io.papermc.paper.chunk.system.entity.EntityLookup entityLookup; + public final io.papermc.paper.chunk.system.entity.EntityLookup getEntityLookup() { + return this.entityLookup; + } + + private final java.util.concurrent.atomic.AtomicLong nonFullSyncLoadIdGenerator = new java.util.concurrent.atomic.AtomicLong(); + + private ChunkAccess getIfAboveStatus(int chunkX, int chunkZ, net.minecraft.world.level.chunk.status.ChunkStatus status) { + io.papermc.paper.chunk.system.scheduling.NewChunkHolder loaded = + this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkX, chunkZ); + io.papermc.paper.chunk.system.scheduling.NewChunkHolder.ChunkCompletion loadedCompletion; + if (loaded != null && (loadedCompletion = loaded.getLastChunkCompletion()) != null && loadedCompletion.genStatus().isOrAfter(status)) { + return loadedCompletion.chunk(); + } + + return null; + } + + @Override + public ChunkAccess syncLoadNonFull(int chunkX, int chunkZ, net.minecraft.world.level.chunk.status.ChunkStatus status) { + if (status == null || status.isOrAfter(net.minecraft.world.level.chunk.status.ChunkStatus.FULL)) { + throw new IllegalArgumentException("Status: " + status); + } + ChunkAccess loaded = this.getIfAboveStatus(chunkX, chunkZ, status); + if (loaded != null) { + return loaded; + } + + Long ticketId = Long.valueOf(this.nonFullSyncLoadIdGenerator.getAndIncrement()); + int ticketLevel = 33 + net.minecraft.world.level.chunk.status.ChunkStatus.getDistance(status); + this.chunkTaskScheduler.chunkHolderManager.addTicketAtLevel( + TicketType.NON_FULL_SYNC_LOAD, chunkX, chunkZ, ticketLevel, ticketId + ); + this.chunkTaskScheduler.chunkHolderManager.processTicketUpdates(); + + this.chunkTaskScheduler.beginChunkLoadForNonFullSync(chunkX, chunkZ, status, ca.spottedleaf.concurrentutil.executor.standard.PrioritisedExecutor.Priority.BLOCKING); + + // we could do a simple spinwait here, since we do not need to process tasks while performing this load + // but we process tasks only because it's a better use of the time spent + this.chunkSource.mainThreadProcessor.managedBlock(() -> { + return ServerLevel.this.getIfAboveStatus(chunkX, chunkZ, status) != null; + }); + + loaded = ServerLevel.this.getIfAboveStatus(chunkX, chunkZ, status); + if (loaded == null) { + throw new IllegalStateException("Expected chunk to be loaded for status " + status); + } + + this.chunkTaskScheduler.chunkHolderManager.removeTicketAtLevel( + TicketType.NON_FULL_SYNC_LOAD, chunkX, chunkZ, ticketLevel, ticketId + ); + + return loaded; + } + + public final int getRegionChunkShift() { + // placeholder for folia + return io.papermc.paper.threadedregions.TickRegions.getRegionChunkShift(); + } + // Paper end - rewrite chunk system + + public final io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader playerChunkLoader = new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader(this); + private final java.util.concurrent.atomic.AtomicReference viewDistances = new java.util.concurrent.atomic.AtomicReference<>(new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances(-1, -1, -1)); + + public io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances getViewDistances() { + return this.viewDistances.get(); + } + + private void updateViewDistance(final java.util.function.Function update) { + for (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances curr = this.viewDistances.get();;) { + if (this.viewDistances.compareAndSet(curr, update.apply(curr))) { + return; + } + } + } + + public void setTickViewDistance(final int distance) { + if ((distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE)) { + throw new IllegalArgumentException("Tick view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE) + ", got: " + distance); + } + this.updateViewDistance((input) -> { + return input.setTickViewDistance(distance); + }); + } + + public void setLoadViewDistance(final int distance) { + if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { + throw new IllegalArgumentException("Load view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); + } + this.updateViewDistance((input) -> { + return input.setLoadViewDistance(distance); + }); + } + + public void setSendViewDistance(final int distance) { + if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { + throw new IllegalArgumentException("Send view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); + } + this.updateViewDistance((input) -> { + return input.setSendViewDistance(distance); + }); + } // Paper start - optimise getPlayerByUUID @Nullable @@ -382,16 +613,16 @@ public class ServerLevel extends Level implements WorldGenLevel { // CraftBukkit end boolean flag2 = minecraftserver.forceSynchronousWrites(); DataFixer datafixer = minecraftserver.getFixerUpper(); - EntityPersistentStorage entitypersistentstorage = new EntityStorage(new SimpleRegionStorage(new RegionStorageInfo(convertable_conversionsession.getLevelId(), resourcekey, "entities"), convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), datafixer, flag2, DataFixTypes.ENTITY_CHUNK), this, minecraftserver); + this.entityStorage = new EntityRegionFileStorage(convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), flag2); // Paper - rewrite chunk system // EntityPersistentStorage entitypersistentstorage = new EntityStorage(new SimpleRegionStorage(new RegionStorageInfo(convertable_conversionsession.getLevelId(), resourcekey, "entities"), convertable_conversionsession.getDimensionPath(resourcekey).resolve("entities"), datafixer, flag2, DataFixTypes.ENTITY_CHUNK), this, minecraftserver); - this.entityManager = new PersistentEntitySectionManager<>(Entity.class, new ServerLevel.EntityCallbacks(), entitypersistentstorage); + // this.entityManager = new PersistentEntitySectionManager<>(Entity.class, new ServerLevel.EntityCallbacks(), entitypersistentstorage, this.entitySliceManager); // Paper // Paper - rewrite chunk system StructureTemplateManager structuretemplatemanager = minecraftserver.getStructureManager(); int j = this.spigotConfig.viewDistance; // Spigot int k = this.spigotConfig.simulationDistance; // Spigot - PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; + //PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; // Paper - rewrite chunk system - Objects.requireNonNull(this.entityManager); - this.chunkSource = new ServerChunkCache(this, convertable_conversionsession, datafixer, structuretemplatemanager, executor, chunkgenerator, j, k, flag2, worldloadlistener, persistententitysectionmanager::updateChunkStatus, () -> { + //Objects.requireNonNull(this.entityManager); // Paper - rewrite chunk system + this.chunkSource = new ServerChunkCache(this, convertable_conversionsession, datafixer, structuretemplatemanager, executor, chunkgenerator, j, k, flag2, worldloadlistener, null, () -> { // Paper - rewrite chunk system return minecraftserver.overworld().getDataStorage(); }); this.chunkSource.getGeneratorState().ensureStructuresGenerated(); @@ -426,6 +657,9 @@ public class ServerLevel extends Level implements WorldGenLevel { return (RandomSequences) this.getDataStorage().computeIfAbsent(RandomSequences.factory(l), "random_sequences"); }); this.getCraftServer().addWorld(this.getWorld()); // CraftBukkit + + this.chunkTaskScheduler = new io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler(this, io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.workerThreads); // Paper - rewrite chunk system + this.entityLookup = new io.papermc.paper.chunk.system.entity.EntityLookup(this, new EntityCallbacks()); // Paper - rewrite chunk system } // Paper start @@ -558,7 +792,7 @@ public class ServerLevel extends Level implements WorldGenLevel { gameprofilerfiller.push("checkDespawn"); entity.checkDespawn(); gameprofilerfiller.pop(); - if (this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(entity.chunkPosition().toLong())) { + if (true || this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(entity.chunkPosition().toLong())) { // Paper - now always true if in the ticking list Entity entity1 = entity.getVehicle(); if (entity1 != null) { @@ -583,13 +817,16 @@ public class ServerLevel extends Level implements WorldGenLevel { } gameprofilerfiller.push("entityManagement"); - this.entityManager.tick(); + //this.entityManager.tick(); // Paper - rewrite chunk system gameprofilerfiller.pop(); } @Override public boolean shouldTickBlocksAt(long chunkPos) { - return this.chunkSource.chunkMap.getDistanceManager().inBlockTickingRange(chunkPos); + // Paper start - replace player chunk loader system + ChunkHolder holder = this.chunkSource.chunkMap.getVisibleChunkIfPresent(chunkPos); + return holder != null && holder.isTickingReady(); + // Paper end - replace player chunk loader system } protected void tickTime() { @@ -1066,6 +1303,11 @@ public class ServerLevel extends Level implements WorldGenLevel { } public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled) { + // Paper start - rewrite chunk system - add close param + this.save(progressListener, flush, savingDisabled, false); + } + public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled, boolean close) { + // Paper end - rewrite chunk system - add close param ServerChunkCache chunkproviderserver = this.getChunkSource(); if (!savingDisabled) { @@ -1081,16 +1323,13 @@ public class ServerLevel extends Level implements WorldGenLevel { } timings.worldSaveChunks.startTiming(); // Paper - chunkproviderserver.save(flush); + if (!close) chunkproviderserver.save(flush); // Paper - rewrite chunk system + if (close) chunkproviderserver.close(true); // Paper - rewrite chunk system timings.worldSaveChunks.stopTiming(); // Paper }// Paper - if (flush) { - this.entityManager.saveAll(); - } else { - this.entityManager.autoSave(); - } + // Paper - rewrite chunk system - entity saving moved into ChunkHolder - } + } else if (close) { chunkproviderserver.close(false); } // Paper - rewrite chunk system // CraftBukkit start - moved from MinecraftServer.saveChunks ServerLevel worldserver1 = this; @@ -1226,7 +1465,7 @@ public class ServerLevel extends Level implements WorldGenLevel { this.removePlayerImmediately((ServerPlayer) entity, Entity.RemovalReason.DISCARDED); } - this.entityManager.addNewEntity(player); + this.entityLookup.addNewEntity(player); // Paper - rewite chunk system } // CraftBukkit start @@ -1257,7 +1496,7 @@ public class ServerLevel extends Level implements WorldGenLevel { } // CraftBukkit end - return this.entityManager.addNewEntity(entity); + return this.entityLookup.addNewEntity(entity); // Paper - rewrite chunk system } } @@ -1269,10 +1508,10 @@ public class ServerLevel extends Level implements WorldGenLevel { public boolean tryAddFreshEntityWithPassengers(Entity entity, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason reason) { // CraftBukkit end Stream stream = entity.getSelfAndPassengers().map(Entity::getUUID); // CraftBukkit - decompile error - PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; + //PersistentEntitySectionManager persistententitysectionmanager = this.entityManager; // Paper - rewrite chunk system - Objects.requireNonNull(this.entityManager); - if (stream.anyMatch(persistententitysectionmanager::isLoaded)) { + //Objects.requireNonNull(this.entityManager); // Paper - rewrite chunk system + if (stream.anyMatch(this.entityLookup::hasEntity)) { // Paper - rewrite chunk system return false; } else { this.addFreshEntityWithPassengers(entity, reason); // CraftBukkit @@ -1858,7 +2097,7 @@ public class ServerLevel extends Level implements WorldGenLevel { } } - bufferedwriter.write(String.format(Locale.ROOT, "entities: %s\n", this.entityManager.gatherStats())); + bufferedwriter.write(String.format(Locale.ROOT, "entities: %s\n", this.entityLookup.getDebugInfo())); // Paper - rewrite chunk system bufferedwriter.write(String.format(Locale.ROOT, "block_entity_tickers: %d\n", this.blockEntityTickers.size())); bufferedwriter.write(String.format(Locale.ROOT, "block_ticks: %d\n", this.getBlockTicks().count())); bufferedwriter.write(String.format(Locale.ROOT, "fluid_ticks: %d\n", this.getFluidTicks().count())); @@ -1907,7 +2146,7 @@ public class ServerLevel extends Level implements WorldGenLevel { BufferedWriter bufferedwriter2 = Files.newBufferedWriter(path1); try { - playerchunkmap.dumpChunks(bufferedwriter2); + //playerchunkmap.dumpChunks(bufferedwriter2); // Paper - rewrite chunk system } catch (Throwable throwable4) { if (bufferedwriter2 != null) { try { @@ -1928,7 +2167,7 @@ public class ServerLevel extends Level implements WorldGenLevel { BufferedWriter bufferedwriter3 = Files.newBufferedWriter(path2); try { - this.entityManager.dumpSections(bufferedwriter3); + //this.entityManager.dumpSections(bufferedwriter3); // Paper - rewrite chunk system } catch (Throwable throwable6) { if (bufferedwriter3 != null) { try { @@ -2070,7 +2309,7 @@ public class ServerLevel extends Level implements WorldGenLevel { @VisibleForTesting public String getWatchdogStats() { - return String.format(Locale.ROOT, "players: %s, entities: %s [%s], block_entities: %d [%s], block_ticks: %d, fluid_ticks: %d, chunk_source: %s", this.players.size(), this.entityManager.gatherStats(), ServerLevel.getTypeCount(this.entityManager.getEntityGetter().getAll(), (entity) -> { + return String.format(Locale.ROOT, "players: %s, entities: %s [%s], block_entities: %d [%s], block_ticks: %d, fluid_ticks: %d, chunk_source: %s", this.players.size(), this.entityLookup.getDebugInfo(), ServerLevel.getTypeCount(this.entityLookup.getAll(), (entity) -> { // Paper - rewrite chunk system return BuiltInRegistries.ENTITY_TYPE.getKey(entity.getType()).toString(); }), this.blockEntityTickers.size(), ServerLevel.getTypeCount(this.blockEntityTickers, TickingBlockEntity::getType), this.getBlockTicks().count(), this.getFluidTicks().count(), this.gatherChunkSourceStats()); } @@ -2130,15 +2369,15 @@ public class ServerLevel extends Level implements WorldGenLevel { @Override public LevelEntityGetter getEntities() { org.spigotmc.AsyncCatcher.catchOp("Chunk getEntities call"); // Spigot - return this.entityManager.getEntityGetter(); + return this.entityLookup; // Paper - rewrite chunk system } - public void addLegacyChunkEntities(Stream entities) { - this.entityManager.addLegacyChunkEntities(entities); + public void addLegacyChunkEntities(Stream entities, ChunkPos forChunk) { // Paper - rewrite chunk system + this.entityLookup.addLegacyChunkEntities(entities.toList(), forChunk); // Paper - rewrite chunk system } - public void addWorldGenChunkEntities(Stream entities) { - this.entityManager.addWorldGenChunkEntities(entities); + public void addWorldGenChunkEntities(Stream entities, ChunkPos forChunk) { // Paper - rewrite chunk system + this.entityLookup.addWorldGenChunkEntities(entities.toList(), forChunk); // Paper - rewrite chunk system } public void startTickingChunk(LevelChunk chunk) { @@ -2158,34 +2397,49 @@ public class ServerLevel extends Level implements WorldGenLevel { @Override public void close() throws IOException { super.close(); - this.entityManager.close(); + //this.entityManager.close(); // Paper - rewrite chunk system } @Override public String gatherChunkSourceStats() { String s = this.chunkSource.gatherStats(); - return "Chunks[S] W: " + s + " E: " + this.entityManager.gatherStats(); + return "Chunks[S] W: " + s + " E: " + this.entityLookup.getDebugInfo(); // Paper - rewrite chunk system } public boolean areEntitiesLoaded(long chunkPos) { - return this.entityManager.areEntitiesLoaded(chunkPos); + // Paper start - rewrite chunk system + return this.getChunkIfLoadedImmediately(ChunkPos.getX(chunkPos), ChunkPos.getZ(chunkPos)) != null; + // Paper end - rewrite chunk system } private boolean isPositionTickingWithEntitiesLoaded(long chunkPos) { - return this.areEntitiesLoaded(chunkPos) && this.chunkSource.isPositionTicking(chunkPos); + // Paper start - optimize is ticking ready type functions + io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(chunkPos); + // isTicking implies the chunk is loaded, and the chunk is loaded now implies the entities are loaded + return chunkHolder != null && chunkHolder.isTickingReady(); + // Paper end } public boolean isPositionEntityTicking(BlockPos pos) { - return this.entityManager.canPositionTick(pos) && this.chunkSource.chunkMap.getDistanceManager().inEntityTickingRange(ChunkPos.asLong(pos)); + // Paper start - rewrite chunk system + io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos)); + return chunkHolder != null && chunkHolder.isEntityTickingReady(); + // Paper end - rewrite chunk system } public boolean isNaturalSpawningAllowed(BlockPos pos) { - return this.entityManager.canPositionTick(pos); + // Paper start - rewrite chunk system + io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos)); + return chunkHolder != null && chunkHolder.isEntityTickingReady(); + // Paper end - rewrite chunk system } public boolean isNaturalSpawningAllowed(ChunkPos pos) { - return this.entityManager.canPositionTick(pos); + // Paper start - rewrite chunk system + io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder = this.chunkTaskScheduler.chunkHolderManager.getChunkHolder(io.papermc.paper.util.CoordinateUtils.getChunkKey(pos)); + return chunkHolder != null && chunkHolder.isEntityTickingReady(); + // Paper end - rewrite chunk system } @Override @@ -2211,7 +2465,7 @@ public class ServerLevel extends Level implements WorldGenLevel { CrashReportCategory crashreportsystemdetails = super.fillReportDetails(report); crashreportsystemdetails.setDetail("Loaded entity count", () -> { - return String.valueOf(this.entityManager.count()); + return String.valueOf(this.entityLookup.getAllCopy().length); // Paper }); return crashreportsystemdetails; } diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java index bee8cc19d7912d2ab1b731c47cf7e31d21d61866..65e6623c2d1a6cf48729f78948fc48e82057114c 100644 --- a/src/main/java/net/minecraft/server/level/ServerPlayer.java +++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java @@ -292,6 +292,50 @@ public class ServerPlayer extends Player { public @Nullable String clientBrandName = null; // Paper - Brand support public org.bukkit.event.player.PlayerQuitEvent.QuitReason quitReason = null; // Paper - Add API for quit reason; there are a lot of changes to do if we change all methods leading to the event + // Paper start - replace player chunk loader + private final java.util.concurrent.atomic.AtomicReference viewDistances = new java.util.concurrent.atomic.AtomicReference<>(new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances(-1, -1, -1)); + public io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.PlayerChunkLoaderData chunkLoader; + + public io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances getViewDistances() { + return this.viewDistances.get(); + } + + private void updateViewDistance(final java.util.function.Function update) { + for (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances curr = this.viewDistances.get();;) { + if (this.viewDistances.compareAndSet(curr, update.apply(curr))) { + return; + } + } + } + + public void setTickViewDistance(final int distance) { + if ((distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE)) { + throw new IllegalArgumentException("Tick view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE) + ", got: " + distance); + } + this.updateViewDistance((input) -> { + return input.setTickViewDistance(distance); + }); + } + + public void setLoadViewDistance(final int distance) { + if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { + throw new IllegalArgumentException("Load view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); + } + this.updateViewDistance((input) -> { + return input.setLoadViewDistance(distance); + }); + } + + public void setSendViewDistance(final int distance) { + if (distance != -1 && (distance < io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE || distance > io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1)) { + throw new IllegalArgumentException("Send view distance must be a number between " + io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MIN_VIEW_DISTANCE + " and " + (io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.MAX_VIEW_DISTANCE + 1) + " or -1, got: " + distance); + } + this.updateViewDistance((input) -> { + return input.setSendViewDistance(distance); + }); + } + // Paper end - replace player chunk loader + public ServerPlayer(MinecraftServer server, ServerLevel world, GameProfile profile, ClientInformation clientOptions) { super(world, world.getSharedSpawnPos(), world.getSharedSpawnAngle(), profile); this.chatVisibility = ChatVisiblity.FULL; diff --git a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java index f206df06a7d8895175db31d4a840d7467ffe826f..8ef22f8f0d6da49247a90152e5cfa9ffc7f596a4 100644 --- a/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java +++ b/src/main/java/net/minecraft/server/level/ThreadedLevelLightEngine.java @@ -37,15 +37,12 @@ import net.minecraft.world.level.chunk.status.ChunkStatus; public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCloseable { public static final int DEFAULT_BATCH_SIZE = 1000; private static final Logger LOGGER = LogUtils.getLogger(); - private final ProcessorMailbox taskMailbox; - private final ObjectList> lightTasks = new ObjectArrayList<>(); + // Paper - rewrite chunk system private final ChunkMap chunkMap; - private final ProcessorHandle> sorterMailbox; - private final int taskPerBatch = 1000; - private final AtomicBoolean scheduled = new AtomicBoolean(); + // Paper - rewrite chunk system // Paper start - replace light engine impl - protected final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine; + public final ca.spottedleaf.starlight.common.light.StarLightInterface theLightEngine; public final boolean hasBlockLight; public final boolean hasSkyLight; // Paper end - replace light engine impl @@ -59,8 +56,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl ) { super(chunkProvider, false, false); // Paper - destroy vanilla light engine state this.chunkMap = chunkStorage; - this.sorterMailbox = executor; - this.taskMailbox = processor; + // Paper - rewrite chunk system // Paper start - replace light engine impl this.hasBlockLight = true; this.hasSkyLight = hasBlockLight; // Nice variable name. @@ -104,7 +100,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl ++totalChunks; } - this.taskMailbox.tell(() -> { + this.chunkMap.level.chunkTaskScheduler.radiusAwareScheduler.queueInfiniteRadiusTask(() -> { // Paper - rewrite chunk system this.theLightEngine.relightChunks(chunks, (ChunkPos chunkPos) -> { chunkLightCallback.accept(chunkPos); ((java.util.concurrent.Executor)((ServerLevel)this.theLightEngine.getWorld()).getChunkSource().mainThreadProcessor).execute(() -> { @@ -121,7 +117,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl private final Long2IntOpenHashMap chunksBeingWorkedOn = new Long2IntOpenHashMap(); private void queueTaskForSection(final int chunkX, final int chunkY, final int chunkZ, - final Supplier runnable) { + final Supplier runnable) { // Paper - rewrite chunk system final ServerLevel world = (ServerLevel)this.theLightEngine.getWorld(); final ChunkAccess center = this.theLightEngine.getAnyChunkNow(chunkX, chunkZ); @@ -148,7 +144,7 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl final long key = CoordinateUtils.getChunkKey(chunkX, chunkZ); - final ca.spottedleaf.starlight.common.light.StarLightInterface.LightQueue.ChunkTasks updateFuture = runnable.get(); + final io.papermc.paper.chunk.system.light.LightQueue.ChunkTasks updateFuture = runnable.get(); // Paper - rewrite chunk system if (updateFuture == null) { // not scheduled @@ -285,16 +281,11 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl } private void addTask(int x, int z, ThreadedLevelLightEngine.TaskType stage, Runnable task) { - this.addTask(x, z, this.chunkMap.getChunkQueueLevel(ChunkPos.asLong(x, z)), stage, task); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } private void addTask(int x, int z, IntSupplier completedLevelSupplier, ThreadedLevelLightEngine.TaskType stage, Runnable task) { - this.sorterMailbox.tell(ChunkTaskPriorityQueueSorter.message(() -> { - this.lightTasks.add(Pair.of(stage, task)); - if (this.lightTasks.size() >= 1000) { - this.runUpdate(); - } - }, ChunkPos.asLong(x, z), completedLevelSupplier)); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @Override @@ -327,83 +318,15 @@ public class ThreadedLevelLightEngine extends LevelLightEngine implements AutoCl } public CompletableFuture lightChunk(ChunkAccess chunk, boolean excludeBlocks) { - // Paper start - replace light engine impl - if (true) { - boolean lit = excludeBlocks; - final ChunkPos chunkPos = chunk.getPos(); - - return CompletableFuture.supplyAsync(() -> { - final Boolean[] emptySections = StarLightEngine.getEmptySectionsForChunk(chunk); - if (!lit) { - chunk.setLightCorrect(false); - this.theLightEngine.lightChunk(chunk, emptySections); - chunk.setLightCorrect(true); - } else { - this.theLightEngine.forceLoadInChunk(chunk, emptySections); - // can't really force the chunk to be edged checked, as we need neighbouring chunks - but we don't have - // them, so if it's not loaded then i guess we can't do edge checks. later loads of the chunk should - // catch what we miss here. - this.theLightEngine.checkChunkEdges(chunkPos.x, chunkPos.z); - } - - this.chunkMap.releaseLightTicket(chunkPos); - return chunk; - }, (runnable) -> { - this.theLightEngine.scheduleChunkLight(chunkPos, runnable); - this.tryScheduleUpdate(); - }).whenComplete((final ChunkAccess c, final Throwable throwable) -> { - if (throwable != null) { - LOGGER.error("Failed to light chunk " + chunkPos, throwable); - } - }); - } - // Paper end - replace light engine impl - ChunkPos chunkPos = chunk.getPos(); - chunk.setLightCorrect(false); - this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.PRE_UPDATE, Util.name(() -> { - if (!excludeBlocks) { - super.propagateLightSources(chunkPos); - } - }, () -> "lightChunk " + chunkPos + " " + excludeBlocks)); - return CompletableFuture.supplyAsync(() -> { - chunk.setLightCorrect(true); - this.chunkMap.releaseLightTicket(chunkPos); - return chunk; - }, task -> this.addTask(chunkPos.x, chunkPos.z, ThreadedLevelLightEngine.TaskType.POST_UPDATE, task)); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public void tryScheduleUpdate() { - if (this.hasLightWork() && this.scheduled.compareAndSet(false, true)) { // Paper // Paper - rewrite light engine - this.taskMailbox.tell(() -> { - this.runUpdate(); - this.scheduled.set(false); - }); - } + // Paper - rewrite chunk system } private void runUpdate() { - int i = Math.min(this.lightTasks.size(), 1000); - ObjectListIterator> objectListIterator = this.lightTasks.iterator(); - - int j; - for (j = 0; objectListIterator.hasNext() && j < i; j++) { - Pair pair = objectListIterator.next(); - if (pair.getFirst() == ThreadedLevelLightEngine.TaskType.PRE_UPDATE) { - pair.getSecond().run(); - } - } - - objectListIterator.back(j); - this.theLightEngine.propagateChanges(); // Paper - rewrite light engine - - for (int var5 = 0; objectListIterator.hasNext() && var5 < i; var5++) { - Pair pair2 = objectListIterator.next(); - if (pair2.getFirst() == ThreadedLevelLightEngine.TaskType.POST_UPDATE) { - pair2.getSecond().run(); - } - - objectListIterator.remove(); - } + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } public CompletableFuture waitForPendingTasks(int x, int z) { diff --git a/src/main/java/net/minecraft/server/level/Ticket.java b/src/main/java/net/minecraft/server/level/Ticket.java index eba83b085435150e5954fd5d41dda9ce1d0601ad..e97329f867de2acbdd666925ba5d2aafa7a90574 100644 --- a/src/main/java/net/minecraft/server/level/Ticket.java +++ b/src/main/java/net/minecraft/server/level/Ticket.java @@ -6,9 +6,12 @@ public final class Ticket implements Comparable> { private final TicketType type; private final int ticketLevel; public final T key; - private long createdTick; + // Paper start - rewrite chunk system + public long removeDelay; - protected Ticket(TicketType type, int level, T argument) { + public Ticket(TicketType type, int level, T argument, long removeDelay) { + this.removeDelay = removeDelay; + // Paper end - rewrite chunk system this.type = type; this.ticketLevel = level; this.key = argument; @@ -41,7 +44,7 @@ public final class Ticket implements Comparable> { @Override public String toString() { - return "Ticket[" + this.type + " " + this.ticketLevel + " (" + this.key + ")] at " + this.createdTick; + return "Ticket[" + this.type + " " + this.ticketLevel + " (" + this.key + ")] to die in " + this.removeDelay; // Paper - rewrite chunk system } public TicketType getType() { @@ -53,11 +56,10 @@ public final class Ticket implements Comparable> { } protected void setCreatedTick(long tickCreated) { - this.createdTick = tickCreated; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } protected boolean timedOut(long currentTick) { - long l = this.type.timeout(); - return l != 0L && currentTick - this.createdTick > l; + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } } diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java index 6051e5f272838ef23276a90e21c2fc821ca155d1..658e63ebde81dc14c8ab5850fb246dc0aab25dea 100644 --- a/src/main/java/net/minecraft/server/level/TicketType.java +++ b/src/main/java/net/minecraft/server/level/TicketType.java @@ -8,6 +8,7 @@ import net.minecraft.world.level.ChunkPos; public class TicketType { public static final TicketType FUTURE_AWAIT = create("future_await", Long::compareTo); // Paper + public static final TicketType ASYNC_LOAD = create("async_load", Long::compareTo); // Paper private final String name; private final Comparator comparator; @@ -27,6 +28,15 @@ public class TicketType { public static final TicketType PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit public static final TicketType PLUGIN_TICKET = TicketType.create("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // CraftBukkit public static final TicketType CHUNK_RELIGHT = create("light_update", Long::compareTo); // Paper - ensure chunks stay loaded for lighting + // Paper start - rewrite chunk system + public static final TicketType CHUNK_LOAD = create("chunk_load", Long::compareTo); + public static final TicketType STATUS_UPGRADE = create("status_upgrade", Long::compareTo); + public static final TicketType ENTITY_LOAD = create("entity_load", Long::compareTo); + public static final TicketType POI_LOAD = create("poi_load", Long::compareTo); + public static final TicketType UNLOAD_COOLDOWN = create("unload_cooldown", (u1, u2) -> 0, 5 * 20); + public static final TicketType NON_FULL_SYNC_LOAD = create("non_full_sync_load", Long::compareTo); + public static final TicketType DELAY_UNLOAD = create("delay_unload", Comparator.comparingLong(ChunkPos::toLong), 1); + // Paper end - rewrite chunk system public static TicketType create(String name, Comparator argumentComparator) { return new TicketType<>(name, argumentComparator, 0L); diff --git a/src/main/java/net/minecraft/server/level/WorldGenRegion.java b/src/main/java/net/minecraft/server/level/WorldGenRegion.java index ca4c8e256047a4af45811c3e772b5a959e2ae941..1351423a12c19a01f602a202832372a399e6a867 100644 --- a/src/main/java/net/minecraft/server/level/WorldGenRegion.java +++ b/src/main/java/net/minecraft/server/level/WorldGenRegion.java @@ -544,4 +544,21 @@ public class WorldGenRegion implements WorldGenLevel { public long nextSubTickCount() { return this.subTickCount.getAndIncrement(); } + + // Paper start + // No-op, this class doesn't provide entity access + @Override + public List getHardCollidingEntities(Entity except, AABB box, Predicate predicate) { + return Collections.emptyList(); + } + + @Override + public void getEntities(Entity except, AABB box, Predicate predicate, List into) {} + + @Override + public void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into) {} + + @Override + public void getEntitiesByClass(Class clazz, Entity except, AABB box, List into, Predicate predicate) {} + // Paper end } diff --git a/src/main/java/net/minecraft/server/network/PlayerChunkSender.java b/src/main/java/net/minecraft/server/network/PlayerChunkSender.java index c502d9b85eb68b277ae17dfea34e0475f0156647..27d0f1ed58948039004f8f1eba2f7f9609fdeec0 100644 --- a/src/main/java/net/minecraft/server/network/PlayerChunkSender.java +++ b/src/main/java/net/minecraft/server/network/PlayerChunkSender.java @@ -43,16 +43,23 @@ public class PlayerChunkSender { public void dropChunk(ServerPlayer player, ChunkPos pos) { if (!this.pendingChunks.remove(pos.toLong()) && player.isAlive()) { + // Paper start - rewrite player chunk loader + dropChunkStatic(player, pos); + } + } + public static void dropChunkStatic(ServerPlayer player, ChunkPos pos) { + player.serverLevel().chunkSource.chunkMap.getVisibleChunkIfPresent(pos.toLong()).removePlayer(player); player.connection.send(new ClientboundForgetLevelChunkPacket(pos)); // Paper start - PlayerChunkUnloadEvent if (io.papermc.paper.event.packet.PlayerChunkUnloadEvent.getHandlerList().getRegisteredListeners().length > 0) { new io.papermc.paper.event.packet.PlayerChunkUnloadEvent(player.getBukkitEntity().getWorld().getChunkAt(pos.longKey), player.getBukkitEntity()).callEvent(); } // Paper end - PlayerChunkUnloadEvent - } } + // Paper end - rewrite player chunk loader public void sendNextChunks(ServerPlayer player) { + if (true) return; // Paper - rewrite player chunk loader if (this.unacknowledgedBatches < this.maxUnacknowledgedBatches) { float f = Math.max(1.0F, this.desiredChunksPerTick); this.batchQuota = Math.min(this.batchQuota + this.desiredChunksPerTick, f); @@ -78,7 +85,8 @@ public class PlayerChunkSender { } } - private static void sendChunk(ServerGamePacketListenerImpl handler, ServerLevel world, LevelChunk chunk) { + public static void sendChunk(ServerGamePacketListenerImpl handler, ServerLevel world, LevelChunk chunk) { // Paper - rewrite chunk loader - public + handler.player.serverLevel().chunkSource.chunkMap.getVisibleChunkIfPresent(chunk.getPos().toLong()).addPlayer(handler.player); handler.send(new ClientboundLevelChunkWithLightPacket(chunk, world.getLightEngine(), null, null)); // Paper start - PlayerChunkLoadEvent if (io.papermc.paper.event.packet.PlayerChunkLoadEvent.getHandlerList().getRegisteredListeners().length > 0) { @@ -118,6 +126,7 @@ public class PlayerChunkSender { } public void onChunkBatchReceivedByClient(float desiredBatchSize) { + if (true) return; // Paper - rewrite player chunk loader this.unacknowledgedBatches--; this.desiredChunksPerTick = Double.isNaN((double)desiredBatchSize) ? 0.01F : Mth.clamp(desiredBatchSize, 0.01F, 64.0F); if (this.unacknowledgedBatches == 0) { diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java index 0aa28caa1254137c0bae8e213bd08c9a654f5335..c4b4e5f5c9366b241686e881cda34568a57b4877 100644 --- a/src/main/java/net/minecraft/server/players/PlayerList.java +++ b/src/main/java/net/minecraft/server/players/PlayerList.java @@ -296,7 +296,7 @@ public abstract class PlayerList { boolean flag2 = gamerules.getBoolean(GameRules.RULE_LIMITED_CRAFTING); // Spigot - view distance - playerconnection.send(new ClientboundLoginPacket(player.getId(), worlddata.isHardcore(), this.server.levelKeys(), this.getMaxPlayers(), worldserver1.spigotConfig.viewDistance, worldserver1.spigotConfig.simulationDistance, flag1, !flag, flag2, player.createCommonSpawnInfo(worldserver1), this.server.enforceSecureProfile())); + playerconnection.send(new ClientboundLoginPacket(player.getId(), worlddata.isHardcore(), this.server.levelKeys(), this.getMaxPlayers(), worldserver1.getWorld().getSendViewDistance(), worldserver1.getWorld().getSimulationDistance(), flag1, !flag, flag2, player.createCommonSpawnInfo(worldserver1), this.server.enforceSecureProfile())); // Paper - replace old player chunk management player.getBukkitEntity().sendSupportedChannels(); // CraftBukkit playerconnection.send(new ClientboundChangeDifficultyPacket(worlddata.getDifficulty(), worlddata.isDifficultyLocked())); playerconnection.send(new ClientboundPlayerAbilitiesPacket(player.getAbilities())); @@ -943,8 +943,8 @@ public abstract class PlayerList { LevelData worlddata = worldserver2.getLevelData(); entityplayer1.connection.send(new ClientboundRespawnPacket(entityplayer1.createCommonSpawnInfo(worldserver2), (byte) i)); - entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.spigotConfig.viewDistance)); // Spigot - entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.spigotConfig.simulationDistance)); // Spigot + entityplayer1.connection.send(new ClientboundSetChunkCacheRadiusPacket(worldserver1.getWorld().getSendViewDistance())); // Spigot // Paper - replace old player chunk management + entityplayer1.connection.send(new ClientboundSetSimulationDistancePacket(worldserver1.getWorld().getSimulationDistance())); // Spigot // Paper - replace old player chunk management entityplayer1.connection.teleport(CraftLocation.toBukkit(entityplayer1.position(), worldserver2.getWorld(), entityplayer1.getYRot(), entityplayer1.getXRot())); // CraftBukkit entityplayer1.connection.send(new ClientboundSetDefaultSpawnPositionPacket(worldserver1.getSharedSpawnPos(), worldserver1.getSharedSpawnAngle())); entityplayer1.connection.send(new ClientboundChangeDifficultyPacket(worlddata.getDifficulty(), worlddata.isDifficultyLocked())); @@ -1496,7 +1496,7 @@ public abstract class PlayerList { public void setViewDistance(int viewDistance) { this.viewDistance = viewDistance; - this.broadcastAll(new ClientboundSetChunkCacheRadiusPacket(viewDistance)); + //this.broadcastAll(new ClientboundSetChunkCacheRadiusPacket(viewDistance)); // Paper - move into setViewDistance Iterator iterator = this.server.getAllLevels().iterator(); while (iterator.hasNext()) { @@ -1511,7 +1511,7 @@ public abstract class PlayerList { public void setSimulationDistance(int simulationDistance) { this.simulationDistance = simulationDistance; - this.broadcastAll(new ClientboundSetSimulationDistancePacket(simulationDistance)); + //this.broadcastAll(new ClientboundSetSimulationDistancePacket(simulationDistance)); // Paper - handled by playerchunkloader Iterator iterator = this.server.getAllLevels().iterator(); while (iterator.hasNext()) { diff --git a/src/main/java/net/minecraft/util/SortedArraySet.java b/src/main/java/net/minecraft/util/SortedArraySet.java index ea72dcb064a35bc6245bc5c94d592efedd8faf41..0793dfe47e68a2b48b010aad5b12dcfa1701293a 100644 --- a/src/main/java/net/minecraft/util/SortedArraySet.java +++ b/src/main/java/net/minecraft/util/SortedArraySet.java @@ -14,6 +14,14 @@ public class SortedArraySet extends AbstractSet { T[] contents; int size; + // Paper start - rewrite chunk system + public SortedArraySet(final SortedArraySet other) { + this.comparator = other.comparator; + this.size = other.size; + this.contents = Arrays.copyOf(other.contents, this.size); + } + // Paper end - rewrite chunk system + private SortedArraySet(int initialCapacity, Comparator comparator) { this.comparator = comparator; if (initialCapacity < 0) { @@ -22,6 +30,41 @@ public class SortedArraySet extends AbstractSet { this.contents = (T[])castRawArray(new Object[initialCapacity]); } } + // Paper start - optimise removeIf + @Override + public boolean removeIf(java.util.function.Predicate filter) { + // prev. impl used an iterator, which could be n^2 and creates garbage + int i = 0, len = this.size; + T[] backingArray = this.contents; + + for (;;) { + if (i >= len) { + return false; + } + if (!filter.test(backingArray[i])) { + ++i; + continue; + } + break; + } + + // we only want to write back to backingArray if we really need to + + int lastIndex = i; // this is where new elements are shifted to + + for (; i < len; ++i) { + T curr = backingArray[i]; + if (!filter.test(curr)) { // if test throws we're screwed + backingArray[lastIndex++] = curr; + } + } + + // cleanup end + Arrays.fill(backingArray, lastIndex, len, null); + this.size = lastIndex; + return true; + } + // Paper end - optimise removeIf public static > SortedArraySet create() { return create(10); @@ -110,6 +153,31 @@ public class SortedArraySet extends AbstractSet { } } + // Paper start - rewrite chunk system + public T replace(T object) { + int i = this.findIndex(object); + if (i >= 0) { + T old = this.contents[i]; + this.contents[i] = object; + return old; + } else { + this.addInternal(object, getInsertionPosition(i)); + return object; + } + } + + public T removeAndGet(T object) { + int i = this.findIndex(object); + if (i >= 0) { + final T ret = this.contents[i]; + this.removeInternal(i); + return ret; + } else { + return null; + } + } + // Paper end - rewrite chunk system + @Override public boolean remove(Object object) { int i = this.findIndex((T)object); diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java index 3c1bcf8d1a07b35a8688160c9f05f792451338a3..03840f520624662d4ce3ac9f3065a01c71b5f299 100644 --- a/src/main/java/net/minecraft/world/entity/Entity.java +++ b/src/main/java/net/minecraft/world/entity/Entity.java @@ -482,6 +482,58 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess } // Paper end + // Paper start + /** + * Overriding this field will cause memory leaks. + */ + private final boolean hardCollides; + + private static final java.util.Map, Boolean> cachedOverrides = java.util.Collections.synchronizedMap(new java.util.WeakHashMap<>()); + { + /* // Goodbye, broken on reobf... + Boolean hardCollides = cachedOverrides.get(this.getClass()); + if (hardCollides == null) { + try { + java.lang.reflect.Method getHardCollisionBoxEntityMethod = Entity.class.getMethod("canCollideWith", Entity.class); + java.lang.reflect.Method hasHardCollisionBoxMethod = Entity.class.getMethod("canBeCollidedWith"); + if (!this.getClass().getMethod(hasHardCollisionBoxMethod.getName(), hasHardCollisionBoxMethod.getParameterTypes()).equals(hasHardCollisionBoxMethod) + || !this.getClass().getMethod(getHardCollisionBoxEntityMethod.getName(), getHardCollisionBoxEntityMethod.getParameterTypes()).equals(getHardCollisionBoxEntityMethod)) { + hardCollides = Boolean.TRUE; + } else { + hardCollides = Boolean.FALSE; + } + cachedOverrides.put(this.getClass(), hardCollides); + } + catch (ThreadDeath thr) { throw thr; } + catch (Throwable thr) { + // shouldn't happen, just explode + throw new RuntimeException(thr); + } + } */ + this.hardCollides = this instanceof Boat + || this instanceof net.minecraft.world.entity.monster.Shulker + || this instanceof net.minecraft.world.entity.vehicle.AbstractMinecart + || this.shouldHardCollide(); + } + + // plugins can override + protected boolean shouldHardCollide() { + return false; + } + + public final boolean hardCollides() { + return this.hardCollides; + } + + public net.minecraft.server.level.FullChunkStatus chunkStatus; + + public int sectionX = Integer.MIN_VALUE; + public int sectionY = Integer.MIN_VALUE; + public int sectionZ = Integer.MIN_VALUE; + + public boolean updatingSectionStatus = false; + // Paper end + public Entity(EntityType type, Level world) { this.id = Entity.ENTITY_COUNTER.incrementAndGet(); this.passengers = ImmutableList.of(); @@ -2608,11 +2660,11 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess return InteractionResult.PASS; } - public boolean canCollideWith(Entity other) { + public boolean canCollideWith(Entity other) { // Paper - diff on change, hard colliding entities override this - TODO CHECK ON UPDATE - AbstractMinecart/Boat override return other.canBeCollidedWith() && !this.isPassengerOfSameVehicle(other); } - public boolean canBeCollidedWith() { + public boolean canBeCollidedWith() { // Paper - diff on change, hard colliding entities override this TODO CHECK ON UPDATE - Boat/Shulker override return false; } @@ -4037,6 +4089,13 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess }).count(); } + // Paper start - rewrite chunk system + public boolean hasAnyPlayerPassengers() { + // copied from below + if (this.passengers.isEmpty()) { return false; } + return this.getIndirectPassengersStream().anyMatch((entity) -> entity instanceof Player); + } + // Paper end - rewrite chunk system public boolean hasExactlyOnePlayerPassenger() { if (this.passengers.isEmpty()) { return false; } // Paper - Optimize indirect passenger iteration return this.countPlayerPassengers() == 1; @@ -4387,6 +4446,12 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess return; } // Paper end - Block invalid positions and bounding box + // Paper start - rewrite chunk system + if (this.updatingSectionStatus) { + LOGGER.error("Refusing to update position for entity {} to position {} since it is processing a section status update", this, new Vec3(x, y, z), new Throwable()); + return; + } + // Paper end - rewrite chunk system // Paper start - Fix MC-4 if (this instanceof ItemEntity) { if (io.papermc.paper.configuration.GlobalConfiguration.get().misc.fixEntityPositionDesync) { @@ -4514,6 +4579,13 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess @Override public final void setRemoved(Entity.RemovalReason entity_removalreason, EntityRemoveEvent.Cause cause) { + // Paper start - rewrite chunk system + io.papermc.paper.util.TickThread.ensureTickThread(this, "Cannot remove entity off-main"); + if (!((ServerLevel)this.level).getEntityLookup().canRemoveEntity(this)) { + LOGGER.warn("Entity " + this + " is currently prevented from being removed from the world since it is processing section status updates", new Throwable()); + return; + } + // Paper end - rewrite chunk system CraftEventFactory.callEntityRemoveEvent(this, cause); // CraftBukkit end final boolean alreadyRemoved = this.removalReason != null; // Paper - Folia schedulers @@ -4525,7 +4597,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess this.stopRiding(); } - this.getPassengers().forEach(Entity::stopRiding); + if (entity_removalreason != RemovalReason.UNLOADED_TO_CHUNK) this.getPassengers().forEach(Entity::stopRiding); // Paper - chunk system - don't adjust passenger state when unloading, it's just not safe (and messes with our logic in entity chunk unload) this.levelCallback.onRemove(entity_removalreason); // Paper start - Folia schedulers if (!(this instanceof ServerPlayer) && entity_removalreason != RemovalReason.CHANGED_DIMENSION && !alreadyRemoved) { @@ -4556,7 +4628,7 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess @Override public boolean shouldBeSaved() { - return this.removalReason != null && !this.removalReason.shouldSave() ? false : (this.isPassenger() ? false : !this.isVehicle() || !this.hasExactlyOnePlayerPassenger()); + return this.removalReason != null && !this.removalReason.shouldSave() ? false : (this.isPassenger() ? false : !this.isVehicle() || !this.hasAnyPlayerPassengers()); // Paper - rewrite chunk system - it should check if the entity has ANY player passengers } @Override diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java index 71d8909f35a22256406a2232d21adfd7d94dc3a5..7b52b0507cbda76aee1db954641f397bef51f94d 100644 --- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java +++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiManager.java @@ -40,20 +40,40 @@ import net.minecraft.world.level.chunk.storage.SimpleRegionStorage; public class PoiManager extends SectionStorage { public static final int MAX_VILLAGE_DISTANCE = 6; public static final int VILLAGE_SECTION_SIZE = 1; - private final PoiManager.DistanceTracker distanceTracker; - private final LongSet loadedChunks = new LongOpenHashSet(); + // Paper start - rewrite chunk system + // the vanilla tracker needs to be replaced because it does not support level removes + public final net.minecraft.server.level.ServerLevel world; + private final io.papermc.paper.util.misc.Delayed26WayDistancePropagator3D villageDistanceTracker = new io.papermc.paper.util.misc.Delayed26WayDistancePropagator3D(); + static final int POI_DATA_SOURCE = 7; + public static int convertBetweenLevels(final int level) { + return POI_DATA_SOURCE - level; + } + + protected void updateDistanceTracking(long section) { + if (this.isVillageCenter(section)) { + this.villageDistanceTracker.setSource(section, POI_DATA_SOURCE); + } else { + this.villageDistanceTracker.removeSource(section); + } + } + // Paper end - rewrite chunk system public PoiManager( RegionStorageInfo storageKey, Path directory, DataFixer dataFixer, boolean dsync, RegistryAccess registryManager, LevelHeightAccessor world ) { super( + // Paper start + storageKey, + directory, + dsync, + // Paper end new SimpleRegionStorage(storageKey, directory, dataFixer, dsync, DataFixTypes.POI_CHUNK), PoiSection::codec, PoiSection::new, registryManager, world ); - this.distanceTracker = new PoiManager.DistanceTracker(); + this.world = (net.minecraft.server.level.ServerLevel)world; // Paper - rewrite chunk system } public void add(BlockPos pos, Holder type) { @@ -187,8 +207,8 @@ public class PoiManager extends SectionStorage { } public int sectionsToVillage(SectionPos pos) { - this.distanceTracker.runAllUpdates(); - return this.distanceTracker.getLevel(pos.asLong()); + this.villageDistanceTracker.propagateUpdates(); // Paper - replace distance tracking util + return convertBetweenLevels(this.villageDistanceTracker.getLevel(io.papermc.paper.util.CoordinateUtils.getChunkSectionKey(pos))); // Paper - replace distance tracking util } boolean isVillageCenter(long pos) { @@ -202,20 +222,117 @@ public class PoiManager extends SectionStorage { @Override public void tick(BooleanSupplier shouldKeepTicking) { - super.tick(shouldKeepTicking); - this.distanceTracker.runAllUpdates(); + this.villageDistanceTracker.propagateUpdates(); // Paper - rewrite chunk system } @Override - protected void setDirty(long pos) { - super.setDirty(pos); - this.distanceTracker.update(pos, this.distanceTracker.getLevelFromSource(pos), false); + public void setDirty(long pos) { + // Paper start - rewrite chunk system + int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); + int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); + io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; + io.papermc.paper.chunk.system.poi.PoiChunk chunk = manager.getPoiChunkIfLoaded(chunkX, chunkZ, false); + if (chunk != null) { + chunk.setDirty(true); + } + this.updateDistanceTracking(pos); + // Paper end - rewrite chunk system } @Override protected void onSectionLoad(long pos) { - this.distanceTracker.update(pos, this.distanceTracker.getLevelFromSource(pos), false); + this.updateDistanceTracking(pos); // Paper - move to new distance tracking util + } + + // Paper start - rewrite chunk system + @Override + public Optional get(long pos) { + int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); + int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos); + int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); + + io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main"); + + io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; + io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true); + + return ret == null ? Optional.empty() : ret.getSectionForVanilla(chunkY); + } + + @Override + public Optional getOrLoad(long pos) { + int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); + int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos); + int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); + + io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main"); + + io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; + + if (chunkY >= io.papermc.paper.util.WorldUtil.getMinSection(this.world) && + chunkY <= io.papermc.paper.util.WorldUtil.getMaxSection(this.world)) { + io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true); + if (ret != null) { + return ret.getSectionForVanilla(chunkY); + } else { + return manager.loadPoiChunk(chunkX, chunkZ).getSectionForVanilla(chunkY); + } + } + // retain vanilla behavior: do not load section if out of bounds! + return Optional.empty(); + } + + @Override + protected PoiSection getOrCreate(long pos) { + int chunkX = io.papermc.paper.util.CoordinateUtils.getChunkSectionX(pos); + int chunkY = io.papermc.paper.util.CoordinateUtils.getChunkSectionY(pos); + int chunkZ = io.papermc.paper.util.CoordinateUtils.getChunkSectionZ(pos); + + io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Accessing poi chunk off-main"); + + io.papermc.paper.chunk.system.scheduling.ChunkHolderManager manager = this.world.chunkTaskScheduler.chunkHolderManager; + + io.papermc.paper.chunk.system.poi.PoiChunk ret = manager.getPoiChunkIfLoaded(chunkX, chunkZ, true); + if (ret != null) { + return ret.getOrCreateSection(chunkY); + } else { + return manager.loadPoiChunk(chunkX, chunkZ).getOrCreateSection(chunkY); + } + } + + public void onUnload(long coordinate) { // Paper - rewrite chunk system + int chunkX = io.papermc.paper.util.MCUtil.getCoordinateX(coordinate); + int chunkZ = io.papermc.paper.util.MCUtil.getCoordinateZ(coordinate); + io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Unloading poi chunk off-main"); + for (int section = this.levelHeightAccessor.getMinSection(); section < this.levelHeightAccessor.getMaxSection(); ++section) { + long sectionPos = SectionPos.asLong(chunkX, section, chunkZ); + this.updateDistanceTracking(sectionPos); + } + } + + public void loadInPoiChunk(io.papermc.paper.chunk.system.poi.PoiChunk poiChunk) { + int chunkX = poiChunk.chunkX; + int chunkZ = poiChunk.chunkZ; + io.papermc.paper.util.TickThread.ensureTickThread(this.world, chunkX, chunkZ, "Loading poi chunk off-main"); + for (int sectionY = this.levelHeightAccessor.getMinSection(); sectionY < this.levelHeightAccessor.getMaxSection(); ++sectionY) { + PoiSection section = poiChunk.getSection(sectionY); + if (section != null && !section.isEmpty()) { + this.onSectionLoad(SectionPos.asLong(chunkX, sectionY, chunkZ)); + } + } + } + + public void checkConsistency(net.minecraft.world.level.chunk.ChunkAccess chunk) { + int chunkX = chunk.getPos().x; + int chunkZ = chunk.getPos().z; + int minY = io.papermc.paper.util.WorldUtil.getMinSection(chunk); + int maxY = io.papermc.paper.util.WorldUtil.getMaxSection(chunk); + LevelChunkSection[] sections = chunk.getSections(); + for (int section = minY; section <= maxY; ++section) { + this.checkConsistencyWithBlocks(SectionPos.of(chunkX, section, chunkZ), sections[section - minY]); + } } + // Paper end - rewrite chunk system public void checkConsistencyWithBlocks(SectionPos sectionPos, LevelChunkSection chunkSection) { Util.ifElse(this.getOrLoad(sectionPos.asLong()), poiSet -> poiSet.refresh(populator -> { @@ -251,7 +368,7 @@ public class PoiManager extends SectionStorage { .map(sectionPos -> Pair.of(sectionPos, this.getOrLoad(sectionPos.asLong()))) .filter(pair -> !pair.getSecond().map(PoiSection::isValid).orElse(false)) .map(pair -> pair.getFirst().chunk()) - .filter(chunkPos -> this.loadedChunks.add(chunkPos.toLong())) + // Paper - rewrite chunk system .forEach(chunkPos -> world.getChunk(chunkPos.x, chunkPos.z, ChunkStatus.EMPTY)); } @@ -265,7 +382,7 @@ public class PoiManager extends SectionStorage { @Override protected int getLevelFromSource(long id) { - return PoiManager.this.isVillageCenter(id) ? 0 : 7; + return PoiManager.this.isVillageCenter(id) ? 0 : 7; // Paper - rewrite chunk system - diff on change, this specifies the source level to use for distance tracking } @Override @@ -287,6 +404,35 @@ public class PoiManager extends SectionStorage { } } + // Paper start - Asynchronous chunk io + @javax.annotation.Nullable + @Override + public net.minecraft.nbt.CompoundTag read(ChunkPos chunkcoordintpair) throws java.io.IOException { + // Paper start - rewrite chunk system + if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { + return io.papermc.paper.chunk.system.io.RegionFileIOThread.loadData( + this.world, chunkcoordintpair.x, chunkcoordintpair.z, io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA, + io.papermc.paper.chunk.system.io.RegionFileIOThread.getIOBlockingPriorityForCurrentThread() + ); + } + // Paper end - rewrite chunk system + return super.read(chunkcoordintpair); + } + + @Override + public void write(ChunkPos chunkcoordintpair, net.minecraft.nbt.CompoundTag nbttagcompound) throws java.io.IOException { + // Paper start - rewrite chunk system + if (!io.papermc.paper.chunk.system.io.RegionFileIOThread.isRegionFileThread()) { + io.papermc.paper.chunk.system.io.RegionFileIOThread.scheduleSave( + this.world, chunkcoordintpair.x, chunkcoordintpair.z, nbttagcompound, + io.papermc.paper.chunk.system.io.RegionFileIOThread.RegionFileType.POI_DATA); + return; + } + // Paper end - rewrite chunk system + super.write(chunkcoordintpair, nbttagcompound); + } + // Paper end + public static enum Occupancy { HAS_SPACE(PoiRecord::hasSpace), IS_OCCUPIED(PoiRecord::isOccupied), diff --git a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java index 971fb29a2c3dc713cb8ab1d2eed054cc16f9c93c..5b7deae326228e482b218aeebd857a59b7434eaf 100644 --- a/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java +++ b/src/main/java/net/minecraft/world/entity/ai/village/poi/PoiSection.java @@ -29,6 +29,7 @@ public class PoiSection { private final Map, Set> byType = Maps.newHashMap(); private final Runnable setDirty; private boolean isValid; + public final Optional noAllocateOptional = Optional.of(this); // Paper - rewrite chunk system public static Codec codec(Runnable updateListener) { return RecordCodecBuilder.create( @@ -46,6 +47,12 @@ public class PoiSection { this(updateListener, true, ImmutableList.of()); } + // Paper start - isEmpty + public boolean isEmpty() { + return this.isValid && this.records.isEmpty() && this.byType.isEmpty(); + } + // Paper end + private PoiSection(Runnable updateListener, boolean valid, List pois) { this.setDirty = updateListener; this.isValid = valid; diff --git a/src/main/java/net/minecraft/world/level/EntityGetter.java b/src/main/java/net/minecraft/world/level/EntityGetter.java index bd20bea7f76a7307f1698fb2dfef37125032d166..9a28912f52824acdc80a62243b136e6f365bf567 100644 --- a/src/main/java/net/minecraft/world/level/EntityGetter.java +++ b/src/main/java/net/minecraft/world/level/EntityGetter.java @@ -19,6 +19,18 @@ import net.minecraft.world.phys.shapes.Shapes; import net.minecraft.world.phys.shapes.VoxelShape; public interface EntityGetter { + + // Paper start + List getHardCollidingEntities(Entity except, AABB box, Predicate predicate); + + void getEntities(Entity except, AABB box, Predicate predicate, List into); + + void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into); + + void getEntitiesByClass(Class clazz, Entity except, final AABB box, List into, + Predicate predicate); + // Paper end + List getEntities(@Nullable Entity except, AABB box, Predicate predicate); List getEntities(EntityTypeTest filter, AABB box, Predicate predicate); diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java index 975fcd4b8f93cb8c602ddeb165c485214eac10a4..d3137c9e5cc42ef191ea233b0d37eafeffc6f82c 100644 --- a/src/main/java/net/minecraft/world/level/Level.java +++ b/src/main/java/net/minecraft/world/level/Level.java @@ -547,6 +547,11 @@ public abstract class Level implements LevelAccessor, AutoCloseable { if ((i & 2) != 0 && (!this.isClientSide || (i & 4) == 0) && (this.isClientSide || chunk == null || (chunk.getFullStatus() != null && chunk.getFullStatus().isOrAfter(FullChunkStatus.BLOCK_TICKING)))) { // allow chunk to be null here as chunk.isReady() is false when we send our notification during block placement this.sendBlockUpdated(blockposition, iblockdata1, iblockdata, i); + // Paper start - per player view distance - allow block updates for non-ticking chunks in player view distance + // if copied from above + } else if ((i & 2) != 0 && (!this.isClientSide || (i & 4) == 0)) { // Paper - replace old player chunk management + ((ServerLevel)this).getChunkSource().blockChanged(blockposition); + // Paper end - per player view distance } if ((i & 1) != 0) { @@ -941,7 +946,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { } // Paper end - Perf: Optimize capturedTileEntities lookup // CraftBukkit end - return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && Thread.currentThread() != this.thread ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE)); + return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && !io.papermc.paper.util.TickThread.isTickThread() ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE)); // Paper - rewrite chunk system } public void setBlockEntity(BlockEntity blockEntity) { @@ -1032,26 +1037,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable { public List getEntities(@Nullable Entity except, AABB box, Predicate predicate) { this.getProfiler().incrementCounter("getEntities"); List list = Lists.newArrayList(); - - this.getEntities().get(box, (entity1) -> { - if (entity1 != except && predicate.test(entity1)) { - list.add(entity1); - } - - if (entity1 instanceof EnderDragon) { - EnderDragonPart[] aentitycomplexpart = ((EnderDragon) entity1).getSubEntities(); - int i = aentitycomplexpart.length; - - for (int j = 0; j < i; ++j) { - EnderDragonPart entitycomplexpart = aentitycomplexpart[j]; - - if (entity1 != except && predicate.test(entitycomplexpart)) { - list.add(entitycomplexpart); - } - } - } - - }); + ((ServerLevel)this).getEntityLookup().getEntities(except, box, list, predicate); // Paper - optimise this call return list; } @@ -1069,33 +1055,23 @@ public abstract class Level implements LevelAccessor, AutoCloseable { public void getEntities(EntityTypeTest filter, AABB box, Predicate predicate, List result, int limit) { this.getProfiler().incrementCounter("getEntities"); - this.getEntities().get(filter, box, (entity) -> { - if (predicate.test(entity)) { - result.add(entity); - if (result.size() >= limit) { - return AbortableIterationConsumer.Continuation.ABORT; - } - } - - if (entity instanceof EnderDragon entityenderdragon) { - EnderDragonPart[] aentitycomplexpart = entityenderdragon.getSubEntities(); - int j = aentitycomplexpart.length; - - for (int k = 0; k < j; ++k) { - EnderDragonPart entitycomplexpart = aentitycomplexpart[k]; - T t0 = filter.tryCast(entitycomplexpart); // CraftBukkit - decompile error - - if (t0 != null && predicate.test(t0)) { - result.add(t0); - if (result.size() >= limit) { - return AbortableIterationConsumer.Continuation.ABORT; - } - } - } + // Paper start - optimise this call + //TODO use limit + if (filter instanceof net.minecraft.world.entity.EntityType entityTypeTest) { + ((ServerLevel) this).getEntityLookup().getEntities(entityTypeTest, box, result, predicate); + } else { + Predicate test = (obj) -> { + return filter.tryCast(obj) != null; + }; + predicate = predicate == null ? test : test.and((Predicate) predicate); + Class base; + if (filter == null || (base = filter.getBaseClass()) == null || base == Entity.class) { + ((ServerLevel) this).getEntityLookup().getEntities((Entity) null, box, (List) result, (Predicate)predicate); + } else { + ((ServerLevel) this).getEntityLookup().getEntities(base, null, box, (List) result, (Predicate)predicate); // Paper - optimise this call } - - return AbortableIterationConsumer.Continuation.CONTINUE; - }); + } + // Paper end - optimise this call } @Nullable @@ -1385,4 +1361,45 @@ public abstract class Level implements LevelAccessor, AutoCloseable { } } // Paper end - notify observers even if grow failed + // Paper start + //protected final io.papermc.paper.world.EntitySliceManager entitySliceManager; // Paper - rewrite chunk system + + public org.bukkit.entity.Entity[] getChunkEntities(int chunkX, int chunkZ) { + io.papermc.paper.world.ChunkEntitySlices slices = ((ServerLevel)this).getEntityLookup().getChunk(chunkX, chunkZ); + if (slices == null) { + return new org.bukkit.entity.Entity[0]; + } + return slices.getChunkEntities(); + } + + @Override + public List getHardCollidingEntities(Entity except, AABB box, Predicate predicate) { + List ret = new java.util.ArrayList<>(); + ((ServerLevel)this).getEntityLookup().getHardCollidingEntities(except, box, ret, predicate); + return ret; + } + + @Override + public void getEntities(Entity except, AABB box, Predicate predicate, List into) { + ((ServerLevel)this).getEntityLookup().getEntities(except, box, into, predicate); + } + + @Override + public void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into) { + ((ServerLevel)this).getEntityLookup().getHardCollidingEntities(except, box, into, predicate); + } + + @Override + public void getEntitiesByClass(Class clazz, Entity except, final AABB box, List into, + Predicate predicate) { + ((ServerLevel)this).getEntityLookup().getEntities((Class)clazz, except, box, (List)into, (Predicate)predicate); + } + + @Override + public List getEntitiesOfClass(Class entityClass, AABB box, Predicate predicate) { + List ret = new java.util.ArrayList<>(); + ((ServerLevel)this).getEntityLookup().getEntities(entityClass, null, box, ret, predicate); + return ret; + } + // Paper end } diff --git a/src/main/java/net/minecraft/world/level/LevelReader.java b/src/main/java/net/minecraft/world/level/LevelReader.java index a0ae26d6197e1069ca09982b4f8b706c55ae8491..32bfeb9aa87b43a9d2ce46dcc99dbd0ff355b412 100644 --- a/src/main/java/net/minecraft/world/level/LevelReader.java +++ b/src/main/java/net/minecraft/world/level/LevelReader.java @@ -26,6 +26,15 @@ public interface LevelReader extends BlockAndTintGetter, CollisionGetter, Signal @Nullable ChunkAccess getChunk(int chunkX, int chunkZ, ChunkStatus leastStatus, boolean create); + // Paper start - rewrite chunk system + default ChunkAccess syncLoadNonFull(int chunkX, int chunkZ, ChunkStatus status) { + if (status == null || status.isOrAfter(ChunkStatus.FULL)) { + throw new IllegalArgumentException("Status: " + status.toString()); + } + return this.getChunk(chunkX, chunkZ, status, true); + } + // Paper end - rewrite chunk system + @Nullable ChunkAccess getChunkIfLoadedImmediately(int x, int z); // Paper - ifLoaded api (we need this since current impl blocks if the chunk is loading) @Nullable default ChunkAccess getChunkIfLoadedImmediately(BlockPos pos) { return this.getChunkIfLoadedImmediately(pos.getX() >> 4, pos.getZ() >> 4);} diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java index c9cd18ce79a6ee7297a8fd14f4dbe712570b3ced..927bdebdb8ae01613f0cea074b3367bd7ffe9ab1 100644 --- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java +++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java @@ -120,7 +120,7 @@ public abstract class ChunkGenerator { return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("init_biomes", () -> { chunk.fillBiomesFromNoise(this.biomeSource, noiseConfig.sampler()); return chunk; - }), Util.backgroundExecutor()); + }), executor); // Paper - run with supplied executor } public abstract void applyCarvers(WorldGenRegion chunkRegion, long seed, RandomState noiseConfig, BiomeManager biomeAccess, StructureManager structureAccessor, ChunkAccess chunk, GenerationStep.Carving carverStep); @@ -315,7 +315,7 @@ public abstract class ChunkGenerator { return Pair.of(placement.getLocatePos(pos), holder); } - ChunkAccess ichunkaccess = world.getChunk(pos.x, pos.z, ChunkStatus.STRUCTURE_STARTS); + ChunkAccess ichunkaccess = world.syncLoadNonFull(pos.x, pos.z, ChunkStatus.STRUCTURE_STARTS); // Paper - rewrite chunk system structurestart = structureAccessor.getStartForStructure(SectionPos.bottomOf(ichunkaccess), (Structure) holder.value(), ichunkaccess); } while (structurestart == null); diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java index bac191f92ea3735df19c68d5568c2c7962c8680f..5d94aee1303d9eca5f1fa9a2e033ad0d12909635 100644 --- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java +++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java @@ -86,6 +86,7 @@ public class LevelChunk extends ChunkAccess { private final Int2ObjectMap gameEventListenerRegistrySections; private final LevelChunkTicks blockTicks; private final LevelChunkTicks fluidTicks; + public volatile FullChunkStatus chunkStatus = FullChunkStatus.INACCESSIBLE; // Paper - rewrite chunk system public LevelChunk(Level world, ChunkPos pos) { this(world, pos, UpgradeData.EMPTY, new LevelChunkTicks<>(), new LevelChunkTicks<>(), 0L, (LevelChunkSection[]) null, (LevelChunk.PostLoadProcessor) null, (BlendingData) null); @@ -690,9 +691,26 @@ public class LevelChunk extends ChunkAccess { } - // CraftBukkit start - public void loadCallback() { - // Paper start - neighbour cache + // Paper start - new load callbacks + private io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder; + public io.papermc.paper.chunk.system.scheduling.NewChunkHolder getChunkHolder() { + return this.chunkHolder; + } + + public void setChunkHolder(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + if (chunkHolder == null) { + throw new NullPointerException("Chunkholder cannot be null"); + } + if (this.chunkHolder != null) { + throw new IllegalStateException("Already have chunkholder: " + this.chunkHolder + ", cannot replace with " + chunkHolder); + } + this.chunkHolder = chunkHolder; + this.playerChunk = chunkHolder.vanillaChunkHolder; + } + + /* Note: We skip the light neighbour chunk loading done for the vanilla full chunk */ + /* Starlight does not need these chunks for lighting purposes because of edge checks */ + public void pushChunkIntoLoadedMap() { int chunkX = this.chunkPos.x; int chunkZ = this.chunkPos.z; net.minecraft.server.level.ServerChunkCache chunkProvider = this.level.getChunkSource(); @@ -707,10 +725,55 @@ public class LevelChunk extends ChunkAccess { } } this.setNeighbourLoaded(0, 0, this); + this.level.getChunkSource().addLoadedChunk(this); + } + + public void onChunkLoad(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + // figure out how this should interface with: + // the entity chunk load event // -> moved to the FULL status + // the chunk load event // -> stays here + // any entity add to world events // -> in FULL status + this.loadCallback(); + io.papermc.paper.chunk.system.ChunkSystem.onChunkBorder(this, chunkHolder.vanillaChunkHolder); + } + + public void onChunkUnload(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + // figure out how this should interface with: + // the entity chunk load event // -> moved to chunk unload to disk (not written yet) + // the chunk load event // -> stays here + // any entity add to world events // -> goes into the unload logic, it will completely explode + // etc later + this.unloadCallback(); + io.papermc.paper.chunk.system.ChunkSystem.onChunkNotBorder(this, chunkHolder.vanillaChunkHolder); + } + + public void onChunkTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + this.postProcessGeneration(); + this.level.startTickingChunk(this); + io.papermc.paper.chunk.system.ChunkSystem.onChunkTicking(this, chunkHolder.vanillaChunkHolder); + } + + public void onChunkNotTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + io.papermc.paper.chunk.system.ChunkSystem.onChunkNotTicking(this, chunkHolder.vanillaChunkHolder); + } + + public void onChunkEntityTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + io.papermc.paper.chunk.system.ChunkSystem.onChunkEntityTicking(this, chunkHolder.vanillaChunkHolder); + } + + public void onChunkNotEntityTicking(io.papermc.paper.chunk.system.scheduling.NewChunkHolder chunkHolder) { + io.papermc.paper.chunk.system.ChunkSystem.onChunkNotEntityTicking(this, chunkHolder.vanillaChunkHolder); + } + // Paper end - new load callbacks + + // CraftBukkit start + public void loadCallback() { + if (this.loadedTicketLevel) { LOGGER.error("Double calling chunk load!", new Throwable()); } // Paper + // Paper - rewrite chunk system - move into separate callback this.loadedTicketLevel = true; - // Paper end - neighbour cache + // Paper - rewrite chunk system - move into separate callback org.bukkit.Server server = this.level.getCraftServer(); - this.level.getChunkSource().addLoadedChunk(this); // Paper + // Paper - rewrite chunk system - move into separate callback if (server != null) { /* * If it's a new world, the first few chunks are generated inside @@ -719,6 +782,7 @@ public class LevelChunk extends ChunkAccess { */ org.bukkit.Chunk bukkitChunk = new org.bukkit.craftbukkit.CraftChunk(this); server.getPluginManager().callEvent(new org.bukkit.event.world.ChunkLoadEvent(bukkitChunk, this.needsDecoration)); + this.chunkHolder.getEntityChunk().callEntitiesLoadEvent(); // Paper - rewrite chunk system if (this.needsDecoration) { try (co.aikar.timings.Timing ignored = this.level.timings.chunkLoadPopulate.startTiming()) { // Paper @@ -747,9 +811,11 @@ public class LevelChunk extends ChunkAccess { } public void unloadCallback() { + if (!this.loadedTicketLevel) { LOGGER.error("Double calling chunk unload!", new Throwable()); } // Paper org.bukkit.Server server = this.level.getCraftServer(); + this.chunkHolder.getEntityChunk().callEntitiesUnloadEvent(); // Paper - rewrite chunk system org.bukkit.Chunk bukkitChunk = new org.bukkit.craftbukkit.CraftChunk(this); - org.bukkit.event.world.ChunkUnloadEvent unloadEvent = new org.bukkit.event.world.ChunkUnloadEvent(bukkitChunk, this.isUnsaved()); + org.bukkit.event.world.ChunkUnloadEvent unloadEvent = new org.bukkit.event.world.ChunkUnloadEvent(bukkitChunk, true); // Paper - rewrite chunk system - force save to true so that mustNotSave is correctly set below server.getPluginManager().callEvent(unloadEvent); // note: saving can be prevented, but not forced if no saving is actually required this.mustNotSave = !unloadEvent.isSaveChunk(); @@ -771,9 +837,26 @@ public class LevelChunk extends ChunkAccess { // Paper end } + // Paper start - add dirty system to tick lists + @Override + public void setUnsaved(boolean needsSaving) { + if (!needsSaving) { + this.blockTicks.clearDirty(); + this.fluidTicks.clearDirty(); + } + super.setUnsaved(needsSaving); + } + // Paper end - add dirty system to tick lists + @Override public boolean isUnsaved() { - return super.isUnsaved() && !this.mustNotSave; + // Paper start - add dirty system to tick lists + long gameTime = this.level.getLevelData().getGameTime(); + if (this.blockTicks.isDirty(gameTime) || this.fluidTicks.isDirty(gameTime)) { + return true; + } + // Paper end - add dirty system to tick lists + return super.isUnsaved(); // Paper - rewrite chunk system - do NOT clobber the dirty flag } // CraftBukkit end @@ -842,7 +925,9 @@ public class LevelChunk extends ChunkAccess { return this.blockEntities; } + public boolean isPostProcessingDone; // Paper - replace chunk loader system public void postProcessGeneration() { + try { // Paper - replace chunk loader system ChunkPos chunkcoordintpair = this.getPos(); for (int i = 0; i < this.postProcessing.length; ++i) { @@ -863,6 +948,7 @@ public class LevelChunk extends ChunkAccess { BlockState iblockdata1 = Block.updateFromNeighbourShapes(iblockdata, this.level, blockposition); this.level.setBlock(blockposition, iblockdata1, 20); + if (iblockdata1 != iblockdata) this.level.chunkSource.blockChanged(blockposition); // Paper - replace player chunk loader - notify since we send before processing full updates } } @@ -880,6 +966,10 @@ public class LevelChunk extends ChunkAccess { this.pendingBlockEntities.clear(); this.upgradeData.upgrade(this); + } finally { // Paper start - replace chunk loader system + this.isPostProcessingDone = true; + } + // Paper end - replace chunk loader system } @Nullable @@ -929,7 +1019,7 @@ public class LevelChunk extends ChunkAccess { } public FullChunkStatus getFullStatus() { - return this.fullStatus == null ? FullChunkStatus.FULL : (FullChunkStatus) this.fullStatus.get(); + return this.chunkHolder == null ? FullChunkStatus.INACCESSIBLE : this.chunkHolder.getChunkStatus(); // Paper - rewrite chunk system } public void setFullStatus(Supplier levelTypeProvider) { diff --git a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java index 95318092f8281d98132d1d3ceb4a5c36cf32eb05..68e1e3d525ee6cec23971eea431f22a535207b2b 100644 --- a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java +++ b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatus.java @@ -128,6 +128,29 @@ public class ChunkStatus { } } // Paper end - starlight + // Paper start - rewrite chunk system + public boolean isParallelCapable; // Paper + public int writeRadius = -1; + public int loadRange = 0; + + protected static final java.util.List statuses = new java.util.ArrayList<>(); + + private ChunkStatus nextStatus; + + public final ChunkStatus getNextStatus() { + return this.nextStatus; + } + + public final boolean isEmptyLoadStatus() { + return this.loadingTask == PASSTHROUGH_LOAD_TASK; // TODO fix this + } + + public final boolean isEmptyGenStatus() { + return this == ChunkStatus.EMPTY; + } + + public final java.util.concurrent.atomic.AtomicBoolean warnedAboutNoImmediateComplete = new java.util.concurrent.atomic.AtomicBoolean(); + // Paper end - rewrite chunk system private static ChunkStatus register( String id, @@ -190,6 +213,13 @@ public class ChunkStatus { this.chunkType = chunkType; this.heightmapsAfter = heightMapTypes; this.index = previous == null ? 0 : previous.getIndex() + 1; + // Paper start + this.nextStatus = this; + if (statuses.size() > 0) { + statuses.get(statuses.size() - 1).nextStatus = this; + } + statuses.add(this); + // Paper end } public int getIndex() { diff --git a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java index ce7f154b9dad4e78ee0189405cf57dcb3d5301b8..f095704157653f30615c92a8d6f2900fe1721360 100644 --- a/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java +++ b/src/main/java/net/minecraft/world/level/chunk/status/ChunkStatusTasks.java @@ -113,11 +113,11 @@ public class ChunkStatusTasks { } static CompletableFuture generateInitializeLight(WorldGenContext context, ChunkStatus status, Executor executor, ToFullChunk fullChunkConverter, List chunks, ChunkAccess chunk) { - return ChunkStatusTasks.initializeLight(context.lightEngine(), chunk); + return CompletableFuture.completedFuture(chunk); // Paper - rewrite chunk system } static CompletableFuture loadInitializeLight(WorldGenContext context, ChunkStatus status, ToFullChunk fullChunkConverter, ChunkAccess chunk) { - return ChunkStatusTasks.initializeLight(context.lightEngine(), chunk); + return CompletableFuture.completedFuture(chunk); // Paper - rewrite chunk system } private static CompletableFuture initializeLight(ThreadedLevelLightEngine lightingProvider, ChunkAccess chunk) { diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java index 01d6b8683a9fa30d05b03ebfef8ee2dca4e83a56..b2e8082dda0d0ca32bfc32cbf9d8ae9822febc30 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java @@ -112,6 +112,17 @@ public class ChunkSerializer { } } // Paper end - guard against serializing mismatching coordinates + // Paper start - rewrite chunk system + public static final class InProgressChunkHolder { + + public final ProtoChunk protoChunk; + + public CompoundTag poiData; + + public InProgressChunkHolder(final ProtoChunk protoChunk) { + this.protoChunk = protoChunk; + } + } public static ProtoChunk read(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt) { // Paper start - Do not let the server load chunks from newer versions if (nbt.contains("DataVersion", net.minecraft.nbt.Tag.TAG_ANY_NUMERIC)) { @@ -122,6 +133,12 @@ public class ChunkSerializer { } } // Paper end - Do not let the server load chunks from newer versions + InProgressChunkHolder holder = readInProgressChunkHolder(world, poiStorage, chunkPos, nbt); + return holder.protoChunk; + } + + public static InProgressChunkHolder readInProgressChunkHolder(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt) { + // Paper end - rewrite chunk system ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - guard against serializing mismatching coordinates; diff on change, see ChunkSerializer#getChunkCoordinate if (!Objects.equals(chunkPos, chunkcoordintpair1)) { @@ -178,7 +195,7 @@ public class ChunkSerializer { achunksection[k] = chunksection; SectionPos sectionposition = SectionPos.of(chunkPos, b0); - poiStorage.checkConsistencyWithBlocks(sectionposition, chunksection); + // Paper - rewrite chunk system - moved to final load stage } boolean flag3 = nbttagcompound1.contains("BlockLight", 7); @@ -325,7 +342,7 @@ public class ChunkSerializer { } if (chunktype == ChunkType.LEVELCHUNK) { - return new ImposterProtoChunk((LevelChunk) object1, false); + return new InProgressChunkHolder(new ImposterProtoChunk((LevelChunk) object1, false)); // Paper - Async chunk loading } else { ProtoChunk protochunk1 = (ProtoChunk) object1; @@ -360,9 +377,41 @@ public class ChunkSerializer { protochunk1.setCarvingMask(worldgenstage_features, new CarvingMask(nbttagcompound5.getLongArray(s1), ((ChunkAccess) object1).getMinBuildHeight())); } - return protochunk1; + return new InProgressChunkHolder(protochunk1); // Paper - Async chunk loading + } + } + + // Paper start - async chunk save for unload + public record AsyncSaveData( + Tag blockTickList, // non-null if we had to go to the server's tick list + Tag fluidTickList, // non-null if we had to go to the server's tick list + ListTag blockEntities, + long worldTime + ) {} + + // must be called sync + public static AsyncSaveData getAsyncSaveData(ServerLevel world, ChunkAccess chunk) { + org.spigotmc.AsyncCatcher.catchOp("preparation of chunk data for async save"); + + final CompoundTag tickLists = new CompoundTag(); + ChunkSerializer.saveTicks(world, tickLists, chunk.getTicksForSerialization()); + + ListTag blockEntitiesSerialized = new ListTag(); + for (final BlockPos blockPos : chunk.getBlockEntitiesPos()) { + final CompoundTag blockEntityNbt = chunk.getBlockEntityNbtForSaving(blockPos, world.registryAccess()); + if (blockEntityNbt != null) { + blockEntitiesSerialized.add(blockEntityNbt); + } } + + return new AsyncSaveData( + tickLists.get(BLOCK_TICKS_TAG), + tickLists.get(FLUID_TICKS_TAG), + blockEntitiesSerialized, + world.getGameTime() + ); } + // Paper end private static void logErrors(ChunkPos chunkPos, int y, String message) { ChunkSerializer.LOGGER.error("Recoverable errors when loading section [" + chunkPos.x + ", " + y + ", " + chunkPos.z + "]: " + message); @@ -379,6 +428,11 @@ public class ChunkSerializer { // CraftBukkit end public static CompoundTag write(ServerLevel world, ChunkAccess chunk) { + // Paper start + return saveChunk(world, chunk, null); + } + public static CompoundTag saveChunk(ServerLevel world, ChunkAccess chunk, @org.checkerframework.checker.nullness.qual.Nullable AsyncSaveData asyncsavedata) { + // Paper end // Paper start - rewrite light impl final int minSection = io.papermc.paper.util.WorldUtil.getMinLightSection(world); final int maxSection = io.papermc.paper.util.WorldUtil.getMaxLightSection(world); @@ -391,7 +445,7 @@ public class ChunkSerializer { nbttagcompound.putInt("xPos", chunkcoordintpair.x); nbttagcompound.putInt("yPos", chunk.getMinSection()); nbttagcompound.putInt("zPos", chunkcoordintpair.z); - nbttagcompound.putLong("LastUpdate", world.getGameTime()); + nbttagcompound.putLong("LastUpdate", asyncsavedata != null ? asyncsavedata.worldTime : world.getGameTime()); // Paper - async chunk unloading nbttagcompound.putLong("InhabitedTime", chunk.getInhabitedTime()); nbttagcompound.putString("Status", BuiltInRegistries.CHUNK_STATUS.getKey(chunk.getStatus()).toString()); BlendingData blendingdata = chunk.getBlendingData(); @@ -485,8 +539,17 @@ public class ChunkSerializer { nbttagcompound.putBoolean("isLightOn", false); // Paper - set to false but still store, this allows us to detect --eraseCache (as eraseCache _removes_) } - ListTag nbttaglist1 = new ListTag(); - Iterator iterator = chunk.getBlockEntitiesPos().iterator(); + // Paper start + ListTag nbttaglist1; + Iterator iterator; + if (asyncsavedata != null) { + nbttaglist1 = asyncsavedata.blockEntities; + iterator = java.util.Collections.emptyIterator(); + } else { + nbttaglist1 = new ListTag(); + iterator = chunk.getBlockEntitiesPos().iterator(); + } + // Paper end CompoundTag nbttagcompound2; @@ -522,7 +585,14 @@ public class ChunkSerializer { nbttagcompound.put("CarvingMasks", nbttagcompound2); } + // Paper start + if (asyncsavedata != null) { + nbttagcompound.put(BLOCK_TICKS_TAG, asyncsavedata.blockTickList); + nbttagcompound.put(FLUID_TICKS_TAG, asyncsavedata.fluidTickList); + } else { ChunkSerializer.saveTicks(world, nbttagcompound, chunk.getTicksForSerialization()); + } + // Paper end nbttagcompound.put("PostProcessing", ChunkSerializer.packOffsets(chunk.getPostProcessing())); CompoundTag nbttagcompound3 = new CompoundTag(); Iterator iterator1 = chunk.getHeightmaps().iterator(); @@ -578,7 +648,7 @@ public class ChunkSerializer { return nbttaglist == null && nbttaglist1 == null ? null : (chunk) -> { if (nbttaglist != null) { - world.addLegacyChunkEntities(EntityType.loadEntitiesRecursive(nbttaglist, world)); + world.addLegacyChunkEntities(EntityType.loadEntitiesRecursive(nbttaglist, world), chunk.getPos()); // Paper - rewrite chunk system } if (nbttaglist1 != null) { diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java index a62c90e10c0dfa4c6211a05c4071932756d7b218..554dede2ad0e45d3ee4ccc5510b7644f2e9e4250 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java @@ -31,18 +31,21 @@ import net.minecraft.world.level.storage.DimensionDataStorage; public class ChunkStorage implements AutoCloseable { public static final int LAST_MONOLYTH_STRUCTURE_DATA_VERSION = 1493; - private final IOWorker worker; + // Paper start - rewrite chunk system; async chunk IO + private final Object persistentDataLock = new Object(); + public final RegionFileStorage regionFileCache; + // Paper end - rewrite chunk system protected final DataFixer fixerUpper; @Nullable private volatile LegacyStructureDataHandler legacyStructureHandler; public ChunkStorage(RegionStorageInfo storageKey, Path directory, DataFixer dataFixer, boolean dsync) { this.fixerUpper = dataFixer; - this.worker = new IOWorker(storageKey, directory, dsync); + this.regionFileCache = new RegionFileStorage(storageKey, directory, dsync); // Paper - rewrite chunk system; async chunk IO } public boolean isOldChunkAround(ChunkPos chunkPos, int checkRadius) { - return this.worker.isOldChunkAround(chunkPos, checkRadius); + return true; // Paper - rewrite chunk system } // CraftBukkit start @@ -50,8 +53,9 @@ public class ChunkStorage implements AutoCloseable { if (true) return true; // Paper - Perf: this isn't even needed anymore, light is purged updating to 1.14+, why are we holding up the conversion process reading chunk data off disk - return true, we need to set light populated to true so the converter recognizes the chunk as being "full" ChunkPos pos = new ChunkPos(x, z); if (cps != null) { - com.google.common.base.Preconditions.checkState(org.bukkit.Bukkit.isPrimaryThread(), "primary thread"); - if (cps.hasChunk(x, z)) { + // Paper start - rewrite chunk system; async chunk IO + if (cps.getChunkAtIfCachedImmediately(x, z) != null) { // isLoaded is a ticket level check, not a chunk loaded check! + // Paper end - rewrite chunk system return true; } } @@ -79,6 +83,7 @@ public class ChunkStorage implements AutoCloseable { public CompoundTag upgradeChunkTag(ResourceKey resourcekey, Supplier supplier, CompoundTag nbttagcompound, Optional>> optional, ChunkPos pos, @Nullable LevelAccessor generatoraccess) { // CraftBukkit end + nbttagcompound = nbttagcompound.copy(); // Paper - defensive copy, another thread might modify this int i = ChunkStorage.getVersion(nbttagcompound); try { @@ -97,9 +102,11 @@ public class ChunkStorage implements AutoCloseable { if (i < 1493) { ca.spottedleaf.dataconverter.minecraft.MCDataConverter.convertTag(ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry.CHUNK, nbttagcompound, i, 1493); // Paper - replace chunk converter if (nbttagcompound.getCompound("Level").getBoolean("hasLegacyStructureData")) { + synchronized (this.persistentDataLock) { // Paper - Async chunk loading LegacyStructureDataHandler persistentstructurelegacy = this.getLegacyStructureHandler(resourcekey, supplier); nbttagcompound = persistentstructurelegacy.updateFromLegacy(nbttagcompound); + } // Paper - Async chunk loading } } @@ -139,7 +146,7 @@ public class ChunkStorage implements AutoCloseable { LegacyStructureDataHandler persistentstructurelegacy = this.legacyStructureHandler; if (persistentstructurelegacy == null) { - synchronized (this) { + synchronized (this.persistentDataLock) { // Paper - async chunk loading persistentstructurelegacy = this.legacyStructureHandler; if (persistentstructurelegacy == null) { this.legacyStructureHandler = persistentstructurelegacy = LegacyStructureDataHandler.getLegacyStructureHandler(worldKey, (DimensionDataStorage) stateManagerGetter.get()); @@ -165,10 +172,20 @@ public class ChunkStorage implements AutoCloseable { } public CompletableFuture> read(ChunkPos chunkPos) { - return this.worker.loadAsync(chunkPos); + // Paper start - async chunk io + try { + return CompletableFuture.completedFuture(Optional.ofNullable(this.readSync(chunkPos))); + } catch (Throwable thr) { + return CompletableFuture.failedFuture(thr); + } + } + @Nullable + public CompoundTag readSync(ChunkPos chunkPos) throws IOException { + return this.regionFileCache.read(chunkPos); } + // Paper end - async chunk io - public CompletableFuture write(ChunkPos chunkPos, CompoundTag nbt) { + public CompletableFuture write(ChunkPos chunkPos, CompoundTag nbt) throws IOException { // Paper - rewrite chunk system; async chunk io // Paper start - guard against serializing mismatching coordinates if (nbt != null && !chunkPos.equals(ChunkSerializer.getChunkCoordinate(nbt))) { final String world = (this instanceof net.minecraft.server.level.ChunkMap) ? ((net.minecraft.server.level.ChunkMap) this).level.getWorld().getName() : null; @@ -176,26 +193,39 @@ public class ChunkStorage implements AutoCloseable { + " but compound says coordinate is " + ChunkSerializer.getChunkCoordinate(nbt) + (world == null ? " for an unknown world" : (" for world: " + world))); } // Paper end - guard against serializing mismatching coordinates + this.regionFileCache.write(chunkPos, nbt); // Paper - rewrite chunk system; async chunk io, move above legacy structure index this.handleLegacyStructureIndex(chunkPos); - return this.worker.store(chunkPos, nbt); + // Paper - rewrite chunk system; async chunk io, move above legacy structure index + return null; } protected void handleLegacyStructureIndex(ChunkPos chunkPos) { if (this.legacyStructureHandler != null) { + synchronized (this.persistentDataLock) { // Paper - rewrite chunk system; async chunk io this.legacyStructureHandler.removeIndex(chunkPos.toLong()); + } // Paper - rewrite chunk system; async chunk io } } public void flushWorker() { - this.worker.synchronize(true).join(); + io.papermc.paper.chunk.system.io.RegionFileIOThread.flush(); // Paper - rewrite chunk system } public void close() throws IOException { - this.worker.close(); + this.regionFileCache.close(); // Paper - nuke IO worker } public ChunkScanAccess chunkScanner() { - return this.worker; + // Paper start - nuke IO worker + return ((chunkPos, streamTagVisitor) -> { + try { + this.regionFileCache.scanChunk(chunkPos, streamTagVisitor); + return java.util.concurrent.CompletableFuture.completedFuture(null); + } catch (IOException e) { + throw new RuntimeException(e); + } + }); + // Paper end } } diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java index 49d8a62d2b6ca6da4e02b3cec7e42c38b7781b57..9fdf8f857a5f9b231c6d0633eaba498244214f74 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/EntityStorage.java @@ -27,43 +27,30 @@ public class EntityStorage implements EntityPersistentStorage { private static final String ENTITIES_TAG = "Entities"; private static final String POSITION_TAG = "Position"; public final ServerLevel level; - private final SimpleRegionStorage simpleRegionStorage; + // Paper - rewrite chunk system private final LongSet emptyChunks = new LongOpenHashSet(); - public final ProcessorMailbox entityDeserializerQueue; + // Paper - rewrite chunk system public EntityStorage(SimpleRegionStorage storage, ServerLevel world, Executor executor) { - this.simpleRegionStorage = storage; + // Paper - rewrite chunk system this.level = world; - this.entityDeserializerQueue = ProcessorMailbox.create(executor, "entity-deserializer"); + // Paper - rewrite chunk system } @Override public CompletableFuture> loadEntities(ChunkPos pos) { - return this.emptyChunks.contains(pos.toLong()) - ? CompletableFuture.completedFuture(emptyChunk(pos)) - : this.simpleRegionStorage.read(pos).thenApplyAsync(nbt -> { - if (nbt.isEmpty()) { - this.emptyChunks.add(pos.toLong()); - return emptyChunk(pos); - } else { - try { - ChunkPos chunkPos2 = readChunkPos(nbt.get()); - if (!Objects.equals(pos, chunkPos2)) { - LOGGER.error("Chunk file at {} is in the wrong location. (Expected {}, got {})", pos, pos, chunkPos2); - } - } catch (Exception var6) { - LOGGER.warn("Failed to parse chunk {} position info", pos, var6); - } - - CompoundTag compoundTag = this.simpleRegionStorage.upgradeChunkTag(nbt.get(), -1); - ListTag listTag = compoundTag.getList("Entities", 10); - List list = EntityType.loadEntitiesRecursive(listTag, this.level).collect(ImmutableList.toImmutableList()); - return new ChunkEntities<>(pos, list); - } - }, this.entityDeserializerQueue::tell); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system - copy out read logic into readEntities } - private static ChunkPos readChunkPos(CompoundTag chunkNbt) { + // Paper start - rewrite chunk system + public static List readEntities(ServerLevel level, CompoundTag compoundTag) { + ListTag listTag = compoundTag.getList("Entities", 10); + List list = EntityType.loadEntitiesRecursive(listTag, level).collect(ImmutableList.toImmutableList()); + return list; + } + // Paper end - rewrite chunk system + + public static ChunkPos readChunkPos(CompoundTag chunkNbt) { // Paper - public int[] is = chunkNbt.getIntArray("Position"); return new ChunkPos(is[0], is[1]); } @@ -78,38 +65,74 @@ public class EntityStorage implements EntityPersistentStorage { @Override public void storeEntities(ChunkEntities dataList) { + // Paper start - rewrite chunk system + if (true) { + throw new UnsupportedOperationException(); + } + // Paper end - rewrite chunk system ChunkPos chunkPos = dataList.getPos(); if (dataList.isEmpty()) { if (this.emptyChunks.add(chunkPos.toLong())) { - this.simpleRegionStorage.write(chunkPos, null); + // Paper - rewrite chunk system - fix compile for unused field in dead code } } else { - ListTag listTag = new ListTag(); - dataList.getEntities().forEach(entity -> { - CompoundTag compoundTagx = new CompoundTag(); - if (entity.save(compoundTagx)) { - listTag.add(compoundTagx); - } - }); - CompoundTag compoundTag = NbtUtils.addCurrentDataVersion(new CompoundTag()); - compoundTag.put("Entities", listTag); - writeChunkPos(compoundTag, chunkPos); - this.simpleRegionStorage.write(chunkPos, compoundTag).exceptionally(ex -> { - LOGGER.error("Failed to store chunk {}", chunkPos, ex); - return null; - }); + // Paper - move into saveEntityChunk0 this.emptyChunks.remove(chunkPos.toLong()); } } + // Paper start - rewrite chunk system + public static void copyEntities(final CompoundTag from, final CompoundTag into) { + if (from == null) { + return; + } + final ListTag entitiesFrom = from.getList("Entities", net.minecraft.nbt.Tag.TAG_COMPOUND); + if (entitiesFrom == null || entitiesFrom.isEmpty()) { + return; + } + + final ListTag entitiesInto = into.getList("Entities", net.minecraft.nbt.Tag.TAG_COMPOUND); + into.put("Entities", entitiesInto); // this is in case into doesn't have any entities + entitiesInto.addAll(0, entitiesFrom.copy()); // need to copy, this is coming from the save thread + } + + public static CompoundTag saveEntityChunk(List entities, ChunkPos chunkPos, ServerLevel level) { + return saveEntityChunk0(entities, chunkPos, level, false); + } + private static CompoundTag saveEntityChunk0(List entities, ChunkPos chunkPos, ServerLevel level, boolean force) { + if (!force && entities.isEmpty()) { + return null; + } + + ListTag listTag = new ListTag(); + entities.forEach((entity) -> { // diff here: use entities parameter + CompoundTag compoundTag = new CompoundTag(); + if (entity.save(compoundTag)) { + listTag.add(compoundTag); + } + + }); + CompoundTag compoundTag = NbtUtils.addCurrentDataVersion(new CompoundTag()); + compoundTag.put("Entities", listTag); + writeChunkPos(compoundTag, chunkPos); + // Paper - remove worker usage + + return !force && listTag.isEmpty() ? null : compoundTag; + } + + public static CompoundTag upgradeChunkTag(CompoundTag chunkNbt) { + int i = NbtUtils.getDataVersion(chunkNbt, -1); + return ca.spottedleaf.dataconverter.minecraft.MCDataConverter.convertTag(ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry.ENTITY_CHUNK, chunkNbt, i, net.minecraft.SharedConstants.getCurrentVersion().getDataVersion().getVersion()); + } + // Paper end - rewrite chunk system + @Override public void flush(boolean sync) { - this.simpleRegionStorage.synchronize(sync).join(); - this.entityDeserializerQueue.runAll(); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } @Override public void close() throws IOException { - this.simpleRegionStorage.close(); + throw new UnsupportedOperationException(); // Paper - rewrite chunk system } } diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java index e858436bcf1b234d4bc6e6a117f5224d5c2d9f90..307196b2a58d4f8db3e6e3c3517a8004d4908b13 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java @@ -48,6 +48,7 @@ public class RegionFile implements AutoCloseable { private final IntBuffer timestamps; @VisibleForTesting protected final RegionBitmap usedSectors; + public final java.util.concurrent.locks.ReentrantLock fileLock = new java.util.concurrent.locks.ReentrantLock(); // Paper public RegionFile(RegionStorageInfo storageKey, Path directory, Path path, boolean dsync) throws IOException { this(storageKey, directory, path, RegionFileVersion.getCompressionFormat(), dsync); // Paper - Configurable region compression format @@ -250,7 +251,7 @@ public class RegionFile implements AutoCloseable { return (byteCount + 4096 - 1) / 4096; } - public boolean doesChunkExist(ChunkPos pos) { + public synchronized boolean doesChunkExist(ChunkPos pos) { // Paper - synchronized int i = this.getOffset(pos); if (i == 0) { @@ -417,6 +418,11 @@ public class RegionFile implements AutoCloseable { } public void close() throws IOException { + // Paper start - Prevent regionfiles from being closed during use + this.fileLock.lock(); + synchronized (this) { + try { + // Paper end try { this.padToFullSector(); } finally { @@ -426,6 +432,10 @@ public class RegionFile implements AutoCloseable { this.file.close(); } } + } finally { // Paper start - Prevent regionfiles from being closed during use + this.fileLock.unlock(); + } + } // Paper end } diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java index c4eef3aade889c69cefd873bec2d031cc54103ea..3f6955be976064eb542b5c50a9d6d74457c1833c 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java @@ -26,31 +26,99 @@ public class RegionFileStorage implements AutoCloseable { private final Path folder; private final boolean sync; - RegionFileStorage(RegionStorageInfo storageKey, Path directory, boolean dsync) { + // Paper start - cache regionfile does not exist state + static final int MAX_NON_EXISTING_CACHE = 1024 * 64; + private final it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet nonExistingRegionFiles = new it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet(); + private synchronized boolean doesRegionFilePossiblyExist(long position) { + if (this.nonExistingRegionFiles.contains(position)) { + this.nonExistingRegionFiles.addAndMoveToFirst(position); + return false; + } + return true; + } + + private synchronized void createRegionFile(long position) { + this.nonExistingRegionFiles.remove(position); + } + + private synchronized void markNonExisting(long position) { + if (this.nonExistingRegionFiles.addAndMoveToFirst(position)) { + while (this.nonExistingRegionFiles.size() >= MAX_NON_EXISTING_CACHE) { + this.nonExistingRegionFiles.removeLastLong(); + } + } + } + + public synchronized boolean doesRegionFileNotExistNoIO(ChunkPos pos) { + long key = ChunkPos.asLong(pos.getRegionX(), pos.getRegionZ()); + return !this.doesRegionFilePossiblyExist(key); + } + // Paper end - cache regionfile does not exist state + + protected RegionFileStorage(RegionStorageInfo storageKey, Path directory, boolean dsync) { // Paper - protected constructor this.folder = directory; this.sync = dsync; this.info = storageKey; } - private RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit - long i = ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ()); + // Paper start + public synchronized RegionFile getRegionFileIfLoaded(ChunkPos chunkcoordintpair) { + return this.regionCache.getAndMoveToFirst(ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ())); + } + + public synchronized boolean chunkExists(ChunkPos pos) throws IOException { + RegionFile regionfile = getRegionFile(pos, true); + + return regionfile != null ? regionfile.hasChunk(pos) : false; + } + + public synchronized RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly) throws IOException { // CraftBukkit + return this.getRegionFile(chunkcoordintpair, existingOnly, false); + } + public synchronized RegionFile getRegionFile(ChunkPos chunkcoordintpair, boolean existingOnly, boolean lock) throws IOException { + // Paper end + long i = ChunkPos.asLong(chunkcoordintpair.getRegionX(), chunkcoordintpair.getRegionZ()); final long regionPos = i; // Paper - OBFHELPER RegionFile regionfile = (RegionFile) this.regionCache.getAndMoveToFirst(i); if (regionfile != null) { + // Paper start + if (lock) { + // must be in this synchronized block + regionfile.fileLock.lock(); + } + // Paper end return regionfile; } else { + // Paper start - cache regionfile does not exist state + if (existingOnly && !this.doesRegionFilePossiblyExist(regionPos)) { + return null; + } + // Paper end - cache regionfile does not exist state if (this.regionCache.size() >= io.papermc.paper.configuration.GlobalConfiguration.get().misc.regionFileCacheSize) { // Paper - Sanitise RegionFileCache and make configurable ((RegionFile) this.regionCache.removeLast()).close(); } - FileUtil.createDirectoriesSafe(this.folder); + // Paper - only create directory if not existing only - moved down Path path = this.folder; int j = chunkcoordintpair.getRegionX(); Path path1 = path.resolve("r." + j + "." + chunkcoordintpair.getRegionZ() + ".mca"); - if (existingOnly && !java.nio.file.Files.exists(path1)) return null; // CraftBukkit + if (existingOnly && !java.nio.file.Files.exists(path1)) { // Paper start - cache regionfile does not exist state + this.markNonExisting(regionPos); + return null; // CraftBukkit + } else { + this.createRegionFile(regionPos); + } + // Paper end - cache regionfile does not exist state + FileUtil.createDirectoriesSafe(this.folder); // Paper - only create directory if not existing only - moved from above RegionFile regionfile1 = new RegionFile(this.info, path1, this.folder, this.sync); this.regionCache.putAndMoveToFirst(i, regionfile1); + // Paper start + if (lock) { + // must be in this synchronized block + regionfile1.fileLock.lock(); + } + // Paper end return regionfile1; } } @@ -58,11 +126,12 @@ public class RegionFileStorage implements AutoCloseable { @Nullable public CompoundTag read(ChunkPos pos) throws IOException { // CraftBukkit start - SPIGOT-5680: There's no good reason to preemptively create files on read, save that for writing - RegionFile regionfile = this.getRegionFile(pos, true); + RegionFile regionfile = this.getRegionFile(pos, true, true); // Paper if (regionfile == null) { return null; } // CraftBukkit end + try { // Paper DataInputStream datainputstream = regionfile.getChunkDataInputStream(pos); CompoundTag nbttagcompound; @@ -99,6 +168,9 @@ public class RegionFileStorage implements AutoCloseable { } return nbttagcompound; + } finally { // Paper start + regionfile.fileLock.unlock(); + } // Paper end } public void scanChunk(ChunkPos chunkPos, StreamTagVisitor scanner) throws IOException { @@ -133,7 +205,13 @@ public class RegionFileStorage implements AutoCloseable { } protected void write(ChunkPos pos, @Nullable CompoundTag nbt) throws IOException { - RegionFile regionfile = this.getRegionFile(pos, false); // CraftBukkit + // Paper start - rewrite chunk system + RegionFile regionfile = this.getRegionFile(pos, nbt == null, true); // CraftBukkit + if (nbt == null && regionfile == null) { + return; + } + try { // Try finally to unlock the region file + // Paper end - rewrite chunk system // Paper start - Chunk save reattempt int attempts = 0; Exception lastException = null; @@ -179,9 +257,14 @@ public class RegionFileStorage implements AutoCloseable { net.minecraft.server.MinecraftServer.LOGGER.error("Failed to save chunk {}", pos, lastException); } // Paper end - Chunk save reattempt + // Paper start - rewrite chunk system + } finally { + regionfile.fileLock.unlock(); + } + // Paper end - rewrite chunk system } - public void close() throws IOException { + public synchronized void close() throws IOException { // Paper -> synchronized ExceptionCollector exceptionsuppressor = new ExceptionCollector<>(); ObjectIterator objectiterator = this.regionCache.values().iterator(); @@ -198,7 +281,7 @@ public class RegionFileStorage implements AutoCloseable { exceptionsuppressor.throwIfPresent(); } - public void flush() throws IOException { + public synchronized void flush() throws IOException { // Paper - synchronize ObjectIterator objectiterator = this.regionCache.values().iterator(); while (objectiterator.hasNext()) { diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java index 151fcbca34e02783e19fbb7b54ec4fbec2eed190..883fbe5c81e3be27007a1a0489f80ba1863e5a04 100644 --- a/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java +++ b/src/main/java/net/minecraft/world/level/chunk/storage/SectionStorage.java @@ -12,6 +12,7 @@ import it.unimi.dsi.fastutil.longs.Long2ObjectMap; import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap; import it.unimi.dsi.fastutil.longs.LongLinkedOpenHashSet; import java.io.IOException; +import java.nio.file.Path; import java.util.Map; import java.util.Optional; import java.util.concurrent.CompletableFuture; @@ -31,25 +32,30 @@ import net.minecraft.world.level.ChunkPos; import net.minecraft.world.level.LevelHeightAccessor; import org.slf4j.Logger; -public class SectionStorage implements AutoCloseable { +public class SectionStorage extends RegionFileStorage implements AutoCloseable { // Paper - nuke IOWorker private static final Logger LOGGER = LogUtils.getLogger(); private static final String SECTIONS_TAG = "Sections"; - private final SimpleRegionStorage simpleRegionStorage; + // Paper - remove mojang I/O thread private final Long2ObjectMap> storage = new Long2ObjectOpenHashMap<>(); private final LongLinkedOpenHashSet dirty = new LongLinkedOpenHashSet(); private final Function> codec; private final Function factory; - private final RegistryAccess registryAccess; + public final RegistryAccess registryAccess; // Paper - rewrite chunk system - public protected final LevelHeightAccessor levelHeightAccessor; public SectionStorage( + // Paper start + RegionStorageInfo regionStorageInfo, + Path path, + boolean dsync, + // Paper end SimpleRegionStorage storageAccess, Function> codecFactory, Function factory, RegistryAccess registryManager, LevelHeightAccessor world ) { - this.simpleRegionStorage = storageAccess; + super(regionStorageInfo, path, dsync); // Paper - remove mojang I/O thread this.codec = codecFactory; this.factory = factory; this.registryAccess = registryManager; @@ -112,23 +118,21 @@ public class SectionStorage implements AutoCloseable { } private void readColumn(ChunkPos pos) { - Optional optional = this.tryRead(pos).join(); - RegistryOps registryOps = this.registryAccess.createSerializationContext(NbtOps.INSTANCE); - this.readColumn(pos, registryOps, optional.orElse(null)); + throw new IllegalStateException("Only chunk system can load in state, offending class:" + this.getClass().getName()); // Paper - rewrite chunk system } private CompletableFuture> tryRead(ChunkPos pos) { - return this.simpleRegionStorage.read(pos).exceptionally(throwable -> { - if (throwable instanceof IOException iOException) { - LOGGER.error("Error reading chunk {} data from disk", pos, iOException); - return Optional.empty(); - } else { - throw new CompletionException(throwable); - } - }); + // Paper start - rewrite chunk system + try { + return CompletableFuture.completedFuture(Optional.ofNullable(this.read(pos))); + } catch (Throwable thr) { + return CompletableFuture.failedFuture(thr); + } + // Paper end - rewrite chunk system } private void readColumn(ChunkPos pos, RegistryOps ops, @Nullable CompoundTag nbt) { + if (true) throw new IllegalStateException("Only chunk system can load in state, offending class:" + this.getClass().getName()); // Paper - rewrite chunk system if (nbt == null) { for (int i = this.levelHeightAccessor.getMinSection(); i < this.levelHeightAccessor.getMaxSection(); i++) { this.storage.put(getKey(pos, i), Optional.empty()); @@ -138,7 +142,7 @@ public class SectionStorage implements AutoCloseable { int j = getVersion(dynamic); int k = SharedConstants.getCurrentVersion().getDataVersion().getVersion(); boolean bl = j != k; - Dynamic dynamic2 = this.simpleRegionStorage.upgradeChunkTag(dynamic, j); + Dynamic dynamic2 = null; // Paper - rewrite chunk system OptionalDynamic optionalDynamic = dynamic2.get("Sections"); for (int l = this.levelHeightAccessor.getMinSection(); l < this.levelHeightAccessor.getMaxSection(); l++) { @@ -162,7 +166,7 @@ public class SectionStorage implements AutoCloseable { Dynamic dynamic = this.writeColumn(pos, registryOps); Tag tag = dynamic.getValue(); if (tag instanceof CompoundTag) { - this.simpleRegionStorage.write(pos, (CompoundTag)tag); + try { this.write(pos, (CompoundTag)tag); } catch (IOException ex) { SectionStorage.LOGGER.error("Error writing poi chunk data to disk for chunk " + pos, ex); } // Paper - nuke IOWorker } else { LOGGER.error("Expected compound tag, got {}", tag); } @@ -212,7 +216,7 @@ public class SectionStorage implements AutoCloseable { } private static int getVersion(Dynamic dynamic) { - return dynamic.get("DataVersion").asInt(1945); + return dynamic.get("DataVersion").asInt(1945); // Paper - diff on change, constant used in ChunkLoadTask } public void flush(ChunkPos pos) { @@ -229,6 +233,6 @@ public class SectionStorage implements AutoCloseable { @Override public void close() throws IOException { - this.simpleRegionStorage.close(); + super.close(); // Paper - nuke I/O worker - don't call the worker } } diff --git a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java index 74a285b8b018a9c94ccea519f1ce8b9e2ef3cb64..83a39f900551e39d5af6f17a339a386ddee4feef 100644 --- a/src/main/java/net/minecraft/world/level/entity/EntityTickList.java +++ b/src/main/java/net/minecraft/world/level/entity/EntityTickList.java @@ -9,52 +9,41 @@ import javax.annotation.Nullable; import net.minecraft.world.entity.Entity; public class EntityTickList { - private Int2ObjectMap active = new Int2ObjectLinkedOpenHashMap<>(); - private Int2ObjectMap passive = new Int2ObjectLinkedOpenHashMap<>(); - @Nullable - private Int2ObjectMap iterated; + private final io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet entities = new io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet<>(true); // Paper - rewrite this, always keep this updated - why would we EVER tick an entity that's not ticking? private void ensureActiveIsNotIterated() { - if (this.iterated == this.active) { - this.passive.clear(); - - for (Entry entry : Int2ObjectMaps.fastIterable(this.active)) { - this.passive.put(entry.getIntKey(), entry.getValue()); - } - - Int2ObjectMap int2ObjectMap = this.active; - this.active = this.passive; - this.passive = int2ObjectMap; - } + // Paper - replace with better logic, do not delay removals } public void add(Entity entity) { + io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist addition"); // Paper this.ensureActiveIsNotIterated(); - this.active.put(entity.getId(), entity); + this.entities.add(entity); // Paper - replace with better logic, do not delay removals/additions } public void remove(Entity entity) { + io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist removal"); // Paper this.ensureActiveIsNotIterated(); - this.active.remove(entity.getId()); + this.entities.remove(entity); // Paper - replace with better logic, do not delay removals/additions } public boolean contains(Entity entity) { - return this.active.containsKey(entity.getId()); + return this.entities.contains(entity); // Paper - replace with better logic, do not delay removals/additions } public void forEach(Consumer action) { - if (this.iterated != null) { - throw new UnsupportedOperationException("Only one concurrent iteration supported"); - } else { - this.iterated = this.active; - - try { - for (Entity entity : this.active.values()) { - action.accept(entity); - } - } finally { - this.iterated = null; + io.papermc.paper.util.TickThread.ensureTickThread("Asynchronous entity ticklist iteration"); // Paper + // Paper start - replace with better logic, do not delay removals/additions + // To ensure nothing weird happens with dimension travelling, do not iterate over new entries... + // (by dfl iterator() is configured to not iterate over new entries) + io.papermc.paper.util.maplist.IteratorSafeOrderedReferenceSet.Iterator iterator = this.entities.iterator(); + try { + while (iterator.hasNext()) { + action.accept(iterator.next()); } + } finally { + iterator.finishedIterating(); } + // Paper end - replace with better logic, do not delay removals/additions } } diff --git a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java index 5d15c228c044a36c67014793decb314240cf6be1..dc765b92cc90f5f370254e68bbbdfa5add7935ce 100644 --- a/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java +++ b/src/main/java/net/minecraft/world/level/levelgen/NoiseBasedChunkGenerator.java @@ -87,7 +87,7 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator { return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("init_biomes", () -> { this.doCreateBiomes(blender, noiseConfig, structureAccessor, chunk); return chunk; - }), Util.backgroundExecutor()); + }), executor); // Paper - run with supplied executor } private void doCreateBiomes(Blender blender, RandomState noiseConfig, StructureManager structureAccessor, ChunkAccess chunk) { @@ -286,7 +286,7 @@ public final class NoiseBasedChunkGenerator extends ChunkGenerator { return CompletableFuture.supplyAsync(Util.wrapThreadWithTaskName("wgen_fill_noise", () -> { return this.doFill(blender, structureAccessor, noiseConfig, chunk, j, k); - }), Util.backgroundExecutor()).whenCompleteAsync((ichunkaccess1, throwable) -> { + }), executor).whenCompleteAsync((ichunkaccess1, throwable) -> { // Paper - run with supplied executor Iterator iterator = set.iterator(); while (iterator.hasNext()) { diff --git a/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java b/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java index 97a0ce3044457d22ad532e24f3330c85f73f12dc..fdf5afdba68cdeddb351ac3932057a1aa2d3167f 100644 --- a/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java +++ b/src/main/java/net/minecraft/world/level/levelgen/structure/StructureCheck.java @@ -47,8 +47,101 @@ public class StructureCheck { private final BiomeSource biomeSource; private final long seed; private final DataFixer fixerUpper; - private final Long2ObjectMap> loadedChunks = new Long2ObjectOpenHashMap<>(); - private final Map featureChecks = new HashMap<>(); + // Paper start - rewrite chunk system - synchronise this class + // additionally, make sure to purge entries from the maps so it does not leak memory + private static final int CHUNK_TOTAL_LIMIT = 50 * (2 * 100 + 1) * (2 * 100 + 1); // cache 50 structure lookups + private static final int PER_FEATURE_CHECK_LIMIT = 50 * (2 * 100 + 1) * (2 * 100 + 1); // cache 50 structure lookups + + private final SynchronisedLong2ObjectMap> loadedChunksSafe = new SynchronisedLong2ObjectMap<>(CHUNK_TOTAL_LIMIT); + private final java.util.concurrent.ConcurrentHashMap featureChecksSafe = new java.util.concurrent.ConcurrentHashMap<>(); + + private static final class SynchronisedLong2ObjectMap { + private final it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap map = new it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap<>(); + private final int limit; + + public SynchronisedLong2ObjectMap(final int limit) { + this.limit = limit; + } + + // must hold lock on map + private void purgeEntries() { + while (this.map.size() > this.limit) { + this.map.removeLast(); + } + } + + public V get(final long key) { + synchronized (this.map) { + return this.map.getAndMoveToFirst(key); + } + } + + public V put(final long key, final V value) { + synchronized (this.map) { + final V ret = this.map.putAndMoveToFirst(key, value); + this.purgeEntries(); + return ret; + } + } + + public V compute(final long key, final java.util.function.BiFunction remappingFunction) { + synchronized (this.map) { + // first, compute the value - if one is added, it will be at the last entry + this.map.compute(key, remappingFunction); + // move the entry to first, just in case it was added at last + final V ret = this.map.getAndMoveToFirst(key); + // now purge the last entries + this.purgeEntries(); + + return ret; + } + } + } + + private static final class SynchronisedLong2BooleanMap { + private final it.unimi.dsi.fastutil.longs.Long2BooleanLinkedOpenHashMap map = new it.unimi.dsi.fastutil.longs.Long2BooleanLinkedOpenHashMap(); + private final int limit; + + public SynchronisedLong2BooleanMap(final int limit) { + this.limit = limit; + } + + // must hold lock on map + private void purgeEntries() { + while (this.map.size() > this.limit) { + this.map.removeLastBoolean(); + } + } + + public boolean remove(final long key) { + synchronized (this.map) { + return this.map.remove(key); + } + } + + // note: + public boolean getOrCompute(final long key, final it.unimi.dsi.fastutil.longs.Long2BooleanFunction ifAbsent) { + synchronized (this.map) { + if (this.map.containsKey(key)) { + return this.map.getAndMoveToFirst(key); + } + } + + final boolean put = ifAbsent.get(key); + + synchronized (this.map) { + if (this.map.containsKey(key)) { + return this.map.getAndMoveToFirst(key); + } + this.map.putAndMoveToFirst(key, put); + + this.purgeEntries(); + + return put; + } + } + } + // Paper end - rewrite chunk system - synchronise this class public StructureCheck( ChunkScanAccess chunkIoWorker, @@ -76,7 +169,7 @@ public class StructureCheck { public StructureCheckResult checkStart(ChunkPos pos, Structure type, StructurePlacement placement, boolean skipReferencedStructures) { long l = pos.toLong(); - Object2IntMap object2IntMap = this.loadedChunks.get(l); + Object2IntMap object2IntMap = this.loadedChunksSafe.get(l); // Paper - rewrite chunk system - synchronise this class if (object2IntMap != null) { return this.checkStructureInfo(object2IntMap, type, skipReferencedStructures); } else { @@ -86,9 +179,9 @@ public class StructureCheck { } else if (!placement.applyAdditionalChunkRestrictions(pos.x, pos.z, this.seed)) { return StructureCheckResult.START_NOT_PRESENT; } else { - boolean bl = this.featureChecks - .computeIfAbsent(type, structure2 -> new Long2BooleanOpenHashMap()) - .computeIfAbsent(l, chunkPos -> this.canCreateStructure(pos, type)); + boolean bl = this.featureChecksSafe // Paper - rewrite chunk system - synchronise this class + .computeIfAbsent(type, structure2 -> new SynchronisedLong2BooleanMap(PER_FEATURE_CHECK_LIMIT)) // Paper - rewrite chunk system - synchronise this class + .getOrCompute(l, chunkPos -> this.canCreateStructure(pos, type)); // Paper - rewrite chunk system - synchronise this class return !bl ? StructureCheckResult.START_NOT_PRESENT : StructureCheckResult.CHUNK_LOAD_NEEDED; } } @@ -214,15 +307,26 @@ public class StructureCheck { } private void storeFullResults(long pos, Object2IntMap referencesByStructure) { - this.loadedChunks.put(pos, deduplicateEmptyMap(referencesByStructure)); - this.featureChecks.values().forEach(generationPossibilityByChunkPos -> generationPossibilityByChunkPos.remove(pos)); + // Paper start - rewrite chunk system - synchronise this class + this.loadedChunksSafe.put(pos, deduplicateEmptyMap(referencesByStructure)); + // once we insert into loadedChunks, we don't really need to be very careful about removing everything + // from this map, as everything that checks this map uses loadedChunks first + // so, one way or another it's a race condition that doesn't matter + for (SynchronisedLong2BooleanMap value : this.featureChecksSafe.values()) { + value.remove(pos); + } + // Paper end - rewrite chunk system - synchronise this class } public void incrementReference(ChunkPos pos, Structure structure) { - this.loadedChunks.compute(pos.toLong(), (posx, referencesByStructure) -> { - if (referencesByStructure == null || referencesByStructure.isEmpty()) { + this.loadedChunksSafe.compute(pos.toLong(), (posx, referencesByStructure) -> { // Paper start - rewrite chunk system - synchronise this class + // make this COW so that we do not mutate state that may be currently in use + if (referencesByStructure == null) { referencesByStructure = new Object2IntOpenHashMap<>(); + } else { + referencesByStructure = referencesByStructure instanceof Object2IntOpenHashMap fastClone ? fastClone.clone() : new Object2IntOpenHashMap<>(referencesByStructure); } + // Paper end - rewrite chunk system - synchronise this class referencesByStructure.computeInt(structure, (feature, references) -> references == null ? 1 : references + 1); return referencesByStructure; diff --git a/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java b/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java index 47c2b2da9799690291396effb9e1b06d71efc6fd..2cdd18f724296f10cd4a522d1e8196723d39cf45 100644 --- a/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java +++ b/src/main/java/net/minecraft/world/ticks/LevelChunkTicks.java @@ -26,6 +26,19 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon @Nullable private BiConsumer, ScheduledTick> onTickAdded; + // Paper start - add dirty flag + private boolean dirty; + private long lastSaved = Long.MIN_VALUE; + + public boolean isDirty(final long tick) { + return this.dirty || (!this.tickQueue.isEmpty() && tick != this.lastSaved); + } + + public void clearDirty() { + this.dirty = false; + } + // Paper end - add dirty flag + public LevelChunkTicks() { } @@ -50,6 +63,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon public ScheduledTick poll() { ScheduledTick scheduledTick = this.tickQueue.poll(); if (scheduledTick != null) { + this.dirty = true; // Paper - add dirty flag this.ticksPerPosition.remove(scheduledTick); } @@ -59,6 +73,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon @Override public void schedule(ScheduledTick orderedTick) { if (this.ticksPerPosition.add(orderedTick)) { + this.dirty = true; // Paper - add dirty flag this.scheduleUnchecked(orderedTick); } } @@ -81,7 +96,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon while (iterator.hasNext()) { ScheduledTick scheduledTick = iterator.next(); if (predicate.test(scheduledTick)) { - iterator.remove(); + iterator.remove(); this.dirty = true; // Paper - add dirty flag this.ticksPerPosition.remove(scheduledTick); } } @@ -98,6 +113,7 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon @Override public ListTag save(long l, Function function) { + this.lastSaved = l; // Paper - add dirty system to level ticks ListTag listTag = new ListTag(); if (this.pendingTicks != null) { for (SavedTick savedTick : this.pendingTicks) { @@ -114,6 +130,11 @@ public class LevelChunkTicks implements SerializableTickContainer, TickCon public void unpack(long time) { if (this.pendingTicks != null) { + // Paper start - add dirty system to level chunk ticks + if (this.tickQueue.isEmpty()) { + this.lastSaved = time; + } + // Paper end - add dirty system to level chunk ticks int i = -this.pendingTicks.size(); for (SavedTick savedTick : this.pendingTicks) { diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java index 7dae8d91b74cc7df0745f0c121e3bea09b8d0b6d..1e2530c9e5212b6d2bdbc94817beddb4247dac73 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java @@ -115,7 +115,7 @@ public class CraftChunk implements Chunk { @Override public boolean isEntitiesLoaded() { - return this.getCraftWorld().getHandle().entityManager.areEntitiesLoaded(ChunkPos.asLong(this.x, this.z)); + return this.getCraftWorld().getHandle().areEntitiesLoaded(io.papermc.paper.util.CoordinateUtils.getChunkKey(this.x, this.z)); // Paper - rewrite chunk system } @Override @@ -124,51 +124,7 @@ public class CraftChunk implements Chunk { this.getWorld().getChunkAt(this.x, this.z); // Transient load for this tick } - PersistentEntitySectionManager entityManager = this.getCraftWorld().getHandle().entityManager; - long pair = ChunkPos.asLong(this.x, this.z); - - if (entityManager.areEntitiesLoaded(pair)) { - return entityManager.getEntities(new ChunkPos(this.x, this.z)).stream() - .map(net.minecraft.world.entity.Entity::getBukkitEntity) - .filter(Objects::nonNull).toArray(Entity[]::new); - } - - entityManager.ensureChunkQueuedForLoad(pair); // Start entity loading - - // SPIGOT-6772: Use entity mailbox and re-schedule entities if they get unloaded - ProcessorMailbox mailbox = ((EntityStorage) entityManager.permanentStorage).entityDeserializerQueue; - BooleanSupplier supplier = () -> { - // only execute inbox if our entities are not present - if (entityManager.areEntitiesLoaded(pair)) { - return true; - } - - if (!entityManager.isPending(pair)) { - // Our entities got unloaded, this should normally not happen. - entityManager.ensureChunkQueuedForLoad(pair); // Re-start entity loading - } - - // tick loading inbox, which loads the created entities to the world - // (if present) - entityManager.tick(); - // check if our entities are loaded - return entityManager.areEntitiesLoaded(pair); - }; - - // now we wait until the entities are loaded, - // the converting from NBT to entity object is done on the main Thread which is why we wait - while (!supplier.getAsBoolean()) { - if (mailbox.size() != 0) { - mailbox.run(); - } else { - Thread.yield(); - LockSupport.parkNanos("waiting for entity loading", 100000L); - } - } - - return entityManager.getEntities(new ChunkPos(this.x, this.z)).stream() - .map(net.minecraft.world.entity.Entity::getBukkitEntity) - .filter(Objects::nonNull).toArray(Entity[]::new); + return this.getCraftWorld().getHandle().getChunkEntities(this.x, this.z); // Paper - rewrite chunk system } @Override diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java index 5467a5985eaf159e2a4f19dd5723d05d8f2d598e..66fa93a44a348f9cd300ec0c4a2d09a7a2bf47e1 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java @@ -1407,7 +1407,6 @@ public final class CraftServer implements Server { // Paper - Put world into worldlist before initing the world; move up this.getServer().prepareLevels(internal.getChunkSource().chunkMap.progressListener, internal); - internal.entityManager.tick(); // SPIGOT-6526: Load pending entities so they are available to the API this.pluginManager.callEvent(new WorldLoadEvent(internal.getWorld())); return internal.getWorld(); @@ -1452,7 +1451,7 @@ public final class CraftServer implements Server { } handle.getChunkSource().close(save); - handle.entityManager.close(save); // SPIGOT-6722: close entityManager + // handle.entityManager.close(save); // SPIGOT-6722: close entityManager // Paper - rewrite chunk system handle.convertable.close(); } catch (Exception ex) { this.getLogger().log(Level.SEVERE, null, ex); @@ -2488,7 +2487,7 @@ public final class CraftServer implements Server { @Override public boolean isPrimaryThread() { - return Thread.currentThread().equals(this.console.serverThread) || this.console.hasStopped() || !org.spigotmc.AsyncCatcher.enabled; // All bets are off if we have shut down (e.g. due to watchdog) + return io.papermc.paper.util.TickThread.isTickThread(); // Paper - rewrite chunk system } // Paper start - Adventure diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java index 4b6a04e47f5d4c071607516519098fab317dcf12..01fc74e6cc8ea8808b821583afb26309587dc003 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java @@ -518,10 +518,14 @@ public class CraftWorld extends CraftRegionAccessor implements World { ChunkHolder playerChunk = this.world.getChunkSource().chunkMap.getVisibleChunkIfPresent(ChunkPos.asLong(x, z)); if (playerChunk == null) return false; - playerChunk.getTickingChunkFuture().thenAccept(either -> { - either.ifSuccess(chunk -> { + // Paper start - rewrite player chunk loader + net.minecraft.world.level.chunk.LevelChunk chunk = playerChunk.getSendingChunk(); + if (chunk == null) { + return false; + } + // Paper end - rewrite player chunk loader List playersInRange = playerChunk.playerProvider.getPlayers(playerChunk.getPos(), false); - if (playersInRange.isEmpty()) return; + if (playersInRange.isEmpty()) return true; // Paper - rewrite player chunk loader ClientboundLevelChunkWithLightPacket refreshPacket = new ClientboundLevelChunkWithLightPacket(chunk, this.world.getLightEngine(), null, null); for (ServerPlayer player : playersInRange) { @@ -529,8 +533,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { player.connection.send(refreshPacket); } - }); - }); + // Paper - rewrite player chunk loader return true; } @@ -609,20 +612,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { @Override public Collection getPluginChunkTickets(int x, int z) { DistanceManager chunkDistanceManager = this.world.getChunkSource().chunkMap.distanceManager; - SortedArraySet> tickets = chunkDistanceManager.tickets.get(ChunkPos.asLong(x, z)); - - if (tickets == null) { - return Collections.emptyList(); - } - - ImmutableList.Builder ret = ImmutableList.builder(); - for (Ticket ticket : tickets) { - if (ticket.getType() == TicketType.PLUGIN_TICKET) { - ret.add((Plugin) ticket.key); - } - } - - return ret.build(); + return chunkDistanceManager.getChunkHolderManager().getPluginChunkTickets(x, z); // Paper - rewrite chunk system } @Override @@ -630,7 +620,7 @@ public class CraftWorld extends CraftRegionAccessor implements World { Map> ret = new HashMap<>(); DistanceManager chunkDistanceManager = this.world.getChunkSource().chunkMap.distanceManager; - for (Long2ObjectMap.Entry>> chunkTickets : chunkDistanceManager.tickets.long2ObjectEntrySet()) { + for (Long2ObjectMap.Entry>> chunkTickets : chunkDistanceManager.getChunkHolderManager().getTicketsCopy().long2ObjectEntrySet()) { // Paper - rewrite chunk system long chunkKey = chunkTickets.getLongKey(); SortedArraySet> tickets = chunkTickets.getValue(); @@ -1327,12 +1317,12 @@ public class CraftWorld extends CraftRegionAccessor implements World { @Override public int getViewDistance() { - return this.world.getChunkSource().chunkMap.serverViewDistance; + return this.getHandle().playerChunkLoader.getAPIViewDistance(); // Paper - replace player chunk loader } @Override public int getSimulationDistance() { - return this.world.getChunkSource().chunkMap.getDistanceManager().simulationDistance; + return this.getHandle().playerChunkLoader.getAPITickDistance(); // Paper - replace player chunk loader } public BlockMetadataStore getBlockMetadata() { @@ -2495,17 +2485,20 @@ public class CraftWorld extends CraftRegionAccessor implements World { @Override public void setSimulationDistance(final int simulationDistance) { - throw new UnsupportedOperationException("Not implemented yet"); + if (simulationDistance < 2 || simulationDistance > 32) { + throw new IllegalArgumentException("Simulation distance " + simulationDistance + " is out of range of [2, 32]"); + } + this.getHandle().chunkSource.chunkMap.setTickViewDistance(simulationDistance); } @Override public int getSendViewDistance() { - return this.getViewDistance(); + return this.getHandle().playerChunkLoader.getAPISendViewDistance(); // Paper - replace player chunk loader } @Override public void setSendViewDistance(final int viewDistance) { - throw new UnsupportedOperationException("Not implemented yet"); + this.getHandle().chunkSource.chunkMap.setSendViewDistance(viewDistance); // Paper - replace player chunk loader } // Paper start - implement pointers diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java index 41d6f164251d1de4663383a024e9edd5257f97f3..2d232a5e978baaedab4665ac389187f8d81c5484 100644 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java @@ -3458,31 +3458,31 @@ public class CraftPlayer extends CraftHumanEntity implements Player { @Override public int getViewDistance() { - return io.papermc.paper.chunk.system.ChunkSystem.getLoadViewDistance(this.getHandle()); + return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPIViewDistance(this); } @Override public void setViewDistance(final int viewDistance) { - throw new UnsupportedOperationException("Not implemented yet"); + this.getHandle().setLoadViewDistance(viewDistance < 0 ? viewDistance : viewDistance + 1); } @Override public int getSimulationDistance() { - return io.papermc.paper.chunk.system.ChunkSystem.getTickViewDistance(this.getHandle()); + return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPITickViewDistance(this); } @Override public void setSimulationDistance(final int simulationDistance) { - throw new UnsupportedOperationException("Not implemented yet"); + this.getHandle().setTickViewDistance(simulationDistance); } @Override public int getSendViewDistance() { - return io.papermc.paper.chunk.system.ChunkSystem.getSendViewDistance(this.getHandle()); + return io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.getAPISendViewDistance(this); } @Override public void setSendViewDistance(final int viewDistance) { - throw new UnsupportedOperationException("Not implemented yet"); + this.getHandle().setSendViewDistance(viewDistance); } } diff --git a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java index b65710b648e31ab74204b5abd9397d9e6e26dac4..c77f722131e0e40e9de29bf8d42f9bc5d8fa2f7d 100644 --- a/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java +++ b/src/main/java/org/bukkit/craftbukkit/generator/CustomChunkGenerator.java @@ -264,7 +264,7 @@ public class CustomChunkGenerator extends InternalChunkGenerator { return ichunkaccess1; }; - return future == null ? CompletableFuture.supplyAsync(() -> function.apply(chunk), net.minecraft.Util.backgroundExecutor()) : future.thenApply(function); + return future == null ? CompletableFuture.supplyAsync(() -> function.apply(chunk), executor) : future.thenApply(function); // Paper - run with supplied executor } @Override diff --git a/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java b/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java index cd7f1309cf01a5f01a28aded03a36fe15adb1756..41a291d42667c38d3e5bbe47236772761e85929b 100644 --- a/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java +++ b/src/main/java/org/bukkit/craftbukkit/util/DelegatedGeneratorAccess.java @@ -815,19 +815,39 @@ public abstract class DelegatedGeneratorAccess implements WorldGenLevel { @Nullable @Override public BlockState getBlockStateIfLoaded(final BlockPos blockposition) { - return null; + return this.handle.getBlockStateIfLoaded(blockposition); } @Nullable @Override public FluidState getFluidIfLoaded(final BlockPos blockposition) { - return null; + return this.handle.getFluidIfLoaded(blockposition); } @Nullable @Override public ChunkAccess getChunkIfLoadedImmediately(final int x, final int z) { - return null; + return this.handle.getChunkIfLoadedImmediately(x, z); + } + + @Override + public void getHardCollidingEntities(final Entity except, final AABB box, final Predicate predicate, final List into) { + this.handle.getHardCollidingEntities(except, box, predicate, into); + } + + @Override + public List getHardCollidingEntities(final Entity except, final AABB box, final Predicate predicate) { + return this.handle.getHardCollidingEntities(except, box, predicate); + } + + @Override + public void getEntities(final Entity except, final AABB box, final Predicate predicate, final List into) { + this.handle.getEntities(except, box, predicate, into); + } + + @Override + public void getEntitiesByClass(final Class clazz, final Entity except, final AABB box, final List into, final Predicate predicate) { + this.handle.getEntitiesByClass(clazz, except, box, into, predicate); } // Paper end } diff --git a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java index e8a73d34dbb372581b03018aade170a31c266099..210f454a840aa5564f7cbf33b83d31aa74814c84 100644 --- a/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java +++ b/src/main/java/org/bukkit/craftbukkit/util/DummyGeneratorAccess.java @@ -268,4 +268,19 @@ public class DummyGeneratorAccess implements WorldGenLevel { @Override public void scheduleTick(BlockPos pos, Fluid fluid, int delay, net.minecraft.world.ticks.TickPriority priority) {} // Paper end - add more methods + // Paper start + @Override + public List getHardCollidingEntities(Entity except, AABB box, Predicate predicate) { + return java.util.Collections.emptyList(); + } + + @Override + public void getEntities(Entity except, AABB box, Predicate predicate, List into) {} + + @Override + public void getHardCollidingEntities(Entity except, AABB box, Predicate predicate, List into) {} + + @Override + public void getEntitiesByClass(Class clazz, Entity except, AABB box, List into, Predicate predicate) {} + // Paper end } diff --git a/src/main/java/org/spigotmc/AsyncCatcher.java b/src/main/java/org/spigotmc/AsyncCatcher.java index e8e3cc48cf1c58bd8151d1f28df28781859cd0e3..2e074c16dab1ead47914070329da0398c3274048 100644 --- a/src/main/java/org/spigotmc/AsyncCatcher.java +++ b/src/main/java/org/spigotmc/AsyncCatcher.java @@ -9,7 +9,7 @@ public class AsyncCatcher public static void catchOp(String reason) { - if ( (AsyncCatcher.enabled || io.papermc.paper.util.TickThread.STRICT_THREAD_CHECKS) && Thread.currentThread() != MinecraftServer.getServer().serverThread ) // Paper + if (!(io.papermc.paper.util.TickThread.isTickThread())) // Paper { MinecraftServer.LOGGER.error("Thread " + Thread.currentThread().getName() + " failed main thread check: " + reason, new Throwable()); // Paper throw new IllegalStateException( "Asynchronous " + reason + "!" ); diff --git a/src/main/java/org/spigotmc/WatchdogThread.java b/src/main/java/org/spigotmc/WatchdogThread.java index ad282d34919716b75acd10426cd071da9d064a51..9e5d08f57aa448552d100ca892c211d44441ef68 100644 --- a/src/main/java/org/spigotmc/WatchdogThread.java +++ b/src/main/java/org/spigotmc/WatchdogThread.java @@ -8,7 +8,7 @@ import java.util.logging.Logger; import net.minecraft.server.MinecraftServer; import org.bukkit.Bukkit; -public class WatchdogThread extends Thread +public final class WatchdogThread extends io.papermc.paper.util.TickThread // Paper - rewrite chunk system { private static WatchdogThread instance; @@ -115,6 +115,7 @@ public class WatchdogThread extends Thread // Paper end - Different message for short timeout log.log( Level.SEVERE, "------------------------------" ); log.log( Level.SEVERE, "Server thread dump (Look for plugins here before reporting to Paper!):" ); // Paper + io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.dumpAllChunkLoadInfo(isLongTimeout); // Paper - rewrite chunk system WatchdogThread.dumpThread( ManagementFactory.getThreadMXBean().getThreadInfo( MinecraftServer.getServer().serverThread.getId(), Integer.MAX_VALUE ), log ); log.log( Level.SEVERE, "------------------------------" ); //