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Improve Light Optimizations more

Browse source 
Hopefully fixes #4030 and hopefully fixes #4025

Use the concurrent enqueue process for all light tasks.
Restore dedicated light thread, helpful for profiling and identifying light work
as well as lets us give it a boosted thread priority
This commit is contained in:
Aikar 2020-07-30 22:01:32 -04:00
parent 9b4ddafa60
commit c6fe95327f
1 changed files with 54 additions and 31 deletions
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85
Spigot-Server-Patches/Optimize-Light-Engine.patch
View file

@ -1056,17 +1056,19 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ ChunkLightQueue(long chunk) {}
+ }
+
+ static class PendingChunkLight {
+ static class PendingLightTask {
+ long chunkId;
+ int priority;
+ IntSupplier priority;
+ Runnable pre;
+ Runnable post;
+ boolean fastUpdate;
+
+ public PendingChunkLight(long chunkId, int priority, Runnable pre, Runnable post) {
+ public PendingLightTask(long chunkId, IntSupplier priority, Runnable pre, Runnable post, boolean fastUpdate) {
+ this.chunkId = chunkId;
+ this.priority = priority;
+ this.pre = pre;
+ this.post = post;
+ this.fastUpdate = fastUpdate;
+ }
+ }
+
@ -1076,7 +1078,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ private int size = 0;
+ private int lowestPriority = MAX_PRIORITIES;
+ private final it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap<ChunkLightQueue>[] buckets = new it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap[MAX_PRIORITIES];
+ private final java.util.concurrent.ConcurrentLinkedQueue<PendingChunkLight> pendingChunks = new java.util.concurrent.ConcurrentLinkedQueue<>();
+ private final java.util.concurrent.ConcurrentLinkedQueue<PendingLightTask> pendingTasks = new java.util.concurrent.ConcurrentLinkedQueue<>();
+ private final java.util.concurrent.ConcurrentLinkedQueue<Runnable> priorityChanges = new java.util.concurrent.ConcurrentLinkedQueue<>();
+
+ private LightQueue() {
@ -1095,7 +1097,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ remove.post.addAll(existing.post);
+ }
+ }
+ if (this.buckets[priority].containsKey(pair)) {
+ if (!this.buckets[priority].isEmpty()) {
+ if (lowestPriority > priority) {
+ lowestPriority = priority;
+ }
@ -1103,23 +1105,27 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ });
+ }
+
+ public final void addChunk(long chunkId, int priority, Runnable pre, Runnable post) {
+ pendingChunks.add(new PendingChunkLight(chunkId, priority, pre, post));
+ public final void addChunk(long chunkId, IntSupplier priority, Runnable pre, Runnable post) {
+ pendingTasks.add(new PendingLightTask(chunkId, priority, pre, post, true));
+ queueUpdate();
+ }
+
+ public final void add(long chunkId, int priority, LightEngineThreaded.Update type, Runnable run) {
+ add(chunkId, priority, type, run, false);
+ public final void add(long chunkId, IntSupplier priority, LightEngineThreaded.Update type, Runnable run) {
+ pendingTasks.add(new PendingLightTask(chunkId, priority, type == Update.PRE_UPDATE ? run : null, type == Update.POST_UPDATE ? run : null, false));
+ }
+ public final void add(long chunkId, int priority, LightEngineThreaded.Update type, Runnable run, boolean shouldFastUpdate) {
+ ChunkLightQueue lightQueue = this.buckets[priority].computeIfAbsent(chunkId, ChunkLightQueue::new);
+ this.size++;
+ if (type == Update.PRE_UPDATE) {
+ lightQueue.pre.add(run);
+ } else {
+ lightQueue.post.add(run);
+ public final void add(PendingLightTask update) {
+ int priority = update.priority.getAsInt();
+ ChunkLightQueue lightQueue = this.buckets[priority].computeIfAbsent(update.chunkId, ChunkLightQueue::new);
+
+ if (update.pre != null) {
+ this.size++;
+ lightQueue.pre.add(update.pre);
+ }
+ if (shouldFastUpdate) {
+ if (update.post != null) {
+ this.size++;
+ lightQueue.post.add(update.post);
+ }
+ if (update.fastUpdate) {
+ lightQueue.shouldFastUpdate = true;
+ }
+
@ -1129,7 +1135,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ }
+
+ public final boolean isEmpty() {
+ return this.size == 0 && this.pendingChunks.isEmpty();
+ return this.size == 0 && this.pendingTasks.isEmpty();
+ }
+
+ public final int size() {
@ -1137,10 +1143,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ }
+
+ public boolean poll(java.util.List<Runnable> pre, java.util.List<Runnable> post) {
+ PendingChunkLight chunk;
+ while ((chunk = pendingChunks.poll()) != null) {
+ add(chunk.chunkId, chunk.priority, Update.PRE_UPDATE, chunk.pre, true);
+ add(chunk.chunkId, chunk.priority, Update.POST_UPDATE, chunk.post, true);
+ PendingLightTask pending;
+ while ((pending = pendingTasks.poll()) != null) {
+ add(pending);
+ }
+ Runnable run;
+ while ((run = priorityChanges.poll()) != null) {
@ -1188,20 +1193,22 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
this.b = threadedmailbox;
}
@@ -0,0 +0,0 @@ public class LightEngineThreaded extends LightEngine implements AutoCloseable {
}
private void a(int i, int j, IntSupplier intsupplier, LightEngineThreaded.Update lightenginethreaded_update, Runnable runnable) {
this.e.a(ChunkTaskQueueSorter.a(() -> {
- this.e.a(ChunkTaskQueueSorter.a(() -> {
- this.c.add(Pair.of(lightenginethreaded_update, runnable));
- if (this.c.size() >= this.f) {
- this.b();
- }
+ // Paper start
+ int priority = intsupplier.getAsInt();
+ this.queue.add(ChunkCoordIntPair.pair(i, j), priority, lightenginethreaded_update, runnable);
+ // Paper end
}, ChunkCoordIntPair.pair(i, j), intsupplier));
-
- }, ChunkCoordIntPair.pair(i, j), intsupplier));
+ // Paper start - replace method
+ this.queue.add(ChunkCoordIntPair.pair(i, j), intsupplier, lightenginethreaded_update, runnable);
+ // Paper end
}
@Override
@@ -0,0 +0,0 @@ public class LightEngineThreaded extends LightEngine implements AutoCloseable {
public CompletableFuture<IChunkAccess> a(IChunkAccess ichunkaccess, boolean flag) {
ChunkCoordIntPair chunkcoordintpair = ichunkaccess.getPos();
@ -1214,8 +1221,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+ CompletableFuture<IChunkAccess> future = new CompletableFuture<>();
+ IntSupplier prioritySupplier = playerChunkMap.getPrioritySupplier(pair);
+ boolean[] skippedPre = {false};
+ int priority = prioritySupplier.getAsInt();
+ this.queue.addChunk(pair, priority, SystemUtils.a(() -> {
+ this.queue.addChunk(pair, prioritySupplier, SystemUtils.a(() -> {
+ if (!isChunkLightStatus(pair)) {
+ this.d.c(chunkcoordintpair); // copied from end of method to release light ticket
+ future.complete(ichunkaccess);
@ -1339,6 +1345,23 @@ diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/j
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
@@ -0,0 +0,0 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
Mailbox<Runnable> mailbox = Mailbox.a("main", iasynctaskhandler::a);
this.worldLoadListener = worldloadlistener;
- ThreadedMailbox<Runnable> lightthreaded; ThreadedMailbox<Runnable> threadedmailbox1 = lightthreaded = ThreadedMailbox.a(executor, "light"); // Paper
+ // Paper start - use light thread
+ ThreadedMailbox<Runnable> lightthreaded; ThreadedMailbox<Runnable> threadedmailbox1 = lightthreaded = ThreadedMailbox.a(java.util.concurrent.Executors.newSingleThreadExecutor(r -> {
+ Thread thread = new Thread(r);
+ thread.setName(((WorldDataServer)world.getWorldData()).getName() + " - Light");
+ thread.setDaemon(true);
+ thread.setPriority(Thread.NORM_PRIORITY+1);
+ return thread;
+ }), "light");
+ // Paper end
this.p = new ChunkTaskQueueSorter(ImmutableList.of(threadedmailbox, mailbox, threadedmailbox1), executor, Integer.MAX_VALUE);
this.mailboxWorldGen = this.p.a(threadedmailbox, false);
@@ -0,0 +0,0 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
// Paper end
}