PaperMC/Spigot-Server-Patches/0145-Chunk-Save-Stats-Debug-Option.patch
Aikar 2d7e5dce25
Disable Vanilla last chunk access cache, use ours
Also fixes some bugs in ours

Ultimately they both are near the same, but ours is behind the synchronized gate.

Mojangs is mixed behind 2 different synchronization contexts (chunks can lock 2 different objects)

Mojang also blindly unsets the ref on any chunk unload, not just if its the one being pointed to.
2018-08-27 00:26:00 -04:00

93 lines
4.7 KiB
Diff

From 2ec23d4415fa7cdff14d42f5f46c1b11eea99c63 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Fri, 4 Nov 2016 02:12:10 -0400
Subject: [PATCH] Chunk Save Stats Debug Option
Adds a command line flag to enable stats on how chunk saves are processing.
Stats on current queue, how many was processed and how many were queued.
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 87744dcbfc..355186c111 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -30,6 +30,11 @@ public class ChunkProviderServer implements IChunkProvider {
public final LongSet unloadQueue = new LongOpenHashSet();
public final ChunkGenerator<?> chunkGenerator;
private final IChunkLoader chunkLoader;
+ // Paper start - chunk save stats
+ private long lastQueuedSaves = 0L; // Paper
+ private long lastProcessedSaves = 0L; // Paper
+ private long lastSaveStatPrinted = System.currentTimeMillis();
+ // Paper end
public final Long2ObjectMap<Chunk> chunks = Long2ObjectMaps.synchronize(new ChunkMap(8192));
private Chunk lastChunk;
private final ChunkTaskScheduler chunkScheduler;
@@ -237,6 +242,29 @@ public class ChunkProviderServer implements IChunkProvider {
// Paper start
final ChunkRegionLoader chunkLoader = (ChunkRegionLoader) world.getChunkProviderServer().chunkLoader;
final int queueSize = chunkLoader.getQueueSize();
+
+ final long now = System.currentTimeMillis();
+ final long timeSince = (now - lastSaveStatPrinted) / 1000;
+ final Integer printRateSecs = Integer.getInteger("printSaveStats");
+ if (printRateSecs != null && timeSince >= printRateSecs) {
+ final String timeStr = "/" + timeSince +"s";
+ final long queuedSaves = chunkLoader.getQueuedSaves();
+ long queuedDiff = queuedSaves - lastQueuedSaves;
+ lastQueuedSaves = queuedSaves;
+
+ final long processedSaves = chunkLoader.getProcessedSaves();
+ long processedDiff = processedSaves - lastProcessedSaves;
+ lastProcessedSaves = processedSaves;
+
+ lastSaveStatPrinted = now;
+ if (processedDiff > 0 || queueSize > 0 || queuedDiff > 0) {
+ System.out.println("[Chunk Save Stats] " + world.worldData.getName() +
+ " - Current: " + queueSize +
+ " - Queued: " + queuedDiff + timeStr +
+ " - Processed: " +processedDiff + timeStr
+ );
+ }
+ }
if (queueSize > world.paperConfig.queueSizeAutoSaveThreshold){
return false;
}
diff --git a/src/main/java/net/minecraft/server/ChunkRegionLoader.java b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
index 3283b5047d..110c9ef520 100644
--- a/src/main/java/net/minecraft/server/ChunkRegionLoader.java
+++ b/src/main/java/net/minecraft/server/ChunkRegionLoader.java
@@ -141,7 +141,13 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
}
- public int getQueueSize() { return queue.size(); } // Paper
+ // Paper start
+ private long queuedSaves = 0;
+ private final java.util.concurrent.atomic.AtomicLong processedSaves = new java.util.concurrent.atomic.AtomicLong(0L);
+ public int getQueueSize() { return queue.size(); }
+ public long getQueuedSaves() { return queuedSaves; }
+ public long getProcessedSaves() { return processedSaves.longValue(); }
+ // Paper end
// CraftBukkit start - Add async variant, provide compatibility
@Nullable
@@ -331,6 +337,7 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
}
protected void a(ChunkCoordIntPair chunkcoordintpair, Supplier<NBTTagCompound> nbttagcompound) { // Spigot
+ queuedSaves++; // Paper
synchronized (this.queue) { // Paper - synchronize while modifying the map
queue.add(new QueuedChunk(chunkcoordintpair, nbttagcompound)); // Paper - Chunk queue improvements
this.b.put(chunkcoordintpair, nbttagcompound);
@@ -356,6 +363,7 @@ public class ChunkRegionLoader implements IChunkLoader, IAsyncChunkSaver {
} else {
ChunkCoordIntPair chunkcoordintpair = chunk.coords; // Paper - Chunk queue improvements
Supplier<NBTTagCompound> nbttagcompound = chunk.compoundSupplier; // Spigot // Paper
+ processedSaves.incrementAndGet(); // Paper
if (nbttagcompound == null) {
return true;
--
2.18.0