From ad4b9433cd1e5053f6fb2519c6099fa60b44f76d Mon Sep 17 00:00:00 2001 From: Aikar Date: Mon, 1 Jan 2018 16:10:24 -0500 Subject: [PATCH] Configurable Max Chunk Gens per Tick Limit the number of generations that can occur in a single tick, forcing them to be spread out more. Defaulting to 10 as an average generation is going to be 3-6ms, which means 10 will likely cause the server to lose TPS, but constrain how much. This should result in no noticeable speed reduction in generation for servers not lagging, and let larger servers reduce this value according to their own desires. diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java index 8949b0290..cd036b440 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -465,4 +465,16 @@ public class PaperWorldConfig { } log("Max Chunk Sends Per Tick: " + maxChunkSendsPerTick); } + + public int maxChunkGensPerTick = 10; + private void maxChunkGensPerTick() { + maxChunkGensPerTick = getInt("max-chunk-gens-per-tick", maxChunkGensPerTick); + if (maxChunkGensPerTick <= 0) { + maxChunkGensPerTick = Integer.MAX_VALUE; + log("Max Chunk Gens Per Tick: Unlimited (NOT RECOMMENDED)"); + } else { + log("Max Chunk Gens Per Tick: " + maxChunkGensPerTick); + } + } + } diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java index 045adbd3d..20e734bc8 100644 --- a/src/main/java/net/minecraft/server/PlayerChunk.java +++ b/src/main/java/net/minecraft/server/PlayerChunk.java @@ -27,6 +27,7 @@ public class PlayerChunk { private boolean done; // CraftBukkit start - add fields + boolean chunkExists; // Paper private boolean loadInProgress = false; private Runnable loadedRunnable = new Runnable() { public void run() { @@ -50,6 +51,7 @@ public class PlayerChunk { // CraftBukkit start loadInProgress = true; this.chunk = playerchunkmap.getWorld().getChunkProviderServer().getChunkAt(i, j, loadedRunnable, false); + this.chunkExists = this.chunk != null || ChunkIOExecutor.hasQueuedChunkLoad(playerChunkMap.getWorld(), i, j); // Paper markChunkUsed(); // Paper - delay chunk unloads // CraftBukkit end } diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java index 6ee9f6cfb..99652ae3e 100644 --- a/src/main/java/net/minecraft/server/PlayerChunkMap.java +++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java @@ -166,6 +166,7 @@ public class PlayerChunkMap { // Spigot start org.spigotmc.SlackActivityAccountant activityAccountant = this.world.getMinecraftServer().slackActivityAccountant; activityAccountant.startActivity(0.5); + int chunkGensAllowed = world.paperConfig.maxChunkGensPerTick; // Paper // Spigot end Iterator iterator1 = this.h.iterator(); @@ -175,6 +176,11 @@ public class PlayerChunkMap { if (playerchunk1.f() == null) { boolean flag = playerchunk1.a(PlayerChunkMap.b); + // Paper start + if (flag && !playerchunk1.chunkExists && chunkGensAllowed-- <= 0) { + continue; + } + // Paper end if (playerchunk1.a(flag)) { iterator1.remove(); diff --git a/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOExecutor.java b/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOExecutor.java index 9aaca21a7..f50d55c8e 100644 --- a/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOExecutor.java +++ b/src/main/java/org/bukkit/craftbukkit/chunkio/ChunkIOExecutor.java @@ -35,4 +35,10 @@ public class ChunkIOExecutor { public static void tick() { instance.finishActive(); } + + // Paper start + public static boolean hasQueuedChunkLoad(World world, int x, int z) { + return instance.hasTask(new QueuedChunk(x, z, null, world, null)); + } + // Paper end } diff --git a/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java b/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java index 193c3621c..cf1258c55 100644 --- a/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java +++ b/src/main/java/org/bukkit/craftbukkit/util/AsynchronousExecutor.java @@ -351,4 +351,10 @@ public final class AsynchronousExecutor { public void setActiveThreads(final int coreSize) { pool.setCorePoolSize(coreSize); } + + // Paper start + public boolean hasTask(P parameter) throws IllegalStateException { + return tasks.get(parameter) != null; + } + // Paper end } -- 2.16.2