From 92cab28ad64ca7a9e872c15de45aaa49778ee048 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 128ec7260a..91ae634edd 100644 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java @@ -386,4 +386,15 @@ 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 3f4a8f21c0..f8d8a44a88 100644 --- a/src/main/java/net/minecraft/server/PlayerChunk.java +++ b/src/main/java/net/minecraft/server/PlayerChunk.java @@ -28,6 +28,7 @@ public class PlayerChunk { // CraftBukkit start - add fields // You know the drill, https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/browse // All may seem good at first, but there's deeper issues if you play for a bit + boolean chunkExists; // Paper private boolean loadInProgress = false; private Runnable loadedRunnable = new Runnable() { public void run() { @@ -52,6 +53,7 @@ public class PlayerChunk { chunkproviderserver.a(i, j); this.chunk = chunkproviderserver.getChunkAt(i, j, true, false); + this.chunkExists = this.chunk != null || ChunkIOExecutor.hasQueuedChunkLoad(playerChunkMap.getWorld(), i, j); // Paper markChunkUsed(); // Paper - delay chunk unloads } diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java index 54f31349e9..d1a443ca8d 100644 --- a/src/main/java/net/minecraft/server/PlayerChunkMap.java +++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java @@ -140,6 +140,7 @@ 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(); @@ -149,6 +150,11 @@ 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 9aaca21a79..f50d55c8ee 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 193c3621c6..cf1258c559 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 } -- 2.19.0