mirror of
https://github.com/PaperMC/Paper.git
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2d7e5dce25
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.
185 lines
8.7 KiB
Diff
185 lines
8.7 KiB
Diff
From 633810714b9d75cdaabfc1a4d2e687046ecb2bc5 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 18 Jun 2016 23:22:12 -0400
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Subject: [PATCH] Delay Chunk Unloads based on Player Movement
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When players are moving in the world, doing things such as building or exploring,
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they will commonly go back and forth in a small area. This causes a ton of chunk load
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and unload activity on the edge chunks of their view distance.
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A simple back and forth movement in 6 blocks could spam a chunk to thrash a
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loading and unload cycle over and over again.
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This is very wasteful. This system introduces a delay of inactivity on a chunk
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before it actually unloads, which is maintained separately from ChunkGC.
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This allows servers with smaller worlds who do less long distance exploring to stop
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wasting cpu cycles on saving/unloading/reloading chunks repeatedly.
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diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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index f8102d9f07..547ab09627 100644
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--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
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@@ -288,4 +288,18 @@ public class PaperWorldConfig {
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preventTntFromMovingInWater = getBoolean("prevent-tnt-from-moving-in-water", false);
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log("Prevent TNT from moving in water: " + preventTntFromMovingInWater);
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}
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+
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+ public long delayChunkUnloadsBy;
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+ private void delayChunkUnloadsBy() {
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+ delayChunkUnloadsBy = PaperConfig.getSeconds(getString("delay-chunk-unloads-by", "10s"));
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+ if (delayChunkUnloadsBy > 0) {
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+ log("Delaying chunk unloads by " + delayChunkUnloadsBy + " seconds");
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+ delayChunkUnloadsBy *= 1000;
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+ }
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+ }
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+
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+ public boolean skipEntityTickingInChunksScheduledForUnload = true;
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+ private void skipEntityTickingInChunksScheduledForUnload() {
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+ skipEntityTickingInChunksScheduledForUnload = getBoolean("skip-entity-ticking-in-chunks-scheduled-for-unload", skipEntityTickingInChunksScheduledForUnload);
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+ }
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}
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diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
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index 0ef1a8c7d3..2efb870dd6 100644
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--- a/src/main/java/net/minecraft/server/Chunk.java
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+++ b/src/main/java/net/minecraft/server/Chunk.java
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@@ -37,6 +37,7 @@ public class Chunk implements IChunkAccess {
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private boolean i;public boolean isLoaded() { return i; } // Paper - OBFHELPER
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public final World world;
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public final Map<HeightMap.Type, HeightMap> heightMap;
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+ public Long scheduledForUnload; // Paper - delay chunk unloads
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public final int locX;
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public final int locZ;
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private boolean l;
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diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
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index 1a1daf36b7..7417660e4d 100644
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--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
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+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
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@@ -306,6 +306,19 @@ public class ChunkProviderServer implements IChunkProvider {
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}
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activityAccountant.endActivity(); // Spigot
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}
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+ // Paper start - delayed chunk unloads
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+ long now = System.currentTimeMillis();
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+ long unloadAfter = world.paperConfig.delayChunkUnloadsBy;
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+ if (unloadAfter > 0) {
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+ //noinspection Convert2streamapi
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+ for (Chunk chunk : chunks.values()) {
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+ if (chunk.scheduledForUnload != null && now - chunk.scheduledForUnload > unloadAfter) {
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+ chunk.scheduledForUnload = null;
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+ unload(chunk);
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+ }
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+ }
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+ }
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+ // Paper end
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this.chunkScheduler.a(booleansupplier);
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}
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diff --git a/src/main/java/net/minecraft/server/PlayerChunk.java b/src/main/java/net/minecraft/server/PlayerChunk.java
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index ac0e90eeca..3f4a8f21c0 100644
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--- a/src/main/java/net/minecraft/server/PlayerChunk.java
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+++ b/src/main/java/net/minecraft/server/PlayerChunk.java
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@@ -33,8 +33,16 @@ public class PlayerChunk {
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public void run() {
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loadInProgress = false;
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PlayerChunk.this.chunk = PlayerChunk.this.playerChunkMap.getWorld().getChunkProviderServer().getChunkAt(location.x, location.z, true, true);
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+ markChunkUsed(); // Paper - delay chunk unloads
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}
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};
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+ // Paper start - delay chunk unloads
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+ public final void markChunkUsed() {
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+ if (chunk != null && chunk.scheduledForUnload != null) {
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+ chunk.scheduledForUnload = null;
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+ }
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+ }
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+ // Paper end
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// CraftBukkit end
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public PlayerChunk(PlayerChunkMap playerchunkmap, int i, int j) {
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@@ -44,6 +52,7 @@ public class PlayerChunk {
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chunkproviderserver.a(i, j);
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this.chunk = chunkproviderserver.getChunkAt(i, j, true, false);
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+ markChunkUsed(); // Paper - delay chunk unloads
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}
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public ChunkCoordIntPair a() {
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@@ -85,6 +94,7 @@ public class PlayerChunk {
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return true;
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} else {
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this.chunk = this.playerChunkMap.getWorld().getChunkProviderServer().getChunkAt(this.location.x, this.location.z, true, flag);
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+ markChunkUsed(); // Paper - delay chunk unloads
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return this.chunk != null;
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}
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}
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diff --git a/src/main/java/net/minecraft/server/PlayerChunkMap.java b/src/main/java/net/minecraft/server/PlayerChunkMap.java
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index 4d888d6d4f..cf5c76a78e 100644
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--- a/src/main/java/net/minecraft/server/PlayerChunkMap.java
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+++ b/src/main/java/net/minecraft/server/PlayerChunkMap.java
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@@ -461,7 +461,13 @@ public class PlayerChunkMap {
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Chunk chunk = playerchunk.f();
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if (chunk != null) {
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- this.getWorld().getChunkProviderServer().unload(chunk);
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+ // Paper start - delay chunk unloads
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+ if (world.paperConfig.delayChunkUnloadsBy <= 0) {
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+ this.getWorld().getChunkProviderServer().unload(chunk);
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+ } else {
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+ chunk.scheduledForUnload = System.currentTimeMillis();
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+ }
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+ // Paper end
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}
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}
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diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
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index 8005b0c110..c6fa54848e 100644
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--- a/src/main/java/net/minecraft/server/World.java
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+++ b/src/main/java/net/minecraft/server/World.java
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@@ -1329,7 +1329,13 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
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if (!tileentity.x() && tileentity.hasWorld()) {
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BlockPosition blockposition = tileentity.getPosition();
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- if (this.isLoaded(blockposition) && this.K.a(blockposition)) {
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+ // Paper start - Skip ticking in chunks scheduled for unload
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+ net.minecraft.server.Chunk chunk = this.getChunkIfLoaded(blockposition);
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+ boolean shouldTick = chunk != null;
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+ if(this.paperConfig.skipEntityTickingInChunksScheduledForUnload)
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+ shouldTick = shouldTick && chunk.scheduledForUnload == null;
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+ if (shouldTick && this.K.a(blockposition)) {
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+ // Paper end
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try {
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this.methodProfiler.a(() -> {
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return String.valueOf(TileEntityTypes.a(tileentity.C()));
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 9637c98994..6b3b45f94a 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -1620,7 +1620,7 @@ public class CraftWorld implements World {
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ChunkProviderServer cps = world.getChunkProviderServer();
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for (net.minecraft.server.Chunk chunk : cps.chunks.values()) {
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// If in use, skip it
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- if (isChunkInUse(chunk.locX, chunk.locZ)) {
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+ if (isChunkInUse(chunk.locX, chunk.locZ) || chunk.scheduledForUnload != null) { // Paper - delayed chunk unloads
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continue;
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}
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diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
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index a9b84fdec4..34d2f11f4f 100644
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--- a/src/main/java/org/spigotmc/ActivationRange.java
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+++ b/src/main/java/org/spigotmc/ActivationRange.java
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@@ -284,6 +284,11 @@ public class ActivationRange
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{
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isActive = false;
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}
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+ // Paper start - Skip ticking in chunks scheduled for unload
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+ else if (entity.world.paperConfig.skipEntityTickingInChunksScheduledForUnload && (chunk == null || chunk.scheduledForUnload != null)) {
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+ isActive = false;
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+ }
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+ // Paper end
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return isActive;
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}
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}
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--
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2.18.0
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