184 lines
8.5 KiB
Diff
184 lines
8.5 KiB
Diff
From 6b71f1dfeb183e977699e690bc59fa6e0acae336 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 ce43e7bb7..e35e72e8b 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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@@ -344,4 +344,18 @@ public class PaperWorldConfig {
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private void isHopperPushBased() {
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isHopperPushBased = getBoolean("hopper.push-based", false);
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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 857df2937..cc9c8b2e0 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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@@ -30,6 +30,7 @@ public class Chunk {
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private boolean j;
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public final World world;
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public final int[] 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 m;
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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 5cc192bbd..47159bff3 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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@@ -315,6 +315,19 @@ public class ChunkProviderServer implements IChunkProvider {
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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.chunkLoader.b();
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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 3d30e1831..48a008e0a 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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@@ -32,8 +32,16 @@ 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().getOrLoadChunkAt(location.x, location.z);
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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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@@ -42,6 +50,7 @@ public class PlayerChunk {
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// CraftBukkit start
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loadInProgress = true;
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this.chunk = playerchunkmap.getWorld().getChunkProviderServer().getChunkAt(i, j, loadedRunnable, false);
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+ markChunkUsed(); // Paper - delay chunk unloads
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// CraftBukkit end
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}
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@@ -110,6 +119,7 @@ public class PlayerChunk {
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if (!loadInProgress) {
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loadInProgress = true;
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this.chunk = playerChunkMap.getWorld().getChunkProviderServer().getChunkAt(this.location.x, this.location.z, loadedRunnable, flag);
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+ markChunkUsed(); // Paper - delay chunk unloads
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}
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// CraftBukkit end
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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 ad1d90b56..0b10f1684 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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@@ -487,7 +487,13 @@ 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 eca4903ed..36a78daff 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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@@ -1594,7 +1594,13 @@ public abstract class World implements IBlockAccess {
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if (!tileentity.y() && tileentity.u()) {
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BlockPosition blockposition = tileentity.getPosition();
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- if (this.isLoaded(blockposition) && this.P.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.isUnloading() && chunk.scheduledForUnload == null;
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+ if (shouldTick && this.P.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(TileEntity.a(tileentity.getClass()));
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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 69dc11e2b..284dc6391 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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@@ -1576,7 +1576,7 @@ 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 47865c027..b79bf70f0 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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@@ -283,6 +283,10 @@ 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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+ if(entity.world.paperConfig.skipEntityTickingInChunksScheduledForUnload && (chunk == null || chunk.isUnloading() || chunk.scheduledForUnload != null))
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+ isActive = false;
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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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