108 lines
5.7 KiB
Diff
108 lines
5.7 KiB
Diff
From 0000000000000000000000000000000000000000 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 will be handled by the ticket expiry process.
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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 e661a3d19f6e9fc7e7e55574222865487d7a817a..d7e2d0625fe113387f9475688d38be515673d986 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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@@ -659,4 +659,13 @@ public class PaperWorldConfig {
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expMergeMaxValue = getInt("experience-merge-max-value", -1);
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log("Experience Merge Max Value: " + expMergeMaxValue);
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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 *= 20;
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+ }
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+ }
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}
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diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java
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index 95f195980e28bb59f43e5ca1d5e79ebe8c3ddaea..84dc1e94b4f7b8315d8422634dd49b1f85044d18 100644
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--- a/src/main/java/net/minecraft/server/level/DistanceManager.java
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+++ b/src/main/java/net/minecraft/server/level/DistanceManager.java
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@@ -197,6 +197,27 @@ public abstract class DistanceManager {
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boolean removed = false; // CraftBukkit
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if (arraysetsorted.remove(ticket)) {
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removed = true; // CraftBukkit
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+ // Paper start - delay chunk unloads for player tickets
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+ long delayChunkUnloadsBy = chunkMap.level.paperConfig.delayChunkUnloadsBy;
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+ if (ticket.getType() == TicketType.PLAYER && delayChunkUnloadsBy > 0) {
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+ boolean hasPlayer = false;
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+ for (Ticket<?> ticket1 : arraysetsorted) {
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+ if (ticket1.getType() == TicketType.PLAYER) {
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+ hasPlayer = true;
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+ break;
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+ }
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+ }
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+ ChunkHolder playerChunk = chunkMap.getUpdatingChunkIfPresent(i);
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+ if (!hasPlayer && playerChunk != null && playerChunk.isFullChunkReady()) {
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+ Ticket<Long> delayUnload = new Ticket<Long>(TicketType.DELAY_UNLOAD, 33, i);
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+ delayUnload.delayUnloadBy = delayChunkUnloadsBy;
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+ delayUnload.setCreatedTick(this.ticketTickCounter);
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+ arraysetsorted.remove(delayUnload);
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+ // refresh ticket
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+ arraysetsorted.add(delayUnload);
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+ }
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+ }
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+ // Paper end
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}
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if (arraysetsorted.isEmpty()) {
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diff --git a/src/main/java/net/minecraft/server/level/Ticket.java b/src/main/java/net/minecraft/server/level/Ticket.java
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index ffc43e5d3d0563c9e9c171064511b2c65ddf67e1..f1128f0d4a9a0241ac6c9bc18dd13b431c616bb1 100644
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--- a/src/main/java/net/minecraft/server/level/Ticket.java
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+++ b/src/main/java/net/minecraft/server/level/Ticket.java
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@@ -7,11 +7,13 @@ public final class Ticket<T> implements Comparable<Ticket<?>> {
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private final int ticketLevel;
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public final T key;
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public long createdTick;
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+ public long delayUnloadBy; // Paper
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protected Ticket(TicketType<T> type, int level, T argument) {
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this.type = type;
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this.ticketLevel = level;
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this.key = argument;
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+ this.delayUnloadBy = type.timeout; // Paper
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}
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@Override
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@@ -60,7 +62,7 @@ public final class Ticket<T> implements Comparable<Ticket<?>> {
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}
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protected boolean timedOut(long currentTick) {
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- long l = this.type.timeout();
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+ long l = delayUnloadBy; // Paper
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return l != 0L && currentTick - this.createdTick > l;
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}
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}
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diff --git a/src/main/java/net/minecraft/server/level/TicketType.java b/src/main/java/net/minecraft/server/level/TicketType.java
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index 78fbb4c3e52e900956ae0811aaf934c81ee5ea48..8770fe0db46b01e8b608637df4f1a669a3f4cdde 100644
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--- a/src/main/java/net/minecraft/server/level/TicketType.java
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+++ b/src/main/java/net/minecraft/server/level/TicketType.java
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@@ -28,6 +28,7 @@ public class TicketType<T> {
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public static final TicketType<ChunkPos> UNKNOWN = TicketType.create("unknown", Comparator.comparingLong(ChunkPos::toLong), 1);
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public static final TicketType<Unit> PLUGIN = TicketType.create("plugin", (a, b) -> 0); // CraftBukkit
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public static final TicketType<org.bukkit.plugin.Plugin> PLUGIN_TICKET = TicketType.create("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // CraftBukkit
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+ public static final TicketType<Long> DELAY_UNLOAD = create("delay_unload", Long::compareTo, 300); // Paper
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public static <T> TicketType<T> create(String name, Comparator<T> argumentComparator) {
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return new TicketType<>(name, argumentComparator, 0L);
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