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Paper/patches/server/1048-Incremental-chunk-and-player-saving.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation 
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sun, 9 Jun 2019 03:53:22 +0100
Subject: [PATCH] Incremental chunk and player saving
Feature patch
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 38b5eef0b5ff38f9a8dfa59822d7b41336108f49..b33b68649e67de08719b30e98650c84f4c3c18d6 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1007,7 +1007,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
try {
this.isSaving = true;
- this.getPlayerList().saveAll();
+ this.getPlayerList().saveAll(); // Paper - Incremental chunk and player saving; diff on change
flag3 = this.saveAllChunks(suppressLogs, flush, force);
} finally {
this.isSaving = false;
@@ -1655,9 +1655,29 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
--this.ticksUntilAutosave;
- if (this.autosavePeriod > 0 && this.ticksUntilAutosave <= 0) { // CraftBukkit
- this.autoSave();
+ // Paper start - Incremental chunk and player saving
+ final ProfilerFiller profiler = Profiler.get();
+ int playerSaveInterval = io.papermc.paper.configuration.GlobalConfiguration.get().playerAutoSave.rate;
+ if (playerSaveInterval < 0) {
+ playerSaveInterval = autosavePeriod;
+ }
+ profiler.push("save");
+ final boolean fullSave = autosavePeriod > 0 && this.tickCount % autosavePeriod == 0;
+ try {
+ this.isSaving = true;
+ if (playerSaveInterval > 0) {
+ this.playerList.saveAll(playerSaveInterval);
+ }
+ for (final ServerLevel level : this.getAllLevels()) {
+ if (level.paperConfig().chunks.autoSaveInterval.value() > 0) {
+ level.saveIncrementally(fullSave);
+ }
+ }
+ } finally {
+ this.isSaving = false;
}
+ profiler.pop();
+ // Paper end - Incremental chunk and player saving
ProfilerFiller gameprofilerfiller = Profiler.get();
diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index ff79925649ac1ceb6121c4b74fdb65f5f138f689..5f244cafe6c3cfb4a3bd08f9ae0f1a5aeec9b359 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1353,6 +1353,30 @@ public class ServerLevel extends Level implements ServerEntityGetter, WorldGenLe
return !this.server.isUnderSpawnProtection(this, pos, player) && this.getWorldBorder().isWithinBounds(pos);
}
+ // Paper start - Incremental chunk and player saving
+ public void saveIncrementally(boolean doFull) {
+ ServerChunkCache chunkproviderserver = this.getChunkSource();
+
+ if (doFull) {
+ org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld()));
+ }
+
+ if (doFull) {
+ this.saveLevelData(true);
+ }
+ // chunk autosave is already called by the ChunkSystem during unload processing (ChunkMap#processUnloads)
+ // Copied from save()
+ // CraftBukkit start - moved from MinecraftServer.saveChunks
+ if (doFull) { // Paper
+ ServerLevel worldserver1 = this;
+ this.serverLevelData.setWorldBorder(worldserver1.getWorldBorder().createSettings());
+ this.serverLevelData.setCustomBossEvents(this.server.getCustomBossEvents().save(this.registryAccess()));
+ this.convertable.saveDataTag(this.server.registryAccess(), this.serverLevelData, this.server.getPlayerList().getSingleplayerData());
+ }
+ // CraftBukkit end
+ }
+ // Paper end - Incremental chunk and player saving
+
public void save(@Nullable ProgressListener progressListener, boolean flush, boolean savingDisabled) {
// Paper start - add close param
this.save(progressListener, flush, savingDisabled, false);
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index dda53c52fab7c02f39451335fe0bfe36852ac994..167ab6346edb8f29c29a7327f031c0f5df71acf1 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -221,6 +221,7 @@ import org.bukkit.inventory.MainHand;
public class ServerPlayer extends net.minecraft.world.entity.player.Player implements ca.spottedleaf.moonrise.patches.chunk_system.player.ChunkSystemServerPlayer { // Paper - rewrite chunk system
private static final Logger LOGGER = LogUtils.getLogger();
+ public long lastSave = MinecraftServer.currentTick; // Paper - Incremental chunk and player saving
private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_XZ = 32;
private static final int NEUTRAL_MOB_DEATH_NOTIFICATION_RADII_Y = 10;
private static final int FLY_STAT_RECORDING_SPEED = 25;
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 47664c545e3f58719f55366bac05732dbfe3c00a..a03ff473a683611670ee274b0eec5a395ee6981a 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -518,6 +518,7 @@ public abstract class PlayerList {
protected void save(ServerPlayer player) {
if (!player.getBukkitEntity().isPersistent()) return; // CraftBukkit
+ player.lastSave = MinecraftServer.currentTick; // Paper - Incremental chunk and player saving
this.playerIo.save(player);
ServerStatsCounter serverstatisticmanager = (ServerStatsCounter) player.getStats(); // CraftBukkit
@@ -1152,9 +1153,21 @@ public abstract class PlayerList {
}
public void saveAll() {
+ // Paper start - Incremental chunk and player saving
+ this.saveAll(-1);
+ }
+
+ public void saveAll(int interval) {
io.papermc.paper.util.MCUtil.ensureMain("Save Players" , () -> { // Paper - Ensure main
+ int numSaved = 0;
+ long now = MinecraftServer.currentTick;
for (int i = 0; i < this.players.size(); ++i) {
- this.save((ServerPlayer) this.players.get(i));
+ final ServerPlayer player = this.players.get(i);
+ if (interval == -1 || now - player.lastSave >= interval) {
+ this.save(player);
+ if (interval != -1 && ++numSaved >= io.papermc.paper.configuration.GlobalConfiguration.get().playerAutoSave.maxPerTick()) { break; }
+ }
+ // Paper end - Incremental chunk and player saving
}
return null; }); // Paper - ensure main
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