Paper/patches/server/0408-Lazily-track-plugin-scoreboards-by-default.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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4.6 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Sat, 3 Oct 2020 04:15:09 -0400
Subject: [PATCH] Lazily track plugin scoreboards by default
On servers with plugins that constantly churn through scoreboards, there is a risk of
degraded GC performance due to the number of scoreboards held on by weak references.
Most plugins don't even need the (vanilla) functionality that requires all plugin
scoreboards to be tracked by the server. Instead, only track scoreboards when an
objective is added with a non-dummy criteria.
This is a breaking change, however the change is a much more sensible default. In case
this breaks your workflow you can always force all scoreboards to be tracked with
settings.track-plugin-scoreboards in paper.yml.
diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
index 5681630159bb52628e6cc391db324bbafe333414..c650fc3712de01184509a03f1d1b388859e163d7 100644
--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
+++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
@@ -20,6 +20,7 @@ import org.bukkit.scoreboard.Team;
public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
final Scoreboard board;
+ boolean registeredGlobally = false; // Paper - Lazily track plugin scoreboards by default
CraftScoreboard(Scoreboard board) {
this.board = board;
@@ -52,6 +53,12 @@ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
Preconditions.checkArgument(renderType != null, "RenderType cannot be null");
Preconditions.checkArgument(name.length() <= Short.MAX_VALUE, "The name '%s' is longer than the limit of 32767 characters (%s)", name, name.length());
Preconditions.checkArgument(this.board.getObjective(name) == null, "An objective of name '%s' already exists", name);
+ // Paper start - lazily track plugin scoreboards
+ if (((CraftCriteria) criteria).criteria != net.minecraft.world.scores.criteria.ObjectiveCriteria.DUMMY && !this.registeredGlobally) {
+ net.minecraft.server.MinecraftServer.getServer().server.getScoreboardManager().registerScoreboardForVanilla(this);
+ this.registeredGlobally = true;
+ }
+ // Paper end - lazily track plugin scoreboards
net.minecraft.world.scores.Objective objective = this.board.addObjective(name, ((CraftCriteria) criteria).criteria, io.papermc.paper.adventure.PaperAdventure.asVanilla(displayName), CraftScoreboardTranslations.fromBukkitRender(renderType), true, null);
return new CraftObjective(this, objective);
}
diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java
index 40e348cae063bc1a814f8fcc3a2688c135f23bb5..c7ca6210d6ae37fe95068c9baa5fb654f95307e0 100644
--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java
+++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java
@@ -30,6 +30,7 @@ public final class CraftScoreboardManager implements ScoreboardManager {
public CraftScoreboardManager(MinecraftServer minecraftserver, net.minecraft.world.scores.Scoreboard scoreboardServer) {
this.mainScoreboard = new CraftScoreboard(scoreboardServer);
+ mainScoreboard.registeredGlobally = true; // Paper
this.server = minecraftserver;
this.scoreboards.add(this.mainScoreboard);
}
@@ -43,10 +44,22 @@ public final class CraftScoreboardManager implements ScoreboardManager {
public CraftScoreboard getNewScoreboard() {
org.spigotmc.AsyncCatcher.catchOp("scoreboard creation"); // Spigot
CraftScoreboard scoreboard = new CraftScoreboard(new ServerScoreboard(this.server));
- this.scoreboards.add(scoreboard);
+ // Paper start
+ if (io.papermc.paper.configuration.GlobalConfiguration.get().scoreboards.trackPluginScoreboards) {
+ scoreboard.registeredGlobally = true;
+ scoreboards.add(scoreboard);
+ }
+ // Paper end
return scoreboard;
}
+ // Paper start
+ public void registerScoreboardForVanilla(CraftScoreboard scoreboard) {
+ org.spigotmc.AsyncCatcher.catchOp("scoreboard registration");
+ scoreboards.add(scoreboard);
+ }
+ // Paper end
+
// CraftBukkit method
public CraftScoreboard getPlayerBoard(CraftPlayer player) {
CraftScoreboard board = this.playerBoards.get(player);