PaperMC/patches/server/0747-Consolidate-flush-calls-for-entity-tracker-packets.patch
Nassim Jahnke ef0e5a642d
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
9ae3f10f SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API
48c0c547 PR-786: Add methods to get sounds from entities

CraftBukkit Changes:
5cc9c022a SPIGOT-7152: Handle hand item changing during air interact event
4ffa1acf6 SPIGOT-7154: Players get kicked when interacting with a conversation
4daa21123 SPIGOT-3842: Add Player#fireworkBoost() and expand Firework API
e5d6a9bbf PR-1100: Add methods to get sounds from entities
b7e9f1c8b SPIGOT-7146: Reduce use of Material switch in ItemMeta

Spigot Changes:
4c157bb4 Rebuild patches
2022-09-12 13:31:45 +02:00

52 lines
2.5 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <spottedleaf@spottedleaf.dev>
Date: Sat, 4 Apr 2020 17:00:20 -0700
Subject: [PATCH] Consolidate flush calls for entity tracker packets
Most server packets seem to be sent from here, so try to avoid
expensive flush calls from them.
This change was motivated due to local testing:
- My server spawn has 130 cows in it (for testing a prev. patch)
- Try to let 200 players join spawn
Without this change, I could only get 20 players on before they
all started timing out due to the load put on the Netty I/O threads.
With this change I could get all 200 on at 0ms ping.
(one of the primary issues is that my CPU is kinda trash, and having
4 extra threads at 100% is just too much for it).
So in general this patch should reduce Netty I/O thread load.
diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
index 98e279e5330b45d0587d1afebddaf876e9802e33..4c82f17313e18c9dfd9b28653715b8a3242b826c 100644
--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
@@ -893,7 +893,24 @@ public class ServerChunkCache extends ChunkSource {
this.level.timings.broadcastChunkUpdates.stopTiming(); // Paper - timing
gameprofilerfiller.pop();
// Paper end - use set of chunks requiring updates, rather than iterating every single one loaded
+ // Paper start - controlled flush for entity tracker packets
+ List<net.minecraft.network.Connection> disabledFlushes = new java.util.ArrayList<>(this.level.players.size());
+ for (ServerPlayer player : this.level.players) {
+ net.minecraft.server.network.ServerGamePacketListenerImpl connection = player.connection;
+ if (connection != null) {
+ connection.connection.disableAutomaticFlush();
+ disabledFlushes.add(connection.connection);
+ }
+ }
+ try { // Paper end - controlled flush for entity tracker packets
this.chunkMap.tick();
+ // Paper start - controlled flush for entity tracker packets
+ } finally {
+ for (net.minecraft.network.Connection networkManager : disabledFlushes) {
+ networkManager.enableAutomaticFlush();
+ }
+ }
+ // Paper end - controlled flush for entity tracker packets
}
}