53 lines
2.4 KiB
Diff
53 lines
2.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Spottedleaf <spottedleaf@spottedleaf.dev>
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Date: Sat, 4 Apr 2020 17:00:20 -0700
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Subject: [PATCH] Consolidate flush calls for entity tracker packets
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Most server packets seem to be sent from here, so try to avoid
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expensive flush calls from them.
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This change was motivated due to local testing:
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- My server spawn has 130 cows in it (for testing a prev. patch)
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- Try to let 200 players join spawn
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Without this change, I could only get 20 players on before they
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all started timing out due to the load put on the Netty I/O threads.
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With this change I could get all 200 on at 0ms ping.
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(one of the primary issues is that my CPU is kinda trash, and having
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4 extra threads at 100% is just too much for it).
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So in general this patch should reduce Netty I/O thread load.
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diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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index 6589baa5680a154e47e7e28223e2214ca36790f3..4a3dbcfdacb809d162663c379c4e8151be522432 100644
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--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
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@@ -1070,7 +1070,24 @@ public class ServerChunkCache extends ChunkSource {
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this.level.getProfiler().pop();
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}
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+ // Paper start - controlled flush for entity tracker packets
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+ List<net.minecraft.network.Connection> disabledFlushes = new java.util.ArrayList<>(this.level.players.size());
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+ for (ServerPlayer player : this.level.players) {
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+ net.minecraft.server.network.ServerGamePacketListenerImpl connection = player.connection;
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+ if (connection != null) {
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+ connection.connection.disableAutomaticFlush();
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+ disabledFlushes.add(connection.connection);
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+ }
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+ }
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+ try { // Paper end - controlled flush for entity tracker packets
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this.chunkMap.tick();
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+ // Paper start - controlled flush for entity tracker packets
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+ } finally {
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+ for (net.minecraft.network.Connection networkManager : disabledFlushes) {
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+ networkManager.enableAutomaticFlush();
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+ }
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+ }
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+ // Paper end - controlled flush for entity tracker packets
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}
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private void getFullChunk(long pos, Consumer<LevelChunk> chunkConsumer) {
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