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Spigot still maintains some partial implementation of "tick skipping", a practice in which the MinecraftServer.currentTick field is updated not by an increment of one per actual tick, but instead set to System.currentTimeMillis() / 50. This behaviour means that the tracked tick may "skip" a tick value in case a previous tick took more than the expected 50ms. To compensate for this in important paths, spigot/craftbukkit implements "wall-time". Instead of incrementing/decrementing ticks on block entities/entities by one for each call to their tick() method, they instead increment/decrement important values, like an ItemEntity's age or pickupDelay, by the difference of `currentTick - lastTick`, where `lastTick` is the value of `currentTick` during the last tick() call. These "fixes" however do not play nicely with minecraft's simulation distance as entities/block entities implementing the above behaviour would "catch up" their values when moving from a non-ticking chunk to a ticking one as their `lastTick` value remains stuck on the last tick in a ticking chunk and hence lead to a large "catch up" once ticked again. Paper completely removes the "tick skipping" behaviour (See patch "Further-improve-server-tick-loop"), making the above precautions completely unnecessary, which also rids paper of the previous described incompatibility with non-ticking chunks.
48 Zeilen
3.0 KiB
Diff
48 Zeilen
3.0 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Shane Freeder <theboyetronic@gmail.com>
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Date: Sun, 18 Sep 2022 06:33:17 +0100
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Subject: [PATCH] Configurable chat thread limit
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By default, spigot shifts chat over to an unbounded thread pool,
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on a normal server, this really offers no gains, the creation of a thread
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on submitting to the pool on these servers eats more time vs just running it in
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the netty pipeline, however, on servers using plugins which do work in here, there
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could be some overall benefits to moving this stuff outside of the pipeline.
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In general, this patch does two things:
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1) Exposes the core size for the pool, this allows for ensuring that a number of threads
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sit around in the pool, mitigating the need for creating new threads; This IS however
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caveated, the ThreadPoolExecutor will ONLY create core threads as they're needed, it
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just won't allow for us to dip back under the # of core threads, this can potentially
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be mitigated by calling prestartCoreThread, however, I'm not sure if there is much justification
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for this
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2) Exposes a max size for the pool, as stated, by default this is unbounded, for most
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servers limiting the size of the pool is going to have 0 effects given how fast chat
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is actually processed, this is honestly really just exposed for the misnomers or people
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who just wanna ensure that this won't grow over a specific size if chat gets stupidly active
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diff --git a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java
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index 45ab7ff5497ceccb85944d2e8d354d9c860abf3b..917bd0c1dd8f356edc3741ee59d24e4d090af182 100644
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--- a/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java
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+++ b/src/main/java/io/papermc/paper/configuration/GlobalConfiguration.java
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@@ -296,7 +296,18 @@ public class GlobalConfiguration extends ConfigurationPart {
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@PostProcess
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private void postProcess() {
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- // TODO: fill in separate patch
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+ //noinspection ConstantConditions
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+ if (net.minecraft.server.MinecraftServer.getServer() == null) return; // In testing env, this will be null here
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+ int _chatExecutorMaxSize = (this.chatExecutorMaxSize <= 0) ? Integer.MAX_VALUE : this.chatExecutorMaxSize; // This is somewhat dumb, but, this is the default, do we cap this?;
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+ int _chatExecutorCoreSize = Math.max(this.chatExecutorCoreSize, 0);
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+
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+ if (_chatExecutorMaxSize < _chatExecutorCoreSize) {
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+ _chatExecutorMaxSize = _chatExecutorCoreSize;
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+ }
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+
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+ java.util.concurrent.ThreadPoolExecutor executor = (java.util.concurrent.ThreadPoolExecutor) net.minecraft.server.MinecraftServer.getServer().chatExecutor;
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+ executor.setCorePoolSize(_chatExecutorCoreSize);
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+ executor.setMaximumPoolSize(_chatExecutorMaxSize);
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}
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}
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public int maxJoinsPerTick = 5;
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