Paper/patches/server/0722-Reduce-worldgen-thread-worker-count-for-low-core-cou.patch
2023-03-14 21:58:00 +01:00

32 lines
1.4 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 30 Aug 2021 04:26:40 -0700
Subject: [PATCH] Reduce worldgen thread worker count for low core count CPUs
diff --git a/src/main/java/net/minecraft/Util.java b/src/main/java/net/minecraft/Util.java
index f4935f7fc3cbd6ba8f079def43bd735364a2ce87..0d61682b91b38500e755ded2226cd30f3a16af5a 100644
--- a/src/main/java/net/minecraft/Util.java
+++ b/src/main/java/net/minecraft/Util.java
@@ -146,7 +146,19 @@ public class Util {
private static ExecutorService makeExecutor(String s, int priorityModifier) { // Paper - add priority
// Paper start - use simpler thread pool that allows 1 thread
- int i = Math.min(8, Math.max(Runtime.getRuntime().availableProcessors() - 2, 1));
+ // Paper start - also try to avoid suffocating the system with the worldgen workers
+ int cpus = Runtime.getRuntime().availableProcessors() / 2;
+ int i;
+ if (cpus <= 4) {
+ i = cpus <= 2 ? 1 : 2;
+ } else if (cpus <= 8) {
+ // [5, 8]
+ i = Math.max(3, cpus - 2);
+ } else {
+ i = cpus * 2 / 3;
+ }
+ i = Math.min(8, i);
+ // Paper end - also try to avoid suffocating the system with the worldgen workers
i = Integer.getInteger("Paper.WorkerThreadCount", i);
ExecutorService executorService;