From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Spottedleaf 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 bbe69b5b2b1b7ccd3358325c9a65e7e197dfa7f2..d5a4e7d0ba2aff89e9aec64c8545c105926dcab4 100644 --- a/src/main/java/net/minecraft/Util.java +++ b/src/main/java/net/minecraft/Util.java @@ -131,7 +131,19 @@ 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;