Paper/patches/server/0736-Reduce-worldgen-thread-worker-count-for-low-core-cou.patch
Nassim Jahnke 928bcc8d3a
Updated Upstream (Bukkit/CraftBukkit) (#8430)
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:
09943450 Update SnakeYAML version
5515734f SPIGOT-7162: Incorrect description for Entity#getVehicle javadoc
6f82b381 PR-788: Add getHand() to all relevant events

CraftBukkit Changes:
aaf484f6f SPIGOT-7163: CraftMerchantRecipe doesn't copy demand and specialPrice from BukkitMerchantRecipe
5329dd6fd PR-1107: Add getHand() to all relevant events
93061706e SPIGOT-7045: Ocelots never spawn with babies with spawn reason OCELOT_BABY
2022-10-02 09:56:36 +02:00

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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 384ddb03af26ae360fd22e2e231d9d14d6ad0865..23a999c19809a4fb62b37400e3767dc44692adb3 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;