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Mirror von https://github.com/PaperMC/Paper.git synchronisiert 2024-12-15 02:50:09 +01:00
Paper/patches/server/0370-Hide-sync-chunk-writes-behind-flag.patch
Bjarne Koll c5a10665b8
Remove wall-time / unused skip tick protection (#11412)
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.
2024-09-19 16:36:07 +02:00

24 Zeilen
1.4 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Fri, 26 Jun 2020 22:35:08 -0700
Subject: [PATCH] Hide sync chunk writes behind flag
Syncing writes on each write call has terrible performance
on harddrives.
-DPaper.enable-sync-chunk-writes=true to enable
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java
index eb27ef574445e1311b763d84aa1b37128baa75f7..d6431376184e5650b370cbab204e28bc31f4dac6 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServerProperties.java
@@ -146,7 +146,7 @@ public class DedicatedServerProperties extends Settings<DedicatedServerPropertie
this.maxWorldSize = this.get("max-world-size", (integer) -> {
return Mth.clamp(integer, 1, 29999984);
}, 29999984);
- this.syncChunkWrites = this.get("sync-chunk-writes", true);
+ this.syncChunkWrites = this.get("sync-chunk-writes", true) && Boolean.getBoolean("Paper.enable-sync-chunk-writes"); // Paper - Hide sync chunk writes behind flag
this.regionFileComression = this.get("region-file-compression", "deflate");
this.enableJmxMonitoring = this.get("enable-jmx-monitoring", false);
this.enableStatus = this.get("enable-status", true);