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Remove wall-time / unused skip tick protection (#11412)

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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.
This commit is contained in:
Bjarne Koll 2024-09-19 16:36:07 +02:00 • committed by GitHub
parent 5c82955733
commit c5a10665b8
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GPG key ID: B5690EEEBB952194
794 changed files with 402 additions and 282 deletions
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61
patches/server/0494-fix-converting-txt-to-json-file.patch Normal file
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@ -0,0 +1,61 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 4 Jan 2021 19:49:15 -0800
Subject: [PATCH] fix converting txt to json file
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedPlayerList.java b/src/main/java/net/minecraft/server/dedicated/DedicatedPlayerList.java
index 929f59bce01c8e6ed4b0b551744d42e131b8fc80..22c4f8dea99f92a1eb3da2baf0a15bf9d2ca0462 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedPlayerList.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedPlayerList.java
@@ -18,6 +18,11 @@ public class DedicatedPlayerList extends PlayerList {
this.setViewDistance(dedicatedServerProperties.viewDistance);
this.setSimulationDistance(dedicatedServerProperties.simulationDistance);
super.setUsingWhiteList(dedicatedServerProperties.whiteList.get());
+ // Paper start - fix converting txt to json file; moved from constructor
+ }
+ @Override
+ public void loadAndSaveFiles() {
+ // Paper end - fix converting txt to json file
this.loadUserBanList();
this.saveUserBanList();
this.loadIpBanList();
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 2b1d7a2360a9ee7bca9d93a2dc8c61d1648a8348..d5153f804cfcfd1a70c46975e3fb1e50c8a82999 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -216,6 +216,12 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
this.paperConfigurations.initializeGlobalConfiguration(this.registryAccess());
this.paperConfigurations.initializeWorldDefaultsConfiguration(this.registryAccess());
// Paper end - initialize global and world-defaults configuration
+ // Paper start - fix converting txt to json file; convert old users earlier after PlayerList creation but before file load/save
+ if (this.convertOldUsers()) {
+ this.getProfileCache().save(false); // Paper
+ }
+ this.getPlayerList().loadAndSaveFiles(); // Must be after convertNames
+ // Paper end - fix converting txt to json file
org.spigotmc.WatchdogThread.doStart(org.spigotmc.SpigotConfig.timeoutTime, org.spigotmc.SpigotConfig.restartOnCrash); // Paper - start watchdog thread
io.papermc.paper.command.PaperCommands.registerCommands(this); // Paper - setup /paper command
com.destroystokyo.paper.Metrics.PaperMetrics.startMetrics(); // Paper - start metrics
@@ -270,9 +276,6 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
DedicatedServer.LOGGER.warn("To change this, set \"online-mode\" to \"true\" in the server.properties file.");
}
- if (this.convertOldUsers()) {
- this.getProfileCache().save(false); // Paper - Perf: Async GameProfileCache saving
- }
if (!OldUsersConverter.serverReadyAfterUserconversion(this)) {
return false;
diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
index 9b94ca912f99a3a465f30130b24347fc9aca72ff..123fe4f5b98a7483af86695ec82987abd45eafb2 100644
--- a/src/main/java/net/minecraft/server/players/PlayerList.java
+++ b/src/main/java/net/minecraft/server/players/PlayerList.java
@@ -179,6 +179,7 @@ public abstract class PlayerList {
this.maxPlayers = maxPlayers;
this.playerIo = saveHandler;
}
+ abstract public void loadAndSaveFiles(); // Paper - fix converting txt to json file; moved from DedicatedPlayerList constructor
public void placeNewPlayer(Connection connection, ServerPlayer player, CommonListenerCookie clientData) {
player.isRealPlayer = true; // Paper