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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
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
794 changed files with 402 additions and 282 deletions
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46
patches/server/0464-Add-PlayerLecternPageChangeEvent.patch Normal file
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@ -0,0 +1,46 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Mon, 23 Nov 2020 12:58:51 -0800
Subject: [PATCH] Add PlayerLecternPageChangeEvent
diff --git a/src/main/java/net/minecraft/world/inventory/LecternMenu.java b/src/main/java/net/minecraft/world/inventory/LecternMenu.java
index 1b3119751617366cf753008d38be566cd7ee2453..df4ae5d37b9aa5b8fb26c5773a47a5a85f831982 100644
--- a/src/main/java/net/minecraft/world/inventory/LecternMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/LecternMenu.java
@@ -64,6 +64,7 @@ public class LecternMenu extends AbstractContainerMenu {
@Override
public boolean clickMenuButton(net.minecraft.world.entity.player.Player player, int id) {
int j;
+ io.papermc.paper.event.player.PlayerLecternPageChangeEvent playerLecternPageChangeEvent; CraftInventoryLectern bukkitView; // Paper - Add PlayerLecternPageChangeEvent
if (id >= 100) {
j = id - 100;
@@ -73,11 +74,25 @@ public class LecternMenu extends AbstractContainerMenu {
switch (id) {
case 1:
j = this.lecternData.get(0);
- this.setData(0, j - 1);
+ // Paper start - Add PlayerLecternPageChangeEvent
+ bukkitView = (CraftInventoryLectern) getBukkitView().getTopInventory();
+ playerLecternPageChangeEvent = new io.papermc.paper.event.player.PlayerLecternPageChangeEvent((org.bukkit.entity.Player) player.getBukkitEntity(), bukkitView.getHolder(), bukkitView.getBook(), io.papermc.paper.event.player.PlayerLecternPageChangeEvent.PageChangeDirection.LEFT, j, j - 1);
+ if (!playerLecternPageChangeEvent.callEvent()) {
+ return false;
+ }
+ this.setData(0, playerLecternPageChangeEvent.getNewPage());
+ // Paper end - Add PlayerLecternPageChangeEvent
return true;
case 2:
j = this.lecternData.get(0);
- this.setData(0, j + 1);
+ // Paper start - Add PlayerLecternPageChangeEvent
+ bukkitView = (CraftInventoryLectern) getBukkitView().getTopInventory();
+ playerLecternPageChangeEvent = new io.papermc.paper.event.player.PlayerLecternPageChangeEvent((org.bukkit.entity.Player) player.getBukkitEntity(), bukkitView.getHolder(), bukkitView.getBook(), io.papermc.paper.event.player.PlayerLecternPageChangeEvent.PageChangeDirection.RIGHT, j, j + 1);
+ if (!playerLecternPageChangeEvent.callEvent()) {
+ return false;
+ }
+ this.setData(0, playerLecternPageChangeEvent.getNewPage());
+ // Paper end - Add PlayerLecternPageChangeEvent
return true;
case 3:
if (!player.mayBuild()) {