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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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50
patches/server/0463-Add-BlockFailedDispenseEvent.patch Normal file
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@ -0,0 +1,50 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: TheViperShow <29604693+TheViperShow@users.noreply.github.com>
Date: Wed, 22 Apr 2020 09:40:38 +0200
Subject: [PATCH] Add BlockFailedDispenseEvent
diff --git a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
index c7256ffbe57c594556ee85134c9ab166f8c0e0c7..94bcbaf7daf7dfe566f508d1170a433930d9d49a 100644
--- a/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DispenserBlock.java
@@ -101,8 +101,10 @@ public class DispenserBlock extends BaseEntityBlock {
int i = tileentitydispenser.getRandomSlot(world.random);
if (i < 0) {
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFailedDispenseEvent(world, pos)) { // Paper - Add BlockFailedDispenseEvent
world.levelEvent(1001, pos, 0);
world.gameEvent((Holder) GameEvent.BLOCK_ACTIVATE, pos, GameEvent.Context.of(tileentitydispenser.getBlockState()));
+ } // Paper - Add BlockFailedDispenseEvent
} else {
ItemStack itemstack = tileentitydispenser.getItem(i);
DispenseItemBehavior idispensebehavior = this.getDispenseMethod(world, itemstack);
diff --git a/src/main/java/net/minecraft/world/level/block/DropperBlock.java b/src/main/java/net/minecraft/world/level/block/DropperBlock.java
index a08e8571f3a83afc80c2f1758a9029cd28ed6947..91b514967405115f22edf4255775361a672e5c2f 100644
--- a/src/main/java/net/minecraft/world/level/block/DropperBlock.java
+++ b/src/main/java/net/minecraft/world/level/block/DropperBlock.java
@@ -60,6 +60,7 @@ public class DropperBlock extends DispenserBlock {
int i = tileentitydispenser.getRandomSlot(world.random);
if (i < 0) {
+ if (org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockFailedDispenseEvent(world, pos)) // Paper - Add BlockFailedDispenseEvent
world.levelEvent(1001, pos, 0);
} else {
ItemStack itemstack = tileentitydispenser.getItem(i);
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index 24fcb0eb139174671ffb7a8e5222ec9833835f87..9e67dc35ea12149265517b951a96828460b2ca67 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -2127,4 +2127,12 @@ public class CraftEventFactory {
return org.bukkit.craftbukkit.inventory.CraftItemStack.asNMSCopy(event.getPotion());
}
// Paper end - WitchReadyPotionEvent
+
+ // Paper start
+ public static boolean handleBlockFailedDispenseEvent(ServerLevel serverLevel, BlockPos pos) {
+ org.bukkit.block.Block block = CraftBlock.at(serverLevel, pos);
+ io.papermc.paper.event.block.BlockFailedDispenseEvent event = new io.papermc.paper.event.block.BlockFailedDispenseEvent(block);
+ return event.callEvent();
+ }
+ // Paper end
}