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Improve Chunk Prioritization and Internal Scheduler

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In previous MC versions, we had a rather simple internal scheduler
for delayed tasks that would just keep pushing task back until desired
tick was reached.

The method it called to schedule the task changed behavior in 1.14, and now
this scheduler is not working nowhere near what it was supposed to be doing.

This was causing long delayed task to eat up CPU (In Oversleep for example)

Rewrite this to just use the CraftScheduler for scheduling delayed tasks.

Once this was fixed, it became quite clear the code that delayed ticket
additions for chunks based on distance was clearly not right, as it was
tested on the previous broken logic.

So the ticket delay process has been vastly revamped to be even smarter.
Chunks behind the player can load slower than the chunks in front of the player.
We also can delay ticket adding until one of its neighbors has loaded, as
this lets us get a smoother spiral out for the chunks (minus frustum intent).

Additionally on frustum previous commit inadvertently broke frustum trying to
fix an issue when the real fix lied elsewhere, so restore chunk priority so
it works again.
This commit is contained in:
Aikar 2020-06-09 03:17:25 -04:00
parent 24a2e80431
commit b2d81e21c5
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GPG key ID: 401ADFC9891FAAFE
19 changed files with 417 additions and 162 deletions
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6
Spigot-Server-Patches/0154-Basic-PlayerProfile-API.patch
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@ -403,7 +403,7 @@ index 0000000000000000000000000000000000000000..3aceb0ea8a1a3ed94dd8a9e954c52ecd
+ }
+}
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
index aaa6e33b0e5df2549e4f989501bacfd1ab4ad063..8ebe5a2e2678fccb17aced57f6fd1e52c17935db 100644
index 16302c4ac6d3e40318a762cea0afcf3f94715216..148917547bb7a626d1b2bacce7385607043db7e2 100644
--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -1,8 +1,11 @@
@ -418,7 +418,7 @@ index aaa6e33b0e5df2549e4f989501bacfd1ab4ad063..8ebe5a2e2678fccb17aced57f6fd1e52
import org.bukkit.Location;
import org.bukkit.block.BlockFace;
import org.bukkit.craftbukkit.CraftWorld;
@@ -355,6 +358,10 @@ public final class MCUtil {
@@ -337,6 +340,10 @@ public final class MCUtil {
return run.get();
}
@ -430,7 +430,7 @@ index aaa6e33b0e5df2549e4f989501bacfd1ab4ad063..8ebe5a2e2678fccb17aced57f6fd1e52
* Calculates distance between 2 entities
* @param e1
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 87595425a358a13c8f2393619d51a981140556cf..4a513aaea587414cf6abc1c136e52420d59688d8 100644
index ed32242bd169e9f28607942aa31aa48a5799b215..54f80cb8e1b771f2a493543e04f8bc8346a391dc 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1304,7 +1304,7 @@ public abstract class MinecraftServer extends IAsyncTaskHandlerReentrant<TickTas