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Optimize Network Manager to not need synchronization

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Removes synchronization from sending packets
Makes normal packet sends no longer need to be wrapped and queued like it use to work.
Adds more packet queue immunities on top of keep alive to let the following scenarios go out
without delay:
  - Keep Alive
  - Chat
  - Kick
  - All of the packets during the Player Joined World event

Hoping that latter one helps join timeout issues more too for slow connections.

Removes processing packet queue off of main thread
  - for the few cases where it is allowed, order is not necessary nor
    should it even be happening concurrently in first place (handshaking/login/status)

Ensures packets sent asynchronously are dispatched on main thread

This helps ensure safety for ProtocolLib as packet listeners
are commonly accessing world state. This will allow you to schedule
a packet to be sent async, but itll be dispatched sync for packet
listeners to process.

This should solve some deadlock risks

This may provide a decent performance improvement because thread synchronization incurs a cache reset
so by avoiding ever entering a synchronized block, we get to avoid that, and packet sending is a really
hot activity.
This commit is contained in:
Aikar
2020-05-06 05:22:03 -04:00
parent 30d007b163
commit fd5c98a9ef
141 changed files with 604 additions and 505 deletions
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6
Spigot-Server-Patches/Allow-Saving-of-Oversized-Chunks.patch
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@@ -31,7 +31,7 @@ this fix, as the data will remain in the oversized file. Once the server returns
to a jar with this fix, the data will be restored.
diff --git a/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java b/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java
index db66d4ac7d..2322c0c8c5 100644
index db66d4ac7dc..2322c0c8c5a 100644
--- a/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java
+++ b/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java
@@ -0,0 +0,0 @@ public class NBTCompressedStreamTools {
@@ -51,7 +51,7 @@ index db66d4ac7d..2322c0c8c5 100644
a((NBTBase) nbttagcompound, dataoutput);
}
diff --git a/src/main/java/net/minecraft/server/RegionFile.java b/src/main/java/net/minecraft/server/RegionFile.java
index cee1ea8f43..6b543f89d4 100644
index cee1ea8f43e..6b543f89d4e 100644
--- a/src/main/java/net/minecraft/server/RegionFile.java
+++ b/src/main/java/net/minecraft/server/RegionFile.java
@@ -0,0 +0,0 @@ import java.nio.file.Files;
@@ -156,7 +156,7 @@ index cee1ea8f43..6b543f89d4 100644
private final ChunkCoordIntPair b;
diff --git a/src/main/java/net/minecraft/server/RegionFileCache.java b/src/main/java/net/minecraft/server/RegionFileCache.java
index 5065ece393..942b7d3239 100644
index 5065ece393a..942b7d32393 100644
--- a/src/main/java/net/minecraft/server/RegionFileCache.java
+++ b/src/main/java/net/minecraft/server/RegionFileCache.java
@@ -0,0 +0,0 @@ public final class RegionFileCache implements AutoCloseable {