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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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8
Spigot-Server-Patches/Implement-Brigadier-Mojang-API.patch
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@@ -10,7 +10,7 @@ Adds CommandRegisteredEvent
- Allows manipulating the CommandNode to add more children/metadata for the client
diff --git a/src/main/java/net/minecraft/server/CommandDispatcher.java b/src/main/java/net/minecraft/server/CommandDispatcher.java
index 2414b0a552..2d512aa4f9 100644
index 2414b0a552e..2d512aa4f9a 100644
--- a/src/main/java/net/minecraft/server/CommandDispatcher.java
+++ b/src/main/java/net/minecraft/server/CommandDispatcher.java
@@ -0,0 +0,0 @@ public class CommandDispatcher {
@@ -30,7 +30,7 @@ index 2414b0a552..2d512aa4f9 100644
event.getPlayer().getServer().getPluginManager().callEvent(event);
diff --git a/src/main/java/net/minecraft/server/CommandListenerWrapper.java b/src/main/java/net/minecraft/server/CommandListenerWrapper.java
index 0b23a0548d..c988c929f1 100644
index 0b23a0548d5..c988c929f10 100644
--- a/src/main/java/net/minecraft/server/CommandListenerWrapper.java
+++ b/src/main/java/net/minecraft/server/CommandListenerWrapper.java
@@ -0,0 +0,0 @@ import java.util.function.BinaryOperator;
@@ -69,7 +69,7 @@ index 0b23a0548d..c988c929f1 100644
public boolean hasPermission(int i) {
// CraftBukkit start
diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 38ec22f4c0..a180df220e 100644
index 38ec22f4c03..a180df220e4 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn {
@@ -101,7 +101,7 @@ index 38ec22f4c0..a180df220e 100644
// Paper end - async tab completion
diff --git a/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java b/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
index 5f33c9e52a..e16ecdea7d 100644
index 5f33c9e52ac..e16ecdea7d2 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
@@ -0,0 +0,0 @@ import net.minecraft.server.CommandListenerWrapper;