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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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10
Spigot-Server-Patches/Load-Chunks-for-Login-Asynchronously.patch
View File

@@ -5,7 +5,7 @@ Subject: [PATCH] Load Chunks for Login Asynchronously
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 324fd07bce..01330045c0 100644
index 324fd07bcee..01330045c0f 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -0,0 +0,0 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
@@ -18,7 +18,7 @@ index 324fd07bce..01330045c0 100644
public void setPositionRotation(BlockPosition blockposition, float f, float f1) {
diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index 45df816980..48bbaec4b6 100644
index 45df816980c..48bbaec4b64 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -0,0 +0,0 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
@@ -38,7 +38,7 @@ index 45df816980..48bbaec4b6 100644
// CraftBukkit end
public PlayerNaturallySpawnCreaturesEvent playerNaturallySpawnedEvent; // Paper
diff --git a/src/main/java/net/minecraft/server/LoginListener.java b/src/main/java/net/minecraft/server/LoginListener.java
index f1222fcb2b..28f48f2252 100644
index f1222fcb2bd..28f48f22522 100644
--- a/src/main/java/net/minecraft/server/LoginListener.java
+++ b/src/main/java/net/minecraft/server/LoginListener.java
@@ -0,0 +0,0 @@ public class LoginListener implements PacketLoginInListener {
@@ -60,7 +60,7 @@ index f1222fcb2b..28f48f2252 100644
if (entityplayer != null) {
this.g = LoginListener.EnumProtocolState.DELAY_ACCEPT;
diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 2e81f3a1d9..8800a8fcf9 100644
index 2e81f3a1d93..8800a8fcf9a 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 {
@@ -90,7 +90,7 @@ index 2e81f3a1d9..8800a8fcf9 100644
this.player.lastX = this.player.locX();
this.player.lastY = this.player.locY();
diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
index ec45c30dd3..edf9df8c8a 100644
index 6a4e4f93eb3..61c7f5f9528 100644
--- a/src/main/java/net/minecraft/server/PlayerList.java
+++ b/src/main/java/net/minecraft/server/PlayerList.java
@@ -0,0 +0,0 @@ public abstract class PlayerList {