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Remove slow and complex pipelining and make our own packet writing system. Speed glorious speed.

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By: md_5 <md_5@live.com.au>
This commit is contained in:
Spigot 2013-06-29 17:39:07 +10:00
parent 8aa5fe30e8
commit 9fec210eee
1 changed files with 103 additions and 104 deletions
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207
CraftBukkit-Patches/0025-Netty.patch
View file

@ -1,4 +1,4 @@
From ac55b7e35bf3f589fda99e820f8f0a8d9df866d1 Mon Sep 17 00:00:00 2001
From ed60ecd862c59f6f4117899e46cc30a635db3a95 Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Sun, 23 Jun 2013 16:32:51 +1000
Subject: [PATCH] Netty
@ -569,7 +569,7 @@ index 0000000..2eb1dcb
+}
diff --git a/src/main/java/org/spigotmc/netty/NettyNetworkManager.java b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
new file mode 100644
index 0000000..c4e1153
index 0000000..2db3ebb
--- /dev/null
+++ b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
@@ -0,0 +1,316 @@
@ -579,10 +579,8 @@ index 0000000..c4e1153
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.ChannelPromise;
+import io.netty.channel.MessageList;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import java.net.Socket;
+import java.net.SocketAddress;
+import java.security.PrivateKey;
@ -647,6 +645,7 @@ index 0000000..c4e1153
+ private Object[] dcArgs;
+ private Socket socketAdaptor;
+ private long writtenBytes;
+ private PacketWriter writer;
+
+ @Override
+ public void channelActive(ChannelHandlerContext ctx) throws Exception
@ -658,6 +657,7 @@ index 0000000..c4e1153
+ socketAdaptor = NettySocketAdaptor.adapt( (SocketChannel) channel );
+ // Followed by their first handler
+ connection = new PendingConnection( server, this );
+ writer = new PacketWriter();
+ // Finally register the connection
+ connected = true;
+ serverConnection.register( (PendingConnection) connection );
@ -666,6 +666,7 @@ index 0000000..c4e1153
+ @Override
+ public void channelInactive(ChannelHandlerContext ctx) throws Exception
+ {
+ writer.release();
+ a( "disconnect.endOfStream", new Object[ 0 ] );
+ }
+
@ -771,13 +772,12 @@ index 0000000..c4e1153
+ {
+ highPriorityQueue.add( packet );
+
+ ChannelPromise promise = channel.newPromise();
+ if ( packet instanceof Packet255KickDisconnect )
+ {
+ channel.pipeline().get( PacketEncoder.class ).lastFlush = 0;
+ writer.lastFlush = 0;
+ }
+
+ channel.write( packet, promise );
+ writer.write( channel, this, packet );
+ if ( packet instanceof Packet252KeyResponse )
+ {
+ Cipher encrypt = NettyServerConnection.getCipher( Cipher.ENCRYPT_MODE, secret );
@ -891,10 +891,10 @@ index 0000000..c4e1153
+}
diff --git a/src/main/java/org/spigotmc/netty/NettyServerConnection.java b/src/main/java/org/spigotmc/netty/NettyServerConnection.java
new file mode 100644
index 0000000..e00bc6a
index 0000000..1dfb36b
--- /dev/null
+++ b/src/main/java/org/spigotmc/netty/NettyServerConnection.java
@@ -0,0 +1,105 @@
@@ -0,0 +1,104 @@
+package org.spigotmc.netty;
+
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
@ -963,7 +963,6 @@ index 0000000..e00bc6a
+ ch.pipeline()
+ .addLast( "timer", new ReadTimeoutHandler( 30 ) )
+ .addLast( "decoder", new PacketDecoder() )
+ .addLast( "encoder", new PacketEncoder( networkManager ) )
+ .addLast( "manager", networkManager );
+ }
+ } ).childOption( ChannelOption.TCP_NODELAY, false ).group( group ).localAddress( host, port ).bind().syncUninterruptibly();
@ -1374,100 +1373,6 @@ index 0000000..3adc8d6
+ }
+ }
+}
diff --git a/src/main/java/org/spigotmc/netty/PacketEncoder.java b/src/main/java/org/spigotmc/netty/PacketEncoder.java
new file mode 100644
index 0000000..383fd46
--- /dev/null
+++ b/src/main/java/org/spigotmc/netty/PacketEncoder.java
@@ -0,0 +1,88 @@
+package org.spigotmc.netty;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufOutputStream;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelOutboundHandlerAdapter;
+import io.netty.channel.ChannelPromise;
+import io.netty.channel.MessageList;
+import java.io.DataOutputStream;
+import net.minecraft.server.Packet;
+import net.minecraft.server.PendingConnection;
+
+/**
+ * Netty encoder which takes a packet and encodes it, and adds a byte packet id
+ * header.
+ */
+public class PacketEncoder extends ChannelOutboundHandlerAdapter
+{
+
+ private static final int FLUSH_TIME = 1;
+ /*========================================================================*/
+ public long lastFlush;
+ private final NettyNetworkManager networkManager;
+ private final MessageList<Object> pending = MessageList.newInstance();
+
+ public PacketEncoder(NettyNetworkManager networkManager)
+ {
+ this.networkManager = networkManager;
+ }
+
+ @Override
+ public void write(ChannelHandlerContext ctx, MessageList<Object> msgs, ChannelPromise promise) throws Exception
+ {
+ // Append messages to queue and then recycle - we don't need to bother about recycling if the worst happens, since MessageList is GC safe
+ pending.add( msgs );
+ msgs.recycle();
+
+ // If we are not in the pending connect phase, and we have not reached our timer
+ if ( !( networkManager.connection instanceof PendingConnection ) && System.currentTimeMillis() - lastFlush < FLUSH_TIME )
+ {
+ return;
+ }
+ // Update our last write time
+ lastFlush = System.currentTimeMillis();
+
+ // Since we are writing in batches it can be useful to guess the size of our output to limit memcpy
+ int estimatedSize = 0;
+ for ( Object msg : pending )
+ {
+ if ( msg instanceof Packet )
+ {
+ estimatedSize += ( (Packet) msg ).a();
+ } else
+ {
+ throw new IllegalStateException( "Cannot send message of class " + msg.getClass() );
+ }
+ }
+ // Allocate an output buffer of estimated size
+ ByteBuf outBuf = ctx.alloc().buffer( estimatedSize );
+ // And a stream to which we can write this buffer to
+ DataOutputStream dataOut = new DataOutputStream( new ByteBufOutputStream( outBuf ) );
+
+ try
+ {
+ // Iterate through all packets, this is safe as we know we will only ever get packets in the pipeline
+ for ( Packet packet : (MessageList<Packet>) (MessageList) pending )
+ {
+ // Write packet ID
+ outBuf.writeByte( packet.n() );
+ // Write packet data
+ packet.a( dataOut );
+ }
+ // Add to the courtesy API providing number of written bytes
+ networkManager.addWrittenBytes( outBuf.readableBytes() );
+ // Write down our single ByteBuf
+ ctx.write( outBuf, promise );
+ } finally
+ {
+ // Reset packet queue
+ pending.clear();
+ // Since we are now in the event loop, the bytes have been written, we can free them if this was not the case
+ if ( outBuf.refCnt() != 0 )
+ {
+ outBuf.release();
+ }
+ }
+ }
+}
diff --git a/src/main/java/org/spigotmc/netty/PacketListener.java b/src/main/java/org/spigotmc/netty/PacketListener.java
new file mode 100644
index 0000000..965ba12
@ -1586,6 +1491,100 @@ index 0000000..965ba12
+ return packet;
+ }
+}
diff --git a/src/main/java/org/spigotmc/netty/PacketWriter.java b/src/main/java/org/spigotmc/netty/PacketWriter.java
new file mode 100644
index 0000000..f6fb958
--- /dev/null
+++ b/src/main/java/org/spigotmc/netty/PacketWriter.java
@@ -0,0 +1,88 @@
+package org.spigotmc.netty;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufOutputStream;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelOutboundHandlerAdapter;
+import io.netty.channel.ChannelPromise;
+import io.netty.channel.MessageList;
+import io.netty.handler.codec.EncoderException;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import net.minecraft.server.Packet;
+import net.minecraft.server.PendingConnection;
+
+/**
+ * Netty encoder which takes a packet and encodes it, and adds a byte packet id
+ * header.
+ */
+public class PacketWriter
+{
+
+ private static final int FLUSH_TIME = 1;
+ /*========================================================================*/
+ long lastFlush;
+ private final MessageList<Packet> pending = MessageList.newInstance();
+
+ void release()
+ {
+ pending.recycle();
+ }
+
+ void write(Channel channel, NettyNetworkManager networkManager, Packet msg)
+ {
+ // Append messages to queue
+ pending.add( msg );
+
+ // If we are not in the pending connect phase, and we have not reached our timer
+ if ( !( networkManager.connection instanceof PendingConnection ) && System.currentTimeMillis() - lastFlush < FLUSH_TIME )
+ {
+ return;
+ }
+ // Update our last write time
+ lastFlush = System.currentTimeMillis();
+
+ // Since we are writing in batches it can be useful to guess the size of our output to limit memcpy
+ int estimatedSize = 0;
+ for ( Packet packet : pending )
+ {
+ estimatedSize += packet.a();
+ }
+ // Allocate an output buffer of estimated size
+ ByteBuf outBuf = channel.alloc().buffer( estimatedSize );
+ // And a stream to which we can write this buffer to
+ DataOutputStream dataOut = new DataOutputStream( new ByteBufOutputStream( outBuf ) );
+
+ try
+ {
+ // Iterate through all packets, this is safe as we know we will only ever get packets in the pipeline
+ for ( Packet packet : pending )
+ {
+ // Write packet ID
+ outBuf.writeByte( packet.n() );
+ // Write packet data
+ try
+ {
+ packet.a( dataOut );
+ } catch ( IOException ex )
+ {
+ throw new EncoderException( ex );
+ }
+ }
+ // Add to the courtesy API providing number of written bytes
+ networkManager.addWrittenBytes( outBuf.readableBytes() );
+ // Write down our single ByteBuf
+ channel.write( outBuf );
+ } finally
+ {
+ // Reset packet queue
+ pending.clear();
+ // Since we are now in the event loop, the bytes have been written, we can free them if this was not the case
+ if ( outBuf.refCnt() != 0 )
+ {
+ outBuf.release();
+ }
+ }
+ }
+}
diff --git a/src/main/java/org/spigotmc/netty/ReadState.java b/src/main/java/org/spigotmc/netty/ReadState.java
new file mode 100644
index 0000000..d3a9cab