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Introduced an intermediary write buffer to reduce the contention

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This commit is contained in:
Trustin Lee 2008-09-26 08:31:33 +00:00
parent 0241120ace
commit 39086edae6
2 changed files with 28 additions and 9 deletions
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7
src/main/java/org/jboss/netty/channel/socket/nio/NioSocketChannel.java
View File

@ -25,7 +25,9 @@ package org.jboss.netty.channel.socket.nio;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.channels.SocketChannel;
import java.util.LinkedList;
import java.util.Queue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.atomic.AtomicBoolean;
@ -52,7 +54,10 @@ abstract class NioSocketChannel extends AbstractChannel
final AtomicBoolean writeTaskInTaskQueue = new AtomicBoolean();
final Runnable writeTask = new WriteTask();
final Queue<MessageEvent> writeBuffer = new LinkedBlockingQueue<MessageEvent>();
final BlockingQueue<MessageEvent> writeBuffer =
new LinkedBlockingQueue<MessageEvent>();
final Queue<MessageEvent> internalWriteBuffer =
new LinkedList<MessageEvent>();
MessageEvent currentWriteEvent;
int currentWriteIndex;

30
src/main/java/org/jboss/netty/channel/socket/nio/NioWorker.java
View File

@ -315,7 +315,6 @@ class NioWorker implements Runnable {
close(ch, ch.getSucceededFuture());
}
// FIXME I/O 스레드냐 아니냐에 따라서 task queue 에 안넣거나 넣거나 IoSocketHandler, IoSocketDispatcher
static void write(final NioSocketChannel channel, boolean mightNeedWakeup) {
if (mightNeedWakeup) {
NioWorker worker = channel.getWorker();
@ -359,15 +358,20 @@ class NioWorker implements Runnable {
boolean addOpWrite = false;
boolean removeOpWrite = false;
Queue<MessageEvent> internalWriteBuffer = channel.internalWriteBuffer;
MessageEvent evt;
ChannelBuffer buf;
int bufIdx;
synchronized (channel.writeBuffer) {
synchronized (internalWriteBuffer) {
if (internalWriteBuffer.isEmpty()) {
channel.writeBuffer.drainTo(internalWriteBuffer);
}
evt = channel.currentWriteEvent;
for (;;) {
if (evt == null) {
evt = channel.writeBuffer.poll();
evt = internalWriteBuffer.poll();
if (evt == null) {
channel.currentWriteEvent = null;
removeOpWrite = true;
@ -433,16 +437,21 @@ class NioWorker implements Runnable {
boolean addOpWrite = false;
boolean removeOpWrite = false;
int writtenBytes = 0;
Queue<MessageEvent> internalWriteBuffer = channel.internalWriteBuffer;
MessageEvent evt;
ChannelBuffer buf;
int bufIdx;
int writtenBytes = 0;
synchronized (internalWriteBuffer) {
if (internalWriteBuffer.isEmpty()) {
channel.writeBuffer.drainTo(internalWriteBuffer);
}
synchronized (channel.writeBuffer) {
evt = channel.currentWriteEvent;
for (;;) {
if (evt == null) {
evt = channel.writeBuffer.poll();
evt = internalWriteBuffer.poll();
if (evt == null) {
channel.currentWriteEvent = null;
removeOpWrite = true;
@ -677,7 +686,12 @@ class NioWorker implements Runnable {
}
// Clean up the stale messages in the write buffer.
synchronized (channel.writeBuffer) {
Queue<MessageEvent> internalWriteBuffer = channel.internalWriteBuffer;
synchronized (internalWriteBuffer) {
if (internalWriteBuffer.isEmpty()) {
channel.writeBuffer.drainTo(internalWriteBuffer);
}
MessageEvent evt = channel.currentWriteEvent;
if (evt != null) {
channel.currentWriteEvent = null;
@ -687,7 +701,7 @@ class NioWorker implements Runnable {
}
for (;;) {
evt = channel.writeBuffer.poll();
evt = internalWriteBuffer.poll();
if (evt == null) {
break;
}