io.netty.microbench.channel.DefaultChannelPipelineDuplexHandlerBenchmark Maven / Gradle / Ivy
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* Copyright 2022 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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package io.netty.microbench.channel;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.microbench.util.AbstractMicrobenchmark;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Threads;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.infra.Blackhole;
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 5, time = 1)
@State(Scope.Thread)
public class DefaultChannelPipelineDuplexHandlerBenchmark extends AbstractMicrobenchmark {
private ChannelPipeline pipeline;
private EmbeddedChannel channel;
@Param({"true", "false"})
private boolean duplex;
@Setup
public void setup() {
channel = new EmbeddedChannel() {
@Override
public void runPendingTasks() {
// NO-OP to reduce noise on flush
}
};
// disabling auto-read to reduce noise on flush
channel.config().setAutoRead(false);
pipeline = channel.pipeline();
pipeline.addLast(new ChannelInboundHandlerAdapter() {
@Override
public void channelReadComplete(final ChannelHandlerContext ctx) {
ctx.fireChannelReadComplete();
}
});
// Duplex handlers implements both out/in interfaces causing a scalability issue
// see https://bugs.openjdk.org/browse/JDK-8180450
if (duplex) {
pipeline.addLast(new ChannelDuplexHandler() {
@Override
public void channelReadComplete(final ChannelHandlerContext ctx) {
ctx.fireChannelReadComplete();
}
@Override
public void flush(final ChannelHandlerContext ctx) {
ctx.flush();
}
});
pipeline.addLast(new ChannelDuplexHandler() {
@Override
public void channelReadComplete(final ChannelHandlerContext ctx) {
ctx.flush();
}
});
} else {
pipeline.addLast(new ChannelInboundHandlerAdapter() {
@Override
public void channelReadComplete(final ChannelHandlerContext ctx) {
ctx.fireChannelReadComplete();
}
});
pipeline.addLast(new ChannelOutboundHandlerAdapter() {
@Override
public void flush(final ChannelHandlerContext ctx) {
ctx.flush();
}
});
pipeline.addLast(new ChannelInboundHandlerAdapter() {
@Override
public void channelReadComplete(final ChannelHandlerContext ctx) {
ctx.flush();
}
});
}
}
@TearDown
public void tearDown() {
pipeline.channel().close();
}
@Benchmark
public void propagateEvent(Blackhole hole) {
hole.consume(pipeline.fireChannelReadComplete());
}
@Benchmark
@Threads(4)
public void parallelPropagateEvent(Blackhole hole) {
hole.consume(pipeline.fireChannelReadComplete());
}
}