PooledByteBufAllocatorAlignBenchmark.java — netty Source File

Source Code

/*
 * Copyright 2017 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
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.microbench.buffer;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.PooledByteBufAllocator;
import io.netty.microbench.util.AbstractMicrobenchmark;

import java.util.Random;
import java.util.concurrent.TimeUnit;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.OutputTimeUnit;
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.Warmup;

@State(Scope.Thread)
@Warmup(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS)
@Fork(5)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
public class PooledByteBufAllocatorAlignBenchmark extends
        AbstractMicrobenchmark {

    private static final Random rand = new Random();

    /**
     * Cache line power of 2.
     */
    private static final int CACHE_LINE_MAX = 256;

    /**
     * PRNG to walk the chunk randomly to avoid streaming reads.
     */
    private static final int OFFSET_ADD = CACHE_LINE_MAX * 1337;

    /**
     * Block of bytes to write/read. (Corresponds to int type)
     */
    private static final int BLOCK = 4;

// ... (102 more lines)