TlabTest.java

package com.opsian;

import org.openjdk.jmh.Main;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;
import org.openjdk.jmh.runner.options.OptionsBuilder;
import org.openjdk.jol.info.ClassLayout;
import com.opsian.*;

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

@State(Scope.Benchmark)
public class TlabTest {

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:-UseTLAB"})
    @Threads(1)
    public Object allocateWithoutTLABOneThreadObj() {
        return new Object();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:+UseTLAB"})
    @Threads(1)
    public Object allocateWithTLABOneThreadsObj() {
        return new Object();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:-UseTLAB"})
    @Threads(4)
    public Object allocateWithoutTLABFourThreadsObj() {
        return new Object();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:+UseTLAB"})
    @Threads(4)
    public Object allocateWithTLABFourThreadsObj() {
        return new Object();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:-UseTLAB"})
    @Threads(1)
    public Object allocateWithoutTLABOneThreadSmall() {
        return new SmallObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:+UseTLAB"})
    @Threads(1)
    public Object allocateWithTLABOneThreadsSmall() {
        return new SmallObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:-UseTLAB"})
    @Threads(4)
    public Object allocateWithoutTLABFourThreadsSmall() {
        return new SmallObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:+UseTLAB"})
    @Threads(4)
    public Object allocateWithTLABFourThreadsSmall() {
        return new SmallObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:-UseTLAB"})
    @Threads(1)
    public Object allocateWithoutTLABOneThreadLarge() {
        return new LargeObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:+UseTLAB"})
    @Threads(1)
    public Object allocateWithTLABOneThreadsLarge() {
        return new LargeObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:-UseTLAB"})
    @Threads(4)
    public Object allocateWithoutTLABFourThreadsLarge() {
        return new LargeObj();
    }

    @Benchmark
    @Fork(jvmArgsAppend = {"-XX:+UseParallelGC","-XX:+UseTLAB"})
    @Threads(4)
    public Object allocateWithTLABFourThreadsLarge() {
        return new LargeObj();
    }

    public static void main(String[] args) throws Exception {
        Main.main(args);
    }
}