Test Long Adder openjdk jmh - Java Testing

Java examples for Testing:JDK jmh

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Description

Test Long Adder openjdk jmh

Demo Code



import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.LongAdder;


public class TestLongAdder {
    public static final int[] threadsCountArray = new int[] { 1, 2, 4, 8,
            16, 32, 48, 64 };//from   w ww  .j  a  v a2  s . c o  m

    @State(Scope.Benchmark)
    public static class LongAdderWrapper {
        public LongAdder value = new LongAdder();
    }

    @Benchmark
    @BenchmarkMode(Mode.SingleShotTime)
    @OutputTimeUnit(TimeUnit.MILLISECONDS)
    public Long incrementAtomicLoop(final LongAdderWrapper longAdderWrapper) {
        for (int i = 0; i < 1_000_000; i++) {
            longAdderWrapper.value.increment();
        }
        return longAdderWrapper.value.longValue();
    }

    public static void main(String[] args) throws RunnerException {
        for (final int threadsCount : threadsCountArray) {
            Options opt = new OptionsBuilder()
                    .include(TestLongAdder.class.getSimpleName())
                    .jvmArgs("-server", "-Xmx2G").warmupIterations(10)
                    .measurementIterations(25).forks(1)
                    .threads(threadsCount).build();
            new Runner(opt).run();
        }
    }
}

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