Zero2ThreadCountTest.java

/*
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.openjdk.jmh.it.asymm;

import org.junit.Assert;
import org.junit.Test;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Group;
import org.openjdk.jmh.annotations.GroupThreads;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.it.Fixtures;
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.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.All)
@Warmup(iterations = 0)
@Measurement(iterations = 5, time = 100, timeUnit = TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@Fork(1)
public class Zero2ThreadCountTest {

    private final Set<Thread> test1threads = Collections.synchronizedSet(new HashSet<>());
    private final Set<Thread> test2threads = Collections.synchronizedSet(new HashSet<>());

    @TearDown
    public void check() {
        if (Fixtures.expectStableThreads()) {
            Assert.assertEquals(1, test1threads.size());
        } else {
            Assert.assertTrue(test1threads.size() >= 1);
        }
        Assert.assertEquals(0, test2threads.size());
    }

    @Benchmark
    @Group("test")
    @GroupThreads(1)
    public void test1() {
        test1threads.add(Thread.currentThread());
        Fixtures.work();
    }

    @Benchmark
    @Group("test")
    @GroupThreads(0)
    public void test2() {
        test2threads.add(Thread.currentThread());
        Fixtures.work();
    }

    @Test
    public void invokeAPI() throws RunnerException {
        for (int c = 0; c < Fixtures.repetitionCount(); c++) {
            Options opt = new OptionsBuilder()
                    .include(Fixtures.getTestMask(this.getClass()) + ".*test")
                    .shouldFailOnError(true)
                    .build();
            new Runner(opt).run();
        }
    }

}