Zero1ThreadCountTest.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,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package org.openjdk.jmh.it.asymm;

import org.junit.Assert;
import org.junit.Test;
import org.openjdk.jmh.annotations.*;
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 Zero1ThreadCountTest {

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

    @TearDown
    public void check() {
        Assert.assertEquals(0, test1threads.size());
        if (Fixtures.expectStableThreads()) {
            Assert.assertEquals(2, test2threads.size());
        } else {
            Assert.assertTrue(test2threads.size() >= 2);
        }
    }

    @Benchmark
    @Group("test")
    @GroupThreads(0)
    public void test1() {
        test1threads.add(Thread.currentThread());
        Fixtures.work();
    }

    @Benchmark
    @Group("test")
    @GroupThreads(2)
    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();
        }
    }

}