/*

 * Copyright (c) 2017, 2019, 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.

 *

 * 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

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 */

package gc;

import static jdk.test.lib.Asserts.*;

import gc.testlibrary.PerfCounters;

/* @test TestGenerationPerfCounter

 * @bug 8080345

 * @requires vm.gc=="null"

 * @library /test/lib /

 * @summary Tests that the sun.gc.policy.generations returns 2 for all GCs.

 * @modules java.base/jdk.internal.misc

 *          java.compiler

 *          java.management/sun.management

 *          jdk.internal.jvmstat/sun.jvmstat.monitor

 * @run main/othervm -XX:+UsePerfData -XX:+UseSerialGC gc.TestGenerationPerfCounter

 * @run main/othervm -XX:+UsePerfData -XX:+UseParallelGC gc.TestGenerationPerfCounter

 * @run main/othervm -XX:+UsePerfData -XX:+UseG1GC gc.TestGenerationPerfCounter

 */

/* @test TestGenerationPerfCounterCMS

 * @bug 8080345

 * @comment Graal does not support CMS

 * @requires vm.gc=="null" & !vm.graal.enabled

 * @library /test/lib /

 * @summary Tests that the sun.gc.policy.generations returns 2 for all GCs.

 * @modules java.base/jdk.internal.misc

 *          java.compiler

 *          java.management/sun.management

 *          jdk.internal.jvmstat/sun.jvmstat.monitor

 * @run main/othervm -XX:+UsePerfData -XX:+UseConcMarkSweepGC gc.TestGenerationPerfCounter

 */

public class TestGenerationPerfCounter {

    public static void main(String[] args) throws Exception {

        long numGenerations =

            PerfCounters.findByName("sun.gc.policy.generations").longValue();

        assertEQ(numGenerations, 2L);

    }

}