1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

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

    25 import gc.testlibrary.PerfCounter;

    26 import gc.testlibrary.PerfCounters;

    27 

    28 

    29 /* @test TestGenerationPerfCounter

    30  * @bug 8080345

    31  * @requires vm.gc=="null"

    32  * @library /test/lib /

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

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

    35  *          java.compiler

    36  *          java.management/sun.management

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

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

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

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

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

    42  */

    43 public class TestGenerationPerfCounter {

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

    45         long numGenerations =

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

    47         assertEQ(numGenerations, 2L);

    48     }

    49 }