1 /*
   2  * Copyright (c) 2017, 2019, 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 package gc;
  25 
  26 import static jdk.test.lib.Asserts.*;
  27 import gc.testlibrary.PerfCounters;
  28 
  29 
  30 /* @test TestGenerationPerfCounter
  31  * @bug 8080345
  32  * @requires vm.gc=="null"
  33  * @library /test/lib /
  34  * @summary Tests that the sun.gc.policy.generations returns 2 for all GCs.
  35  * @modules java.base/jdk.internal.misc
  36  *          java.compiler
  37  *          java.management/sun.management
  38  *          jdk.internal.jvmstat/sun.jvmstat.monitor
  39  * @run main/othervm -XX:+UsePerfData -XX:+UseSerialGC gc.TestGenerationPerfCounter
  40  * @run main/othervm -XX:+UsePerfData -XX:+UseParallelGC gc.TestGenerationPerfCounter
  41  * @run main/othervm -XX:+UsePerfData -XX:+UseG1GC gc.TestGenerationPerfCounter
  42  */
  43 
  44 /* @test TestGenerationPerfCounterCMS
  45  * @bug 8080345
  46  * @comment Graal does not support CMS
  47  * @requires vm.gc=="null" & !vm.graal.enabled
  48  * @library /test/lib /
  49  * @summary Tests that the sun.gc.policy.generations returns 2 for all GCs.
  50  * @modules java.base/jdk.internal.misc
  51  *          java.compiler
  52  *          java.management/sun.management
  53  *          jdk.internal.jvmstat/sun.jvmstat.monitor
  54  * @run main/othervm -XX:+UsePerfData -XX:+UseConcMarkSweepGC gc.TestGenerationPerfCounter
  55  */
  56 
  57 public class TestGenerationPerfCounter {
  58     public static void main(String[] args) throws Exception {
  59         long numGenerations =
  60             PerfCounters.findByName("sun.gc.policy.generations").longValue();
  61         assertEQ(numGenerations, 2L);
  62     }
  63 }