rev 12309 : Rev 01

   1 /*
   2  * Copyright (c) 2015, 2016, 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 utils.*;
  25 
  26 /*
  27  * @test
  28  * @summary Test checks the consistency of the output
  29  * displayed with jstat -gccapacity.
  30  * @modules java.base/jdk.internal.misc
  31  * @library /test/lib
  32  * @library ../share
  33  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  34  * @run main/othervm -XX:+UsePerfData -Xmx128M GcCapacityTest
  35  */
  36 public class GcCapacityTest {
  37 
  38     public static void main(String[] args) throws Exception {
  39 
  40         // We will be running "jstat -gc" tool
  41         JstatGcCapacityTool jstatGcTool = new JstatGcCapacityTool(ProcessHandle.current().getPid());
  42 
  43         // Run once and get the  results asserting that they are reasonable
  44         JstatGcCapacityResults measurement1 = jstatGcTool.measure();
  45         measurement1.assertConsistency();
  46 
  47         // Provoke a gc and verify the changed values
  48         GcProvoker gcProvoker = new GcProvoker();
  49         gcProvoker.provokeGc();
  50         JstatGcCapacityResults measurement2 = jstatGcTool.measure();
  51         measurement2.assertConsistency();
  52 
  53         // Assert that the GC events count has increased
  54         JstatResults.assertGCEventsIncreased(measurement1, measurement2);
  55 
  56         // Provoke a gc again and verify the changed values
  57         gcProvoker.provokeGc();
  58         JstatGcCapacityResults measurement3 = jstatGcTool.measure();
  59         measurement3.assertConsistency();
  60 
  61         // Assert that the GC events count has increased
  62         JstatResults.assertGCEventsIncreased(measurement1, measurement2);
  63     }
  64 
  65 }
--- EOF ---