1 /*
   2  * Copyright (c) 2011, 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 /**
  25  * @test TestFullGCCount.java
  26  * @bug 7072527
  27  * @summary CMS: JMM GC counters overcount in some cases
  28  * @requires !(vm.gc.ConcMarkSweep & vm.opt.ExplicitGCInvokesConcurrent == true)


  29  * @modules java.management
  30  * @run main/othervm -Xlog:gc TestFullGCCount
  31  */
  32 
  33 import java.lang.management.GarbageCollectorMXBean;
  34 import java.lang.management.ManagementFactory;
  35 import java.util.ArrayList;
  36 import java.util.HashMap;
  37 import java.util.List;
  38 
  39 /*
  40  * Originally for a specific failure in CMS, this test now monitors all
  41  * collectors for double-counting of collections.
  42  */
  43 public class TestFullGCCount {
  44 
  45     static List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
  46 
  47     public static void main(String[] args) {
  48         int iterations = 20;

   1 /*
   2  * Copyright (c) 2011, 2018, 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 /**
  25  * @test TestFullGCCount.java
  26  * @bug 7072527
  27  * @summary CMS: JMM GC counters overcount in some cases
  28  * @requires !(vm.gc == "ConcMarkSweep" & vm.opt.ExplicitGCInvokesConcurrent == true)
  29  * @comment Shenandoah has "ExplicitGCInvokesConcurrent" on by default
  30  * @requires !(vm.gc == "Shenandoah"    & vm.opt.ExplicitGCInvokesConcurrent != false)
  31  * @modules java.management
  32  * @run main/othervm -Xlog:gc TestFullGCCount
  33  */
  34 
  35 import java.lang.management.GarbageCollectorMXBean;
  36 import java.lang.management.ManagementFactory;
  37 import java.util.ArrayList;
  38 import java.util.HashMap;
  39 import java.util.List;
  40 
  41 /*
  42  * Originally for a specific failure in CMS, this test now monitors all
  43  * collectors for double-counting of collections.
  44  */
  45 public class TestFullGCCount {
  46 
  47     static List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
  48 
  49     public static void main(String[] args) {
  50         int iterations = 20;