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test/java/lang/management/MemoryMXBean/CollectionUsageThreshold.java

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   1 /*
   2  * Copyright (c) 2003, 2013, 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  */


  49     private static final Map<String, PoolRecord> result = new HashMap<>();
  50     private static boolean trace = false;
  51     private static volatile int numMemoryPools = 1;
  52     private static final int NUM_GCS = 3;
  53     private static final int THRESHOLD = 10;
  54     private static volatile int numGCs = 0;
  55 
  56     // semaphore to signal the arrival of a low memory notification
  57     private static final Semaphore signals = new Semaphore(0);
  58     // barrier for the main thread to wait until the checker thread
  59     // finishes checking the low memory notification result
  60     private static final CyclicBarrier barrier = new CyclicBarrier(2);
  61 
  62     /**
  63      * Run the test multiple times with different GC versions.
  64      * First with default command line specified by the framework.
  65      * Then with GC versions specified by the test.
  66      */
  67     public static void main(String a[]) throws Throwable {
  68         final String main = "CollectionUsageThreshold$TestMain";
  69         RunUtil.runTestKeepGcOpts(main);
  70         RunUtil.runTestClearGcOpts(main, "-XX:+UseSerialGC");
  71         RunUtil.runTestClearGcOpts(main, "-XX:+UseParallelGC");
  72         RunUtil.runTestClearGcOpts(main, "-XX:+UseG1GC");
  73         RunUtil.runTestClearGcOpts(main, "-XX:+UseConcMarkSweepGC");


  74     }
  75 
  76     static class PoolRecord {
  77         private final MemoryPoolMXBean pool;
  78         private final AtomicInteger listenerInvoked = new AtomicInteger(0);
  79         private volatile long notifCount = 0;
  80         PoolRecord(MemoryPoolMXBean p) {
  81             this.pool = p;
  82         }
  83         int getListenerInvokedCount() {
  84             return listenerInvoked.get();
  85         }
  86         long getNotifCount() {
  87             return notifCount;
  88         }
  89         MemoryPoolMXBean getPool() {
  90             return pool;
  91         }
  92         void addNotification(MemoryNotificationInfo minfo) {
  93             listenerInvoked.incrementAndGet();


   1 /*
   2  * Copyright (c) 2003, 2014, 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  */


  49     private static final Map<String, PoolRecord> result = new HashMap<>();
  50     private static boolean trace = false;
  51     private static volatile int numMemoryPools = 1;
  52     private static final int NUM_GCS = 3;
  53     private static final int THRESHOLD = 10;
  54     private static volatile int numGCs = 0;
  55 
  56     // semaphore to signal the arrival of a low memory notification
  57     private static final Semaphore signals = new Semaphore(0);
  58     // barrier for the main thread to wait until the checker thread
  59     // finishes checking the low memory notification result
  60     private static final CyclicBarrier barrier = new CyclicBarrier(2);
  61 
  62     /**
  63      * Run the test multiple times with different GC versions.
  64      * First with default command line specified by the framework.
  65      * Then with GC versions specified by the test.
  66      */
  67     public static void main(String a[]) throws Throwable {
  68         final String main = "CollectionUsageThreshold$TestMain";
  69         String[] filterExplicitGCOptions = new String[]{"-XX:\\+ExplicitGCInvokesConcurrent"};
  70 
  71         RunUtil.runTestKeepGcOpts(filterExplicitGCOptions, main);
  72         RunUtil.runTestClearGcOpts(filterExplicitGCOptions, main, "-XX:+UseSerialGC");
  73         RunUtil.runTestClearGcOpts(filterExplicitGCOptions, main, "-XX:+UseParallelGC");
  74         RunUtil.runTestClearGcOpts(filterExplicitGCOptions, main, "-XX:+UseG1GC");
  75         RunUtil.runTestClearGcOpts(filterExplicitGCOptions, main, "-XX:+UseConcMarkSweepGC");
  76     }
  77 
  78     static class PoolRecord {
  79         private final MemoryPoolMXBean pool;
  80         private final AtomicInteger listenerInvoked = new AtomicInteger(0);
  81         private volatile long notifCount = 0;
  82         PoolRecord(MemoryPoolMXBean p) {
  83             this.pool = p;
  84         }
  85         int getListenerInvokedCount() {
  86             return listenerInvoked.get();
  87         }
  88         long getNotifCount() {
  89             return notifCount;
  90         }
  91         MemoryPoolMXBean getPool() {
  92             return pool;
  93         }
  94         void addNotification(MemoryNotificationInfo minfo) {
  95             listenerInvoked.incrementAndGet();


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