jdk8-mips64-public/hotspot: test/gc/6581734/Test6581734.java@7b4fb6089361 (annotated)

test/gc/6581734/Test6581734.java@7b4fb6089361 (annotated)

test/gc/6581734/Test6581734.java

Thu, 21 Apr 2011 19:49:49 -0700

author: trims
date: Thu, 21 Apr 2011 19:49:49 -0700
changeset 2771: 7b4fb6089361
parent 2111: 21c29458b334
child 6876: 710a3c8b516e
child 7785: f967da7f0c3c
permissions: -rw-r--r--

Added tag hs21-b09 for changeset 611e19a16519

 /*
  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * @test Test6581734.java
  * @bug 6581734
  * @summary CMS Old Gen's collection usage is zero after GC which is incorrect
  * @run main/othervm -Xmx512m -verbose:gc -XX:+UseConcMarkSweepGC Test6581734
  *
  */
 import java.util.*;
 import java.lang.management.*;
 // 6581734 states that memory pool usage via the mbean is wrong
 // for CMS (zero, even after a collection).
 //
 // 6580448 states that the collection count similarly is wrong
 // (stays at zero for CMS collections)
 // -- closed as dup of 6581734 as the same fix resolves both.
 public class Test6581734 {
     private String poolName = "CMS";
     private String collectorName = "ConcurrentMarkSweep";
     public static void main(String [] args) {
         Test6581734 t = null;
         if (args.length==2) {
             t = new Test6581734(args[0], args[1]);
         } else {
             System.out.println("Defaulting to monitor CMS pool and collector.");
             t = new Test6581734();
         }
         t.run();
     }
     public Test6581734(String pool, String collector) {
         poolName = pool;
         collectorName = collector;
     }
     public Test6581734() {
     }
     public void run() {
         // Use some memory, enough that we expect collections should
         // have happened.
         // Must run with options to ensure no stop the world full GC,
         // but e.g. at least one CMS cycle.
         allocationWork(300*1024*1024);
         System.out.println("Done allocationWork");
         // Verify some non-zero results are stored.
         List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
         int poolsFound = 0;
         int poolsWithStats = 0;
         for (int i=0; i<pools.size(); i++) {
             MemoryPoolMXBean pool = pools.get(i);
             String name = pool.getName();
             System.out.println("found pool: " + name);
             if (name.contains(poolName)) {
                 long usage = pool.getCollectionUsage().getUsed();
                 System.out.println(name + ": usage after GC = " + usage);
                 poolsFound++;
                 if (usage > 0) {
                     poolsWithStats++;
                 }
             }
         }
         if (poolsFound == 0) {
             throw new RuntimeException("No matching memory pools found: test with -XX:+UseConcMarkSweepGC");
         }
         List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
         int collectorsFound = 0;
         int collectorsWithTime= 0;
         for (int i=0; i<collectors.size(); i++) {
             GarbageCollectorMXBean collector = collectors.get(i);
             String name = collector.getName();
             System.out.println("found collector: " + name);
             if (name.contains(collectorName)) {
                 collectorsFound++;
                 System.out.println(name + ": collection count = "
                                    + collector.getCollectionCount());
                 System.out.println(name + ": collection time  = "
                                    + collector.getCollectionTime());
                 if (collector.getCollectionCount() <= 0) {
                     throw new RuntimeException("collection count <= 0");
                 }
                 if (collector.getCollectionTime() > 0) {
                     collectorsWithTime++;
                 }
             }
         }
         // verify:
         if (poolsWithStats < poolsFound) {
             throw new RuntimeException("pools found with zero stats");
         }
         if (collectorsWithTime<collectorsFound) {
             throw new RuntimeException("collectors found with zero time");
         }
         System.out.println("Test passed.");
     }
     public void allocationWork(long target) {
         long sizeAllocated = 0;
         List list = new LinkedList();
         long delay = 50;
         long count = 0;
         while (sizeAllocated < target) {
             int size = 1024*1024;
             byte [] alloc = new byte[size];
             if (count % 2 == 0) {
                 list.add(alloc);
                 sizeAllocated+=size;
                 System.out.print(".");
             }
             try { Thread.sleep(delay); } catch (InterruptedException ie) { }
             count++;
         }
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/gc/6581734/Test6581734.java@7b4fb6089361 (annotated)

test/gc/6581734/Test6581734.java