Mercurial > hg > truffle

annotate test/gc/6581734/Test6581734.java @ 2221:0aa3b4908911 jdk7-b131

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Merge
author cl
date Wed, 23 Feb 2011 15:48:46 -0800
parents 21c29458b334
children
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1703
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1 /*
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2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test Test6581734.java
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26 * @bug 6581734
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27 * @summary CMS Old Gen's collection usage is zero after GC which is incorrect
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28 * @run main/othervm -Xmx512m -verbose:gc -XX:+UseConcMarkSweepGC Test6581734
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29 *
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30 */
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31 import java.util.*;
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32 import java.lang.management.*;
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33
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34 // 6581734 states that memory pool usage via the mbean is wrong
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35 // for CMS (zero, even after a collection).
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36 //
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37 // 6580448 states that the collection count similarly is wrong
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38 // (stays at zero for CMS collections)
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39 // -- closed as dup of 6581734 as the same fix resolves both.
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40
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41
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42 public class Test6581734 {
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43
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44 private String poolName = "CMS";
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45 private String collectorName = "ConcurrentMarkSweep";
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46
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47 public static void main(String [] args) {
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48
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49 Test6581734 t = null;
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50 if (args.length==2) {
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51 t = new Test6581734(args[0], args[1]);
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52 } else {
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53 System.out.println("Defaulting to monitor CMS pool and collector.");
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54 t = new Test6581734();
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55 }
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56 t.run();
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57 }
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58
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59 public Test6581734(String pool, String collector) {
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60 poolName = pool;
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61 collectorName = collector;
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62 }
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63
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64 public Test6581734() {
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65 }
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66
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67 public void run() {
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68 // Use some memory, enough that we expect collections should
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69 // have happened.
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70 // Must run with options to ensure no stop the world full GC,
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71 // but e.g. at least one CMS cycle.
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72 allocationWork(300*1024*1024);
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73 System.out.println("Done allocationWork");
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74
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75 // Verify some non-zero results are stored.
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76 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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77 int poolsFound = 0;
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78 int poolsWithStats = 0;
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79 for (int i=0; i<pools.size(); i++) {
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80 MemoryPoolMXBean pool = pools.get(i);
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81 String name = pool.getName();
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82 System.out.println("found pool: " + name);
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83
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84 if (name.contains(poolName)) {
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85 long usage = pool.getCollectionUsage().getUsed();
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86 System.out.println(name + ": usage after GC = " + usage);
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87 poolsFound++;
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88 if (usage > 0) {
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89 poolsWithStats++;
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90 }
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91 }
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92 }
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93 if (poolsFound == 0) {
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94 throw new RuntimeException("No matching memory pools found: test with -XX:+UseConcMarkSweepGC");
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95 }
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96
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97 List<GarbageCollectorMXBean> collectors = ManagementFactory.getGarbageCollectorMXBeans();
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98 int collectorsFound = 0;
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99 int collectorsWithTime= 0;
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100 for (int i=0; i<collectors.size(); i++) {
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101 GarbageCollectorMXBean collector = collectors.get(i);
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102 String name = collector.getName();
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103 System.out.println("found collector: " + name);
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104 if (name.contains(collectorName)) {
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105 collectorsFound++;
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106 System.out.println(name + ": collection count = "
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107 + collector.getCollectionCount());
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108 System.out.println(name + ": collection time = "
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109 + collector.getCollectionTime());
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110 if (collector.getCollectionCount() <= 0) {
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111 throw new RuntimeException("collection count <= 0");
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112 }
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113 if (collector.getCollectionTime() > 0) {
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114 collectorsWithTime++;
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115 }
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116 }
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117 }
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118 // verify:
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119 if (poolsWithStats < poolsFound) {
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120 throw new RuntimeException("pools found with zero stats");
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121 }
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122
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123 if (collectorsWithTime<collectorsFound) {
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124 throw new RuntimeException("collectors found with zero time");
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125 }
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126 System.out.println("Test passed.");
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127 }
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128
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129 public void allocationWork(long target) {
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130
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131 long sizeAllocated = 0;
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132 List list = new LinkedList();
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133 long delay = 50;
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134 long count = 0;
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135
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136 while (sizeAllocated < target) {
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137 int size = 1024*1024;
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138 byte [] alloc = new byte[size];
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139 if (count % 2 == 0) {
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140 list.add(alloc);
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141 sizeAllocated+=size;
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142 System.out.print(".");
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143 }
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144 try { Thread.sleep(delay); } catch (InterruptedException ie) { }
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145 count++;
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146 }
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147 }
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148
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149 }