Mercurial > hg > truffle
annotate test/gc/6581734/Test6581734.java @ 5495:c78cf0abfdff
Removed unused import.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Wed, 06 Jun 2012 17:20:07 +0200 |
parents | 21c29458b334 |
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rev | line source |
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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 } |