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annotate test/gc/g1/TestSummarizeRSetStats.java @ 10372:e72f7eecc96d

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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen Summary: Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary. Reviewed-by: johnc, jwilhelm
author tschatzl
date Tue, 28 May 2013 09:32:06 +0200
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children c319b188c7b2
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10372
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1 /*
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2 * Copyright (c) 2013, 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 TestSummarizeRSetStats.java
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26 * @bug 8013895
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27 * @library /testlibrary
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28 * @build TestSummarizeRSetStats
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29 * @summary Verify output of -XX:+G1SummarizeRSetStats
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30 * @run main TestSummarizeRSetStats
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31 *
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32 * Test the output of G1SummarizeRSetStats in conjunction with G1SummarizeRSetStatsPeriod.
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33 */
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34
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35 import com.oracle.java.testlibrary.*;
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36 import java.lang.Thread;
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37 import java.util.ArrayList;
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38 import java.util.Arrays;
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39
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40 class RunSystemGCs {
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41 // 4M size, both are directly allocated into the old gen
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42 static Object[] largeObject1 = new Object[1024 * 1024];
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43 static Object[] largeObject2 = new Object[1024 * 1024];
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44
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45 static int[] temp;
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46
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47 public static void main(String[] args) {
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48 // create some cross-references between these objects
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49 for (int i = 0; i < largeObject1.length; i++) {
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50 largeObject1[i] = largeObject2;
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51 }
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52
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53 for (int i = 0; i < largeObject2.length; i++) {
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54 largeObject2[i] = largeObject1;
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55 }
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56
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57 int numGCs = Integer.parseInt(args[0]);
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58
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59 if (numGCs > 0) {
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60 // try to force a minor collection: the young gen is 4M, the
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61 // amount of data allocated below is roughly that (4*1024*1024 +
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62 // some header data)
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63 for (int i = 0; i < 1024 ; i++) {
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64 temp = new int[1024];
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65 }
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66 }
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67
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68 for (int i = 0; i < numGCs - 1; i++) {
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69 System.gc();
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70 }
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71 }
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72 }
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73
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74 public class TestSummarizeRSetStats {
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75
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76 public static String runTest(String[] additionalArgs, int numGCs) throws Exception {
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77 ArrayList<String> finalargs = new ArrayList<String>();
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78 String[] defaultArgs = new String[] {
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79 "-XX:+UseG1GC",
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80 "-Xmn4m",
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81 "-Xmx20m",
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82 "-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking
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83 "-XX:+PrintGC",
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84 "-XX:+UnlockDiagnosticVMOptions",
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85 "-XX:G1HeapRegionSize=1M",
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86 };
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87
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88 finalargs.addAll(Arrays.asList(defaultArgs));
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89
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90 if (additionalArgs != null) {
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91 finalargs.addAll(Arrays.asList(additionalArgs));
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92 }
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93
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94 finalargs.add(RunSystemGCs.class.getName());
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95 finalargs.add(String.valueOf(numGCs));
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96
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97 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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98 finalargs.toArray(new String[0]));
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99 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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100
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101 output.shouldHaveExitValue(0);
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102
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103 String result = output.getStdout();
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104 return result;
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105 }
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106
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107 private static void expectStatistics(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
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108 int actualTotal = result.split("Concurrent RS processed").length - 1;
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109 int actualCumulative = result.split("Cumulative RS summary").length - 1;
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110
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111 if (expectedCumulative != actualCumulative) {
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112 throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative);
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113 }
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114
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115 if (expectedPeriodic != (actualTotal - actualCumulative)) {
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116 throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative));
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117 }
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118 }
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119
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120 public static void main(String[] args) throws Exception {
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121 String result;
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122
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123 // no RSet statistics output
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124 result = runTest(null, 0);
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125 expectStatistics(result, 0, 0);
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126
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127 // no RSet statistics output
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128 result = runTest(null, 2);
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129 expectStatistics(result, 0, 0);
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130
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131 // no RSet statistics output
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132 result = runTest(new String[] { "-XX:G1SummarizeRSetStatsPeriod=1" }, 3);
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133 expectStatistics(result, 0, 0);
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134
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135 // single RSet statistics output at the end
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136 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 0);
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137 expectStatistics(result, 1, 0);
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138
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139 // single RSet statistics output at the end
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140 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 2);
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141 expectStatistics(result, 1, 0);
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142
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143 // single RSet statistics output
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144 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 0);
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145 expectStatistics(result, 1, 0);
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146
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147 // two times RSet statistics output
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148 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 1);
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149 expectStatistics(result, 1, 1);
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150
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151 // four times RSet statistics output
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152 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 3);
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153 expectStatistics(result, 1, 3);
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154
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155 // three times RSet statistics output
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156 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=2" }, 3);
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157 expectStatistics(result, 1, 2);
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158
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159 // single RSet statistics output
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160 result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=100" }, 3);
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161 expectStatistics(result, 1, 1);
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162 }
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163 }
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164