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annotate test/gc/class_unloading/TestG1ClassUnloadingHWM.java @ 20524:85f4c4ecc963

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8058475: TestCMSClassUnloadingEnabledHWM.java fails with '.*CMS Initial Mark.*' missing from stdout/stderr Reviewed-by: mgerdin, tschatzl, brutisso
author stefank
date Tue, 16 Sep 2014 10:13:45 +0200
parents 8a7429682242
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2014, 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
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26 * @key gc
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27 * @bug 8049831
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28 * @library /testlibrary /testlibrary/whitebox
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29 * @build TestG1ClassUnloadingHWM
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30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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31 * @run driver TestG1ClassUnloadingHWM
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32 * @summary Test that -XX:-ClassUnloadingWithConcurrentMark will trigger a Full GC when more than MetaspaceSize metadata is allocated.
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33 */
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34
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35 import com.oracle.java.testlibrary.OutputAnalyzer;
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36 import com.oracle.java.testlibrary.ProcessTools;
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37 import java.util.ArrayList;
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38 import java.util.Arrays;
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39 import sun.hotspot.WhiteBox;
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40
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41 public class TestG1ClassUnloadingHWM {
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42 private static long MetaspaceSize = 32 * 1024 * 1024;
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43 private static long YoungGenSize = 32 * 1024 * 1024;
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44
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45 private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
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46 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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47 "-Xbootclasspath/a:.",
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48 "-XX:+UnlockDiagnosticVMOptions",
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49 "-XX:+WhiteBoxAPI",
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50 "-XX:MetaspaceSize=" + MetaspaceSize,
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51 "-Xmn" + YoungGenSize,
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52 "-XX:+UseG1GC",
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53 "-XX:" + (enableUnloading ? "+" : "-") + "ClassUnloadingWithConcurrentMark",
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54 "-XX:+PrintHeapAtGC",
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55 "-XX:+PrintGCDetails",
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56 TestG1ClassUnloadingHWM.AllocateBeyondMetaspaceSize.class.getName(),
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57 "" + MetaspaceSize,
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58 "" + YoungGenSize);
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59 return new OutputAnalyzer(pb.start());
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60 }
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61
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62 public static OutputAnalyzer runWithG1ClassUnloading() throws Exception {
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63 return run(true);
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64 }
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65
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66 public static OutputAnalyzer runWithoutG1ClassUnloading() throws Exception {
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67 return run(false);
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68 }
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69
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70 public static void testWithoutG1ClassUnloading() throws Exception {
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71 // -XX:-ClassUnloadingWithConcurrentMark is used, so we expect a full GC instead of a concurrent cycle.
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72 OutputAnalyzer out = runWithoutG1ClassUnloading();
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73
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74 out.shouldMatch(".*Full GC.*");
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75 out.shouldNotMatch(".*initial-mark.*");
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76 }
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77
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78 public static void testWithG1ClassUnloading() throws Exception {
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79 // -XX:+ClassUnloadingWithConcurrentMark is used, so we expect a concurrent cycle instead of a full GC.
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80 OutputAnalyzer out = runWithG1ClassUnloading();
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81
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82 out.shouldMatch(".*initial-mark.*");
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83 out.shouldNotMatch(".*Full GC.*");
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84 }
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85
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86 public static void main(String args[]) throws Exception {
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87 testWithG1ClassUnloading();
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88 testWithoutG1ClassUnloading();
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89 }
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90
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91 public static class AllocateBeyondMetaspaceSize {
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92 public static Object dummy;
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93
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94 public static void main(String [] args) throws Exception {
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95 if (args.length != 2) {
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96 throw new IllegalArgumentException("Usage: <MetaspaceSize> <YoungGenSize>");
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97 }
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98
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99 WhiteBox wb = WhiteBox.getWhiteBox();
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100
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101 // Allocate past the MetaspaceSize limit
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102 long metaspaceSize = Long.parseLong(args[0]);
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103 long allocationBeyondMetaspaceSize = metaspaceSize * 2;
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104 long metaspace = wb.allocateMetaspace(null, allocationBeyondMetaspaceSize);
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105
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106 long youngGenSize = Long.parseLong(args[1]);
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107 triggerYoungGCs(youngGenSize);
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108
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109 wb.freeMetaspace(null, metaspace, metaspace);
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110 }
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111
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112 public static void triggerYoungGCs(long youngGenSize) {
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113 long approxAllocSize = 32 * 1024;
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114 long numAllocations = 2 * youngGenSize / approxAllocSize;
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115
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116 for (long i = 0; i < numAllocations; i++) {
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117 dummy = new byte[(int)approxAllocSize];
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118 }
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119 }
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120 }
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121 }
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122