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annotate test/gc/g1/TestG1TraceEagerReclaimHumongousObjects.java @ 24234:ea6f94ab283b default tip

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Added tag jvmci-0.36 for changeset 8128b98d4736
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Mon, 18 Sep 2017 18:49:45 +0200
parents cbc7c4c9e11c
children
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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 TestG1TraceEagerReclaimHumongousObjects
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26 * @bug 8058801 8048179
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27 * @summary Ensure that the output for a G1TraceEagerReclaimHumongousObjects
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28 * includes the expected necessary messages.
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29 * @key gc
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30 * @library /testlibrary
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31 */
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32
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33 import com.oracle.java.testlibrary.ProcessTools;
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34 import com.oracle.java.testlibrary.OutputAnalyzer;
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35 import java.util.LinkedList;
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36
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37 public class TestG1TraceEagerReclaimHumongousObjects {
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38 public static void main(String[] args) throws Exception {
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39 testGCLogs();
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40 testHumongousObjectGCLogs();
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41 }
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42
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43 private static void testGCLogs() throws Exception {
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44
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45 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
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46 "-Xms128M",
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47 "-Xmx128M",
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48 "-Xmn16M",
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49 "-XX:G1HeapRegionSize=1M",
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50 "-XX:+PrintGC",
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51 "-XX:+UnlockExperimentalVMOptions",
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52 "-XX:G1LogLevel=finest",
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53 "-XX:+G1TraceEagerReclaimHumongousObjects",
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54 GCTest.class.getName());
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55
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56 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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57
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58 // As G1EagerReclaimHumongousObjects is set(default), below logs should be displayed.
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59 // And GCTest doesn't have humongous objects, so values should be zero.
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60 output.shouldContain("[Humongous Reclaim");
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61 output.shouldContain("[Humongous Total: 0]");
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62 output.shouldContain("[Humongous Candidate: 0]");
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63 output.shouldContain("[Humongous Reclaimed: 0]");
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64
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65 output.shouldHaveExitValue(0);
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66 }
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67
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68 private static void testHumongousObjectGCLogs() throws Exception {
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69 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
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70 "-Xms128M",
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71 "-Xmx128M",
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72 "-Xmn16M",
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73 "-XX:G1HeapRegionSize=1M",
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74 "-XX:+PrintGC",
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75 "-XX:+UnlockExperimentalVMOptions",
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76 "-XX:G1LogLevel=finest",
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77 "-XX:+G1TraceEagerReclaimHumongousObjects",
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78 GCWithHumongousObjectTest.class.getName());
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79
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80 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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81
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82 // As G1ReclaimDeadHumongousObjectsAtYoungGC is set(default), below logs should be displayed.
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83 output.shouldContain("[Humongous Reclaim");
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84 output.shouldContain("[Humongous Total");
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85 output.shouldContain("[Humongous Candidate");
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86 output.shouldContain("[Humongous Reclaimed");
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87
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88 // As G1TraceReclaimDeadHumongousObjectsAtYoungGC is set and GCWithHumongousObjectTest has humongous objects,
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89 // these logs should be displayed.
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90 output.shouldContain("Live humongous");
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91 output.shouldContain("Dead humongous region");
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92 output.shouldHaveExitValue(0);
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93 }
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94
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95 static class GCTest {
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96 private static byte[] garbage;
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97
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98 public static void main(String [] args) {
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99 System.out.println("Creating garbage");
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100 // create 128MB of garbage. This should result in at least one GC
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101 for (int i = 0; i < 1024; i++) {
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102 garbage = new byte[128 * 1024];
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103 }
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104 System.out.println("Done");
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105 }
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106 }
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107
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108 static class GCWithHumongousObjectTest {
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109
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110 public static final int M = 1024*1024;
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111 public static LinkedList<Object> garbageList = new LinkedList<Object>();
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112 // A large object referenced by a static.
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113 static int[] filler = new int[10 * M];
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114
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115 public static void genGarbage() {
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116 for (int i = 0; i < 32*1024; i++) {
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117 garbageList.add(new int[100]);
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118 }
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119 garbageList.clear();
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120 }
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121
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122 public static void main(String[] args) {
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123
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124 int[] large = new int[M];
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125 Object ref = large;
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126
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127 System.out.println("Creating garbage");
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128 for (int i = 0; i < 100; i++) {
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129 // A large object that will be reclaimed eagerly.
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130 large = new int[6*M];
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131 genGarbage();
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132 // Make sure that the compiler cannot completely remove
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133 // the allocation of the large object until here.
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134 System.out.println(large);
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135 }
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136
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137 // Keep the reference to the first object alive.
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138 System.out.println(ref);
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139 System.out.println("Done");
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140 }
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141 }
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142 }