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annotate test/gc/survivorAlignment/SurvivorAlignmentTestMain.java @ 21516:fe4a77bec5b7

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Use GraalRuntime::parse_lines in GraalRuntime::parse_graal_options_file
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Thu, 07 May 2015 16:59:34 +0200
parents 4b7c96fba3d8
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 import java.lang.management.ManagementFactory;
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25 import java.lang.management.MemoryPoolMXBean;
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26 import java.util.Objects;
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27 import java.util.Optional;
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28 import java.util.regex.Matcher;
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29 import java.util.regex.Pattern;
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30
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31 import com.oracle.java.testlibrary.Asserts;
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32 import com.sun.management.ThreadMXBean;
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33 import sun.hotspot.WhiteBox;
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34 import sun.misc.Unsafe;
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35
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36 /**
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37 * Main class for tests on {@code SurvivorAlignmentInBytes} option.
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38 *
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39 * Typical usage is to obtain instance using fromArgs method, allocate objects
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40 * and verify that actual memory usage in tested heap space is close to
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41 * expected.
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42 */
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43 public class SurvivorAlignmentTestMain {
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44 enum HeapSpace {
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45 EDEN,
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46 SURVIVOR,
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47 TENURED
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48 }
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49
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50 public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
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51
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52 public static final long MAX_TENURING_THRESHOLD = Optional.ofNullable(
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53 SurvivorAlignmentTestMain.WHITE_BOX.getIntxVMFlag(
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54 "MaxTenuringThreshold")).orElse(15L);
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55
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56 /**
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57 * Regexp used to parse memory size params, like 2G, 34m or 15k.
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58 */
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59 private static final Pattern SIZE_REGEX
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60 = Pattern.compile("(?<size>[0-9]+)(?<multiplier>[GMKgmk])?");
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61
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62 // Names of different heap spaces.
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63 private static final String DEF_NEW_EDEN = "Eden Space";
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64 private static final String DEF_NEW_SURVIVOR = "Survivor Space";
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65 private static final String PAR_NEW_EDEN = "Par Eden Space";
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66 private static final String PAR_NEW_SURVIVOR = "Par Survivor Space";
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67 private static final String PS_EDEN = "PS Eden Space";
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68 private static final String PS_SURVIVOR = "PS Survivor Space";
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69 private static final String G1_EDEN = "G1 Eden Space";
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70 private static final String G1_SURVIVOR = "G1 Survivor Space";
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71 private static final String SERIAL_TENURED = "Tenured Gen";
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72 private static final String CMS_TENURED = "CMS Old Gen";
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73 private static final String PS_TENURED = "PS Old Gen";
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74 private static final String G1_TENURED = "G1 Old Gen";
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75
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76 private static final long G1_HEAP_REGION_SIZE = Optional.ofNullable(
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77 SurvivorAlignmentTestMain.WHITE_BOX.getUintxVMFlag(
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78 "G1HeapRegionSize")).orElse(-1L);
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79
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80 /**
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81 * Min size of free chunk in CMS generation.
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82 * An object allocated in CMS generation will at least occupy this amount
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83 * of bytes.
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84 */
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85 private static final long CMS_MIN_FREE_CHUNK_SIZE
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86 = 3L * Unsafe.ADDRESS_SIZE;
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87
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88 private static final AlignmentHelper EDEN_SPACE_HELPER;
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89 private static final AlignmentHelper SURVIVOR_SPACE_HELPER;
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90 private static final AlignmentHelper TENURED_SPACE_HELPER;
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91 /**
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92 * Amount of memory that should be filled during a test run.
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93 */
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94 private final long memoryToFill;
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95 /**
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96 * The size of an objects that will be allocated during a test run.
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97 */
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98 private final long objectSize;
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99 /**
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100 * Amount of memory that will be actually occupied by an object in eden
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101 * space.
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102 */
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103 private final long actualObjectSize;
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104 /**
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105 * Storage for allocated objects.
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106 */
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107 private final Object[] garbage;
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108 /**
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109 * Heap space whose memory usage is a subject of assertions during the test
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110 * run.
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111 */
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112 private final HeapSpace testedSpace;
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113
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114 private long[] baselinedThreadMemoryUsage = null;
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115 private long[] threadIds = null;
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116
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117 /**
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118 * Initialize {@code EDEN_SPACE_HELPER}, {@code SURVIVOR_SPACE_HELPER} and
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119 * {@code TENURED_SPACE_HELPER} to represent heap spaces in use.
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120 *
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121 * Note that regardless to GC object's alignment in survivor space is
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122 * expected to be equal to {@code SurvivorAlignmentInBytes} value and
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123 * alignment in other spaces is expected to be equal to
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124 * {@code ObjectAlignmentInBytes} value.
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125 *
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126 * In CMS generation we can't allocate less then {@code MinFreeChunk} value,
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127 * for other CGs we expect that object of size {@code MIN_OBJECT_SIZE}
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128 * could be allocated as it is (of course, its size could be aligned
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129 * according to alignment value used in a particular space).
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130 *
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131 * For G1 GC MXBeans could report memory usage only with region size
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132 * precision (if an object allocated in some G1 heap region, then all region
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133 * will claimed as used), so for G1's spaces precision is equal to
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134 * {@code G1HeapRegionSize} value.
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135 */
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136 static {
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137 AlignmentHelper edenHelper = null;
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138 AlignmentHelper survivorHelper = null;
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139 AlignmentHelper tenuredHelper = null;
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140 for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
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141 switch (pool.getName()) {
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142 case SurvivorAlignmentTestMain.DEF_NEW_EDEN:
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143 case SurvivorAlignmentTestMain.PAR_NEW_EDEN:
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144 case SurvivorAlignmentTestMain.PS_EDEN:
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145 Asserts.assertNull(edenHelper,
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146 "Only one bean for eden space is expected.");
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147 edenHelper = new AlignmentHelper(
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148 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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149 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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150 AlignmentHelper.MIN_OBJECT_SIZE, pool);
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151 break;
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152 case SurvivorAlignmentTestMain.G1_EDEN:
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153 Asserts.assertNull(edenHelper,
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154 "Only one bean for eden space is expected.");
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155 edenHelper = new AlignmentHelper(
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156 SurvivorAlignmentTestMain.G1_HEAP_REGION_SIZE,
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157 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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158 AlignmentHelper.MIN_OBJECT_SIZE, pool);
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159 break;
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160 case SurvivorAlignmentTestMain.DEF_NEW_SURVIVOR:
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161 case SurvivorAlignmentTestMain.PAR_NEW_SURVIVOR:
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162 case SurvivorAlignmentTestMain.PS_SURVIVOR:
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163 Asserts.assertNull(survivorHelper,
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164 "Only one bean for survivor space is expected.");
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165 survivorHelper = new AlignmentHelper(
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166 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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167 AlignmentHelper.SURVIVOR_ALIGNMENT_IN_BYTES,
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168 AlignmentHelper.MIN_OBJECT_SIZE, pool);
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169 break;
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170 case SurvivorAlignmentTestMain.G1_SURVIVOR:
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171 Asserts.assertNull(survivorHelper,
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172 "Only one bean for survivor space is expected.");
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173 survivorHelper = new AlignmentHelper(
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174 SurvivorAlignmentTestMain.G1_HEAP_REGION_SIZE,
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175 AlignmentHelper.SURVIVOR_ALIGNMENT_IN_BYTES,
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176 AlignmentHelper.MIN_OBJECT_SIZE, pool);
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177 break;
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178 case SurvivorAlignmentTestMain.SERIAL_TENURED:
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179 case SurvivorAlignmentTestMain.PS_TENURED:
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180 case SurvivorAlignmentTestMain.G1_TENURED:
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181 Asserts.assertNull(tenuredHelper,
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182 "Only one bean for tenured space is expected.");
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183 tenuredHelper = new AlignmentHelper(
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184 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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185 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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186 AlignmentHelper.MIN_OBJECT_SIZE, pool);
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187 break;
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188 case SurvivorAlignmentTestMain.CMS_TENURED:
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189 Asserts.assertNull(tenuredHelper,
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190 "Only one bean for tenured space is expected.");
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191 tenuredHelper = new AlignmentHelper(
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192 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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193 AlignmentHelper.OBJECT_ALIGNMENT_IN_BYTES,
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194 SurvivorAlignmentTestMain.CMS_MIN_FREE_CHUNK_SIZE,
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195 pool);
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196 break;
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197 }
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198 }
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199 EDEN_SPACE_HELPER = Objects.requireNonNull(edenHelper,
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200 "AlignmentHelper for eden space should be initialized.");
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201 SURVIVOR_SPACE_HELPER = Objects.requireNonNull(survivorHelper,
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202 "AlignmentHelper for survivor space should be initialized.");
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203 TENURED_SPACE_HELPER = Objects.requireNonNull(tenuredHelper,
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204 "AlignmentHelper for tenured space should be initialized.");
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205 }
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206 /**
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207 * Returns an SurvivorAlignmentTestMain instance constructed using CLI
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208 * options.
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209 *
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210 * Following options are expected:
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211 * <ul>
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212 * <li>memoryToFill</li>
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213 * <li>objectSize</li>
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214 * </ul>
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215 *
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216 * Both argument may contain multiplier suffix k, m or g.
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217 */
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218 public static SurvivorAlignmentTestMain fromArgs(String[] args) {
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219 Asserts.assertEQ(args.length, 3, "Expected three arguments: "
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220 + "memory size, object size and tested heap space name.");
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221
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222 long memoryToFill = parseSize(args[0]);
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223 long objectSize = Math.max(parseSize(args[1]),
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224 AlignmentHelper.MIN_ARRAY_SIZE);
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225 HeapSpace testedSpace = HeapSpace.valueOf(args[2]);
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226
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227 return new SurvivorAlignmentTestMain(memoryToFill, objectSize,
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228 testedSpace);
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229 }
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230
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231 /**
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232 * Returns a value parsed from a string with format
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233 * &lt;integer&gt;&lt;multiplier&gt;.
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234 */
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235 private static long parseSize(String sizeString) {
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236 Matcher matcher = SIZE_REGEX.matcher(sizeString);
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237 Asserts.assertTrue(matcher.matches(),
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238 "sizeString should have following format \"[0-9]+([MBK])?\"");
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239 long size = Long.valueOf(matcher.group("size"));
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240
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241 if (matcher.group("multiplier") != null) {
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242 long K = 1024L;
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243 // fall through multipliers
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244 switch (matcher.group("multiplier").toLowerCase()) {
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245 case "g":
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246 size *= K;
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247 case "m":
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248 size *= K;
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249 case "k":
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250 size *= K;
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251 }
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252 }
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253 return size;
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254 }
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255
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256 private SurvivorAlignmentTestMain(long memoryToFill, long objectSize,
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257 HeapSpace testedSpace) {
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258 this.objectSize = objectSize;
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259 this.memoryToFill = memoryToFill;
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260 this.testedSpace = testedSpace;
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261
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262 AlignmentHelper helper = SurvivorAlignmentTestMain.EDEN_SPACE_HELPER;
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263
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264 this.actualObjectSize = helper.getObjectSizeInThisSpace(
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265 this.objectSize);
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266 int arrayLength = helper.getObjectsCount(memoryToFill, this.objectSize);
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267 garbage = new Object[arrayLength];
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268 }
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269
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270 /**
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271 * Allocate byte arrays to fill {@code memoryToFill} memory.
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272 */
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273 public void allocate() {
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274 int byteArrayLength = Math.max((int) (objectSize
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275 - Unsafe.ARRAY_BYTE_BASE_OFFSET), 0);
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276
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277 for (int i = 0; i < garbage.length; i++) {
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278 garbage[i] = new byte[byteArrayLength];
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279 }
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280 }
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281
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282 /**
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283 * Release memory occupied after {@code allocate} call.
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284 */
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285 public void release() {
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286 for (int i = 0; i < garbage.length; i++) {
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287 garbage[i] = null;
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288 }
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289 }
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290
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291 /**
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292 * Returns expected amount of memory occupied in a {@code heapSpace} by
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293 * objects referenced from {@code garbage} array.
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294 */
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295 public long getExpectedMemoryUsage() {
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296 AlignmentHelper alignmentHelper = getAlignmentHelper(testedSpace);
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297 return alignmentHelper.getExpectedMemoryUsage(objectSize,
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298 garbage.length);
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299 }
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300
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301 /**
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302 * Verifies that memory usage in a {@code heapSpace} deviates from
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303 * {@code expectedUsage} for no more than {@code MAX_RELATIVE_DEVIATION}.
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304 */
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305 public void verifyMemoryUsage(long expectedUsage) {
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306 AlignmentHelper alignmentHelper = getAlignmentHelper(testedSpace);
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307
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308 long actualMemoryUsage = alignmentHelper.getActualMemoryUsage();
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309 boolean otherThreadsAllocatedMemory = areOtherThreadsAllocatedMemory();
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310
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311 long memoryUsageDiff = Math.abs(actualMemoryUsage - expectedUsage);
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312 long maxAllowedUsageDiff
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313 = alignmentHelper.getAllowedMemoryUsageDeviation(expectedUsage);
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314
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315 System.out.println("Verifying memory usage in space: " + testedSpace);
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316 System.out.println("Allocated objects count: " + garbage.length);
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317 System.out.println("Desired object size: " + objectSize);
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318 System.out.println("Actual object size: " + actualObjectSize);
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319 System.out.println("Expected object size in space: "
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320 + alignmentHelper.getObjectSizeInThisSpace(objectSize));
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321 System.out.println("Expected memory usage: " + expectedUsage);
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322 System.out.println("Actual memory usage: " + actualMemoryUsage);
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323 System.out.println("Memory usage diff: " + memoryUsageDiff);
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324 System.out.println("Max allowed usage diff: " + maxAllowedUsageDiff);
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325
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326 if (memoryUsageDiff > maxAllowedUsageDiff
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327 && otherThreadsAllocatedMemory) {
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328 System.out.println("Memory usage diff is incorrect, but it seems "
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329 + "like someone else allocated objects");
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330 return;
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331 }
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332
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333 Asserts.assertLTE(memoryUsageDiff, maxAllowedUsageDiff,
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334 "Actual memory usage should not deviate from expected for " +
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335 "more then " + maxAllowedUsageDiff);
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336 }
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337
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338 /**
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339 * Baselines amount of memory allocated by each thread.
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340 */
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341 public void baselineMemoryAllocation() {
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342 ThreadMXBean bean = (ThreadMXBean) ManagementFactory.getThreadMXBean();
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343 threadIds = bean.getAllThreadIds();
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344 baselinedThreadMemoryUsage = bean.getThreadAllocatedBytes(threadIds);
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345 }
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346
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347 /**
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348 * Checks if threads other then the current thread were allocating objects
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349 * after baselinedThreadMemoryUsage call.
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350 *
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351 * If baselinedThreadMemoryUsage was not called, then this method will return
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352 * {@code false}.
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353 */
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354 public boolean areOtherThreadsAllocatedMemory() {
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355 if (baselinedThreadMemoryUsage == null) {
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356 return false;
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357 }
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358
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359 ThreadMXBean bean = (ThreadMXBean) ManagementFactory.getThreadMXBean();
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360 long currentMemoryAllocation[]
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361 = bean.getThreadAllocatedBytes(threadIds);
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362 boolean otherThreadsAllocatedMemory = false;
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363
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364 System.out.println("Verifying amount of memory allocated by threads:");
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365 for (int i = 0; i < threadIds.length; i++) {
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366 System.out.format("Thread %d%nbaseline allocation: %d"
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367 + "%ncurrent allocation:%d%n", threadIds[i],
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368 baselinedThreadMemoryUsage[i], currentMemoryAllocation[i]);
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369 System.out.println(bean.getThreadInfo(threadIds[i]));
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370
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371 long bytesAllocated = Math.abs(currentMemoryAllocation[i]
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372 - baselinedThreadMemoryUsage[i]);
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373 if (bytesAllocated > 0
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374 && threadIds[i] != Thread.currentThread().getId()) {
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375 otherThreadsAllocatedMemory = true;
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376 }
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377 }
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378
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379 return otherThreadsAllocatedMemory;
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380 }
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381
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382 @Override
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383 public String toString() {
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384 StringBuilder builder = new StringBuilder();
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385
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386 builder.append(String.format("SurvivorAlignmentTestMain info:%n"));
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387 builder.append(String.format("Desired object size: %d%n", objectSize));
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388 builder.append(String.format("Memory to fill: %d%n", memoryToFill));
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389 builder.append(String.format("Objects to be allocated: %d%n",
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390 garbage.length));
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391
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392 builder.append(String.format("Alignment helpers to be used: %n"));
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393 for (HeapSpace heapSpace: HeapSpace.values()) {
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394 builder.append(String.format("For space %s:%n%s%n", heapSpace,
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395 getAlignmentHelper(heapSpace)));
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396 }
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397
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398 return builder.toString();
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399 }
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400
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401 /**
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402 * Returns {@code AlignmentHelper} for a space {@code heapSpace}.
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403 */
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404 public static AlignmentHelper getAlignmentHelper(HeapSpace heapSpace) {
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405 switch (heapSpace) {
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406 case EDEN:
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407 return SurvivorAlignmentTestMain.EDEN_SPACE_HELPER;
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408 case SURVIVOR:
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409 return SurvivorAlignmentTestMain.SURVIVOR_SPACE_HELPER;
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410 case TENURED:
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411 return SurvivorAlignmentTestMain.TENURED_SPACE_HELPER;
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412 default:
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413 throw new Error("Unexpected heap space: " + heapSpace);
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414 }
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415 }
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416 }