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annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 1842:6e0aac35bfa9

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6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue Summary: Under certain circumstances a safepoint could happen between a JavaThread object being created and that object being added to the Java threads list. This could cause the active field of that thread's SATB queue to get out-of-sync with respect to the other Java threads. The solution is to activate the SATB queue, when necessary, before adding the thread to the Java threads list, not when the JavaThread object is created. The changeset also includes a small fix to rename the surrogate locker thread from "Surrogate Locker Thread (CMS)" to "Surrogate Locker Thread (Concurrent GC)" since it's also used in G1. Reviewed-by: iveresov, ysr, johnc, jcoomes
author tonyp
date Fri, 01 Oct 2010 16:43:05 -0400
parents b9bc732be7c0
children c32059ef4dc0
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1 /*
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2 * Copyright (c) 2001, 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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25 //
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26 // Defines all globals flags used by the garbage-first compiler.
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27 //
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28
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29 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
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30 \
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31 product(intx, G1ConfidencePercent, 50, \
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32 "Confidence level for MMU/pause predictions") \
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33 \
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34 develop(intx, G1MarkingOverheadPercent, 0, \
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35 "Overhead of concurrent marking") \
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36 \
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37 develop(bool, G1Gen, true, \
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38 "If true, it will enable the generational G1") \
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39 \
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40 develop(intx, G1PolicyVerbose, 0, \
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41 "The verbosity level on G1 policy decisions") \
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42 \
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43 develop(bool, G1UseHRIntoRS, true, \
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44 "Determines whether the 'advanced' HR Into rem set is used.") \
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45 \
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46 develop(intx, G1MarkingVerboseLevel, 0, \
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47 "Level (0-4) of verboseness of the marking code") \
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48 \
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49 develop(bool, G1PrintReachableAtInitialMark, false, \
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50 "Reachable object dump at the initial mark pause") \
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51 \
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52 develop(bool, G1VerifyDuringGCPrintReachable, false, \
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53 "If conc mark verification fails, dump reachable objects") \
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54 \
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55 develop(ccstr, G1PrintReachableBaseFile, NULL, \
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56 "The base file name for the reachable object dumps") \
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57 \
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58 develop(bool, G1TraceMarkStackOverflow, false, \
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59 "If true, extra debugging code for CM restart for ovflw.") \
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60 \
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61 develop(intx, G1PausesBtwnConcMark, -1, \
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62 "If positive, fixed number of pauses between conc markings") \
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63 \
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64 diagnostic(bool, G1SummarizeConcMark, false, \
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65 "Summarize concurrent mark info") \
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66 \
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67 diagnostic(bool, G1SummarizeRSetStats, false, \
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68 "Summarize remembered set processing info") \
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69 \
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70 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
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71 "The period (in number of GCs) at which we will generate " \
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72 "update buffer processing info " \
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73 "(0 means do not periodically generate this info); " \
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74 "it also requires -XX:+G1SummarizeRSetStats") \
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75 \
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76 diagnostic(bool, G1SummarizeZFStats, false, \
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77 "Summarize zero-filling info") \
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78 \
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79 diagnostic(bool, G1TraceConcRefinement, false, \
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80 "Trace G1 concurrent refinement") \
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81 \
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82 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
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83 "Size of the region stack for concurrent marking.") \
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84 \
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85 develop(bool, G1ConcZeroFill, true, \
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86 "If true, run concurrent zero-filling thread") \
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87 \
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88 develop(intx, G1ConcZFMaxRegions, 1, \
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89 "Stop zero-filling when # of zf'd regions reaches") \
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90 \
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91 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
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92 "If true, count frac of ptr writes with null pre-vals.") \
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93 \
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94 product(intx, G1SATBBufferSize, 1*K, \
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95 "Number of entries in an SATB log buffer.") \
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96 \
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97 develop(intx, G1SATBProcessCompletedThreshold, 20, \
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98 "Number of completed buffers that triggers log processing.") \
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99 \
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100 develop(intx, G1ExtraRegionSurvRate, 33, \
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101 "If the young survival rate is S, and there's room left in " \
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102 "to-space, we will allow regions whose survival rate is up to " \
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103 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
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104 \
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105 develop(intx, G1InitYoungSurvRatio, 50, \
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106 "Expected Survival Rate for newly allocated bytes") \
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107 \
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108 develop(bool, G1SATBPrintStubs, false, \
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109 "If true, print generated stubs for the SATB barrier") \
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110 \
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111 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
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112 "When expanding, % of uncommitted space to claim.") \
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113 \
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114 develop(bool, G1RSBarrierRegionFilter, true, \
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115 "If true, generate region filtering code in RS barrier") \
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116 \
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117 develop(bool, G1RSBarrierNullFilter, true, \
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118 "If true, generate null-pointer filtering code in RS barrier") \
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119 \
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120 develop(bool, G1PrintCTFilterStats, false, \
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121 "If true, print stats on RS filtering effectiveness") \
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122 \
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123 develop(bool, G1DeferredRSUpdate, true, \
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124 "If true, use deferred RS updates") \
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125 \
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126 develop(bool, G1RSLogCheckCardTable, false, \
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127 "If true, verify that no dirty cards remain after RS log " \
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128 "processing.") \
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129 \
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130 develop(bool, G1RSCountHisto, false, \
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131 "If true, print a histogram of RS occupancies after each pause") \
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132 \
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133 develop(intx, G1PrintRegionLivenessInfo, 0, \
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134 "When > 0, print the occupancies of the <n> best and worst" \
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135 "regions.") \
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136 \
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137 develop(bool, G1PrintParCleanupStats, false, \
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138 "When true, print extra stats about parallel cleanup.") \
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139 \
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140 develop(bool, G1DisablePreBarrier, false, \
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141 "Disable generation of pre-barrier (i.e., marking barrier) ") \
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142 \
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143 develop(bool, G1DisablePostBarrier, false, \
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144 "Disable generation of post-barrier (i.e., RS barrier) ") \
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145 \
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146 product(intx, G1UpdateBufferSize, 256, \
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147 "Size of an update buffer") \
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148 \
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149 product(intx, G1ConcRefinementYellowZone, 0, \
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150 "Number of enqueued update buffers that will " \
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151 "trigger concurrent processing. Will be selected ergonomically " \
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152 "by default.") \
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153 \
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154 product(intx, G1ConcRefinementRedZone, 0, \
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155 "Maximum number of enqueued update buffers before mutator " \
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156 "threads start processing new ones instead of enqueueing them. " \
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157 "Will be selected ergonomically by default. Zero will disable " \
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158 "concurrent processing.") \
44f61c24ddab 6862387: tune concurrent refinement further
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159 \
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160 product(intx, G1ConcRefinementGreenZone, 0, \
1111
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161 "The number of update buffers that are left in the queue by the " \
44f61c24ddab 6862387: tune concurrent refinement further
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162 "concurrent processing threads. Will be selected ergonomically " \
44f61c24ddab 6862387: tune concurrent refinement further
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163 "by default.") \
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164 \
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165 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
1111
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166 "The last concurrent refinement thread wakes up every " \
44f61c24ddab 6862387: tune concurrent refinement further
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167 "specified number of milliseconds to do miscellaneous work.") \
44f61c24ddab 6862387: tune concurrent refinement further
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168 \
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169 product(intx, G1ConcRefinementThresholdStep, 0, \
1111
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170 "Each time the rset update queue increases by this amount " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
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171 "activate the next refinement thread if available. " \
44f61c24ddab 6862387: tune concurrent refinement further
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172 "Will be selected ergonomically by default.") \
44f61c24ddab 6862387: tune concurrent refinement further
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173 \
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174 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
1111
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175 "A target percentage of time that is allowed to be spend on " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
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176 "process RS update buffers during the collection pause.") \
44f61c24ddab 6862387: tune concurrent refinement further
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177 \
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178 product(bool, G1UseAdaptiveConcRefinement, true, \
1111
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179 "Select green, yellow and red zones adaptively to meet the " \
44f61c24ddab 6862387: tune concurrent refinement further
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180 "the pause requirements.") \
342
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181 \
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182 develop(intx, G1ConcRSLogCacheSize, 10, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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183 "Log base 2 of the length of conc RS hot-card cache.") \
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184 \
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185 develop(intx, G1ConcRSHotCardLimit, 4, \
342
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186 "The threshold that defines (>=) a hot card.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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187 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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188 develop(bool, G1PrintOopAppls, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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189 "When true, print applications of closures to external locs.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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190 \
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191 develop(intx, G1RSetRegionEntriesBase, 256, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
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192 "Max number of regions in a fine-grain table per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
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193 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
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194 product(intx, G1RSetRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
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195 "Max number of regions for which we keep bitmaps." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
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196 "Will be set ergonomically by default") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
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197 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
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198 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
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199 "Max number of entries per region in a sparse table " \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
200 "per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
201 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
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202 product(intx, G1RSetSparseRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
203 "Max number of entries per region in a sparse table." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
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204 "Will be set ergonomically by default.") \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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205 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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206 develop(bool, G1RecordHRRSOops, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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207 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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208 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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209 develop(bool, G1RecordHRRSEvents, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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210 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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211 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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212 develop(intx, G1MaxVerifyFailures, -1, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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213 "The maximum number of verification failrues to print. " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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214 "-1 means print all.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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215 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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216 develop(bool, G1ScrubRemSets, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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217 "When true, do RS scrubbing after cleanup.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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218 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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219 develop(bool, G1RSScrubVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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220 "When true, do RS scrubbing with verbose output.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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221 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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222 develop(bool, G1YoungSurvRateVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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223 "print out the survival rate of young regions according to age.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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224 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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225 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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226 "the number of regions for which we'll print a surv rate " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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227 "summary.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
228 \
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229 product(intx, G1ReservePercent, 10, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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230 "It determines the minimum reserve we should have in the heap " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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231 "to minimize the probability of promotion failure.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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232 \
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parents: 1261
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233 diagnostic(bool, G1PrintHeapRegions, false, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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234 "If set G1 will print information on which regions are being " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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235 "allocated and which are reclaimed.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
236 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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237 develop(bool, G1HRRSUseSparseTable, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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238 "When true, use sparse table to save space.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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239 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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240 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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241 "Forces flushing of log buffers before verification.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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242 \
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ysr
parents: 1044
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243 develop(bool, G1FailOnFPError, false, \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
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244 "When set, G1 will fail when it encounters an FP 'error', " \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
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245 "so as to allow debugging") \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
246 \
751
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johnc
parents: 745
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247 develop(bool, G1FixedTenuringThreshold, false, \
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
248 "When set, G1 will not adjust the tenuring threshold") \
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
249 \
751
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johnc
parents: 745
diff changeset
250 develop(bool, G1FixedEdenSize, false, \
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
251 "When set, G1 will not allocate unused survivor space regions") \
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
252 \
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 745
diff changeset
253 develop(uintx, G1FixedSurvivorSpaceSize, 0, \
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
254 "If non-0 is the size of the G1 survivor space, " \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
255 "otherwise SurvivorRatio is used to determine the size") \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
256 \
942
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
257 product(uintx, G1HeapRegionSize, 0, \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
258 "Size of the G1 regions.") \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
259 \
1357
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tonyp
parents: 1356
diff changeset
260 experimental(bool, G1UseParallelRSetUpdating, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
261 "Enables the parallelization of remembered set updating " \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
262 "during evacuation pauses") \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
263 \
1357
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tonyp
parents: 1356
diff changeset
264 experimental(bool, G1UseParallelRSetScanning, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
265 "Enables the parallelization of remembered set scanning " \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
266 "during evacuation pauses") \
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
267 \
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tonyp
parents: 1261
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268 product(uintx, G1ConcRefinementThreads, 0, \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
269 "If non-0 is the number of parallel rem set update threads, " \
890
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
270 "otherwise the value is determined ergonomically.") \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
271 \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
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272 develop(intx, G1CardCountCacheExpandThreshold, 16, \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
273 "Expand the card count cache if the number of collisions for " \
940
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
274 "a particular entry exceeds this value.") \
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
275 \
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
276 develop(bool, G1VerifyCTCleanup, false, \
1194
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
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277 "Verify card table cleanup.") \
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
278 \
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parents: 1194
diff changeset
279 product(uintx, G1RSetScanBlockSize, 64, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
280 "Size of a work unit of cards claimed by a worker thread" \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
281 "during RSet scanning.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
282 \
1194
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
283 develop(bool, ReduceInitialCardMarksForG1, false, \
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
284 "When ReduceInitialCardMarks is true, this flag setting " \
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
285 " controls whether G1 allows the RICM optimization")
342
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diff changeset
286
350
d28aa69f0959 6618726: Introduce -XX:+UnlockExperimentalVMOptions flag
ysr
parents: 342
diff changeset
287 G1_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG)