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annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 10246:194f52aa2f23

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7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap Summary: Refactor G1's hot card cache and card counts table into their own files. Simplify the card counts table, including removing the encoding of the card index in each entry. The card counts table now has a 1:1 correspondence with the cards spanned by heap. Space for the card counts table is reserved from virtual memory (rather than C heap) during JVM startup and is committed/expanded when the heap is expanded. Changes were also reviewed-by Vitaly Davidovich. Reviewed-by: tschatzl, jmasa
author johnc
date Thu, 09 May 2013 11:16:39 -0700
parents f1fb03a251e9
children 3a4805ad0005
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1 /*
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
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27
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28 #include "runtime/globals.hpp"
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29 //
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30 // Defines all globals flags used by the garbage-first compiler.
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31 //
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32
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33 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
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34 \
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35 product(uintx, G1ConfidencePercent, 50, \
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36 "Confidence level for MMU/pause predictions") \
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37 \
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38 develop(intx, G1MarkingOverheadPercent, 0, \
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39 "Overhead of concurrent marking") \
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40 \
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41 develop(intx, G1MarkingVerboseLevel, 0, \
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42 "Level (0-4) of verboseness of the marking code") \
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43 \
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44 develop(bool, G1PrintReachableAtInitialMark, false, \
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45 "Reachable object dump at the initial mark pause") \
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46 \
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47 develop(bool, G1VerifyDuringGCPrintReachable, false, \
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48 "If conc mark verification fails, dump reachable objects") \
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49 \
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50 develop(ccstr, G1PrintReachableBaseFile, NULL, \
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51 "The base file name for the reachable object dumps") \
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52 \
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53 develop(bool, G1TraceMarkStackOverflow, false, \
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54 "If true, extra debugging code for CM restart for ovflw.") \
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55 \
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56 develop(bool, G1TraceHeapRegionRememberedSet, false, \
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57 "Enables heap region remembered set debug logs") \
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58 \
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59 diagnostic(bool, G1SummarizeConcMark, false, \
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60 "Summarize concurrent mark info") \
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61 \
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62 diagnostic(bool, G1SummarizeRSetStats, false, \
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63 "Summarize remembered set processing info") \
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64 \
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65 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
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66 "The period (in number of GCs) at which we will generate " \
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67 "update buffer processing info " \
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68 "(0 means do not periodically generate this info); " \
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69 "it also requires -XX:+G1SummarizeRSetStats") \
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70 \
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71 diagnostic(bool, G1TraceConcRefinement, false, \
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72 "Trace G1 concurrent refinement") \
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73 \
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74 product(double, G1ConcMarkStepDurationMillis, 10.0, \
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75 "Target duration of individual concurrent marking steps " \
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76 "in milliseconds.") \
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77 \
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78 product(intx, G1RefProcDrainInterval, 10, \
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79 "The number of discovered reference objects to process before " \
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80 "draining concurrent marking work queues.") \
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81 \
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82 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
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83 "If true, enable reference discovery during concurrent " \
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84 "marking and reference processing at the end of remark.") \
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85 \
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86 product(intx, G1SATBBufferSize, 1*K, \
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87 "Number of entries in an SATB log buffer.") \
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88 \
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89 develop(intx, G1SATBProcessCompletedThreshold, 20, \
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90 "Number of completed buffers that triggers log processing.") \
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91 \
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92 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
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93 "Before enqueueing them, each mutator thread tries to do some " \
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94 "filtering on the SATB buffers it generates. If post-filtering " \
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95 "the percentage of retained entries is over this threshold " \
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96 "the buffer will be enqueued for processing. A value of 0 " \
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97 "specifies that mutator threads should not do such filtering.") \
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98 \
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99 develop(intx, G1ExtraRegionSurvRate, 33, \
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100 "If the young survival rate is S, and there's room left in " \
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101 "to-space, we will allow regions whose survival rate is up to " \
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102 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
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103 \
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104 develop(bool, G1SATBPrintStubs, false, \
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105 "If true, print generated stubs for the SATB barrier") \
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106 \
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107 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
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108 "When expanding, % of uncommitted space to claim.") \
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109 \
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110 develop(bool, G1RSBarrierRegionFilter, true, \
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111 "If true, generate region filtering code in RS barrier") \
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112 \
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113 develop(bool, G1RSBarrierNullFilter, true, \
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114 "If true, generate null-pointer filtering code in RS barrier") \
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115 \
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116 develop(bool, G1DeferredRSUpdate, true, \
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117 "If true, use deferred RS updates") \
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118 \
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119 develop(bool, G1RSLogCheckCardTable, false, \
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120 "If true, verify that no dirty cards remain after RS log " \
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121 "processing.") \
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122 \
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123 develop(bool, G1RSCountHisto, false, \
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124 "If true, print a histogram of RS occupancies after each pause") \
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125 \
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126 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
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127 "Prints the liveness information for all regions in the heap " \
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128 "at the end of a marking cycle.") \
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129 \
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130 product(intx, G1UpdateBufferSize, 256, \
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131 "Size of an update buffer") \
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132 \
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133 product(intx, G1ConcRefinementYellowZone, 0, \
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134 "Number of enqueued update buffers that will " \
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135 "trigger concurrent processing. Will be selected ergonomically " \
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136 "by default.") \
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137 \
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138 product(intx, G1ConcRefinementRedZone, 0, \
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139 "Maximum number of enqueued update buffers before mutator " \
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140 "threads start processing new ones instead of enqueueing them. " \
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141 "Will be selected ergonomically by default. Zero will disable " \
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142 "concurrent processing.") \
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143 \
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144 product(intx, G1ConcRefinementGreenZone, 0, \
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145 "The number of update buffers that are left in the queue by the " \
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146 "concurrent processing threads. Will be selected ergonomically " \
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147 "by default.") \
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148 \
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149 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
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150 "The last concurrent refinement thread wakes up every " \
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151 "specified number of milliseconds to do miscellaneous work.") \
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152 \
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153 product(intx, G1ConcRefinementThresholdStep, 0, \
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154 "Each time the rset update queue increases by this amount " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
155 "activate the next refinement thread if available. " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
156 "Will be selected ergonomically by default.") \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
157 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
158 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
159 "A target percentage of time that is allowed to be spend on " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
160 "process RS update buffers during the collection pause.") \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
161 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
162 product(bool, G1UseAdaptiveConcRefinement, true, \
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
163 "Select green, yellow and red zones adaptively to meet the " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
164 "the pause requirements.") \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
165 \
10246
194f52aa2f23 7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents: 8094
diff changeset
166 product(uintx, G1ConcRSLogCacheSize, 10, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
167 "Log base 2 of the length of conc RS hot-card cache.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
168 \
10246
194f52aa2f23 7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents: 8094
diff changeset
169 product(uintx, G1ConcRSHotCardLimit, 4, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
170 "The threshold that defines (>=) a hot card.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
171 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
172 develop(bool, G1PrintOopAppls, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
173 "When true, print applications of closures to external locs.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
174 \
1261
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
175 develop(intx, G1RSetRegionEntriesBase, 256, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
176 "Max number of regions in a fine-grain table per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
177 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
178 product(intx, G1RSetRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
179 "Max number of regions for which we keep bitmaps." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
180 "Will be set ergonomically by default") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
181 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
182 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
183 "Max number of entries per region in a sparse table " \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
184 "per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
185 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
186 product(intx, G1RSetSparseRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
187 "Max number of entries per region in a sparse table." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
188 "Will be set ergonomically by default.") \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
189 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
190 develop(bool, G1RecordHRRSOops, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
191 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
192 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
193 develop(bool, G1RecordHRRSEvents, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
194 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
195 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
196 develop(intx, G1MaxVerifyFailures, -1, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
197 "The maximum number of verification failrues to print. " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
198 "-1 means print all.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
199 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
200 develop(bool, G1ScrubRemSets, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
201 "When true, do RS scrubbing after cleanup.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
202 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
203 develop(bool, G1RSScrubVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
204 "When true, do RS scrubbing with verbose output.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
205 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
206 develop(bool, G1YoungSurvRateVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
207 "print out the survival rate of young regions according to age.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
208 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
209 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
210 "the number of regions for which we'll print a surv rate " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
211 "summary.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
212 \
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3888
diff changeset
213 product(uintx, G1ReservePercent, 10, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
214 "It determines the minimum reserve we should have in the heap " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
215 "to minimize the probability of promotion failure.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
216 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
217 diagnostic(bool, G1PrintHeapRegions, false, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
218 "If set G1 will print information on which regions are being " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
219 "allocated and which are reclaimed.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
220 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
221 develop(bool, G1HRRSUseSparseTable, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
222 "When true, use sparse table to save space.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
223 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
224 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
225 "Forces flushing of log buffers before verification.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
226 \
1087
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
227 develop(bool, G1FailOnFPError, false, \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
228 "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
diff changeset
229 "so as to allow debugging") \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
230 \
942
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
231 product(uintx, G1HeapRegionSize, 0, \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
232 "Size of the G1 regions.") \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
233 \
1357
781e29eb8e08 6677708: G1: re-enable parallel RSet updating and scanning
tonyp
parents: 1356
diff changeset
234 experimental(bool, G1UseParallelRSetUpdating, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
235 "Enables the parallelization of remembered set updating " \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
236 "during evacuation pauses") \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
237 \
1357
781e29eb8e08 6677708: G1: re-enable parallel RSet updating and scanning
tonyp
parents: 1356
diff changeset
238 experimental(bool, G1UseParallelRSetScanning, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
239 "Enables the parallelization of remembered set scanning " \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
240 "during evacuation pauses") \
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
241 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
242 product(uintx, G1ConcRefinementThreads, 0, \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
243 "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
244 "otherwise the value is determined ergonomically.") \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
245 \
940
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
246 develop(bool, G1VerifyCTCleanup, false, \
1194
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
247 "Verify card table cleanup.") \
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
248 \
1261
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
249 product(uintx, G1RSetScanBlockSize, 64, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
250 "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
251 "during RSet scanning.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
252 \
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
253 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
254 "The number of regions we will add to the secondary free list " \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
255 "at every append operation") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
256 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
257 develop(bool, G1ConcRegionFreeingVerbose, false, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
258 "Enables verboseness during concurrent region freeing") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
259 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
260 develop(bool, G1StressConcRegionFreeing, false, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
261 "It stresses the concurrent region freeing operation") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
262 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
263 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
264 "Artificial delay during concurrent region freeing") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
265 \
3285
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
266 develop(uintx, G1DummyRegionsPerGC, 0, \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
267 "The number of dummy regions G1 will allocate at the end of " \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
268 "each evacuation pause in order to artificially fill up the " \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
269 "heap and stress the marking implementation.") \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
270 \
2188
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2174
diff changeset
271 develop(bool, G1ExitOnExpansionFailure, false, \
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2174
diff changeset
272 "Raise a fatal VM exit out of memory failure in the event " \
3316
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 3285
diff changeset
273 " that heap expansion fails due to running out of swap.") \
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 3285
diff changeset
274 \
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 3285
diff changeset
275 develop(uintx, G1ConcMarkForceOverflow, 0, \
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 3285
diff changeset
276 "The number of times we'll force an overflow during " \
4729
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
277 "concurrent marking") \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
278 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
279 experimental(uintx, G1NewSizePercent, 5, \
7449
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
280 "Percentage (0-100) of the heap size to use as default " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
281 "minimum young gen size.") \
4729
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
282 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
283 experimental(uintx, G1MaxNewSizePercent, 60, \
7449
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
284 "Percentage (0-100) of the heap size to use as default " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
285 " maximum young gen size.") \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
286 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
287 experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \
7449
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
288 "Threshold for regions to be considered for inclusion in the " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
289 "collection set of mixed GCs. " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
290 "Regions with live bytes exceeding this will not be collected.") \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
291 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
292 product(uintx, G1HeapWastePercent, 10, \
5964
21595f05bc93 7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs
tonyp
parents: 4912
diff changeset
293 "Amount of space, expressed as a percentage of the heap size, " \
21595f05bc93 7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs
tonyp
parents: 4912
diff changeset
294 "that G1 is willing not to collect to avoid expensive GCs.") \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
295 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
296 product(uintx, G1MixedGCCountTarget, 8, \
5964
21595f05bc93 7146246: G1: expose some of the -XX flags that drive which old regions to collect during mixed GCs
tonyp
parents: 4912
diff changeset
297 "The target number of mixed GCs after a marking cycle.") \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
298 \
6612
3650da95d2ee 7193157: G1: Make some develpflags available in product builds
brutisso
parents: 6188
diff changeset
299 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
300 "An upper bound for the number of old CSet regions expressed " \
6007
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
301 "as a percentage of the heap size.") \
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
302 \
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
303 experimental(ccstr, G1LogLevel, NULL, \
6629
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
304 "Log level for G1 logging: fine, finer, finest") \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
305 \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
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306 notproduct(bool, G1EvacuationFailureALot, false, \
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307 "Force use of evacuation failure handling during certain " \
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308 "evacuation pauses") \
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309 \
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310 develop(uintx, G1EvacuationFailureALotCount, 1000, \
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311 "Number of successful evacuations between evacuation failures " \
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312 "occurring at object copying") \
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313 \
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314 develop(uintx, G1EvacuationFailureALotInterval, 5, \
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315 "Total collections between forced triggering of evacuation " \
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316 "failures") \
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317 \
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318 develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
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319 "Force use of evacuation failure handling during evacuation " \
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320 "pauses when marking is in progress") \
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321 \
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322 develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
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323 "Force use of evacuation failure handling during initial mark " \
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324 "evacuation pauses") \
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325 \
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326 develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
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327 "Force use of evacuation failure handling during young " \
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328 "evacuation pauses") \
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329 \
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330 develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
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331 "Force use of evacuation failure handling during mixed " \
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332 "evacuation pauses")
342
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333
350
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334 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)
1972
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335
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336 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP