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annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 4912:a9647476d1a4

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7132029: G1: mixed GC phase lasts for longer than it should Summary: Revamp of the mechanism that chooses old regions for inclusion in the CSet. It simplifies the code and introduces min and max bounds on the number of old regions added to the CSet at each mixed GC to avoid pathological cases. It also ensures that when we do a mixed GC we'll always find old regions to add to the CSet (i.e., it eliminates the case where a mixed GC will collect no old regions which can happen today). Reviewed-by: johnc, brutisso
author tonyp
date Wed, 15 Feb 2012 13:06:53 -0500
parents 1d6185f732aa
children 21595f05bc93
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1 /*
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2 * Copyright (c) 2001, 2012, 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 //
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31 // Defines all globals flags used by the garbage-first compiler.
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32 //
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33
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34 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
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35 \
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36 product(intx, G1ConfidencePercent, 50, \
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37 "Confidence level for MMU/pause predictions") \
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38 \
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39 develop(intx, G1MarkingOverheadPercent, 0, \
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40 "Overhead of concurrent marking") \
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41 \
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42 develop(intx, G1MarkingVerboseLevel, 0, \
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43 "Level (0-4) of verboseness of the marking code") \
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44 \
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45 develop(bool, G1PrintReachableAtInitialMark, false, \
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46 "Reachable object dump at the initial mark pause") \
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47 \
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48 develop(bool, G1VerifyDuringGCPrintReachable, false, \
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49 "If conc mark verification fails, dump reachable objects") \
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50 \
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51 develop(ccstr, G1PrintReachableBaseFile, NULL, \
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52 "The base file name for the reachable object dumps") \
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53 \
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54 develop(bool, G1TraceMarkStackOverflow, false, \
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55 "If true, extra debugging code for CM restart for ovflw.") \
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56 \
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57 diagnostic(bool, G1SummarizeConcMark, false, \
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58 "Summarize concurrent mark info") \
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59 \
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60 diagnostic(bool, G1SummarizeRSetStats, false, \
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61 "Summarize remembered set processing info") \
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62 \
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63 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
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64 "The period (in number of GCs) at which we will generate " \
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65 "update buffer processing info " \
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66 "(0 means do not periodically generate this info); " \
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67 "it also requires -XX:+G1SummarizeRSetStats") \
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68 \
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69 diagnostic(bool, G1TraceConcRefinement, false, \
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70 "Trace G1 concurrent refinement") \
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71 \
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72 product(intx, G1MarkRegionStackSize, 1024 * 1024, \
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73 "Size of the region stack for concurrent marking.") \
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74 \
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75 product(double, G1ConcMarkStepDurationMillis, 10.0, \
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76 "Target duration of individual concurrent marking steps " \
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77 "in milliseconds.") \
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78 \
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79 product(intx, G1RefProcDrainInterval, 10, \
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80 "The number of discovered reference objects to process before " \
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81 "draining concurrent marking work queues.") \
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82 \
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83 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
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84 "If true, enable reference discovery during concurrent " \
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85 "marking and reference processing at the end of remark.") \
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86 \
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87 product(intx, G1SATBBufferSize, 1*K, \
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88 "Number of entries in an SATB log buffer.") \
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89 \
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90 develop(intx, G1SATBProcessCompletedThreshold, 20, \
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91 "Number of completed buffers that triggers log processing.") \
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92 \
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93 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
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94 "Before enqueueing them, each mutator thread tries to do some " \
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95 "filtering on the SATB buffers it generates. If post-filtering " \
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96 "the percentage of retained entries is over this threshold " \
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97 "the buffer will be enqueued for processing. A value of 0 " \
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98 "specifies that mutator threads should not do such filtering.") \
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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, G1DeferredRSUpdate, true, \
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121 "If true, use deferred RS updates") \
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122 \
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123 develop(bool, G1RSLogCheckCardTable, false, \
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124 "If true, verify that no dirty cards remain after RS log " \
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125 "processing.") \
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126 \
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127 develop(bool, G1RSCountHisto, false, \
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128 "If true, print a histogram of RS occupancies after each pause") \
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129 \
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130 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
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131 "Prints the liveness information for all regions in the heap " \
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132 "at the end of a marking cycle.") \
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133 \
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134 develop(bool, G1PrintParCleanupStats, false, \
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135 "When true, print extra stats about parallel cleanup.") \
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136 \
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137 product(intx, G1UpdateBufferSize, 256, \
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138 "Size of an update buffer") \
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139 \
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140 product(intx, G1ConcRefinementYellowZone, 0, \
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141 "Number of enqueued update buffers that will " \
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142 "trigger concurrent processing. Will be selected ergonomically " \
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143 "by default.") \
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144 \
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145 product(intx, G1ConcRefinementRedZone, 0, \
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146 "Maximum number of enqueued update buffers before mutator " \
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147 "threads start processing new ones instead of enqueueing them. " \
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148 "Will be selected ergonomically by default. Zero will disable " \
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149 "concurrent processing.") \
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150 \
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151 product(intx, G1ConcRefinementGreenZone, 0, \
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152 "The number of update buffers that are left in the queue by the " \
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153 "concurrent processing threads. Will be selected ergonomically " \
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154 "by default.") \
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155 \
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156 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
157 "The last concurrent refinement thread wakes up every " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
158 "specified number of milliseconds to do miscellaneous work.") \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
159 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
160 product(intx, G1ConcRefinementThresholdStep, 0, \
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
161 "Each time the rset update queue increases by this amount " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
162 "activate the next refinement thread if available. " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
163 "Will be selected ergonomically by default.") \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
164 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
165 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
166 "A target percentage of time that is allowed to be spend on " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
167 "process RS update buffers during the collection pause.") \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
168 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
169 product(bool, G1UseAdaptiveConcRefinement, true, \
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
170 "Select green, yellow and red zones adaptively to meet the " \
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
171 "the pause requirements.") \
342
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parents:
diff changeset
172 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
173 develop(intx, G1ConcRSLogCacheSize, 10, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
174 "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
175 \
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 745
diff changeset
176 develop(intx, G1ConcRSHotCardLimit, 4, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
177 "The threshold that defines (>=) a hot card.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
178 \
2431
02f49b66361a 7026932: G1: No need to abort VM when card count cache expansion fails
johnc
parents: 2188
diff changeset
179 develop(intx, G1MaxHotCardCountSizePercent, 25, \
02f49b66361a 7026932: G1: No need to abort VM when card count cache expansion fails
johnc
parents: 2188
diff changeset
180 "The maximum size of the hot card count cache as a " \
02f49b66361a 7026932: G1: No need to abort VM when card count cache expansion fails
johnc
parents: 2188
diff changeset
181 "percentage of the number of cards for the maximum heap.") \
02f49b66361a 7026932: G1: No need to abort VM when card count cache expansion fails
johnc
parents: 2188
diff changeset
182 \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
183 develop(bool, G1PrintOopAppls, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
184 "When true, print applications of closures to external locs.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
185 \
1261
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iveresov
parents: 1194
diff changeset
186 develop(intx, G1RSetRegionEntriesBase, 256, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
187 "Max number of regions in a fine-grain table per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
188 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
189 product(intx, G1RSetRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
190 "Max number of regions for which we keep bitmaps." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
191 "Will be set ergonomically by default") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
192 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
193 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
194 "Max number of entries per region in a sparse table " \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
195 "per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
196 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
197 product(intx, G1RSetSparseRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
198 "Max number of entries per region in a sparse table." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
199 "Will be set ergonomically by default.") \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
200 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
201 develop(bool, G1RecordHRRSOops, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
202 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
203 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
204 develop(bool, G1RecordHRRSEvents, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
205 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
206 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
207 develop(intx, G1MaxVerifyFailures, -1, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
208 "The maximum number of verification failrues to print. " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
209 "-1 means print all.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
210 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
211 develop(bool, G1ScrubRemSets, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
212 "When true, do RS scrubbing after cleanup.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
213 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
214 develop(bool, G1RSScrubVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
215 "When true, do RS scrubbing with verbose output.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
216 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
217 develop(bool, G1YoungSurvRateVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
218 "print out the survival rate of young regions according to age.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
219 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
220 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
221 "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
222 "summary.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
223 \
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3888
diff changeset
224 product(uintx, G1ReservePercent, 10, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
225 "It determines the minimum reserve we should have in the heap " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
226 "to minimize the probability of promotion failure.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
227 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
228 diagnostic(bool, G1PrintHeapRegions, false, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
229 "If set G1 will print information on which regions are being " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
230 "allocated and which are reclaimed.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
231 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
232 develop(bool, G1HRRSUseSparseTable, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
233 "When true, use sparse table to save space.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
234 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
235 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
236 "Forces flushing of log buffers before verification.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
237 \
1087
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
238 develop(bool, G1FailOnFPError, false, \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
239 "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
240 "so as to allow debugging") \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
241 \
942
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
242 product(uintx, G1HeapRegionSize, 0, \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
243 "Size of the G1 regions.") \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
244 \
1357
781e29eb8e08 6677708: G1: re-enable parallel RSet updating and scanning
tonyp
parents: 1356
diff changeset
245 experimental(bool, G1UseParallelRSetUpdating, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
246 "Enables the parallelization of remembered set updating " \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
247 "during evacuation pauses") \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
248 \
1357
781e29eb8e08 6677708: G1: re-enable parallel RSet updating and scanning
tonyp
parents: 1356
diff changeset
249 experimental(bool, G1UseParallelRSetScanning, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
250 "Enables the parallelization of remembered set scanning " \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
251 "during evacuation pauses") \
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
252 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
253 product(uintx, G1ConcRefinementThreads, 0, \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
254 "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
255 "otherwise the value is determined ergonomically.") \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
256 \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
257 develop(intx, G1CardCountCacheExpandThreshold, 16, \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
258 "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
259 "a particular entry exceeds this value.") \
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
260 \
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
261 develop(bool, G1VerifyCTCleanup, false, \
1194
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
262 "Verify card table cleanup.") \
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
263 \
1261
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
264 product(uintx, G1RSetScanBlockSize, 64, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
265 "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
266 "during RSet scanning.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
267 \
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
268 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
269 "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
270 "at every append operation") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
271 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
272 develop(bool, G1ConcRegionFreeingVerbose, false, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
273 "Enables verboseness during concurrent region freeing") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
274 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
275 develop(bool, G1StressConcRegionFreeing, false, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
276 "It stresses the concurrent region freeing operation") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
277 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
278 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
279 "Artificial delay during concurrent region freeing") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
280 \
3285
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
281 develop(uintx, G1DummyRegionsPerGC, 0, \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
282 "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
283 "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
284 "heap and stress the marking implementation.") \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
285 \
2188
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2174
diff changeset
286 develop(bool, G1ExitOnExpansionFailure, false, \
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2174
diff changeset
287 "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
288 " 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
289 \
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 3285
diff changeset
290 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
291 "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
292 "concurrent marking") \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
293 \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
294 develop(uintx, G1DefaultMinNewGenPercent, 20, \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
295 "Percentage (0-100) of the heap size to use as minimum " \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
296 "young gen size.") \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
297 \
4786
1d6185f732aa 7128532: G1: Change default value of G1DefaultMaxNewGenPercent to 80
brutisso
parents: 4729
diff changeset
298 develop(uintx, G1DefaultMaxNewGenPercent, 80, \
4729
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
299 "Percentage (0-100) of the heap size to use as maximum " \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
300 "young gen size.") \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
301 \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
302 develop(uintx, G1OldCSetRegionLiveThresholdPercent, 95, \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
303 "Threshold for regions to be added to the collection set. " \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
304 "Regions with more live bytes that this will not be collected.") \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
305 \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
306 develop(uintx, G1OldReclaimableThresholdPercent, 1, \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
307 "Threshold for the remaining old reclaimable bytes, expressed " \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
308 "as a percentage of the heap size. If the old reclaimable bytes " \
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
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309 "are under this we will not collect them with more mixed GCs.") \
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310 \
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311 develop(uintx, G1MaxMixedGCNum, 4, \
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312 "The maximum desired number of mixed GCs after a marking cycle.") \
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313 \
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314 develop(uintx, G1OldCSetRegionThresholdPercent, 10, \
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315 "An upper bound for the number of old CSet regions expressed " \
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316 "as a percentage of the heap size.")
342
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317
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318 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)
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319
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320 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP