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annotate src/share/vm/gc_implementation/g1/g1_globals.hpp @ 20504:6948da6d7c13

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8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set Summary: Remove -XX:-G1DeferredRSUpdate functionality as it is racy. During evacuation failure handling, threads where evacuation failure handling occurred may try to add remembered sets to regions which remembered sets are currently being scanned. The iterator to handle the remembered set scan does not support addition of entries during scan and so may skip valid references. Reviewed-by: iveresov, brutisso, mgerdin
author tschatzl
date Tue, 30 Sep 2014 09:44:36 +0200
parents 7baf47cb97cb
children fa14838b03c4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #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 experimental(bool, G1TraceStringSymbolTableScrubbing, false, \
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75 "Trace information string and symbol table scrubbing.") \
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76 \
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77 product(double, G1ConcMarkStepDurationMillis, 10.0, \
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78 "Target duration of individual concurrent marking steps " \
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79 "in milliseconds.") \
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80 \
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81 product(intx, G1RefProcDrainInterval, 10, \
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82 "The number of discovered reference objects to process before " \
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83 "draining concurrent marking work queues.") \
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84 \
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85 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
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86 "If true, enable reference discovery during concurrent " \
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87 "marking and reference processing at the end of remark.") \
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88 \
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89 product(intx, G1SATBBufferSize, 1*K, \
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90 "Number of entries in an SATB log buffer.") \
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91 \
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92 develop(intx, G1SATBProcessCompletedThreshold, 20, \
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93 "Number of completed buffers that triggers log processing.") \
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94 \
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95 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
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96 "Before enqueueing them, each mutator thread tries to do some " \
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97 "filtering on the SATB buffers it generates. If post-filtering " \
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98 "the percentage of retained entries is over this threshold " \
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99 "the buffer will be enqueued for processing. A value of 0 " \
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100 "specifies that mutator threads should not do such filtering.") \
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101 \
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102 develop(bool, G1SATBPrintStubs, false, \
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103 "If true, print generated stubs for the SATB barrier") \
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104 \
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105 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
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106 "When expanding, % of uncommitted space to claim.") \
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107 \
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108 develop(bool, G1RSBarrierRegionFilter, true, \
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109 "If true, generate region filtering code in RS barrier") \
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110 \
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111 develop(bool, G1RSLogCheckCardTable, false, \
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112 "If true, verify that no dirty cards remain after RS log " \
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113 "processing.") \
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114 \
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115 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
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116 "Prints the liveness information for all regions in the heap " \
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117 "at the end of a marking cycle.") \
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118 \
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119 product(intx, G1UpdateBufferSize, 256, \
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120 "Size of an update buffer") \
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121 \
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122 product(intx, G1ConcRefinementYellowZone, 0, \
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123 "Number of enqueued update buffers that will " \
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124 "trigger concurrent processing. Will be selected ergonomically " \
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125 "by default.") \
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126 \
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127 product(intx, G1ConcRefinementRedZone, 0, \
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128 "Maximum number of enqueued update buffers before mutator " \
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129 "threads start processing new ones instead of enqueueing them. " \
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130 "Will be selected ergonomically by default. Zero will disable " \
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131 "concurrent processing.") \
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132 \
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133 product(intx, G1ConcRefinementGreenZone, 0, \
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134 "The number of update buffers that are left in the queue by the " \
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135 "concurrent processing threads. Will be selected ergonomically " \
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136 "by default.") \
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137 \
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138 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
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139 "The last concurrent refinement thread wakes up every " \
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140 "specified number of milliseconds to do miscellaneous work.") \
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141 \
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142 product(intx, G1ConcRefinementThresholdStep, 0, \
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143 "Each time the rset update queue increases by this amount " \
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144 "activate the next refinement thread if available. " \
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145 "Will be selected ergonomically by default.") \
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146 \
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147 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
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148 "A target percentage of time that is allowed to be spend on " \
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149 "process RS update buffers during the collection pause.") \
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150 \
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151 product(bool, G1UseAdaptiveConcRefinement, true, \
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152 "Select green, yellow and red zones adaptively to meet the " \
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153 "the pause requirements.") \
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154 \
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johnc
parents: 8094
diff changeset
155 product(uintx, G1ConcRSLogCacheSize, 10, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
156 "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
157 \
10246
194f52aa2f23 7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents: 8094
diff changeset
158 product(uintx, G1ConcRSHotCardLimit, 4, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
159 "The threshold that defines (>=) a hot card.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
160 \
1261
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
161 develop(intx, G1RSetRegionEntriesBase, 256, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
162 "Max number of regions in a fine-grain table per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
163 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
164 product(intx, G1RSetRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
165 "Max number of regions for which we keep bitmaps." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
166 "Will be set ergonomically by default") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
167 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
168 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
169 "Max number of entries per region in a sparse table " \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
170 "per MB.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
171 \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
172 product(intx, G1RSetSparseRegionEntries, 0, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
173 "Max number of entries per region in a sparse table." \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
174 "Will be set ergonomically by default.") \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
175 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
176 develop(bool, G1RecordHRRSOops, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
177 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
178 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
179 develop(bool, G1RecordHRRSEvents, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
180 "When true, record recent calls to rem set operations.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
181 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
182 develop(intx, G1MaxVerifyFailures, -1, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
183 "The maximum number of verification failrues to print. " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
184 "-1 means print all.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
185 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
186 develop(bool, G1ScrubRemSets, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
187 "When true, do RS scrubbing after cleanup.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
188 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
189 develop(bool, G1RSScrubVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
190 "When true, do RS scrubbing with verbose output.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
191 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
192 develop(bool, G1YoungSurvRateVerbose, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
193 "print out the survival rate of young regions according to age.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
194 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
195 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
196 "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
197 "summary.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
198 \
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3888
diff changeset
199 product(uintx, G1ReservePercent, 10, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
200 "It determines the minimum reserve we should have in the heap " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
201 "to minimize the probability of promotion failure.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
202 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
203 diagnostic(bool, G1PrintHeapRegions, false, \
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
204 "If set G1 will print information on which regions are being " \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
205 "allocated and which are reclaimed.") \
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(bool, G1HRRSUseSparseTable, true, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
208 "When true, use sparse table to save space.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
209 \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
210 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
211 "Forces flushing of log buffers before verification.") \
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
212 \
1087
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
213 develop(bool, G1FailOnFPError, false, \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
214 "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
215 "so as to allow debugging") \
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1044
diff changeset
216 \
942
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
217 product(uintx, G1HeapRegionSize, 0, \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
218 "Size of the G1 regions.") \
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
tonyp
parents: 940
diff changeset
219 \
1357
781e29eb8e08 6677708: G1: re-enable parallel RSet updating and scanning
tonyp
parents: 1356
diff changeset
220 experimental(bool, G1UseParallelRSetUpdating, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
221 "Enables the parallelization of remembered set updating " \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
222 "during evacuation pauses") \
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
223 \
1357
781e29eb8e08 6677708: G1: re-enable parallel RSet updating and scanning
tonyp
parents: 1356
diff changeset
224 experimental(bool, G1UseParallelRSetScanning, true, \
638
2a5da27ccae9 6816154: G1: introduce flags to enable/disable RSet updating and scanning
tonyp
parents: 616
diff changeset
225 "Enables the parallelization of remembered set scanning " \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
226 "during evacuation pauses") \
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
227 \
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
228 product(uintx, G1ConcRefinementThreads, 0, \
794
315a5d70b295 6484957: G1: parallel concurrent refinement
iveresov
parents: 751
diff changeset
229 "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
230 "otherwise the value is determined ergonomically.") \
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 884
diff changeset
231 \
940
8624da129f0b 6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents: 936
diff changeset
232 develop(bool, G1VerifyCTCleanup, false, \
1194
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
233 "Verify card table cleanup.") \
34fb2662f6c2 6920090: G1: Disable ReduceInitialCardMarks at least until 6920109 is fixed
ysr
parents: 1111
diff changeset
234 \
1261
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
235 product(uintx, G1RSetScanBlockSize, 64, \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
236 "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
237 "during RSet scanning.") \
0414c1049f15 6923991: G1: improve scalability of RSet scanning
iveresov
parents: 1194
diff changeset
238 \
2152
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
239 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
240 "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
241 "at every append operation") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
242 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
243 develop(bool, G1ConcRegionFreeingVerbose, false, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
244 "Enables verboseness during concurrent region freeing") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
245 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
246 develop(bool, G1StressConcRegionFreeing, false, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
247 "It stresses the concurrent region freeing operation") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
248 \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
249 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
250 "Artificial delay during concurrent region freeing") \
0fa27f37d4d4 6977804: G1: remove the zero-filling thread
tonyp
parents: 2149
diff changeset
251 \
3285
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
252 develop(uintx, G1DummyRegionsPerGC, 0, \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
253 "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
254 "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
255 "heap and stress the marking implementation.") \
49a67202bc67 7011855: G1: non-product flag to artificially grow the heap
tonyp
parents: 3249
diff changeset
256 \
2188
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2174
diff changeset
257 develop(bool, G1ExitOnExpansionFailure, false, \
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2174
diff changeset
258 "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
259 " 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
260 \
cd8e33b2a8ad 7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents: 3285
diff changeset
261 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
262 "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
263 "concurrent marking") \
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
264 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
265 experimental(uintx, G1NewSizePercent, 5, \
7449
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
266 "Percentage (0-100) of the heap size to use as default " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
267 "minimum young gen size.") \
4729
1cbe7978b021 7113021: G1: automatically enable young gen size auto-tuning when -Xms==-Xmx
brutisso
parents: 4090
diff changeset
268 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
269 experimental(uintx, G1MaxNewSizePercent, 60, \
7449
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
270 "Percentage (0-100) of the heap size to use as default " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
271 " maximum young gen size.") \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
272 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
273 experimental(uintx, G1MixedGCLiveThresholdPercent, 65, \
7449
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
274 "Threshold for regions to be considered for inclusion in the " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
275 "collection set of mixed GCs. " \
37f7535e5f18 8001424: G1: Rename certain G1-specific flags
johnc
parents: 6629
diff changeset
276 "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
277 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
278 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
279 "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
280 "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
281 \
7612
4967eb4f67a9 8001425: G1: Change the default values for certain G1 specific flags
johnc
parents: 7449
diff changeset
282 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
283 "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
284 \
20305
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
285 experimental(bool, G1ReclaimDeadHumongousObjectsAtYoungGC, true, \
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
286 "Try to reclaim dead large objects at every young GC.") \
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
287 \
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
288 experimental(bool, G1TraceReclaimDeadHumongousObjectsAtYoungGC, false, \
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
289 "Print some information about large object liveness " \
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
290 "at every young GC.") \
755930f931e3 8027959: Early reclamation of large objects in G1
tschatzl
parents: 17753
diff changeset
291 \
6612
3650da95d2ee 7193157: G1: Make some develpflags available in product builds
brutisso
parents: 6188
diff changeset
292 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
4912
a9647476d1a4 7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents: 4786
diff changeset
293 "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
294 "as a percentage of the heap size.") \
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
295 \
5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging
brutisso
parents: 5988
diff changeset
296 experimental(ccstr, G1LogLevel, NULL, \
6629
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
297 "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
298 \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
299 notproduct(bool, G1EvacuationFailureALot, false, \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
300 "Force use of evacuation failure handling during certain " \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
301 "evacuation pauses") \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
302 \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
303 develop(uintx, G1EvacuationFailureALotCount, 1000, \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
304 "Number of successful evacuations between evacuation failures " \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents: 6612
diff changeset
305 "occurring at object copying") \
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306 \
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307 develop(uintx, G1EvacuationFailureALotInterval, 5, \
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308 "Total collections between forced triggering of evacuation " \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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309 "failures") \
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310 \
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311 develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
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312 "Force use of evacuation failure handling during evacuation " \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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313 "pauses when marking is in progress") \
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314 \
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315 develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
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316 "Force use of evacuation failure handling during initial mark " \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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317 "evacuation pauses") \
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318 \
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319 develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
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320 "Force use of evacuation failure handling during young " \
c9814fadeb38 7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
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321 "evacuation pauses") \
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322 \
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323 develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
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324 "Force use of evacuation failure handling during mixed " \
10373
3a4805ad0005 8015244: G1: Verification after a full GC is incorrectly placed.
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325 "evacuation pauses") \
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326 \
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327 diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \
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328 "If true, perform verification of each heap region's " \
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329 "remembered set when verifying the heap during a full GC.") \
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330 \
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331 diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \
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332 "Verify the code root lists attached to each heap region.") \
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333 \
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334 develop(bool, G1VerifyBitmaps, false, \
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335 "Verifies the consistency of the marking bitmaps")
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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336
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337 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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338
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339 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP