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1 /*
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2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 //
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26 // Defines all globals flags used by the garbage-first compiler.
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27 //
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28
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29 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, notproduct, manageable, product_rw) \
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30 \
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31 product(intx, ParallelGCG1AllocBufferSize, 4*K, \
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32 "Size of parallel G1 allocation buffers in to-space.") \
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33 \
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34 product(intx, G1TimeSliceMS, 500, \
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35 "Time slice for MMU specification") \
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36 \
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37 product(intx, G1MaxPauseTimeMS, 200, \
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38 "Max GC time per MMU time slice") \
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39 \
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40 product(intx, G1ConfidencePerc, 50, \
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41 "Confidence level for MMU/pause predictions") \
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42 \
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43 product(intx, G1MarkingOverheadPerc, 0, \
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44 "Overhead of concurrent marking") \
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45 \
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46 product(bool, G1AccountConcurrentOverhead, false, \
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47 "Whether soft real-time compliance in G1 will take into account" \
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48 "concurrent overhead") \
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49 \
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50 product(intx, G1YoungGenSize, 0, \
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51 "Size of the G1 young generation, 0 is the adaptive policy") \
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52 \
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53 product(bool, G1Gen, true, \
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54 "If true, it will enable the generational G1") \
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55 \
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56 develop(intx, G1GCPct, 10, \
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57 "The desired percent time spent on GC") \
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58 \
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59 product(intx, G1PolicyVerbose, 0, \
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60 "The verbosity level on G1 policy decisions") \
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61 \
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62 develop(bool, G1UseHRIntoRS, true, \
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63 "Determines whether the 'advanced' HR Into rem set is used.") \
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64 \
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65 product(bool, G1VerifyRemSet, false, \
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66 "If true, verify the rem set functioning at each GC") \
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67 \
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68 product(bool, G1VerifyConcMark, false, \
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69 "If true, verify the conc marking code at full GC time") \
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70 \
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71 develop(intx, G1MarkingVerboseLevel, 0, \
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72 "Level (0-4) of verboseness of the marking code") \
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73 \
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74 develop(bool, G1VerifyConcMarkPrintReachable, true, \
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75 "If conc mark verification fails, print reachable objects") \
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76 \
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77 develop(bool, G1TraceMarkStackOverflow, false, \
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78 "If true, extra debugging code for CM restart for ovflw.") \
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79 \
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80 product(bool, G1VerifyMarkingInEvac, false, \
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81 "If true, verify marking info during evacuation") \
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82 \
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83 develop(intx, G1PausesBtwnConcMark, -1, \
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84 "If positive, fixed number of pauses between conc markings") \
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85 \
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86 product(intx, G1EfficiencyPctCausesMark, 80, \
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87 "The cum gc efficiency since mark fall-off that causes " \
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88 "new marking") \
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89 \
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90 product(bool, TraceConcurrentMark, false, \
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91 "Trace concurrent mark") \
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92 \
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93 product(bool, SummarizeG1ConcMark, false, \
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94 "Summarize concurrent mark info") \
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95 \
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96 product(bool, SummarizeG1RSStats, false, \
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97 "Summarize remembered set processing info") \
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98 \
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99 product(bool, SummarizeG1ZFStats, false, \
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100 "Summarize zero-filling info") \
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101 \
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102 product(bool, TraceG1Refine, false, \
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103 "Trace G1 concurrent refinement") \
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104 \
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105 develop(bool, G1ConcMark, true, \
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106 "If true, run concurrent marking for G1") \
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107 \
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108 product(intx, G1CMStackSize, 2 * 1024 * 1024, \
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109 "Size of the mark stack for concurrent marking.") \
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110 \
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111 product(intx, G1CMRegionStackSize, 1024 * 1024, \
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112 "Size of the region stack for concurrent marking.") \
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113 \
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114 develop(bool, G1ConcRefine, true, \
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115 "If true, run concurrent rem set refinement for G1") \
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116 \
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117 develop(intx, G1ConcRefineTargTraversals, 4, \
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118 "Number of concurrent refinement we try to achieve") \
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119 \
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120 develop(intx, G1ConcRefineInitialDelta, 4, \
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121 "Number of heap regions of alloc ahead of starting collection " \
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122 "pause to start concurrent refinement (initially)") \
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123 \
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124 product(bool, G1SmoothConcRefine, true, \
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125 "Attempts to smooth out the overhead of concurrent refinement") \
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126 \
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127 develop(bool, G1ConcZeroFill, true, \
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128 "If true, run concurrent zero-filling thread") \
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129 \
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130 develop(intx, G1ConcZFMaxRegions, 1, \
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131 "Stop zero-filling when # of zf'd regions reaches") \
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132 \
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133 product(intx, G1SteadyStateUsed, 90, \
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134 "If non-0, try to maintain 'used' at this pct (of max)") \
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135 \
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136 product(intx, G1SteadyStateUsedDelta, 30, \
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137 "If G1SteadyStateUsed is non-0, then do pause this number of " \
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138 "of percentage points earlier if no marking is in progress.") \
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139 \
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140 develop(bool, G1SATBBarrierPrintNullPreVals, false, \
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141 "If true, count frac of ptr writes with null pre-vals.") \
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142 \
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143 product(intx, G1SATBLogBufferSize, 1*K, \
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144 "Number of entries in an SATB log buffer.") \
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145 \
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146 product(intx, G1SATBProcessCompletedThreshold, 20, \
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147 "Number of completed buffers that triggers log processing.") \
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148 \
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149 develop(intx, G1ExtraRegionSurvRate, 33, \
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150 "If the young survival rate is S, and there's room left in " \
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151 "to-space, we will allow regions whose survival rate is up to " \
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152 "S + (1 - S)*X, where X is this parameter (as a fraction.)") \
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153 \
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154 develop(intx, G1InitYoungSurvRatio, 50, \
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155 "Expected Survival Rate for newly allocated bytes") \
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156 \
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157 develop(bool, G1SATBPrintStubs, false, \
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158 "If true, print generated stubs for the SATB barrier") \
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159 \
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160 product(intx, G1ExpandByPctOfAvail, 20, \
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161 "When expanding, % of uncommitted space to claim.") \
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162 \
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163 develop(bool, G1RSBarrierRegionFilter, true, \
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164 "If true, generate region filtering code in RS barrier") \
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165 \
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166 develop(bool, G1RSBarrierNullFilter, true, \
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167 "If true, generate null-pointer filtering code in RS barrier") \
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168 \
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169 develop(bool, G1PrintCTFilterStats, false, \
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170 "If true, print stats on RS filtering effectiveness") \
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171 \
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172 develop(bool, G1RSBarrierUseQueue, true, \
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173 "If true, use queueing RS barrier") \
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174 \
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175 develop(bool, G1RSLogCheckCardTable, false, \
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176 "If true, verify that no dirty cards remain after RS log " \
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177 "processing.") \
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178 \
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179 product(intx, G1MinPausesBetweenMarks, 2, \
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180 "Number of inefficient pauses necessary to trigger marking.") \
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181 \
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182 product(intx, G1InefficientPausePct, 80, \
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183 "Threshold of an 'inefficient' pauses (as % of cum efficiency.") \
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184 \
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185 product(intx, G1RSPopLimit, 32768, \
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186 "Limit that defines popularity. Should go away! XXX") \
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187 \
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188 develop(bool, G1RSCountHisto, false, \
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189 "If true, print a histogram of RS occupancies after each pause") \
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190 \
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191 product(intx, G1ObjPopLimit, 256, \
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192 "Limit that defines popularity for an object.") \
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193 \
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194 product(bool, G1TraceFileOverwrite, false, \
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195 "Allow the trace file to be overwritten") \
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196 \
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197 develop(intx, G1PrintRegionLivenessInfo, 0, \
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198 "When > 0, print the occupancies of the <n> best and worst" \
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199 "regions.") \
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200 \
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201 develop(bool, G1TracePopularity, false, \
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202 "When true, provide detailed tracing of popularity.") \
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203 \
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204 product(bool, G1SummarizePopularity, false, \
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205 "When true, provide end-of-run-summarization of popularity.") \
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206 \
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207 product(intx, G1NumPopularRegions, 1, \
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208 "Number of regions reserved to hold popular objects. " \
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209 "Should go away later.") \
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210 \
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211 develop(bool, G1PrintParCleanupStats, false, \
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212 "When true, print extra stats about parallel cleanup.") \
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213 \
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214 product(bool, G1DoAgeCohortChecks, false, \
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215 "When true, check well-formedness of age cohort structures.") \
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216 \
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217 develop(bool, G1DisablePreBarrier, false, \
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218 "Disable generation of pre-barrier (i.e., marking barrier) ") \
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219 \
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220 develop(bool, G1DisablePostBarrier, false, \
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221 "Disable generation of post-barrier (i.e., RS barrier) ") \
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222 \
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223 product(intx, G1DirtyCardQueueMax, 30, \
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224 "Maximum number of completed RS buffers before mutator threads " \
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225 "start processing them.") \
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226 \
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227 develop(intx, G1ConcRSLogCacheSize, 10, \
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228 "Log base 2 of the length of conc RS hot-card cache.") \
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229 \
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230 product(bool, G1ConcRSCountTraversals, false, \
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231 "If true, gather data about the number of times CR traverses " \
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232 "cards ") \
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233 \
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234 product(intx, G1ConcRSHotCardLimit, 4, \
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235 "The threshold that defines (>=) a hot card.") \
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236 \
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237 develop(bool, G1PrintOopAppls, false, \
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238 "When true, print applications of closures to external locs.") \
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239 \
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240 product(intx, G1LogRSRegionEntries, 7, \
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241 "Log_2 of max number of regions for which we keep bitmaps.") \
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242 \
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243 develop(bool, G1RecordHRRSOops, false, \
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244 "When true, record recent calls to rem set operations.") \
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245 \
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246 develop(bool, G1RecordHRRSEvents, false, \
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247 "When true, record recent calls to rem set operations.") \
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248 \
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249 develop(intx, G1MaxVerifyFailures, -1, \
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250 "The maximum number of verification failrues to print. " \
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251 "-1 means print all.") \
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252 \
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253 develop(bool, G1ScrubRemSets, true, \
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254 "When true, do RS scrubbing after cleanup.") \
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255 \
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256 develop(bool, G1RSScrubVerbose, false, \
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257 "When true, do RS scrubbing with verbose output.") \
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258 \
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259 develop(bool, G1YoungSurvRateVerbose, false, \
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260 "print out the survival rate of young regions according to age.") \
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261 \
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262 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
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263 "the number of regions for which we'll print a surv rate " \
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264 "summary.") \
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265 \
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266 product(bool, G1UseScanOnlyPrefix, false, \
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267 "It determines whether the system will calculate an optimum " \
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268 "scan-only set.") \
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269 \
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270 product(intx, G1MinReservePerc, 10, \
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271 "It determines the minimum reserve we should have in the heap " \
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272 "to minimize the probability of promotion failure.") \
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273 \
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274 product(bool, G1TraceRegions, false, \
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275 "If set G1 will print information on which regions are being " \
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276 "allocated and which are reclaimed.") \
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277 \
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278 develop(bool, G1HRRSUseSparseTable, true, \
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279 "When true, use sparse table to save space.") \
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280 \
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281 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
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282 "Forces flushing of log buffers before verification.") \
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283 \
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284 product(intx, G1MaxSurvivorRegions, 0, \
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285 "The maximum number of survivor regions")
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286
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287 G1_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG)
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