1 /* |
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2 * Copyright (c) 2015, 2018, 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 #include "precompiled.hpp" |
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26 #include "gc/g1/heapRegionBounds.inline.hpp" |
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27 #include "runtime/commandLineFlagRangeList.hpp" |
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28 #include "runtime/globals_extension.hpp" |
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29 #include "utilities/globalDefinitions.hpp" |
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30 |
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31 Flag::Error G1RSetRegionEntriesConstraintFunc(intx value, bool verbose) { |
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32 if (!UseG1GC) return Flag::SUCCESS; |
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33 |
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34 // Default value of G1RSetRegionEntries=0 means will be set ergonomically. |
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35 // Minimum value is 1. |
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36 if (FLAG_IS_CMDLINE(G1RSetRegionEntries) && (value < 1)) { |
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37 CommandLineError::print(verbose, |
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38 "G1RSetRegionEntries (" INTX_FORMAT ") must be " |
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39 "greater than or equal to 1\n", |
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40 value); |
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41 return Flag::VIOLATES_CONSTRAINT; |
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42 } else { |
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43 return Flag::SUCCESS; |
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44 } |
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45 } |
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46 |
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47 Flag::Error G1RSetSparseRegionEntriesConstraintFunc(intx value, bool verbose) { |
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48 if (!UseG1GC) return Flag::SUCCESS; |
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49 |
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50 // Default value of G1RSetSparseRegionEntries=0 means will be set ergonomically. |
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51 // Minimum value is 1. |
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52 if (FLAG_IS_CMDLINE(G1RSetSparseRegionEntries) && (value < 1)) { |
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53 CommandLineError::print(verbose, |
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54 "G1RSetSparseRegionEntries (" INTX_FORMAT ") must be " |
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55 "greater than or equal to 1\n", |
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56 value); |
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57 return Flag::VIOLATES_CONSTRAINT; |
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58 } else { |
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59 return Flag::SUCCESS; |
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60 } |
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61 } |
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62 |
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63 Flag::Error G1HeapRegionSizeConstraintFunc(size_t value, bool verbose) { |
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64 if (!UseG1GC) return Flag::SUCCESS; |
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65 |
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66 // Default value of G1HeapRegionSize=0 means will be set ergonomically. |
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67 if (FLAG_IS_CMDLINE(G1HeapRegionSize) && (value < HeapRegionBounds::min_size())) { |
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68 CommandLineError::print(verbose, |
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69 "G1HeapRegionSize (" SIZE_FORMAT ") must be " |
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70 "greater than or equal to ergonomic heap region minimum size\n", |
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71 value); |
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72 return Flag::VIOLATES_CONSTRAINT; |
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73 } else { |
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74 return Flag::SUCCESS; |
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75 } |
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76 } |
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77 |
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78 Flag::Error G1NewSizePercentConstraintFunc(uintx value, bool verbose) { |
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79 if (!UseG1GC) return Flag::SUCCESS; |
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80 |
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81 if (value > G1MaxNewSizePercent) { |
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82 CommandLineError::print(verbose, |
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83 "G1NewSizePercent (" UINTX_FORMAT ") must be " |
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84 "less than or equal to G1MaxNewSizePercent (" UINTX_FORMAT ")\n", |
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85 value, G1MaxNewSizePercent); |
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86 return Flag::VIOLATES_CONSTRAINT; |
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87 } else { |
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88 return Flag::SUCCESS; |
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89 } |
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90 } |
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91 |
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92 Flag::Error G1MaxNewSizePercentConstraintFunc(uintx value, bool verbose) { |
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93 if (!UseG1GC) return Flag::SUCCESS; |
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94 |
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95 if (value < G1NewSizePercent) { |
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96 CommandLineError::print(verbose, |
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97 "G1MaxNewSizePercent (" UINTX_FORMAT ") must be " |
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98 "greater than or equal to G1NewSizePercent (" UINTX_FORMAT ")\n", |
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99 value, G1NewSizePercent); |
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100 return Flag::VIOLATES_CONSTRAINT; |
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101 } else { |
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102 return Flag::SUCCESS; |
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103 } |
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104 } |
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105 |
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106 Flag::Error MaxGCPauseMillisConstraintFuncG1(uintx value, bool verbose) { |
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107 if (UseG1GC && FLAG_IS_CMDLINE(MaxGCPauseMillis) && (value >= GCPauseIntervalMillis)) { |
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108 CommandLineError::print(verbose, |
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109 "MaxGCPauseMillis (" UINTX_FORMAT ") must be " |
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110 "less than GCPauseIntervalMillis (" UINTX_FORMAT ")\n", |
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111 value, GCPauseIntervalMillis); |
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112 return Flag::VIOLATES_CONSTRAINT; |
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113 } |
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114 |
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115 return Flag::SUCCESS; |
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116 } |
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117 |
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118 Flag::Error GCPauseIntervalMillisConstraintFuncG1(uintx value, bool verbose) { |
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119 if (UseG1GC) { |
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120 if (FLAG_IS_CMDLINE(GCPauseIntervalMillis)) { |
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121 if (value < 1) { |
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122 CommandLineError::print(verbose, |
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123 "GCPauseIntervalMillis (" UINTX_FORMAT ") must be " |
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124 "greater than or equal to 1\n", |
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125 value); |
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126 return Flag::VIOLATES_CONSTRAINT; |
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127 } |
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128 |
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129 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { |
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130 CommandLineError::print(verbose, |
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131 "GCPauseIntervalMillis cannot be set " |
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132 "without setting MaxGCPauseMillis\n"); |
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133 return Flag::VIOLATES_CONSTRAINT; |
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134 } |
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135 |
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136 if (value <= MaxGCPauseMillis) { |
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137 CommandLineError::print(verbose, |
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138 "GCPauseIntervalMillis (" UINTX_FORMAT ") must be " |
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139 "greater than MaxGCPauseMillis (" UINTX_FORMAT ")\n", |
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140 value, MaxGCPauseMillis); |
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141 return Flag::VIOLATES_CONSTRAINT; |
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142 } |
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143 } |
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144 } |
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145 |
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146 return Flag::SUCCESS; |
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147 } |
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148 |
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149 Flag::Error NewSizeConstraintFuncG1(size_t value, bool verbose) { |
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150 #ifdef _LP64 |
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151 // Overflow would happen for uint type variable of YoungGenSizer::_min_desired_young_length |
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152 // when the value to be assigned exceeds uint range. |
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153 // i.e. result of '(uint)(NewSize / region size(1~32MB))' |
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154 // So maximum of NewSize should be 'max_juint * 1M' |
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155 if (UseG1GC && (value > (max_juint * 1 * M))) { |
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156 CommandLineError::print(verbose, |
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157 "NewSize (" SIZE_FORMAT ") must be less than ergonomic maximum value\n", |
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158 value); |
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159 return Flag::VIOLATES_CONSTRAINT; |
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160 } |
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161 #endif // _LP64 |
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162 return Flag::SUCCESS; |
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163 } |
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164 |
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165 size_t MaxSizeForHeapAlignmentG1() { |
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166 return HeapRegionBounds::max_size(); |
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167 } |
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