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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 #ifndef SHARE_GC_Z_ZGLOBALS_HPP |
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25 #define SHARE_GC_Z_ZGLOBALS_HPP |
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26 |
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27 #include "utilities/globalDefinitions.hpp" |
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28 #include "utilities/macros.hpp" |
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29 #include OS_CPU_HEADER(gc/z/zGlobals) |
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30 |
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31 // Collector name |
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32 const char* const ZGCName = "The Z Garbage Collector"; |
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33 |
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34 // Global phase state |
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35 extern uint32_t ZGlobalPhase; |
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36 const uint32_t ZPhaseMark = 0; |
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37 const uint32_t ZPhaseMarkCompleted = 1; |
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38 const uint32_t ZPhaseRelocate = 2; |
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39 |
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40 // Global sequence number |
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41 extern uint32_t ZGlobalSeqNum; |
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42 |
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43 // Page types |
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44 const uint8_t ZPageTypeSmall = 0; |
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45 const uint8_t ZPageTypeMedium = 1; |
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46 const uint8_t ZPageTypeLarge = 2; |
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47 |
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48 // Page size shifts |
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49 const size_t ZPageSizeSmallShift = ZPlatformPageSizeSmallShift; |
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50 const size_t ZPageSizeMediumShift = ZPageSizeSmallShift + 4; |
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51 const size_t ZPageSizeMinShift = ZPageSizeSmallShift; |
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52 |
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53 // Page sizes |
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54 const size_t ZPageSizeSmall = (size_t)1 << ZPageSizeSmallShift; |
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55 const size_t ZPageSizeMedium = (size_t)1 << ZPageSizeMediumShift; |
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56 const size_t ZPageSizeMin = (size_t)1 << ZPageSizeMinShift; |
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57 |
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58 // Object size limits |
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59 const size_t ZObjectSizeLimitSmall = (ZPageSizeSmall / 8); // Allow 12.5% waste |
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60 const size_t ZObjectSizeLimitMedium = (ZPageSizeMedium / 8); // Allow 12.5% waste |
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61 |
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62 // Object alignment shifts |
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63 extern const int& ZObjectAlignmentSmallShift; |
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64 const int ZObjectAlignmentMediumShift = ZPageSizeMediumShift - 13; // 8192 objects per page |
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65 const int ZObjectAlignmentLargeShift = ZPageSizeSmallShift; |
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66 |
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67 // Object alignments |
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68 extern const int& ZObjectAlignmentSmall; |
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69 const int ZObjectAlignmentMedium = 1 << ZObjectAlignmentMediumShift; |
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70 const int ZObjectAlignmentLarge = 1 << ZObjectAlignmentLargeShift; |
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71 |
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72 // Pointer part of address |
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73 const uintptr_t ZAddressOffsetShift = 0; |
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74 const uintptr_t ZAddressOffsetBits = ZPlatformAddressOffsetBits; |
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75 const uintptr_t ZAddressOffsetMask = (((uintptr_t)1 << ZAddressOffsetBits) - 1) << ZAddressOffsetShift; |
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76 const size_t ZAddressOffsetMax = (uintptr_t)1 << ZAddressOffsetBits; |
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77 |
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78 // Metadata part of address |
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79 const uintptr_t ZAddressMetadataShift = ZPlatformAddressMetadataShift; |
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80 const uintptr_t ZAddressMetadataBits = 4; |
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81 const uintptr_t ZAddressMetadataMask = (((uintptr_t)1 << ZAddressMetadataBits) - 1) << ZAddressMetadataShift; |
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82 |
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83 // Metadata types |
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84 const uintptr_t ZAddressMetadataMarked0 = (uintptr_t)1 << (ZAddressMetadataShift + 0); |
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85 const uintptr_t ZAddressMetadataMarked1 = (uintptr_t)1 << (ZAddressMetadataShift + 1); |
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86 const uintptr_t ZAddressMetadataRemapped = (uintptr_t)1 << (ZAddressMetadataShift + 2); |
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87 const uintptr_t ZAddressMetadataFinalizable = (uintptr_t)1 << (ZAddressMetadataShift + 3); |
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88 |
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89 // Address space start/end/size |
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90 const uintptr_t ZAddressSpaceStart = ZPlatformAddressSpaceStart; |
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91 const uintptr_t ZAddressSpaceSize = ZPlatformAddressSpaceSize; |
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92 const uintptr_t ZAddressSpaceEnd = ZAddressSpaceStart + ZAddressSpaceSize; |
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93 |
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94 // Cache line size |
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95 const size_t ZCacheLineSize = ZPlatformCacheLineSize; |
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96 |
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97 // Reserved start/end |
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98 uintptr_t ZAddressReservedStart(); |
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99 uintptr_t ZAddressReservedEnd(); |
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100 |
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101 // |
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102 // Good/Bad mask states |
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103 // -------------------- |
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104 // |
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105 // GoodMask BadMask WeakGoodMask WeakBadMask |
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106 // -------------------------------------------------------------- |
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107 // Marked0 001 110 101 010 |
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108 // Marked1 010 101 110 001 |
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109 // Remapped 100 011 100 011 |
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110 // |
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111 |
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112 // Good/bad masks |
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113 extern uintptr_t ZAddressGoodMask; |
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114 extern uintptr_t ZAddressBadMask; |
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115 extern uintptr_t ZAddressWeakBadMask; |
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116 |
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117 // Marked state |
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118 extern uintptr_t ZAddressMetadataMarked; |
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119 |
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120 // Address space for mark stack allocations |
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121 const size_t ZMarkStackSpaceSizeShift = 40; // 1TB |
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122 const size_t ZMarkStackSpaceSize = (size_t)1 << ZMarkStackSpaceSizeShift; |
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123 const uintptr_t ZMarkStackSpaceStart = ZAddressSpaceEnd + ZMarkStackSpaceSize; |
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124 const uintptr_t ZMarkStackSpaceEnd = ZMarkStackSpaceStart + ZMarkStackSpaceSize; |
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125 const size_t ZMarkStackSpaceExpandSize = (size_t)1 << 25; // 32M |
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126 |
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127 // Mark stack and magazine sizes |
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128 const size_t ZMarkStackSizeShift = 11; // 2K |
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129 const size_t ZMarkStackSize = (size_t)1 << ZMarkStackSizeShift; |
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130 const size_t ZMarkStackHeaderSize = (size_t)1 << 4; // 16B |
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131 const size_t ZMarkStackSlots = (ZMarkStackSize - ZMarkStackHeaderSize) / sizeof(uintptr_t); |
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132 const size_t ZMarkStackMagazineSize = (size_t)1 << 15; // 32K |
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133 const size_t ZMarkStackMagazineSlots = (ZMarkStackMagazineSize / ZMarkStackSize) - 1; |
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134 |
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135 // Mark stripe size |
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136 const size_t ZMarkStripeShift = ZPageSizeMinShift; |
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137 |
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138 // Max number of mark stripes |
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139 const size_t ZMarkStripesMax = 16; // Must be a power of two |
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140 |
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141 // Mark cache size |
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142 const size_t ZMarkCacheSize = 1024; // Must be a power of two |
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143 |
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144 // Partial array minimum size |
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145 const size_t ZMarkPartialArrayMinSizeShift = 12; // 4K |
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146 const size_t ZMarkPartialArrayMinSize = (size_t)1 << ZMarkPartialArrayMinSizeShift; |
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147 |
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148 // Max number of proactive/terminate flush attempts |
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149 const size_t ZMarkProactiveFlushMax = 10; |
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150 const size_t ZMarkTerminateFlushMax = 3; |
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151 |
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152 // Try complete mark timeout |
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153 const uint64_t ZMarkCompleteTimeout = 1; // ms |
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154 |
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155 #endif // SHARE_GC_Z_ZGLOBALS_HPP |