1 /* 2 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZGLOBALS_HPP 25 #define SHARE_GC_Z_ZGLOBALS_HPP 26 27 #include "utilities/globalDefinitions.hpp" 28 #include "utilities/macros.hpp" 29 #include OS_CPU_HEADER(gc/z/zGlobals) 30 31 // Collector name 32 const char* const ZName = "The Z Garbage Collector"; 33 34 // Global phase state 35 extern uint32_t ZGlobalPhase; 36 const uint32_t ZPhaseMark = 0; 37 const uint32_t ZPhaseMarkCompleted = 1; 38 const uint32_t ZPhaseRelocate = 2; 39 40 // Global sequence number 41 extern uint32_t ZGlobalSeqNum; 42 43 // Granule shift/size 44 const size_t ZGranuleSizeShift = ZPlatformGranuleSizeShift; 45 const size_t ZGranuleSize = (size_t)1 << ZGranuleSizeShift; 46 47 // Max heap size shift/size 48 const size_t ZMaxHeapSizeShift = ZPlatformMaxHeapSizeShift; 49 const size_t ZMaxHeapSize = (size_t)1 << ZMaxHeapSizeShift; 50 51 // Page types 52 const uint8_t ZPageTypeSmall = 0; 53 const uint8_t ZPageTypeMedium = 1; 54 const uint8_t ZPageTypeLarge = 2; 55 56 // Page size shifts 57 const size_t ZPageSizeSmallShift = ZGranuleSizeShift; 58 const size_t ZPageSizeMediumShift = ZPageSizeSmallShift + 4; 59 60 // Page sizes 61 const size_t ZPageSizeSmall = (size_t)1 << ZPageSizeSmallShift; 62 const size_t ZPageSizeMedium = (size_t)1 << ZPageSizeMediumShift; 63 64 // Object size limits 65 const size_t ZObjectSizeLimitSmall = (ZPageSizeSmall / 8); // Allow 12.5% waste 66 const size_t ZObjectSizeLimitMedium = (ZPageSizeMedium / 8); // Allow 12.5% waste 67 68 // Object alignment shifts 69 extern const int& ZObjectAlignmentSmallShift; 70 const int ZObjectAlignmentMediumShift = ZPageSizeMediumShift - 13; // 8192 objects per page 71 const int ZObjectAlignmentLargeShift = ZPageSizeSmallShift; 72 73 // Object alignments 74 extern const int& ZObjectAlignmentSmall; 75 const int ZObjectAlignmentMedium = 1 << ZObjectAlignmentMediumShift; 76 const int ZObjectAlignmentLarge = 1 << ZObjectAlignmentLargeShift; 77 78 // 79 // Good/Bad mask states 80 // -------------------- 81 // 82 // GoodMask BadMask WeakGoodMask WeakBadMask 83 // -------------------------------------------------------------- 84 // Marked0 001 110 101 010 85 // Marked1 010 101 110 001 86 // Remapped 100 011 100 011 87 // 88 89 // Good/bad masks 90 extern uintptr_t ZAddressGoodMask; 91 extern uintptr_t ZAddressBadMask; 92 extern uintptr_t ZAddressWeakBadMask; 93 94 // Pointer base address 95 extern uintptr_t ZAddressBase; 96 97 // Pointer part of address 98 extern size_t ZAddressOffsetBits; 99 const size_t ZAddressOffsetShift = 0; 100 extern uintptr_t ZAddressOffsetMask; 101 extern size_t ZAddressOffsetMax; 102 103 // Metadata part of address 104 const size_t ZAddressMetadataBits = 4; 105 extern size_t ZAddressMetadataShift; 106 extern uintptr_t ZAddressMetadataMask; 107 108 // Metadata types 109 extern uintptr_t ZAddressMetadataMarked; 110 extern uintptr_t ZAddressMetadataMarked0; 111 extern uintptr_t ZAddressMetadataMarked1; 112 extern uintptr_t ZAddressMetadataRemapped; 113 extern uintptr_t ZAddressMetadataFinalizable; 114 115 // Address space start/end/size 116 extern uintptr_t ZAddressSpaceStart; 117 extern uintptr_t ZAddressSpaceEnd; 118 extern size_t ZAddressSpaceSize; 119 120 // Reserved space start/end 121 extern uintptr_t ZAddressReservedStart; 122 extern uintptr_t ZAddressReservedEnd; 123 extern size_t ZAddressReservedSize; 124 125 // NMethod entry barrier 126 const size_t ZNMethodDisarmedOffset = ZPlatformNMethodDisarmedOffset; 127 128 // Cache line size 129 const size_t ZCacheLineSize = ZPlatformCacheLineSize; 130 131 // Mark stack space 132 extern uintptr_t ZMarkStackSpaceStart; 133 const size_t ZMarkStackSpaceExpandSize = (size_t)1 << 25; // 32M 134 135 // Mark stack and magazine sizes 136 const size_t ZMarkStackSizeShift = 11; // 2K 137 const size_t ZMarkStackSize = (size_t)1 << ZMarkStackSizeShift; 138 const size_t ZMarkStackHeaderSize = (size_t)1 << 4; // 16B 139 const size_t ZMarkStackSlots = (ZMarkStackSize - ZMarkStackHeaderSize) / sizeof(uintptr_t); 140 const size_t ZMarkStackMagazineSize = (size_t)1 << 15; // 32K 141 const size_t ZMarkStackMagazineSlots = (ZMarkStackMagazineSize / ZMarkStackSize) - 1; 142 143 // Mark stripe size 144 const size_t ZMarkStripeShift = ZGranuleSizeShift; 145 146 // Max number of mark stripes 147 const size_t ZMarkStripesMax = 16; // Must be a power of two 148 149 // Mark cache size 150 const size_t ZMarkCacheSize = 1024; // Must be a power of two 151 152 // Partial array minimum size 153 const size_t ZMarkPartialArrayMinSizeShift = 12; // 4K 154 const size_t ZMarkPartialArrayMinSize = (size_t)1 << ZMarkPartialArrayMinSizeShift; 155 156 // Max number of proactive/terminate flush attempts 157 const size_t ZMarkProactiveFlushMax = 10; 158 const size_t ZMarkTerminateFlushMax = 3; 159 160 // Try complete mark timeout 161 const uint64_t ZMarkCompleteTimeout = 1; // ms 162 163 #endif // SHARE_GC_Z_ZGLOBALS_HPP 164