1 /* 2 * Copyright (c) 2015, 2018, 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 ZGCName = "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 // Page types 44 const uint8_t ZPageTypeSmall = 0; 45 const uint8_t ZPageTypeMedium = 1; 46 const uint8_t ZPageTypeLarge = 2; 47 48 // Page size shifts 49 const size_t ZPageSizeSmallShift = ZPlatformPageSizeSmallShift; 50 const size_t ZPageSizeMediumShift = ZPageSizeSmallShift + 4; 51 const size_t ZPageSizeMinShift = ZPageSizeSmallShift; 52 53 // Page sizes 54 const size_t ZPageSizeSmall = (size_t)1 << ZPageSizeSmallShift; 55 const size_t ZPageSizeMedium = (size_t)1 << ZPageSizeMediumShift; 56 const size_t ZPageSizeMin = (size_t)1 << ZPageSizeMinShift; 57 58 // Object size limits 59 const size_t ZObjectSizeLimitSmall = (ZPageSizeSmall / 8); // Allow 12.5% waste 60 const size_t ZObjectSizeLimitMedium = (ZPageSizeMedium / 8); // Allow 12.5% waste 61 62 // Object alignment shifts 63 extern const int& ZObjectAlignmentSmallShift; 64 const int ZObjectAlignmentMediumShift = ZPageSizeMediumShift - 13; // 8192 objects per page 65 const int ZObjectAlignmentLargeShift = ZPageSizeSmallShift; 66 67 // Object alignments 68 extern const int& ZObjectAlignmentSmall; 69 const int ZObjectAlignmentMedium = 1 << ZObjectAlignmentMediumShift; 70 const int ZObjectAlignmentLarge = 1 << ZObjectAlignmentLargeShift; 71 72 // Pointer part of address 73 const uintptr_t ZAddressOffsetShift = 0; 74 const uintptr_t ZAddressOffsetBits = ZPlatformAddressOffsetBits; 75 const uintptr_t ZAddressOffsetMask = (((uintptr_t)1 << ZAddressOffsetBits) - 1) << ZAddressOffsetShift; 76 const size_t ZAddressOffsetMax = (uintptr_t)1 << ZAddressOffsetBits; 77 78 // Metadata part of address 79 const uintptr_t ZAddressMetadataShift = ZPlatformAddressMetadataShift; 80 const uintptr_t ZAddressMetadataBits = 4; 81 const uintptr_t ZAddressMetadataMask = (((uintptr_t)1 << ZAddressMetadataBits) - 1) << ZAddressMetadataShift; 82 83 // Metadata types 84 const uintptr_t ZAddressMetadataMarked0 = (uintptr_t)1 << (ZAddressMetadataShift + 0); 85 const uintptr_t ZAddressMetadataMarked1 = (uintptr_t)1 << (ZAddressMetadataShift + 1); 86 const uintptr_t ZAddressMetadataRemapped = (uintptr_t)1 << (ZAddressMetadataShift + 2); 87 const uintptr_t ZAddressMetadataFinalizable = (uintptr_t)1 << (ZAddressMetadataShift + 3); 88 89 // Address space start/end/size 90 const uintptr_t ZAddressSpaceStart = ZPlatformAddressSpaceStart; 91 const uintptr_t ZAddressSpaceSize = ZPlatformAddressSpaceSize; 92 const uintptr_t ZAddressSpaceEnd = ZAddressSpaceStart + ZAddressSpaceSize; 93 94 // Cache line size 95 const size_t ZCacheLineSize = ZPlatformCacheLineSize; 96 97 // Reserved start/end 98 uintptr_t ZAddressReservedStart(); 99 uintptr_t ZAddressReservedEnd(); 100 101 // 102 // Good/Bad mask states 103 // -------------------- 104 // 105 // GoodMask BadMask WeakGoodMask WeakBadMask 106 // -------------------------------------------------------------- 107 // Marked0 001 110 101 010 108 // Marked1 010 101 110 001 109 // Remapped 100 011 100 011 110 // 111 112 // Good/bad masks 113 extern uintptr_t ZAddressGoodMask; 114 extern uintptr_t ZAddressBadMask; 115 extern uintptr_t ZAddressWeakBadMask; 116 117 // Marked state 118 extern uintptr_t ZAddressMetadataMarked; 119 120 // Address space for mark stack allocations 121 const size_t ZMarkStackSpaceSizeShift = 40; // 1TB 122 const size_t ZMarkStackSpaceSize = (size_t)1 << ZMarkStackSpaceSizeShift; 123 const uintptr_t ZMarkStackSpaceStart = ZAddressSpaceEnd + ZMarkStackSpaceSize; 124 const uintptr_t ZMarkStackSpaceEnd = ZMarkStackSpaceStart + ZMarkStackSpaceSize; 125 const size_t ZMarkStackSpaceExpandSize = (size_t)1 << 25; // 32M 126 127 // Mark stack and magazine sizes 128 const size_t ZMarkStackSizeShift = 11; // 2K 129 const size_t ZMarkStackSize = (size_t)1 << ZMarkStackSizeShift; 130 const size_t ZMarkStackHeaderSize = (size_t)1 << 4; // 16B 131 const size_t ZMarkStackSlots = (ZMarkStackSize - ZMarkStackHeaderSize) / sizeof(uintptr_t); 132 const size_t ZMarkStackMagazineSize = (size_t)1 << 15; // 32K 133 const size_t ZMarkStackMagazineSlots = (ZMarkStackMagazineSize / ZMarkStackSize) - 1; 134 135 // Mark stripe size 136 const size_t ZMarkStripeShift = ZPageSizeMinShift; 137 138 // Max number of mark stripes 139 const size_t ZMarkStripesMax = 16; // Must be a power of two 140 141 // Mark cache size 142 const size_t ZMarkCacheSize = 1024; // Must be a power of two 143 144 // Partial array minimum size 145 const size_t ZMarkPartialArrayMinSizeShift = 12; // 4K 146 const size_t ZMarkPartialArrayMinSize = (size_t)1 << ZMarkPartialArrayMinSizeShift; 147 148 // Max number of proactive/terminate flush attempts 149 const size_t ZMarkProactiveFlushMax = 10; 150 const size_t ZMarkTerminateFlushMax = 3; 151 152 // Try complete mark timeout 153 const uint64_t ZMarkCompleteTimeout = 1; // ms 154 155 #endif // SHARE_GC_Z_ZGLOBALS_HPP 156