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 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 // Granule shift/size 44 const size_t ZGranuleSizeShift = ZPlatformGranuleSizeShift; 45 const size_t ZGranuleSize = (size_t)1 << ZGranuleSizeShift; 46 47 // Page types 48 const uint8_t ZPageTypeSmall = 0; 49 const uint8_t ZPageTypeMedium = 1; 50 const uint8_t ZPageTypeLarge = 2; 51 52 // Page size shifts 53 const size_t ZPageSizeSmallShift = ZGranuleSizeShift; 54 const size_t ZPageSizeMediumShift = ZPageSizeSmallShift + 4; 55 56 // Page sizes 57 const size_t ZPageSizeSmall = (size_t)1 << ZPageSizeSmallShift; 58 const size_t ZPageSizeMedium = (size_t)1 << ZPageSizeMediumShift; 59 60 // Object size limits 61 const size_t ZObjectSizeLimitSmall = (ZPageSizeSmall / 8); // Allow 12.5% waste 62 const size_t ZObjectSizeLimitMedium = (ZPageSizeMedium / 8); // Allow 12.5% waste 63 64 // Object alignment shifts 65 extern const int& ZObjectAlignmentSmallShift; 66 const int ZObjectAlignmentMediumShift = ZPageSizeMediumShift - 13; // 8192 objects per page 67 const int ZObjectAlignmentLargeShift = ZPageSizeSmallShift; 68 69 // Object alignments 70 extern const int& ZObjectAlignmentSmall; 71 const int ZObjectAlignmentMedium = 1 << ZObjectAlignmentMediumShift; 72 const int ZObjectAlignmentLarge = 1 << ZObjectAlignmentLargeShift; 73 74 // Pointer part of address 75 const uintptr_t ZAddressOffsetShift = 0; 76 const uintptr_t ZAddressOffsetBits = ZPlatformAddressOffsetBits; 77 const uintptr_t ZAddressOffsetMask = (((uintptr_t)1 << ZAddressOffsetBits) - 1) << ZAddressOffsetShift; 78 const size_t ZAddressOffsetMax = (uintptr_t)1 << ZAddressOffsetBits; 79 80 // Metadata part of address 81 const uintptr_t ZAddressMetadataShift = ZPlatformAddressMetadataShift; 82 const uintptr_t ZAddressMetadataBits = 4; 83 const uintptr_t ZAddressMetadataMask = (((uintptr_t)1 << ZAddressMetadataBits) - 1) << ZAddressMetadataShift; 84 85 // Metadata types 86 const uintptr_t ZAddressMetadataMarked0 = (uintptr_t)1 << (ZAddressMetadataShift + 0); 87 const uintptr_t ZAddressMetadataMarked1 = (uintptr_t)1 << (ZAddressMetadataShift + 1); 88 const uintptr_t ZAddressMetadataRemapped = (uintptr_t)1 << (ZAddressMetadataShift + 2); 89 const uintptr_t ZAddressMetadataFinalizable = (uintptr_t)1 << (ZAddressMetadataShift + 3); 90 91 // Address space start/end/size 92 const uintptr_t ZAddressSpaceStart = ZPlatformAddressSpaceStart; 93 const uintptr_t ZAddressSpaceSize = ZPlatformAddressSpaceSize; 94 const uintptr_t ZAddressSpaceEnd = ZAddressSpaceStart + ZAddressSpaceSize; 95 96 // NMethod entry barrier 97 const size_t ZNMethodDisarmedOffset = ZPlatformNMethodDisarmedOffset; 98 99 // Cache line size 100 const size_t ZCacheLineSize = ZPlatformCacheLineSize; 101 102 // Reserved start/end 103 uintptr_t ZAddressReservedStart(); 104 uintptr_t ZAddressReservedEnd(); 105 106 // 107 // Good/Bad mask states 108 // -------------------- 109 // 110 // GoodMask BadMask WeakGoodMask WeakBadMask 111 // -------------------------------------------------------------- 112 // Marked0 001 110 101 010 113 // Marked1 010 101 110 001 114 // Remapped 100 011 100 011 115 // 116 117 // Good/bad masks 118 extern uintptr_t ZAddressGoodMask; 119 extern uintptr_t ZAddressBadMask; 120 extern uintptr_t ZAddressWeakBadMask; 121 122 // Marked state 123 extern uintptr_t ZAddressMetadataMarked; 124 125 // Mark stack space 126 extern uintptr_t ZMarkStackSpaceStart; 127 const size_t ZMarkStackSpaceExpandSize = (size_t)1 << 25; // 32M 128 129 // Mark stack and magazine sizes 130 const size_t ZMarkStackSizeShift = 11; // 2K 131 const size_t ZMarkStackSize = (size_t)1 << ZMarkStackSizeShift; 132 const size_t ZMarkStackHeaderSize = (size_t)1 << 4; // 16B 133 const size_t ZMarkStackSlots = (ZMarkStackSize - ZMarkStackHeaderSize) / sizeof(uintptr_t); 134 const size_t ZMarkStackMagazineSize = (size_t)1 << 15; // 32K 135 const size_t ZMarkStackMagazineSlots = (ZMarkStackMagazineSize / ZMarkStackSize) - 1; 136 137 // Mark stripe size 138 const size_t ZMarkStripeShift = ZGranuleSizeShift; 139 140 // Max number of mark stripes 141 const size_t ZMarkStripesMax = 16; // Must be a power of two 142 143 // Mark cache size 144 const size_t ZMarkCacheSize = 1024; // Must be a power of two 145 146 // Partial array minimum size 147 const size_t ZMarkPartialArrayMinSizeShift = 12; // 4K 148 const size_t ZMarkPartialArrayMinSize = (size_t)1 << ZMarkPartialArrayMinSizeShift; 149 150 // Max number of proactive/terminate flush attempts 151 const size_t ZMarkProactiveFlushMax = 10; 152 const size_t ZMarkTerminateFlushMax = 3; 153 154 // Try complete mark timeout 155 const uint64_t ZMarkCompleteTimeout = 1; // ms 156 157 #endif // SHARE_GC_Z_ZGLOBALS_HPP