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/*
* Copyright (c) 2015, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#ifndef SHARE_GC_Z_ZGLOBALS_HPP
#define SHARE_GC_Z_ZGLOBALS_HPP
#include "utilities/globalDefinitions.hpp"
#include "utilities/macros.hpp"
#include CPU_HEADER(gc/z/zGlobals)
// Collector name
const char* const ZName = "The Z Garbage Collector";
// Global phase state
extern uint32_t ZGlobalPhase;
const uint32_t ZPhaseMark = 0;
const uint32_t ZPhaseMarkCompleted = 1;
const uint32_t ZPhaseRelocate = 2;
const char* ZGlobalPhaseToString();
// Global sequence number
extern uint32_t ZGlobalSeqNum;
// Granule shift/size
const size_t ZGranuleSizeShift = 21; // 2MB
const size_t ZGranuleSize = (size_t)1 << ZGranuleSizeShift;
// Number of heap views
const size_t ZHeapViews = ZPlatformHeapViews;
// Virtual memory to physical memory ratio
const size_t ZVirtualToPhysicalRatio = 16; // 16:1
// Page types
const uint8_t ZPageTypeSmall = 0;
const uint8_t ZPageTypeMedium = 1;
const uint8_t ZPageTypeLarge = 2;
// Page size shifts
const size_t ZPageSizeSmallShift = ZGranuleSizeShift;
extern size_t ZPageSizeMediumShift;
// Page sizes
const size_t ZPageSizeSmall = (size_t)1 << ZPageSizeSmallShift;
extern size_t ZPageSizeMedium;
// Object size limits
const size_t ZObjectSizeLimitSmall = ZPageSizeSmall / 8; // 12.5% max waste
extern size_t ZObjectSizeLimitMedium;
// Object alignment shifts
extern const int& ZObjectAlignmentSmallShift;
extern int ZObjectAlignmentMediumShift;
const int ZObjectAlignmentLargeShift = ZGranuleSizeShift;
// Object alignments
extern const int& ZObjectAlignmentSmall;
extern int ZObjectAlignmentMedium;
const int ZObjectAlignmentLarge = 1 << ZObjectAlignmentLargeShift;
//
// Good/Bad mask states
// --------------------
//
// GoodMask BadMask WeakGoodMask WeakBadMask
// --------------------------------------------------------------
// Marked0 001 110 101 010
// Marked1 010 101 110 001
// Remapped 100 011 100 011
//
// Good/bad masks
extern uintptr_t ZAddressGoodMask;
extern uintptr_t ZAddressBadMask;
extern uintptr_t ZAddressWeakBadMask;
// The bad mask is 64 bit. Its high order 32 bits contain all possible value combinations
// that this mask will have. Therefore, the memory where the 32 high order bits are stored,
// can be used as a 32 bit GC epoch counter, that has a different bit pattern every time
// the bad mask is flipped. This provides a pointer to said 32 bits.
extern uint32_t* ZAddressBadMaskHighOrderBitsAddr;
const int ZAddressBadMaskHighOrderBitsOffset = LITTLE_ENDIAN_ONLY(4) BIG_ENDIAN_ONLY(0);
// Pointer part of address
extern size_t ZAddressOffsetBits;
const size_t ZAddressOffsetShift = 0;
extern uintptr_t ZAddressOffsetMask;
extern size_t ZAddressOffsetMax;
// Metadata part of address
const size_t ZAddressMetadataBits = 4;
extern size_t ZAddressMetadataShift;
extern uintptr_t ZAddressMetadataMask;
// Metadata types
extern uintptr_t ZAddressMetadataMarked;
extern uintptr_t ZAddressMetadataMarked0;
extern uintptr_t ZAddressMetadataMarked1;
extern uintptr_t ZAddressMetadataRemapped;
extern uintptr_t ZAddressMetadataFinalizable;
// Cache line size
const size_t ZCacheLineSize = ZPlatformCacheLineSize;
#define ZCACHE_ALIGNED ATTRIBUTE_ALIGNED(ZCacheLineSize)
// Mark stack space
extern uintptr_t ZMarkStackSpaceStart;
const size_t ZMarkStackSpaceExpandSize = (size_t)1 << 25; // 32M
// Mark stack and magazine sizes
const size_t ZMarkStackSizeShift = 11; // 2K
const size_t ZMarkStackSize = (size_t)1 << ZMarkStackSizeShift;
const size_t ZMarkStackHeaderSize = (size_t)1 << 4; // 16B
const size_t ZMarkStackSlots = (ZMarkStackSize - ZMarkStackHeaderSize) / sizeof(uintptr_t);
const size_t ZMarkStackMagazineSize = (size_t)1 << 15; // 32K
const size_t ZMarkStackMagazineSlots = (ZMarkStackMagazineSize / ZMarkStackSize) - 1;
// Mark stripe size
const size_t ZMarkStripeShift = ZGranuleSizeShift;
// Max number of mark stripes
const size_t ZMarkStripesMax = 16; // Must be a power of two
// Mark cache size
const size_t ZMarkCacheSize = 1024; // Must be a power of two
// Partial array minimum size
const size_t ZMarkPartialArrayMinSizeShift = 12; // 4K
const size_t ZMarkPartialArrayMinSize = (size_t)1 << ZMarkPartialArrayMinSizeShift;
// Max number of proactive/terminate flush attempts
const size_t ZMarkProactiveFlushMax = 10;
const size_t ZMarkTerminateFlushMax = 3;
// Try complete mark timeout
const uint64_t ZMarkCompleteTimeout = 200; // us
#endif // SHARE_GC_Z_ZGLOBALS_HPP
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