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src/share/vm/gc_implementation/concurrentMarkSweep/vmStructs_cms.hpp@c96030fff130 (annotated)

src/share/vm/gc_implementation/concurrentMarkSweep/vmStructs_cms.hpp

Thu, 20 Nov 2008 16:56:09 -0800

author

ysr

date

Thu, 20 Nov 2008 16:56:09 -0800

changeset 888

c96030fff130

parent 623

c0ecab83e6f3

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa

duke@435	1	/*
duke@435	2	* Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	#define VM_STRUCTS_CMS(nonstatic_field, \
coleenp@622	26	volatile_nonstatic_field, \
duke@435	27	static_field) \
duke@435	28	nonstatic_field(CompactibleFreeListSpace, _collector, CMSCollector*) \
duke@435	29	nonstatic_field(CompactibleFreeListSpace, _bt, BlockOffsetArrayNonContigSpace) \
duke@435	30	\
duke@435	31	nonstatic_field(CMSPermGen, _gen, ConcurrentMarkSweepGeneration*) \
duke@435	32	nonstatic_field(CMSBitMap, _bmStartWord, HeapWord*) \
duke@435	33	nonstatic_field(CMSBitMap, _bmWordSize, size_t) \
duke@435	34	nonstatic_field(CMSBitMap, _shifter, const int) \
duke@435	35	nonstatic_field(CMSBitMap, _bm, BitMap) \
duke@435	36	nonstatic_field(CMSBitMap, _virtual_space, VirtualSpace) \
duke@435	37	nonstatic_field(CMSCollector, _markBitMap, CMSBitMap) \
duke@435	38	nonstatic_field(ConcurrentMarkSweepGeneration, _cmsSpace, CompactibleFreeListSpace*) \
duke@435	39	static_field(ConcurrentMarkSweepThread, _collector, CMSCollector*) \
coleenp@622	40	volatile_nonstatic_field(FreeChunk, _size, size_t) \
duke@435	41	nonstatic_field(FreeChunk, _next, FreeChunk*) \
duke@435	42	nonstatic_field(FreeChunk, _prev, FreeChunk*) \
dcubed@587	43	nonstatic_field(LinearAllocBlock, _word_size, size_t) \
dcubed@587	44	nonstatic_field(FreeList, _size, size_t) \
dcubed@587	45	nonstatic_field(FreeList, _count, ssize_t) \
dcubed@587	46	nonstatic_field(BinaryTreeDictionary, _totalSize, size_t) \
dcubed@587	47	nonstatic_field(CompactibleFreeListSpace, _dictionary, FreeBlockDictionary*) \
dcubed@587	48	nonstatic_field(CompactibleFreeListSpace, _indexedFreeList[0], FreeList) \
dcubed@587	49	nonstatic_field(CompactibleFreeListSpace, _smallLinearAllocBlock, LinearAllocBlock)
dcubed@587	50
duke@435	51
duke@435	52	#define VM_TYPES_CMS(declare_type, \
duke@435	53	declare_toplevel_type) \
duke@435	54	\
duke@435	55	declare_type(ConcurrentMarkSweepGeneration,CardGeneration) \
duke@435	56	declare_type(CompactibleFreeListSpace, CompactibleSpace) \
duke@435	57	declare_type(CMSPermGenGen, ConcurrentMarkSweepGeneration) \
duke@435	58	declare_type(CMSPermGen, PermGen) \
duke@435	59	declare_type(ConcurrentMarkSweepThread, NamedThread) \
duke@435	60	declare_type(SurrogateLockerThread, JavaThread) \
duke@435	61	declare_toplevel_type(CMSCollector) \
duke@435	62	declare_toplevel_type(CMSBitMap) \
duke@435	63	declare_toplevel_type(FreeChunk) \
duke@435	64	declare_toplevel_type(ConcurrentMarkSweepThread*) \
duke@435	65	declare_toplevel_type(ConcurrentMarkSweepGeneration*) \
duke@435	66	declare_toplevel_type(SurrogateLockerThread*) \
duke@435	67	declare_toplevel_type(CompactibleFreeListSpace*) \
duke@435	68	declare_toplevel_type(CMSCollector*) \
dcubed@587	69	declare_toplevel_type(FreeChunk*) \
dcubed@587	70	declare_toplevel_type(BinaryTreeDictionary*) \
dcubed@587	71	declare_toplevel_type(FreeBlockDictionary*) \
dcubed@587	72	declare_toplevel_type(FreeList*) \
dcubed@587	73	declare_toplevel_type(FreeList) \
dcubed@587	74	declare_toplevel_type(LinearAllocBlock) \
dcubed@587	75	declare_toplevel_type(FreeBlockDictionary) \
dcubed@587	76	declare_type(BinaryTreeDictionary, FreeBlockDictionary)
duke@435	77
duke@435	78	#define VM_INT_CONSTANTS_CMS(declare_constant) \
duke@435	79	declare_constant(Generation::ConcurrentMarkSweep) \
duke@435	80	declare_constant(PermGen::ConcurrentMarkSweep)