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src/share/vm/gc_implementation/concurrentMarkSweep/vmStructs_cms.hpp@c96030fff130

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

     1 /*

     2  * Copyright (c) 2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    24 

    25 #define VM_STRUCTS_CMS(nonstatic_field, \

    26                    volatile_nonstatic_field, \

    27                    static_field) \

    28   nonstatic_field(CompactibleFreeListSpace,    _collector,                                    CMSCollector*)                         \

    29   nonstatic_field(CompactibleFreeListSpace,    _bt,                                           BlockOffsetArrayNonContigSpace)        \

    30                                                                                                                                      \

    31   nonstatic_field(CMSPermGen,                  _gen,                                          ConcurrentMarkSweepGeneration*)        \

    32   nonstatic_field(CMSBitMap,                   _bmStartWord,                                  HeapWord*)                             \

    33   nonstatic_field(CMSBitMap,                   _bmWordSize,                                   size_t)                                \

    34   nonstatic_field(CMSBitMap,                   _shifter,                                      const int)                            \

    35   nonstatic_field(CMSBitMap,                      _bm,                                           BitMap)                            \

    36   nonstatic_field(CMSBitMap,                   _virtual_space,                                VirtualSpace)                         \

    37   nonstatic_field(CMSCollector,                _markBitMap,                                   CMSBitMap)                             \

    38   nonstatic_field(ConcurrentMarkSweepGeneration, _cmsSpace,                                   CompactibleFreeListSpace*)             \

    39      static_field(ConcurrentMarkSweepThread,   _collector,                                    CMSCollector*)                         \

    40   volatile_nonstatic_field(FreeChunk,          _size,                                         size_t)                                \

    41   nonstatic_field(FreeChunk,                   _next,                                         FreeChunk*)                            \

    42   nonstatic_field(FreeChunk,                   _prev,                                         FreeChunk*)                            \

    43   nonstatic_field(LinearAllocBlock,            _word_size,                                    size_t)                                \

    44   nonstatic_field(FreeList,                    _size,                                         size_t)                                \

    45   nonstatic_field(FreeList,                    _count,                                        ssize_t)                               \

    46   nonstatic_field(BinaryTreeDictionary,        _totalSize,                                    size_t)                                \

    47   nonstatic_field(CompactibleFreeListSpace,    _dictionary,                                   FreeBlockDictionary*)                  \

    48   nonstatic_field(CompactibleFreeListSpace,    _indexedFreeList[0],                           FreeList)                              \

    49   nonstatic_field(CompactibleFreeListSpace,    _smallLinearAllocBlock,                        LinearAllocBlock)

    50 

    51 

    52 #define VM_TYPES_CMS(declare_type,                                        \

    53                      declare_toplevel_type)                               \

    54                                                                           \

    55            declare_type(ConcurrentMarkSweepGeneration,CardGeneration)     \

    56            declare_type(CompactibleFreeListSpace,     CompactibleSpace)   \

    57            declare_type(CMSPermGenGen,                ConcurrentMarkSweepGeneration) \

    58            declare_type(CMSPermGen,                   PermGen)            \

    59            declare_type(ConcurrentMarkSweepThread,    NamedThread)        \

    60            declare_type(SurrogateLockerThread, JavaThread)                \

    61   declare_toplevel_type(CMSCollector)                                     \

    62   declare_toplevel_type(CMSBitMap)                                        \

    63   declare_toplevel_type(FreeChunk)                                        \

    64   declare_toplevel_type(ConcurrentMarkSweepThread*)                       \

    65   declare_toplevel_type(ConcurrentMarkSweepGeneration*)                   \

    66   declare_toplevel_type(SurrogateLockerThread*)                           \

    67   declare_toplevel_type(CompactibleFreeListSpace*)                        \

    68   declare_toplevel_type(CMSCollector*)                                    \

    69   declare_toplevel_type(FreeChunk*)                                       \

    70   declare_toplevel_type(BinaryTreeDictionary*)                            \

    71   declare_toplevel_type(FreeBlockDictionary*)                             \

    72   declare_toplevel_type(FreeList*)                                        \

    73   declare_toplevel_type(FreeList)                                         \

    74   declare_toplevel_type(LinearAllocBlock)                                 \

    75   declare_toplevel_type(FreeBlockDictionary)                              \

    76             declare_type(BinaryTreeDictionary,        FreeBlockDictionary)

    77 

    78 #define VM_INT_CONSTANTS_CMS(declare_constant)                            \

    79   declare_constant(Generation::ConcurrentMarkSweep)                       \

    80   declare_constant(PermGen::ConcurrentMarkSweep)

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