Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp@1fb790245268 (annotated)
src/share/vm/gc_implementation/parallelScavenge/psMarkSweepDecorator.hpp
Fri, 11 Mar 2011 16:35:18 +0100
- author
- jwilhelm
- date
- Fri, 11 Mar 2011 16:35:18 +0100
- changeset 2648
- 1fb790245268
- parent 2314
- f95d63e2154a
- child 3900
- d2a62e0f25eb
- permissions
- -rw-r--r--
6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Summary: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Reviewed-by: johnc, jmasa, ysr
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "gc_implementation/shared/mutableSpace.hpp" |
| stefank@2314 | 29 | |
| duke@435 | 30 | // |
| duke@435 | 31 | // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations |
| duke@435 | 32 | // to a MutableSpace. |
| duke@435 | 33 | // |
| duke@435 | 34 | |
| duke@435 | 35 | class ObjectStartArray; |
| duke@435 | 36 | |
| duke@435 | 37 | class PSMarkSweepDecorator: public CHeapObj { |
| duke@435 | 38 | private: |
| duke@435 | 39 | static PSMarkSweepDecorator* _destination_decorator; |
| duke@435 | 40 | |
| duke@435 | 41 | protected: |
| duke@435 | 42 | MutableSpace* _space; |
| duke@435 | 43 | ObjectStartArray* _start_array; |
| duke@435 | 44 | HeapWord* _first_dead; |
| duke@435 | 45 | HeapWord* _end_of_live; |
| duke@435 | 46 | HeapWord* _compaction_top; |
| jcoomes@873 | 47 | size_t _allowed_dead_ratio; |
| duke@435 | 48 | |
| jcoomes@873 | 49 | bool insert_deadspace(size_t& allowed_deadspace_words, HeapWord* q, |
| jcoomes@873 | 50 | size_t word_len); |
| duke@435 | 51 | |
| duke@435 | 52 | public: |
| duke@435 | 53 | PSMarkSweepDecorator(MutableSpace* space, ObjectStartArray* start_array, |
| jcoomes@873 | 54 | size_t allowed_dead_ratio) : |
| jcoomes@873 | 55 | _space(space), _start_array(start_array), |
| jcoomes@873 | 56 | _allowed_dead_ratio(allowed_dead_ratio) { } |
| duke@435 | 57 | |
| duke@435 | 58 | // During a compacting collection, we need to collapse objects into |
| duke@435 | 59 | // spaces in a given order. We want to fill space A, space B, and so |
| duke@435 | 60 | // on. The code that controls that order is in the following methods. |
| duke@435 | 61 | static void set_destination_decorator_tenured(); |
| duke@435 | 62 | static void set_destination_decorator_perm_gen(); |
| duke@435 | 63 | static void advance_destination_decorator(); |
| duke@435 | 64 | static PSMarkSweepDecorator* destination_decorator(); |
| duke@435 | 65 | |
| duke@435 | 66 | // Accessors |
| jcoomes@873 | 67 | MutableSpace* space() { return _space; } |
| jcoomes@873 | 68 | ObjectStartArray* start_array() { return _start_array; } |
| duke@435 | 69 | |
| jcoomes@873 | 70 | HeapWord* compaction_top() { return _compaction_top; } |
| jcoomes@873 | 71 | void set_compaction_top(HeapWord* value) { _compaction_top = value; } |
| duke@435 | 72 | |
| jcoomes@873 | 73 | size_t allowed_dead_ratio() { return _allowed_dead_ratio; } |
| jcoomes@873 | 74 | void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; } |
| duke@435 | 75 | |
| duke@435 | 76 | // Work methods |
| duke@435 | 77 | void adjust_pointers(); |
| duke@435 | 78 | void precompact(); |
| duke@435 | 79 | void compact(bool mangle_free_space); |
| duke@435 | 80 | }; |
| stefank@2314 | 81 | |
| stefank@2314 | 82 | #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP |
