Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/parallelScavenge/asPSYoungGen.hpp@4dfb2df418f2 (annotated)
src/share/vm/gc_implementation/parallelScavenge/asPSYoungGen.hpp
Thu, 22 Sep 2011 10:57:37 -0700
- author
- johnc
- date
- Thu, 22 Sep 2011 10:57:37 -0700
- changeset 3175
- 4dfb2df418f2
- parent 2314
- f95d63e2154a
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2003, 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_ASPSYOUNGGEN_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSYOUNGGEN_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "gc_implementation/parallelScavenge/objectStartArray.hpp" |
| stefank@2314 | 29 | #include "gc_implementation/parallelScavenge/psVirtualspace.hpp" |
| stefank@2314 | 30 | #include "gc_implementation/parallelScavenge/psYoungGen.hpp" |
| stefank@2314 | 31 | #include "gc_implementation/shared/generationCounters.hpp" |
| stefank@2314 | 32 | #include "gc_implementation/shared/mutableSpace.hpp" |
| stefank@2314 | 33 | #include "gc_implementation/shared/spaceCounters.hpp" |
| stefank@2314 | 34 | #include "gc_implementation/shared/spaceDecorator.hpp" |
| stefank@2314 | 35 | |
| duke@435 | 36 | class ASPSYoungGen : public PSYoungGen { |
| duke@435 | 37 | friend class VMStructs; |
| duke@435 | 38 | private: |
| duke@435 | 39 | size_t _gen_size_limit; |
| duke@435 | 40 | protected: |
| duke@435 | 41 | virtual size_t available_to_live(); |
| duke@435 | 42 | |
| duke@435 | 43 | public: |
| duke@435 | 44 | ASPSYoungGen(size_t initial_byte_size, |
| duke@435 | 45 | size_t minimum_byte_size, |
| duke@435 | 46 | size_t byte_size_limit); |
| duke@435 | 47 | |
| duke@435 | 48 | ASPSYoungGen(PSVirtualSpace* vs, |
| duke@435 | 49 | size_t initial_byte_size, |
| duke@435 | 50 | size_t minimum_byte_size, |
| duke@435 | 51 | size_t byte_size_limit); |
| duke@435 | 52 | |
| duke@435 | 53 | void initialize(ReservedSpace rs, size_t alignment); |
| duke@435 | 54 | void initialize_virtual_space(ReservedSpace rs, size_t alignment); |
| duke@435 | 55 | |
| duke@435 | 56 | size_t gen_size_limit() { return _gen_size_limit; } |
| duke@435 | 57 | void set_gen_size_limit(size_t v) { _gen_size_limit = v; } |
| duke@435 | 58 | |
| duke@435 | 59 | bool resize_generation(size_t eden_size, size_t survivor_size); |
| duke@435 | 60 | void resize_spaces(size_t eden_size, size_t survivor_size); |
| duke@435 | 61 | |
| duke@435 | 62 | // Adjust eden to be consistent with the virtual space. |
| duke@435 | 63 | void reset_after_change(); |
| duke@435 | 64 | |
| duke@435 | 65 | // Adaptive size policy support |
| duke@435 | 66 | // Return number of bytes that the generation can expand/contract. |
| duke@435 | 67 | size_t available_for_expansion(); |
| duke@435 | 68 | size_t available_for_contraction(); |
| duke@435 | 69 | |
| duke@435 | 70 | // Accessors |
| duke@435 | 71 | void set_reserved(MemRegion v) { _reserved = v; } |
| duke@435 | 72 | |
| duke@435 | 73 | // Printing support |
| duke@435 | 74 | virtual const char* short_name() const { return "ASPSYoungGen"; } |
| duke@435 | 75 | }; |
| stefank@2314 | 76 | |
| stefank@2314 | 77 | #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSYOUNGGEN_HPP |
