Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/parNew/asParNewGeneration.hpp@fc2b798ab316 (annotated)
src/share/vm/gc_implementation/parNew/asParNewGeneration.hpp
Tue, 10 May 2011 00:33:21 -0700
- author
- ysr
- date
- Tue, 10 May 2011 00:33:21 -0700
- changeset 2889
- fc2b798ab316
- parent 2314
- f95d63e2154a
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
6883834: ParNew: assert(!_g->to()->is_in_reserved(obj),"Scanning field twice?") with LargeObjects tests
Summary: Fixed process_chunk_boundaries(), used for parallel card scanning when using ParNew/CMS, so as to prevent double-scanning, or worse, non-scanning of imprecisely marked objects exceeding parallel chunk size. Made some sizing parameters for parallel card scanning diagnostic, disabled ParallelGCRetainPLAB, and elaborated and clarified some comments.
Reviewed-by: stefank, johnc
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2005, 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_PARNEW_ASPARNEWGENERATION_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "gc_implementation/parNew/parNewGeneration.hpp" |
| stefank@2314 | 29 | #include "gc_implementation/shared/adaptiveSizePolicy.hpp" |
| stefank@2314 | 30 | |
| duke@435 | 31 | // A Generation that does parallel young-gen collection extended |
| duke@435 | 32 | // for adaptive size policy. |
| duke@435 | 33 | |
| duke@435 | 34 | // Division of generation into spaces |
| duke@435 | 35 | // done by DefNewGeneration::compute_space_boundaries() |
| duke@435 | 36 | // +---------------+ |
| duke@435 | 37 | // | uncommitted | |
| duke@435 | 38 | // |---------------| |
| duke@435 | 39 | // | ss0 | |
| duke@435 | 40 | // |---------------| |
| duke@435 | 41 | // | ss1 | |
| duke@435 | 42 | // |---------------| |
| duke@435 | 43 | // | | |
| duke@435 | 44 | // | eden | |
| duke@435 | 45 | // | | |
| duke@435 | 46 | // +---------------+ <-- low end of VirtualSpace |
| duke@435 | 47 | // |
| duke@435 | 48 | class ASParNewGeneration: public ParNewGeneration { |
| duke@435 | 49 | |
| duke@435 | 50 | size_t _min_gen_size; |
| duke@435 | 51 | |
| duke@435 | 52 | // Resize the generation based on the desired sizes of |
| duke@435 | 53 | // the constituent spaces. |
| duke@435 | 54 | bool resize_generation(size_t eden_size, size_t survivor_size); |
| duke@435 | 55 | // Resize the spaces based on their desired sizes but |
| duke@435 | 56 | // respecting the maximum size of the generation. |
| duke@435 | 57 | void resize_spaces(size_t eden_size, size_t survivor_size); |
| duke@435 | 58 | // Return the byte size remaining to the minimum generation size. |
| duke@435 | 59 | size_t available_to_min_gen(); |
| duke@435 | 60 | // Return the byte size remaining to the live data in the generation. |
| duke@435 | 61 | size_t available_to_live() const; |
| duke@435 | 62 | // Return the byte size that the generation is allowed to shrink. |
| duke@435 | 63 | size_t limit_gen_shrink(size_t bytes); |
| duke@435 | 64 | // Reset the size of the spaces after a shrink of the generation. |
| duke@435 | 65 | void reset_survivors_after_shrink(); |
| duke@435 | 66 | |
| duke@435 | 67 | // Accessor |
| duke@435 | 68 | VirtualSpace* virtual_space() { return &_virtual_space; } |
| duke@435 | 69 | |
| duke@435 | 70 | virtual void adjust_desired_tenuring_threshold(); |
| duke@435 | 71 | |
| duke@435 | 72 | public: |
| duke@435 | 73 | |
| duke@435 | 74 | ASParNewGeneration(ReservedSpace rs, |
| duke@435 | 75 | size_t initial_byte_size, |
| duke@435 | 76 | size_t min_byte_size, |
| duke@435 | 77 | int level); |
| duke@435 | 78 | |
| duke@435 | 79 | virtual const char* short_name() const { return "ASParNew"; } |
| duke@435 | 80 | virtual const char* name() const; |
| duke@435 | 81 | virtual Generation::Name kind() { return ASParNew; } |
| duke@435 | 82 | |
| duke@435 | 83 | // Change the sizes of eden and the survivor spaces in |
| duke@435 | 84 | // the generation. The parameters are desired sizes |
| duke@435 | 85 | // and are not guaranteed to be met. For example, if |
| duke@435 | 86 | // the total is larger than the generation. |
| duke@435 | 87 | void resize(size_t eden_size, size_t survivor_size); |
| duke@435 | 88 | |
| duke@435 | 89 | virtual void compute_new_size(); |
| duke@435 | 90 | |
| duke@435 | 91 | size_t max_gen_size() { return _reserved.byte_size(); } |
| duke@435 | 92 | size_t min_gen_size() const { return _min_gen_size; } |
| duke@435 | 93 | |
| duke@435 | 94 | // Space boundary invariant checker |
| duke@435 | 95 | void space_invariants() PRODUCT_RETURN; |
| duke@435 | 96 | }; |
| stefank@2314 | 97 | |
| stefank@2314 | 98 | #endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP |
