Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/asPSOldGen.hpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Tue, 05 Mar 2013 15:36:56 -0800 |
| parents | f95d63e2154a |
| children | f99cd6e20ab1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSOLDGEN_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSOLDGEN_HPP | |
| 27 | |
| 28 #include "gc_implementation/parallelScavenge/objectStartArray.hpp" | |
| 29 #include "gc_implementation/parallelScavenge/psOldGen.hpp" | |
| 30 #include "gc_implementation/parallelScavenge/psVirtualspace.hpp" | |
| 31 #include "gc_implementation/shared/generationCounters.hpp" | |
| 32 #include "gc_implementation/shared/mutableSpace.hpp" | |
| 33 #include "gc_implementation/shared/spaceCounters.hpp" | |
| 34 | |
| 0 | 35 class ASPSOldGen : public PSOldGen { |
| 36 friend class VMStructs; | |
| 37 size_t _gen_size_limit; // Largest size the generation's reserved size | |
| 38 // can grow. | |
| 39 public: | |
| 40 ASPSOldGen(size_t initial_byte_size, | |
| 41 size_t minimum_byte_size, | |
| 42 size_t byte_size_limit, | |
| 43 const char* gen_name, int level); | |
| 44 ASPSOldGen(PSVirtualSpace* vs, | |
| 45 size_t initial_byte_size, | |
| 46 size_t minimum_byte_size, | |
| 47 size_t byte_size_limit, | |
| 48 const char* gen_name, int level); | |
| 49 size_t gen_size_limit() { return _gen_size_limit; } | |
| 50 size_t max_gen_size() { return _reserved.byte_size(); } | |
| 51 void set_gen_size_limit(size_t v) { _gen_size_limit = v; } | |
| 52 | |
| 53 // After a shrink or expand reset the generation | |
| 54 void reset_after_change(); | |
| 55 | |
| 56 // Return number of bytes that the virtual space in the generation is willing | |
| 57 // to expand or contract. The results from these methods should feed into the | |
| 58 // decisions about adjusting the virtual space. | |
| 59 size_t available_for_expansion(); | |
| 60 size_t available_for_contraction(); | |
| 61 | |
| 62 // Accessors | |
| 63 void set_reserved(MemRegion v) { _reserved = v; } | |
| 64 | |
| 65 // Debugging support | |
| 66 virtual const char* short_name() const { return "ASPSOldGen"; } | |
| 67 }; | |
| 1972 | 68 |
| 69 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_ASPSOLDGEN_HPP |