Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parNew/asParNewGeneration.hpp @ 17524:89152779163c
Merge with jdk8-b132
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 11:59:32 +0200 |
| parents | f95d63e2154a |
| children |
| rev | line source |
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| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2005, 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_PARNEW_ASPARNEWGENERATION_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP | |
| 27 | |
| 28 #include "gc_implementation/parNew/parNewGeneration.hpp" | |
| 29 #include "gc_implementation/shared/adaptiveSizePolicy.hpp" | |
| 30 | |
| 0 | 31 // A Generation that does parallel young-gen collection extended |
| 32 // for adaptive size policy. | |
| 33 | |
| 34 // Division of generation into spaces | |
| 35 // done by DefNewGeneration::compute_space_boundaries() | |
| 36 // +---------------+ | |
| 37 // | uncommitted | | |
| 38 // |---------------| | |
| 39 // | ss0 | | |
| 40 // |---------------| | |
| 41 // | ss1 | | |
| 42 // |---------------| | |
| 43 // | | | |
| 44 // | eden | | |
| 45 // | | | |
| 46 // +---------------+ <-- low end of VirtualSpace | |
| 47 // | |
| 48 class ASParNewGeneration: public ParNewGeneration { | |
| 49 | |
| 50 size_t _min_gen_size; | |
| 51 | |
| 52 // Resize the generation based on the desired sizes of | |
| 53 // the constituent spaces. | |
| 54 bool resize_generation(size_t eden_size, size_t survivor_size); | |
| 55 // Resize the spaces based on their desired sizes but | |
| 56 // respecting the maximum size of the generation. | |
| 57 void resize_spaces(size_t eden_size, size_t survivor_size); | |
| 58 // Return the byte size remaining to the minimum generation size. | |
| 59 size_t available_to_min_gen(); | |
| 60 // Return the byte size remaining to the live data in the generation. | |
| 61 size_t available_to_live() const; | |
| 62 // Return the byte size that the generation is allowed to shrink. | |
| 63 size_t limit_gen_shrink(size_t bytes); | |
| 64 // Reset the size of the spaces after a shrink of the generation. | |
| 65 void reset_survivors_after_shrink(); | |
| 66 | |
| 67 // Accessor | |
| 68 VirtualSpace* virtual_space() { return &_virtual_space; } | |
| 69 | |
| 70 virtual void adjust_desired_tenuring_threshold(); | |
| 71 | |
| 72 public: | |
| 73 | |
| 74 ASParNewGeneration(ReservedSpace rs, | |
| 75 size_t initial_byte_size, | |
| 76 size_t min_byte_size, | |
| 77 int level); | |
| 78 | |
| 79 virtual const char* short_name() const { return "ASParNew"; } | |
| 80 virtual const char* name() const; | |
| 81 virtual Generation::Name kind() { return ASParNew; } | |
| 82 | |
| 83 // Change the sizes of eden and the survivor spaces in | |
| 84 // the generation. The parameters are desired sizes | |
| 85 // and are not guaranteed to be met. For example, if | |
| 86 // the total is larger than the generation. | |
| 87 void resize(size_t eden_size, size_t survivor_size); | |
| 88 | |
| 89 virtual void compute_new_size(); | |
| 90 | |
| 91 size_t max_gen_size() { return _reserved.byte_size(); } | |
| 92 size_t min_gen_size() const { return _min_gen_size; } | |
| 93 | |
| 94 // Space boundary invariant checker | |
| 95 void space_invariants() PRODUCT_RETURN; | |
| 96 }; | |
| 1972 | 97 |
| 98 #endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_ASPARNEWGENERATION_HPP |