Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/survRateGroup.hpp@4dfb2df418f2 (annotated)
src/share/vm/gc_implementation/g1/survRateGroup.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 3900
- d2a62e0f25eb
- 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
| ysr@777 | 1 | /* |
| trims@1907 | 2 | * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 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. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_SURVRATEGROUP_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_SURVRATEGROUP_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "utilities/numberSeq.hpp" |
| stefank@2314 | 29 | |
| ysr@777 | 30 | class G1CollectorPolicy; |
| ysr@777 | 31 | |
| ysr@777 | 32 | class SurvRateGroup : public CHeapObj { |
| ysr@777 | 33 | private: |
| ysr@777 | 34 | G1CollectorPolicy* _g1p; |
| ysr@777 | 35 | const char* _name; |
| ysr@777 | 36 | |
| apetrusenko@980 | 37 | size_t _stats_arrays_length; |
| ysr@777 | 38 | double* _surv_rate; |
| ysr@777 | 39 | double* _accum_surv_rate_pred; |
| ysr@777 | 40 | double _last_pred; |
| ysr@777 | 41 | double _accum_surv_rate; |
| ysr@777 | 42 | TruncatedSeq** _surv_rate_pred; |
| ysr@777 | 43 | NumberSeq** _summary_surv_rates; |
| ysr@777 | 44 | size_t _summary_surv_rates_len; |
| ysr@777 | 45 | size_t _summary_surv_rates_max_len; |
| ysr@777 | 46 | |
| ysr@777 | 47 | int _all_regions_allocated; |
| apetrusenko@980 | 48 | size_t _region_num; |
| ysr@777 | 49 | size_t _setup_seq_num; |
| ysr@777 | 50 | |
| ysr@777 | 51 | public: |
| ysr@777 | 52 | SurvRateGroup(G1CollectorPolicy* g1p, |
| ysr@777 | 53 | const char* name, |
| ysr@777 | 54 | size_t summary_surv_rates_len); |
| apetrusenko@980 | 55 | void reset(); |
| ysr@777 | 56 | void start_adding_regions(); |
| ysr@777 | 57 | void stop_adding_regions(); |
| ysr@777 | 58 | void record_surviving_words(int age_in_group, size_t surv_words); |
| ysr@777 | 59 | void all_surviving_words_recorded(bool propagate); |
| ysr@777 | 60 | const char* name() { return _name; } |
| ysr@777 | 61 | |
| apetrusenko@980 | 62 | size_t region_num() { return _region_num; } |
| ysr@777 | 63 | double accum_surv_rate_pred(int age) { |
| ysr@777 | 64 | assert(age >= 0, "must be"); |
| apetrusenko@980 | 65 | if ((size_t)age < _stats_arrays_length) |
| ysr@777 | 66 | return _accum_surv_rate_pred[age]; |
| ysr@777 | 67 | else { |
| apetrusenko@980 | 68 | double diff = (double) (age - _stats_arrays_length + 1); |
| apetrusenko@980 | 69 | return _accum_surv_rate_pred[_stats_arrays_length-1] + diff * _last_pred; |
| ysr@777 | 70 | } |
| ysr@777 | 71 | } |
| ysr@777 | 72 | |
| ysr@777 | 73 | double accum_surv_rate(size_t adjustment); |
| ysr@777 | 74 | |
| ysr@777 | 75 | TruncatedSeq* get_seq(size_t age) { |
| ysr@777 | 76 | if (age >= _setup_seq_num) { |
| ysr@777 | 77 | guarantee( _setup_seq_num > 0, "invariant" ); |
| ysr@777 | 78 | age = _setup_seq_num-1; |
| ysr@777 | 79 | } |
| ysr@777 | 80 | TruncatedSeq* seq = _surv_rate_pred[age]; |
| ysr@777 | 81 | guarantee( seq != NULL, "invariant" ); |
| ysr@777 | 82 | return seq; |
| ysr@777 | 83 | } |
| ysr@777 | 84 | |
| ysr@777 | 85 | int next_age_index(); |
| ysr@777 | 86 | int age_in_group(int age_index) { |
| johnc@1829 | 87 | int ret = (int) (_all_regions_allocated - age_index); |
| ysr@777 | 88 | assert( ret >= 0, "invariant" ); |
| ysr@777 | 89 | return ret; |
| ysr@777 | 90 | } |
| ysr@777 | 91 | void finished_recalculating_age_indexes() { |
| johnc@1829 | 92 | _all_regions_allocated = 0; |
| ysr@777 | 93 | } |
| ysr@777 | 94 | |
| ysr@777 | 95 | #ifndef PRODUCT |
| ysr@777 | 96 | void print(); |
| ysr@777 | 97 | void print_surv_rate_summary(); |
| ysr@777 | 98 | #endif // PRODUCT |
| ysr@777 | 99 | }; |
| stefank@2314 | 100 | |
| stefank@2314 | 101 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_SURVRATEGROUP_HPP |
