Mercurial > hg > graal-compiler
comparison src/share/vm/gc_implementation/g1/survRateGroup.hpp @ 342:37f87013dfd8
6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
author | ysr |
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date | Thu, 05 Jun 2008 15:57:56 -0700 |
parents | |
children | 58054a18d735 |
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189:0b27f3512f9e | 342:37f87013dfd8 |
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1 /* | |
2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 class G1CollectorPolicy; | |
26 | |
27 class SurvRateGroup : public CHeapObj { | |
28 private: | |
29 G1CollectorPolicy* _g1p; | |
30 const char* _name; | |
31 | |
32 size_t _array_length; | |
33 double* _surv_rate; | |
34 double* _accum_surv_rate_pred; | |
35 double _last_pred; | |
36 double _accum_surv_rate; | |
37 TruncatedSeq** _surv_rate_pred; | |
38 NumberSeq** _summary_surv_rates; | |
39 size_t _summary_surv_rates_len; | |
40 size_t _summary_surv_rates_max_len; | |
41 | |
42 int _all_regions_allocated; | |
43 size_t _curr_length; | |
44 size_t _scan_only_prefix; | |
45 size_t _setup_seq_num; | |
46 | |
47 public: | |
48 SurvRateGroup(G1CollectorPolicy* g1p, | |
49 const char* name, | |
50 size_t summary_surv_rates_len); | |
51 void start_adding_regions(); | |
52 void stop_adding_regions(); | |
53 void record_scan_only_prefix(size_t scan_only_prefix); | |
54 void record_surviving_words(int age_in_group, size_t surv_words); | |
55 void all_surviving_words_recorded(bool propagate); | |
56 const char* name() { return _name; } | |
57 | |
58 size_t region_num() { return _curr_length; } | |
59 size_t scan_only_length() { return _scan_only_prefix; } | |
60 double accum_surv_rate_pred(int age) { | |
61 assert(age >= 0, "must be"); | |
62 if ((size_t)age < _array_length) | |
63 return _accum_surv_rate_pred[age]; | |
64 else { | |
65 double diff = (double) (age - _array_length + 1); | |
66 return _accum_surv_rate_pred[_array_length-1] + diff * _last_pred; | |
67 } | |
68 } | |
69 | |
70 double accum_surv_rate(size_t adjustment); | |
71 | |
72 TruncatedSeq* get_seq(size_t age) { | |
73 guarantee( 0 <= age, "pre-condition" ); | |
74 if (age >= _setup_seq_num) { | |
75 guarantee( _setup_seq_num > 0, "invariant" ); | |
76 age = _setup_seq_num-1; | |
77 } | |
78 TruncatedSeq* seq = _surv_rate_pred[age]; | |
79 guarantee( seq != NULL, "invariant" ); | |
80 return seq; | |
81 } | |
82 | |
83 int next_age_index(); | |
84 int age_in_group(int age_index) { | |
85 int ret = (int) (_all_regions_allocated - age_index); | |
86 assert( ret >= 0, "invariant" ); | |
87 return ret; | |
88 } | |
89 int recalculate_age_index(int age_index) { | |
90 int new_age_index = (int) _scan_only_prefix - age_in_group(age_index); | |
91 guarantee( new_age_index >= 0, "invariant" ); | |
92 return new_age_index; | |
93 } | |
94 void finished_recalculating_age_indexes() { | |
95 _all_regions_allocated = (int) _scan_only_prefix; | |
96 } | |
97 | |
98 #ifndef PRODUCT | |
99 void print(); | |
100 void print_surv_rate_summary(); | |
101 #endif // PRODUCT | |
102 }; |