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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_G1_SURVRATEGROUP_HPP
26 #define SHARE_GC_G1_SURVRATEGROUP_HPP
27
28 #include "utilities/numberSeq.hpp"
29
30 class G1Predictions;
31
32 class SurvRateGroup : public CHeapObj<mtGC> {
33 private:
34 size_t _stats_arrays_length;
35 double* _accum_surv_rate_pred;
36 double _last_pred;
37 TruncatedSeq** _surv_rate_pred;
38
39 int _all_regions_allocated;
40 size_t _region_num;
41 size_t _setup_seq_num;
42
43 void fill_in_last_surv_rates();
44 void finalize_predictions(const G1Predictions& predictor);
45 public:
46 SurvRateGroup();
47 void reset();
48 void start_adding_regions();
49 void stop_adding_regions();
50 void record_surviving_words(int age_in_group, size_t surv_words);
51 void all_surviving_words_recorded(const G1Predictions& predictor, bool update_predictors);
52
53 size_t region_num() const { return _region_num; }
54
55 double accum_surv_rate_pred(int age) const {
56 assert(age >= 0, "must be");
57 if ((size_t)age < _stats_arrays_length)
58 return _accum_surv_rate_pred[age];
59 else {
60 double diff = (double) (age - _stats_arrays_length + 1);
61 return _accum_surv_rate_pred[_stats_arrays_length-1] + diff * _last_pred;
62 }
63 }
64
65 TruncatedSeq* get_seq(size_t age) const {
66 if (age >= _setup_seq_num) {
67 guarantee( _setup_seq_num > 0, "invariant" );
68 age = _setup_seq_num-1;
69 }
70 TruncatedSeq* seq = _surv_rate_pred[age];
71 guarantee( seq != NULL, "invariant" );
72 return seq;
73 }
74
75 int next_age_index() {
76 ++_region_num;
77 return (int) ++_all_regions_allocated;
78 }
79
80 int age_in_group(int age_index) const {
81 int ret = (int) (_all_regions_allocated - age_index);
82 assert( ret >= 0, "invariant" );
83 return ret;
84 }
85 void finished_recalculating_age_indexes() {
86 _all_regions_allocated = 0;
87 }
88
89 };
90
91 #endif // SHARE_GC_G1_SURVRATEGROUP_HPP
|
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_GC_G1_SURVRATEGROUP_HPP
26 #define SHARE_GC_G1_SURVRATEGROUP_HPP
27
28 #include "gc/g1/g1Predictions.hpp"
29 #include "utilities/numberSeq.hpp"
30
31 class SurvRateGroup : public CHeapObj<mtGC> {
32 size_t _stats_arrays_length;
33 double* _accum_surv_rate_pred;
34 double _last_pred;
35 TruncatedSeq** _surv_rate_predictors;
36
37 size_t _num_added_regions; // The number of regions in this SurvRateGroup
38
39 void fill_in_last_surv_rates();
40 void finalize_predictions(const G1Predictions& predictor);
41
42 public:
43 static const int InvalidAgeIndex = -1;
44 static bool is_valid_age_index(int age) { return age >= 0; }
45
46 SurvRateGroup();
47 void reset();
48 void start_adding_regions();
49 void stop_adding_regions();
50 void record_surviving_words(int age_in_group, size_t surv_words);
51 void all_surviving_words_recorded(const G1Predictions& predictor, bool update_predictors);
52
53 double accum_surv_rate_pred(int age) const {
54 assert(_stats_arrays_length > 0, "invariant" );
55 assert(is_valid_age_index(age), "must be");
56 if ((size_t)age < _stats_arrays_length)
57 return _accum_surv_rate_pred[age];
58 else {
59 double diff = (double)(age - _stats_arrays_length + 1);
60 return _accum_surv_rate_pred[_stats_arrays_length - 1] + diff * _last_pred;
61 }
62 }
63
64 double surv_rate_pred(G1Predictions const& predictor, int age) const {
65 assert(is_valid_age_index(age), "must be");
66
67 age = MIN2(age, (int)_stats_arrays_length - 1);
68
69 return predictor.get_new_unit_prediction(_surv_rate_predictors[age]);
70 }
71
72 int next_age_index() {
73 return (int)++_num_added_regions;
74 }
75
76 int age_in_group(int age_index) const {
77 int result = (int)(_num_added_regions - age_index);
78 assert(is_valid_age_index(result), "invariant" );
79 return result;
80 }
81 };
82
83 #endif // SHARE_GC_G1_SURVRATEGROUP_HPP
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