| /* |
| * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_GC_G1_SURVRATEGROUP_HPP |
| #define SHARE_VM_GC_G1_SURVRATEGROUP_HPP |
| |
| #include "utilities/numberSeq.hpp" |
| |
| class G1Predictions; |
| |
| class SurvRateGroup : public CHeapObj<mtGC> { |
| private: |
| size_t _stats_arrays_length; |
| double* _accum_surv_rate_pred; |
| double _last_pred; |
| TruncatedSeq** _surv_rate_pred; |
| |
| int _all_regions_allocated; |
| size_t _region_num; |
| size_t _setup_seq_num; |
| |
| void fill_in_last_surv_rates(); |
| void finalize_predictions(const G1Predictions& predictor); |
| public: |
| SurvRateGroup(); |
| void reset(); |
| void start_adding_regions(); |
| void stop_adding_regions(); |
| void record_surviving_words(int age_in_group, size_t surv_words); |
| void all_surviving_words_recorded(const G1Predictions& predictor, bool update_predictors); |
| |
| size_t region_num() const { return _region_num; } |
| |
| double accum_surv_rate_pred(int age) const { |
| assert(age >= 0, "must be"); |
| if ((size_t)age < _stats_arrays_length) |
| return _accum_surv_rate_pred[age]; |
| else { |
| double diff = (double) (age - _stats_arrays_length + 1); |
| return _accum_surv_rate_pred[_stats_arrays_length-1] + diff * _last_pred; |
| } |
| } |
| |
| TruncatedSeq* get_seq(size_t age) const { |
| if (age >= _setup_seq_num) { |
| guarantee( _setup_seq_num > 0, "invariant" ); |
| age = _setup_seq_num-1; |
| } |
| TruncatedSeq* seq = _surv_rate_pred[age]; |
| guarantee( seq != NULL, "invariant" ); |
| return seq; |
| } |
| |
| int next_age_index() { |
| ++_region_num; |
| return (int) ++_all_regions_allocated; |
| } |
| |
| int age_in_group(int age_index) const { |
| int ret = (int) (_all_regions_allocated - age_index); |
| assert( ret >= 0, "invariant" ); |
| return ret; |
| } |
| void finished_recalculating_age_indexes() { |
| _all_regions_allocated = 0; |
| } |
| |
| }; |
| |
| #endif // SHARE_VM_GC_G1_SURVRATEGROUP_HPP |