1 /* 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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 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 class G1CollectorPolicy; 26 27 class SurvRateGroup : public CHeapObj { 28 private: 29 G1CollectorPolicy* _g1p; 30 const char* _name; 31 32 size_t _stats_arrays_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 _region_num; 44 size_t _setup_seq_num; 45 46 public: 47 SurvRateGroup(G1CollectorPolicy* g1p, 48 const char* name, 49 size_t summary_surv_rates_len); 50 void reset(); 51 void start_adding_regions(); 52 void stop_adding_regions(); 53 void record_surviving_words(int age_in_group, size_t surv_words); 54 void all_surviving_words_recorded(bool propagate); 55 const char* name() { return _name; } 56 57 size_t region_num() { return _region_num; } 58 double accum_surv_rate_pred(int age) { 59 assert(age >= 0, "must be"); 60 if ((size_t)age < _stats_arrays_length) 61 return _accum_surv_rate_pred[age]; 62 else { 63 double diff = (double) (age - _stats_arrays_length + 1); 64 return _accum_surv_rate_pred[_stats_arrays_length-1] + diff * _last_pred; 65 } 66 } 67 68 double accum_surv_rate(size_t adjustment); 69 70 TruncatedSeq* get_seq(size_t age) { 71 if (age >= _setup_seq_num) { 72 guarantee( _setup_seq_num > 0, "invariant" ); 73 age = _setup_seq_num-1; 74 } 75 TruncatedSeq* seq = _surv_rate_pred[age]; 76 guarantee( seq != NULL, "invariant" ); 77 return seq; 78 } 79 80 int next_age_index(); 81 int age_in_group(int age_index) { 82 int ret = (int) (_all_regions_allocated - age_index); 83 assert( ret >= 0, "invariant" ); 84 return ret; 85 } 86 void finished_recalculating_age_indexes() { 87 _all_regions_allocated = 0; 88 } 89 90 #ifndef PRODUCT 91 void print(); 92 void print_surv_rate_summary(); 93 #endif // PRODUCT 94 };