1 /* 2 * Copyright (c) 2001, 2015, 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 #ifndef SHARE_VM_GC_G1_SURVRATEGROUP_HPP 26 #define SHARE_VM_GC_G1_SURVRATEGROUP_HPP 27 28 #include "utilities/numberSeq.hpp" 29 30 class G1CollectorPolicy; 31 32 class SurvRateGroup : public CHeapObj<mtGC> { 33 private: 34 G1CollectorPolicy* _g1p; 35 const char* _name; 36 37 size_t _stats_arrays_length; 38 double* _surv_rate; 39 double* _accum_surv_rate_pred; 40 double _last_pred; 41 double _accum_surv_rate; 42 TruncatedSeq** _surv_rate_pred; 43 NumberSeq** _summary_surv_rates; 44 size_t _summary_surv_rates_len; 45 size_t _summary_surv_rates_max_len; 46 47 int _all_regions_allocated; 48 size_t _region_num; 49 size_t _setup_seq_num; 50 51 public: 52 SurvRateGroup(G1CollectorPolicy* g1p, 53 const char* name, 54 size_t summary_surv_rates_len); 55 void reset(); 56 void start_adding_regions(); 57 void stop_adding_regions(); 58 void record_surviving_words(int age_in_group, size_t surv_words); 59 void all_surviving_words_recorded(bool propagate); 60 const char* name() { return _name; } 61 62 size_t region_num() { return _region_num; } 63 double accum_surv_rate_pred(int age) { 64 assert(age >= 0, "must be"); 65 if ((size_t)age < _stats_arrays_length) 66 return _accum_surv_rate_pred[age]; 67 else { 68 double diff = (double) (age - _stats_arrays_length + 1); 69 return _accum_surv_rate_pred[_stats_arrays_length-1] + diff * _last_pred; 70 } 71 } 72 73 double accum_surv_rate(size_t adjustment); 74 75 TruncatedSeq* get_seq(size_t age) { 76 if (age >= _setup_seq_num) { 77 guarantee( _setup_seq_num > 0, "invariant" ); 78 age = _setup_seq_num-1; 79 } 80 TruncatedSeq* seq = _surv_rate_pred[age]; 81 guarantee( seq != NULL, "invariant" ); 82 return seq; 83 } 84 85 int next_age_index(); 86 int age_in_group(int age_index) { 87 int ret = (int) (_all_regions_allocated - age_index); 88 assert( ret >= 0, "invariant" ); 89 return ret; 90 } 91 void finished_recalculating_age_indexes() { 92 _all_regions_allocated = 0; 93 } 94 95 #ifndef PRODUCT 96 void print(); 97 void print_surv_rate_summary(); 98 #endif // PRODUCT 99 }; 100 101 #endif // SHARE_VM_GC_G1_SURVRATEGROUP_HPP