/*
* Copyright (c) 2001, 2010, 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.
*
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#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_SURVRATEGROUP_HPP
#define SHARE_VM_GC_IMPLEMENTATION_G1_SURVRATEGROUP_HPP
#include "utilities/numberSeq.hpp"
class G1CollectorPolicy;
class SurvRateGroup : public CHeapObj<mtGC> {
private:
G1CollectorPolicy* _g1p;
const char* _name;
size_t _stats_arrays_length;
double* _surv_rate;
double* _accum_surv_rate_pred;
double _last_pred;
double _accum_surv_rate;
TruncatedSeq** _surv_rate_pred;
NumberSeq** _summary_surv_rates;
size_t _summary_surv_rates_len;
size_t _summary_surv_rates_max_len;
int _all_regions_allocated;
size_t _region_num;
size_t _setup_seq_num;
public:
SurvRateGroup(G1CollectorPolicy* g1p,
const char* name,
size_t summary_surv_rates_len);
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(bool propagate);
const char* name() { return _name; }
size_t region_num() { return _region_num; }
double accum_surv_rate_pred(int age) {
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;
}
}
double accum_surv_rate(size_t adjustment);
TruncatedSeq* get_seq(size_t age) {
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();
int age_in_group(int age_index) {
int ret = (int) (_all_regions_allocated - age_index);
assert( ret >= 0, "invariant" );
return ret;
}
void finished_recalculating_age_indexes() {
_all_regions_allocated = 0;
}
#ifndef PRODUCT
void print();
void print_surv_rate_summary();
#endif // PRODUCT
};
#endif // SHARE_VM_GC_IMPLEMENTATION_G1_SURVRATEGROUP_HPP