[136] | 1 | //=====================================================
|
---|
| 2 | // File : portable_perf_analyzer.hh
|
---|
| 3 | // Author : L. Plagne <laurent.plagne@edf.fr)>
|
---|
| 4 | // Copyright (C) EDF R&D, mar d�c 3 18:59:35 CET 2002
|
---|
| 5 | //=====================================================
|
---|
| 6 | //
|
---|
| 7 | // This program is free software; you can redistribute it and/or
|
---|
| 8 | // modify it under the terms of the GNU General Public License
|
---|
| 9 | // as published by the Free Software Foundation; either version 2
|
---|
| 10 | // of the License, or (at your option) any later version.
|
---|
| 11 | //
|
---|
| 12 | // This program is distributed in the hope that it will be useful,
|
---|
| 13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 15 | // GNU General Public License for more details.
|
---|
| 16 | // You should have received a copy of the GNU General Public License
|
---|
| 17 | // along with this program; if not, write to the Free Software
|
---|
| 18 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
---|
| 19 | //
|
---|
| 20 | #ifndef _PORTABLE_PERF_ANALYZER_HH
|
---|
| 21 | #define _PORTABLE_PERF_ANALYZER_HH
|
---|
| 22 |
|
---|
| 23 | #include "utilities.h"
|
---|
| 24 | #include "timers/portable_timer.hh"
|
---|
| 25 |
|
---|
| 26 | template <class Action>
|
---|
| 27 | class Portable_Perf_Analyzer{
|
---|
| 28 | public:
|
---|
| 29 | Portable_Perf_Analyzer( void ):_nb_calc(1),_nb_init(1),_chronos(){
|
---|
| 30 | MESSAGE("Portable_Perf_Analyzer Ctor");
|
---|
| 31 | };
|
---|
| 32 | Portable_Perf_Analyzer( const Portable_Perf_Analyzer & ){
|
---|
| 33 | INFOS("Copy Ctor not implemented");
|
---|
| 34 | exit(0);
|
---|
| 35 | };
|
---|
| 36 | ~Portable_Perf_Analyzer( void ){
|
---|
| 37 | MESSAGE("Portable_Perf_Analyzer Dtor");
|
---|
| 38 | };
|
---|
| 39 |
|
---|
| 40 |
|
---|
| 41 |
|
---|
| 42 | inline double eval_mflops(int size)
|
---|
| 43 | {
|
---|
| 44 |
|
---|
| 45 | Action action(size);
|
---|
| 46 |
|
---|
| 47 | // double time_baseline = time_init(action);
|
---|
| 48 | // while (time_baseline < MIN_TIME_INIT)
|
---|
| 49 | // {
|
---|
| 50 | // _nb_init *= 2;
|
---|
| 51 | // time_baseline = time_init(action);
|
---|
| 52 | // }
|
---|
| 53 | //
|
---|
| 54 | // // optimize
|
---|
| 55 | // for (int i=1; i<NB_TRIES; ++i)
|
---|
| 56 | // time_baseline = std::min(time_baseline, time_init(action));
|
---|
| 57 | //
|
---|
| 58 | // time_baseline = time_baseline/(double(_nb_init));
|
---|
| 59 |
|
---|
| 60 | double time_action = time_calculate(action);
|
---|
| 61 | while (time_action < MIN_TIME)
|
---|
| 62 | {
|
---|
| 63 | _nb_calc *= 2;
|
---|
| 64 | time_action = time_calculate(action);
|
---|
| 65 | }
|
---|
| 66 |
|
---|
| 67 | // optimize
|
---|
| 68 | for (int i=1; i<NB_TRIES; ++i)
|
---|
| 69 | time_action = std::min(time_action, time_calculate(action));
|
---|
| 70 |
|
---|
| 71 | // INFOS("size="<<size);
|
---|
| 72 | // INFOS("_nb_init="<<_nb_init);
|
---|
| 73 | // INFOS("_nb_calc="<<_nb_calc);
|
---|
| 74 |
|
---|
| 75 | time_action = time_action / (double(_nb_calc));
|
---|
| 76 |
|
---|
| 77 | action.check_result();
|
---|
| 78 |
|
---|
| 79 |
|
---|
| 80 | double time_baseline = time_init(action);
|
---|
| 81 | for (int i=1; i<NB_TRIES; ++i)
|
---|
| 82 | time_baseline = std::min(time_baseline, time_init(action));
|
---|
| 83 | time_baseline = time_baseline/(double(_nb_init));
|
---|
| 84 |
|
---|
| 85 |
|
---|
| 86 |
|
---|
| 87 | // INFOS("time_baseline="<<time_baseline);
|
---|
| 88 | // INFOS("time_action="<<time_action);
|
---|
| 89 |
|
---|
| 90 | time_action = time_action - time_baseline;
|
---|
| 91 |
|
---|
| 92 | // INFOS("time_corrected="<<time_action);
|
---|
| 93 |
|
---|
| 94 | return action.nb_op_base()/(time_action*1000000.0);
|
---|
| 95 | }
|
---|
| 96 |
|
---|
| 97 | inline double time_init(Action & action)
|
---|
| 98 | {
|
---|
| 99 | // time measurement
|
---|
| 100 | _chronos.start();
|
---|
| 101 | for (int ii=0; ii<_nb_init; ii++)
|
---|
| 102 | action.initialize();
|
---|
| 103 | _chronos.stop();
|
---|
| 104 | return _chronos.user_time();
|
---|
| 105 | }
|
---|
| 106 |
|
---|
| 107 |
|
---|
| 108 | inline double time_calculate(Action & action)
|
---|
| 109 | {
|
---|
| 110 | // time measurement
|
---|
| 111 | _chronos.start();
|
---|
| 112 | for (int ii=0;ii<_nb_calc;ii++)
|
---|
| 113 | {
|
---|
| 114 | action.initialize();
|
---|
| 115 | action.calculate();
|
---|
| 116 | }
|
---|
| 117 | _chronos.stop();
|
---|
| 118 | return _chronos.user_time();
|
---|
| 119 | }
|
---|
| 120 |
|
---|
| 121 | unsigned long long get_nb_calc( void )
|
---|
| 122 | {
|
---|
| 123 | return _nb_calc;
|
---|
| 124 | }
|
---|
| 125 |
|
---|
| 126 |
|
---|
| 127 | private:
|
---|
| 128 | unsigned long long _nb_calc;
|
---|
| 129 | unsigned long long _nb_init;
|
---|
| 130 | Portable_Timer _chronos;
|
---|
| 131 |
|
---|
| 132 | };
|
---|
| 133 |
|
---|
| 134 | #endif //_PORTABLE_PERF_ANALYZER_HH
|
---|