1 | //=====================================================
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2 | // File : portable_perf_analyzer.hh
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3 | // Author : L. Plagne <laurent.plagne@edf.fr)>
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4 | // Copyright (C) EDF R&D, mar d�c 3 18:59:35 CET 2002
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5 | // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
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6 | //=====================================================
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7 | //
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8 | // This program is free software; you can redistribute it and/or
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9 | // modify it under the terms of the GNU General Public License
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10 | // as published by the Free Software Foundation; either version 2
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11 | // of the License, or (at your option) any later version.
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12 | //
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13 | // This program is distributed in the hope that it will be useful,
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14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 | // GNU General Public License for more details.
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17 | // You should have received a copy of the GNU General Public License
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18 | // along with this program; if not, write to the Free Software
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19 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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20 | //
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21 | #ifndef _PORTABLE_PERF_ANALYZER_HH
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22 | #define _PORTABLE_PERF_ANALYZER_HH
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23 |
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24 | #include "utilities.h"
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25 | #include "timers/portable_timer.hh"
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26 |
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27 | template <class Action>
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28 | class Portable_Perf_Analyzer{
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29 | public:
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30 | Portable_Perf_Analyzer( ):_nb_calc(0), m_time_action(0), _chronos(){
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31 | MESSAGE("Portable_Perf_Analyzer Ctor");
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32 | };
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33 | Portable_Perf_Analyzer( const Portable_Perf_Analyzer & ){
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34 | INFOS("Copy Ctor not implemented");
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35 | exit(0);
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36 | };
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37 | ~Portable_Perf_Analyzer(){
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38 | MESSAGE("Portable_Perf_Analyzer Dtor");
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39 | };
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40 |
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41 | BTL_DONT_INLINE double eval_mflops(int size)
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42 | {
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43 | Action action(size);
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44 |
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45 | // action.initialize();
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46 | // time_action = time_calculate(action);
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47 | while (m_time_action < MIN_TIME)
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48 | {
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49 | if(_nb_calc==0) _nb_calc = 1;
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50 | else _nb_calc *= 2;
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51 | action.initialize();
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52 | m_time_action = time_calculate(action);
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53 | }
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54 |
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55 | // optimize
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56 | for (int i=1; i<BtlConfig::Instance.tries; ++i)
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57 | {
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58 | Action _action(size);
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59 | std::cout << " " << _action.nb_op_base()*_nb_calc/(m_time_action*1e6) << " ";
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60 | _action.initialize();
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61 | m_time_action = std::min(m_time_action, time_calculate(_action));
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62 | }
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63 |
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64 | double time_action = m_time_action / (double(_nb_calc));
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65 |
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66 | // check
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67 | if (BtlConfig::Instance.checkResults && size<128)
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68 | {
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69 | action.initialize();
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70 | action.calculate();
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71 | action.check_result();
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72 | }
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73 | return action.nb_op_base()/(time_action*1e6);
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74 | }
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75 |
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76 | BTL_DONT_INLINE double time_calculate(Action & action)
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77 | {
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78 | // time measurement
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79 | action.calculate();
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80 | _chronos.start();
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81 | for (int ii=0;ii<_nb_calc;ii++)
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82 | {
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83 | action.calculate();
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84 | }
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85 | _chronos.stop();
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86 | return _chronos.user_time();
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87 | }
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88 |
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89 | unsigned long long get_nb_calc()
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90 | {
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91 | return _nb_calc;
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92 | }
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93 |
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94 |
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95 | private:
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96 | unsigned long long _nb_calc;
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97 | double m_time_action;
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98 | Portable_Timer _chronos;
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99 |
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100 | };
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101 |
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102 | #endif //_PORTABLE_PERF_ANALYZER_HH
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103 |
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