| //===================================================== |
| // File : portable_perf_analyzer.hh |
| // Author : L. Plagne <laurent.plagne@edf.fr)> |
| // Copyright (C) EDF R&D, mar d�c 3 18:59:35 CET 2002 |
| //===================================================== |
| // |
| // This program is free software; you can redistribute it and/or |
| // modify it under the terms of the GNU General Public License |
| // as published by the Free Software Foundation; either version 2 |
| // of the License, or (at your option) any later version. |
| // |
| // This program 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 for more details. |
| // You should have received a copy of the GNU General Public License |
| // along with this program; if not, write to the Free Software |
| // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| // |
| #ifndef _PORTABLE_PERF_ANALYZER_HH |
| #define _PORTABLE_PERF_ANALYZER_HH |
| |
| #include "utilities.h" |
| #include "timers/portable_timer.hh" |
| |
| template <class Action> |
| class Portable_Perf_Analyzer{ |
| public: |
| Portable_Perf_Analyzer( void ):_nb_calc(1),_nb_init(1),_chronos(){ |
| MESSAGE("Portable_Perf_Analyzer Ctor"); |
| }; |
| Portable_Perf_Analyzer( const Portable_Perf_Analyzer & ){ |
| INFOS("Copy Ctor not implemented"); |
| exit(0); |
| }; |
| ~Portable_Perf_Analyzer( void ){ |
| MESSAGE("Portable_Perf_Analyzer Dtor"); |
| }; |
| |
| |
| |
| inline double eval_mflops(int size) |
| { |
| |
| Action action(size); |
| |
| // double time_baseline = time_init(action); |
| // while (time_baseline < MIN_TIME_INIT) |
| // { |
| // _nb_init *= 2; |
| // time_baseline = time_init(action); |
| // } |
| // |
| // // optimize |
| // for (int i=1; i<NB_TRIES; ++i) |
| // time_baseline = std::min(time_baseline, time_init(action)); |
| // |
| // time_baseline = time_baseline/(double(_nb_init)); |
| |
| double time_action = time_calculate(action); |
| while (time_action < MIN_TIME) |
| { |
| _nb_calc *= 2; |
| time_action = time_calculate(action); |
| } |
| |
| // optimize |
| for (int i=1; i<NB_TRIES; ++i) |
| time_action = std::min(time_action, time_calculate(action)); |
| |
| // INFOS("size="<<size); |
| // INFOS("_nb_init="<<_nb_init); |
| // INFOS("_nb_calc="<<_nb_calc); |
| |
| time_action = time_action / (double(_nb_calc)); |
| |
| action.check_result(); |
| |
| |
| double time_baseline = time_init(action); |
| for (int i=1; i<NB_TRIES; ++i) |
| time_baseline = std::min(time_baseline, time_init(action)); |
| time_baseline = time_baseline/(double(_nb_init)); |
| |
| |
| |
| // INFOS("time_baseline="<<time_baseline); |
| // INFOS("time_action="<<time_action); |
| |
| time_action = time_action - time_baseline; |
| |
| // INFOS("time_corrected="<<time_action); |
| |
| return action.nb_op_base()/(time_action*1000000.0); |
| } |
| |
| inline double time_init(Action & action) |
| { |
| // time measurement |
| _chronos.start(); |
| for (int ii=0; ii<_nb_init; ii++) |
| action.initialize(); |
| _chronos.stop(); |
| return _chronos.user_time(); |
| } |
| |
| |
| inline double time_calculate(Action & action) |
| { |
| // time measurement |
| _chronos.start(); |
| for (int ii=0;ii<_nb_calc;ii++) |
| { |
| action.initialize(); |
| action.calculate(); |
| } |
| _chronos.stop(); |
| return _chronos.user_time(); |
| } |
| |
| unsigned long long get_nb_calc( void ) |
| { |
| return _nb_calc; |
| } |
| |
| |
| private: |
| unsigned long long _nb_calc; |
| unsigned long long _nb_init; |
| Portable_Timer _chronos; |
| |
| }; |
| |
| #endif //_PORTABLE_PERF_ANALYZER_HH |