| //===================================================== |
| // 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 |
| // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> |
| //===================================================== |
| // |
| // 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( ):_nb_calc(0), m_time_action(0), _chronos(){ |
| MESSAGE("Portable_Perf_Analyzer Ctor"); |
| }; |
| Portable_Perf_Analyzer( const Portable_Perf_Analyzer & ){ |
| INFOS("Copy Ctor not implemented"); |
| exit(0); |
| }; |
| ~Portable_Perf_Analyzer(){ |
| MESSAGE("Portable_Perf_Analyzer Dtor"); |
| }; |
| |
| BTL_DONT_INLINE double eval_mflops(int size) |
| { |
| Action action(size); |
| |
| // action.initialize(); |
| // time_action = time_calculate(action); |
| while (m_time_action < MIN_TIME) |
| { |
| if(_nb_calc==0) _nb_calc = 1; |
| else _nb_calc *= 2; |
| action.initialize(); |
| m_time_action = time_calculate(action); |
| } |
| |
| // optimize |
| for (int i=1; i<BtlConfig::Instance.tries; ++i) |
| { |
| Action _action(size); |
| std::cout << " " << _action.nb_op_base()*_nb_calc/(m_time_action*1e6) << " "; |
| _action.initialize(); |
| m_time_action = std::min(m_time_action, time_calculate(_action)); |
| } |
| |
| double time_action = m_time_action / (double(_nb_calc)); |
| |
| // check |
| if (BtlConfig::Instance.checkResults && size<128) |
| { |
| action.initialize(); |
| action.calculate(); |
| action.check_result(); |
| } |
| return action.nb_op_base()/(time_action*1e6); |
| } |
| |
| BTL_DONT_INLINE double time_calculate(Action & action) |
| { |
| // time measurement |
| action.calculate(); |
| _chronos.start(); |
| for (unsigned int ii=0;ii<_nb_calc;ii++) |
| { |
| action.calculate(); |
| } |
| _chronos.stop(); |
| return _chronos.user_time(); |
| } |
| |
| unsigned long long get_nb_calc() |
| { |
| return _nb_calc; |
| } |
| |
| |
| private: |
| unsigned long long _nb_calc; |
| double m_time_action; |
| Portable_Timer _chronos; |
| |
| }; |
| |
| #endif //_PORTABLE_PERF_ANALYZER_HH |
| |