00001 //===================================================== 00002 // File : portable_perf_analyzer.hh 00003 // Author : L. Plagne <laurent.plagne@edf.fr)> 00004 // Copyright (C) EDF R&D, mar d�c 3 18:59:35 CET 2002 00005 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr> 00006 //===================================================== 00007 // 00008 // This program is free software; you can redistribute it and/or 00009 // modify it under the terms of the GNU General Public License 00010 // as published by the Free Software Foundation; either version 2 00011 // of the License, or (at your option) any later version. 00012 // 00013 // This program is distributed in the hope that it will be useful, 00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00016 // GNU General Public License for more details. 00017 // You should have received a copy of the GNU General Public License 00018 // along with this program; if not, write to the Free Software 00019 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00020 // 00021 #ifndef _PORTABLE_PERF_ANALYZER_HH 00022 #define _PORTABLE_PERF_ANALYZER_HH 00023 00024 #include "utilities.h" 00025 #include "timers/portable_timer.hh" 00026 00027 template <class Action> 00028 class Portable_Perf_Analyzer{ 00029 public: 00030 Portable_Perf_Analyzer( ):_nb_calc(0), m_time_action(0), _chronos(){ 00031 MESSAGE("Portable_Perf_Analyzer Ctor"); 00032 }; 00033 Portable_Perf_Analyzer( const Portable_Perf_Analyzer & ){ 00034 INFOS("Copy Ctor not implemented"); 00035 exit(0); 00036 }; 00037 ~Portable_Perf_Analyzer(){ 00038 MESSAGE("Portable_Perf_Analyzer Dtor"); 00039 }; 00040 00041 BTL_DONT_INLINE double eval_mflops(int size) 00042 { 00043 Action action(size); 00044 00045 // action.initialize(); 00046 // time_action = time_calculate(action); 00047 while (m_time_action < MIN_TIME) 00048 { 00049 if(_nb_calc==0) _nb_calc = 1; 00050 else _nb_calc *= 2; 00051 action.initialize(); 00052 m_time_action = time_calculate(action); 00053 } 00054 00055 // optimize 00056 for (int i=1; i<BtlConfig::Instance.tries; ++i) 00057 { 00058 Action _action(size); 00059 std::cout << " " << _action.nb_op_base()*_nb_calc/(m_time_action*1e6) << " "; 00060 _action.initialize(); 00061 m_time_action = std::min(m_time_action, time_calculate(_action)); 00062 } 00063 00064 double time_action = m_time_action / (double(_nb_calc)); 00065 00066 // check 00067 if (BtlConfig::Instance.checkResults && size<128) 00068 { 00069 action.initialize(); 00070 action.calculate(); 00071 action.check_result(); 00072 } 00073 return action.nb_op_base()/(time_action*1e6); 00074 } 00075 00076 BTL_DONT_INLINE double time_calculate(Action & action) 00077 { 00078 // time measurement 00079 action.calculate(); 00080 _chronos.start(); 00081 for (int ii=0;ii<_nb_calc;ii++) 00082 { 00083 action.calculate(); 00084 } 00085 _chronos.stop(); 00086 return _chronos.user_time(); 00087 } 00088 00089 unsigned long long get_nb_calc() 00090 { 00091 return _nb_calc; 00092 } 00093 00094 00095 private: 00096 unsigned long long _nb_calc; 00097 double m_time_action; 00098 Portable_Timer _chronos; 00099 00100 }; 00101 00102 #endif //_PORTABLE_PERF_ANALYZER_HH 00103