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      1 //=====================================================
      2 // File   :  x86_perf_analyzer.hh
      3 // Author :  L. Plagne <laurent.plagne (at) edf.fr)>
      4 // Copyright (C) EDF R&D,  mar dc 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 _X86_PERF_ANALYSER_HH
     21 #define _X86_PERF_ANALYSER_HH
     22 
     23 #include "x86_timer.hh"
     24 #include "bench_parameter.hh"
     25 
     26 template<class ACTION>
     27 class X86_Perf_Analyzer{
     28 public:
     29   X86_Perf_Analyzer( unsigned long long nb_sample=DEFAULT_NB_SAMPLE):_nb_sample(nb_sample),_chronos()
     30   {
     31     MESSAGE("X86_Perf_Analyzer Ctor");
     32     _chronos.find_frequency();
     33   };
     34   X86_Perf_Analyzer( const X86_Perf_Analyzer & ){
     35     INFOS("Copy Ctor not implemented");
     36     exit(0);
     37   };
     38   ~X86_Perf_Analyzer( void ){
     39     MESSAGE("X86_Perf_Analyzer Dtor");
     40   };
     41 
     42 
     43   inline double eval_mflops(int size)
     44   {
     45 
     46     ACTION action(size);
     47 
     48     int nb_loop=5;
     49     double calculate_time=0.0;
     50     double baseline_time=0.0;
     51 
     52     for (int j=0 ; j < nb_loop ; j++){
     53 
     54       _chronos.clear();
     55 
     56       for(int i=0 ; i < _nb_sample  ; i++)
     57       {
     58         _chronos.start();
     59         action.initialize();
     60         action.calculate();
     61         _chronos.stop();
     62         _chronos.add_get_click();
     63       }
     64 
     65       calculate_time += double(_chronos.get_shortest_clicks())/_chronos.frequency();
     66 
     67       if (j==0) action.check_result();
     68 
     69       _chronos.clear();
     70 
     71       for(int i=0 ; i < _nb_sample  ; i++)
     72       {
     73         _chronos.start();
     74         action.initialize();
     75         _chronos.stop();
     76         _chronos.add_get_click();
     77 
     78       }
     79 
     80       baseline_time+=double(_chronos.get_shortest_clicks())/_chronos.frequency();
     81 
     82     }
     83 
     84     double corrected_time = (calculate_time-baseline_time)/double(nb_loop);
     85 
     86 
     87 //     INFOS("_nb_sample="<<_nb_sample);
     88 //     INFOS("baseline_time="<<baseline_time);
     89 //     INFOS("calculate_time="<<calculate_time);
     90 //     INFOS("corrected_time="<<corrected_time);
     91 
     92 //    cout << size <<" "<<baseline_time<<" "<<calculate_time<<" "<<corrected_time<<" "<<action.nb_op_base() << endl;
     93 
     94     return action.nb_op_base()/(corrected_time*1000000.0);
     95     //return action.nb_op_base()/(calculate_time*1000000.0);
     96   }
     97 
     98 private:
     99 
    100   X86_Timer _chronos;
    101   unsigned long long _nb_sample;
    102 
    103 
    104 };
    105 
    106 
    107 
    108 #endif
    109