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//=====================================================
// 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
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