99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
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//=====================================================
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// File : portable_perf_analyzer.hh
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// Author : L. Plagne <laurent.plagne@edf.fr)>
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// Copyright (C) EDF R&D, mar d<>c 3 18:59:35 CET 2002
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// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
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//=====================================================
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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#ifndef _PORTABLE_PERF_ANALYZER_HH
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#define _PORTABLE_PERF_ANALYZER_HH
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#include "utilities.h"
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#include "timers/portable_timer.hh"
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template <class Action>
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class Portable_Perf_Analyzer{
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public:
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Portable_Perf_Analyzer( void ):_nb_calc(1),_chronos(){
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MESSAGE("Portable_Perf_Analyzer Ctor");
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};
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Portable_Perf_Analyzer( const Portable_Perf_Analyzer & ){
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INFOS("Copy Ctor not implemented");
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exit(0);
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};
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~Portable_Perf_Analyzer( void ){
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MESSAGE("Portable_Perf_Analyzer Dtor");
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};
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inline double eval_mflops(int size)
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{
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Action action(size);
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double time_action = time_calculate(action);
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while (time_action < MIN_TIME)
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{
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_nb_calc *= 2;
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action.initialize();
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time_action = time_calculate(action);
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}
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// optimize
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for (int i=1; i<NB_TRIES; ++i)
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{
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action.initialize();
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time_action = std::min(time_action, time_calculate(action));
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}
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time_action = time_action / (double(_nb_calc));
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// check
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action.initialize();
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action.calculate();
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action.check_result();
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return action.nb_op_base()/(time_action*1000000.0);
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}
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double time_calculate(Action & action)
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{
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// time measurement
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_chronos.start();
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for (int ii=0;ii<_nb_calc;ii++)
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{
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action.calculate();
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}
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_chronos.stop();
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return _chronos.user_time();
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}
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unsigned long long get_nb_calc( void )
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{
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return _nb_calc;
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}
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private:
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unsigned long long _nb_calc;
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Portable_Timer _chronos;
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};
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#endif //_PORTABLE_PERF_ANALYZER_HH
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