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Diffstat (limited to 'btl/generic_bench/timers/portable_perf_analyzer.hh')
-rw-r--r-- | btl/generic_bench/timers/portable_perf_analyzer.hh | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/btl/generic_bench/timers/portable_perf_analyzer.hh b/btl/generic_bench/timers/portable_perf_analyzer.hh new file mode 100644 index 0000000..b207bde --- /dev/null +++ b/btl/generic_bench/timers/portable_perf_analyzer.hh @@ -0,0 +1,110 @@ +//===================================================== +// 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> +// Copyright (C) 2011 Andrea Arteaga <andyspiros@gmail.com> +//===================================================== +// +// 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" +#include <iomanip> + +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, bool silent = false) + { + Action action(size); + + while (m_time_action < MIN_TIME) { + _nb_calc = _nb_calc ? 2*_nb_calc : 1; + action.initialize(); + m_time_action = time_calculate(action); + } + + // optimize + for (int i=1; i<BtlConfig::Instance.tries; ++i) + { + Action _action(size); + if (!silent) { + if (_action.nb_op_base()*_nb_calc < 0) + std::cout << " { op*calc = " << _action.nb_op_base()*_nb_calc << " } " << std::flush; + 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 (int ii=0; ii<_nb_calc; ii++) + { + action.calculate(); + } + _chronos.stop(); + + double user_time = _chronos.user_time(); + if (user_time < 0) { + std::cout << " { error: nb=" << _nb_calc << ", time=" << user_time << " } " << std::flush; + } + return 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 + |