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bench.hh
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//=====================================================
// File : bench.hh
// Author : L. Plagne <laurent.plagne@edf.fr)>
// Copyright (C) EDF R&D, lun sep 30 14:23:16 CEST 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 BENCH_HH
#define BENCH_HH
#include "btl.hh"
#include "bench_parameter.hh"
#include <iostream>
#include "utilities.h"
#include "size_lin_log.hh"
#include "xy_file.hh"
#include <vector>
#include <string>
#include "timers/portable_perf_analyzer.hh"
// #include "timers/mixed_perf_analyzer.hh"
// #include "timers/x86_perf_analyzer.hh"
// #include "timers/STL_perf_analyzer.hh"
#ifdef HAVE_MKL
extern "C" void cblas_saxpy(const int, const float, const float*, const int, float *, const int);
#endif
using namespace std;
template <template<class> class Perf_Analyzer, class Action>
BTL_DONT_INLINE void bench( int size_min, int size_max, int nb_point )
{
if (BtlConfig::skipAction(Action::name()))
return;
string filename="bench_"+Action::name()+".dat";
INFOS("starting " <<filename);
// utilities
std::vector<double> tab_mflops(nb_point);
std::vector<int> tab_sizes(nb_point);
// matrices and vector size calculations
size_lin_log(nb_point,size_min,size_max,tab_sizes);
std::vector<int> oldSizes;
std::vector<double> oldFlops;
bool hasOldResults = read_xy_file(filename, oldSizes, oldFlops, true);
int oldi = oldSizes.size() - 1;
// loop on matrix size
Perf_Analyzer<Action> perf_action;
for (int i=nb_point-1;i>=0;i--)
{
//INFOS("size=" <<tab_sizes[i]<<" ("<<nb_point-i<<"/"<<nb_point<<")");
std::cout << " " << "size = " << tab_sizes[i] << " " << std::flush;
BTL_DISABLE_SSE_EXCEPTIONS();
#ifdef HAVE_MKL
{
float dummy;
cblas_saxpy(1,0,&dummy,1,&dummy,1);
}
#endif
tab_mflops[i] = perf_action.eval_mflops(tab_sizes[i]);
std::cout << tab_mflops[i];
if (hasOldResults)
{
while (oldi>=0 && oldSizes[oldi]>tab_sizes[i])
--oldi;
if (oldi>=0 && oldSizes[oldi]==tab_sizes[i])
{
if (oldFlops[oldi]<tab_mflops[i])
std::cout << "\t > ";
else
std::cout << "\t < ";
std::cout << oldFlops[oldi];
}
--oldi;
}
std::cout << " MFlops (" << nb_point-i << "/" << nb_point << ")" << std::endl;
}
if (!BtlConfig::Instance.overwriteResults)
{
if (hasOldResults)
{
// merge the two data
std::vector<int> newSizes;
std::vector<double> newFlops;
unsigned int i=0;
unsigned int j=0;
while (i<tab_sizes.size() && j<oldSizes.size())
{
if (tab_sizes[i] == oldSizes[j])
{
newSizes.push_back(tab_sizes[i]);
newFlops.push_back(std::max(tab_mflops[i], oldFlops[j]));
++i;
++j;
}
else if (tab_sizes[i] < oldSizes[j])
{
newSizes.push_back(tab_sizes[i]);
newFlops.push_back(tab_mflops[i]);
++i;
}
else
{
newSizes.push_back(oldSizes[j]);
newFlops.push_back(oldFlops[j]);
++j;
}
}
while (i<tab_sizes.size())
{
newSizes.push_back(tab_sizes[i]);
newFlops.push_back(tab_mflops[i]);
++i;
}
while (j<oldSizes.size())
{
newSizes.push_back(oldSizes[j]);
newFlops.push_back(oldFlops[j]);
++j;
}
tab_mflops = newFlops;
tab_sizes = newSizes;
}
}
// dump the result in a file :
dump_xy_file(tab_sizes,tab_mflops,filename);
}
// default Perf Analyzer
template <class Action>
BTL_DONT_INLINE void bench( int size_min, int size_max, int nb_point ){
// if the rdtsc is not available :
bench<Portable_Perf_Analyzer,Action>(size_min,size_max,nb_point);
// if the rdtsc is available :
// bench<Mixed_Perf_Analyzer,Action>(size_min,size_max,nb_point);
// Only for small problem size. Otherwise it will be too long
// bench<X86_Perf_Analyzer,Action>(size_min,size_max,nb_point);
// bench<STL_Perf_Analyzer,Action>(size_min,size_max,nb_point);
}
#endif

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