gemv_common.h File Reference

#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <functional>
#include "eigen_src/Eigen/Core"
#include "../BenchTimer.h"

Go to the source code of this file.

Typedefs
typedef SCALAR	Scalar
typedef Matrix< Scalar, Dynamic, Dynamic >	Mat
typedef Matrix< Scalar, Dynamic, 1 >	Vec

Functions
template<typename Func >
EIGEN_DONT_INLINE double	bench (long m, long n, Func &f)
template<typename Func >
int	main_gemv (int argc, char **argv, Func &f)

Typedef Documentation

Mat

typedef Matrix<Scalar, Dynamic, Dynamic> Mat

Scalar

typedef SCALAR Scalar

Vec

typedef Matrix<Scalar, Dynamic, 1> Vec

Function Documentation

bench()

template<typename Func >

EIGEN_DONT_INLINE double bench	(	long	m,
		long	n,
		Func &	f
	)

                                                        {
  Mat A(m, n);
  Vec B(n);
  Vec C(m);
  A.setRandom();
  B.setRandom();
  C.setRandom();
 
  BenchTimer t;
 
  double up = 1e8 / sizeof(Scalar);
  double tm0 = 4, tm1 = 10;
  if (NumTraits<Scalar>::IsComplex) {
    up /= 4;
    tm0 = 2;
    tm1 = 4;
  }
 
  double flops = 2. * m * n;
  long rep = std::max(1., std::min(100., up / flops));
  long tries = std::max(tm0, std::min(tm1, up / flops));
 
  BENCH(t, tries, rep, f(A, B, C));
 
  return 1e-9 * rep * flops / t.best();
}

References BENCH, e(), f(), m, max, min, n, Eigen::PlainObjectBase< Derived >::setRandom(), and plotPSD::t.

Referenced by main_gemv().

main_gemv()

template<typename Func >

int main_gemv	(	int	argc,
		char **	argv,
		Func &	f
	)

                                              {
  std::vector<double> results;
 
  std::string filename = std::string("gemv_settings.txt");
  if (argc > 1) filename = std::string(argv[1]);
  std::ifstream settings(filename);
  long m, n;
  while (settings >> m >> n) {
    // std::cerr << "  Testing " << m << " " << n << std::endl;
    results.push_back(bench(m, n, f));
  }
 
  std::cout << RowVectorXd::Map(results.data(), results.size());
 
  return 0;
}

References bench(), f(), MergeRestartFiles::filename, m, n, results, and oomph::Global_string_for_annotation::string().

Referenced by main().