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/*
* This file is a part of TiledArray.
* Copyright (C) 2013 Virginia Tech
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <iostream>
#include <tiledarray.h>
int main(int argc, char** argv) {
// Get command line arguments
if(argc < 2) {
std::cout << "Usage: eigen matrix_size [repetitions]\n";
return 0;
}
const long matrix_size = atol(argv[1]);
if (matrix_size <= 0) {
std::cerr << "Error: matrix size must be greater than zero.\n";
return 1;
}
const long repeat = (argc >= 3 ? atol(argv[2]) : 5);
if (repeat <= 0) {
std::cerr << "Error: number of repetitions must be greater than zero.\n";
return 1;
}
std::cout << "\nMatrix size = " << matrix_size << "x" << matrix_size
<< "\nMemory per matrix = " << double(matrix_size * matrix_size * sizeof(double)) / 1.0e9
<< " GB\n";
// Construct matrices
Eigen::MatrixXd a(matrix_size, matrix_size);
Eigen::MatrixXd b(matrix_size, matrix_size);
Eigen::MatrixXd c(matrix_size, matrix_size);
a.fill(1.0);
b.fill(1.0);
c.fill(0.0);
// Start clock
const double wall_time_start = madness::wall_time();
// Do matrix multiplcation
for(int i = 0; i < repeat; ++i) {
c.noalias() = 1.0 * a * b + 0.0 * c;
}
// Stop clock
const double wall_time_stop = madness::wall_time();
std::cout << "Average wall time = " << (wall_time_stop - wall_time_start) / double(repeat)
<< "\nAverage GFLOPS = " << double(repeat) * 2.0 * double(matrix_size *
matrix_size * matrix_size) / (wall_time_stop - wall_time_start) / 1.0e9 << "\n";
return 0;
}
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