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- //---------------------------------------------------------------------------//
- // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
- //
- // Distributed under the Boost Software License, Version 1.0
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- //
- // See http://boostorg.github.com/compute for more information.
- //---------------------------------------------------------------------------//
- #include <algorithm>
- #include <iostream>
- #include <vector>
- #include "perf.hpp"
- float rand_float()
- {
- return (float(rand()) / float(RAND_MAX)) * 1000.f;
- }
- // y <- alpha * x + y
- void serial_saxpy(size_t n, float alpha, const float *x, float *y)
- {
- for(size_t i = 0; i < n; i++){
- y[i] = alpha * x[i] + y[i];
- }
- }
- int main(int argc, char *argv[])
- {
- perf_parse_args(argc, argv);
- std::cout << "size: " << PERF_N << std::endl;
- float alpha = 2.5f;
- std::vector<float> host_x(PERF_N);
- std::vector<float> host_y(PERF_N);
- std::generate(host_x.begin(), host_x.end(), rand_float);
- std::generate(host_y.begin(), host_y.end(), rand_float);
- perf_timer t;
- for(size_t trial = 0; trial < PERF_TRIALS; trial++){
- t.start();
- serial_saxpy(PERF_N, alpha, &host_x[0], &host_y[0]);
- t.stop();
- }
- std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
- return 0;
- }
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