1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2014 Benoit
3 //
4 // Distributed under the Boost Software License, Version 1.0
5 // See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt
7 //
8 // See http://boostorg.github.com/compute for more information.
9 //---------------------------------------------------------------------------//
10 
11 #include <algorithm>
12 #include <cstdlib>
13 #include <iostream>
14 
15 #include <thrust/copy.h>
16 #include <thrust/device_vector.h>
17 #include <thrust/generate.h>
18 #include <thrust/host_vector.h>
19 #include <thrust/scan.h>
20 
21 #include "perf.hpp"
22 
main(int argc,char * argv[])23 int main(int argc, char *argv[])
24 {
25     perf_parse_args(argc, argv);
26 
27     std::cout << "size: " << PERF_N << std::endl;
28     thrust::host_vector<int> h_vec = generate_random_vector<int>(PERF_N);
29 
30     // transfer data to the device
31     thrust::device_vector<int> d_vec = h_vec;
32 
33     perf_timer t;
34     for(size_t trial = 0; trial < PERF_TRIALS; trial++){
35         d_vec = h_vec;
36 
37         t.start();
38         thrust::exclusive_scan(d_vec.begin(), d_vec.end(), d_vec.begin());
39         cudaDeviceSynchronize();
40         t.stop();
41     }
42     std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
43 
44     // transfer data back to host
45     thrust::copy(d_vec.begin(), d_vec.end(), h_vec.begin());
46 
47     return 0;
48 }
49