1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2014 Roshan <thisisroshansmail@gmail.com>
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 <iostream>
13 #include <numeric>
14 #include <vector>
15 
16 #include "perf.hpp"
17 
rand_int()18 int rand_int()
19 {
20     return static_cast<int>((rand() / double(RAND_MAX)) * 25.0);
21 }
22 
main(int argc,char * argv[])23 int main(int argc, char *argv[])
24 {
25     perf_parse_args(argc, argv);
26     std::cout << "size: " << PERF_N << std::endl;
27 
28     // create vector of random numbers on the host
29     std::vector<int> host_vector(PERF_N);
30     std::generate(host_vector.begin(), host_vector.end(), rand_int);
31 
32     std::vector<int> host_vector2(PERF_N);
33 
34     perf_timer t;
35     for(size_t trial = 0; trial < PERF_TRIALS; trial++){
36         t.start();
37         std::rotate_copy(host_vector.begin(), host_vector.begin()+(PERF_N/2), host_vector.end(), host_vector2.begin());
38         t.stop();
39     }
40     std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
41 
42     return 0;
43 }
44