1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@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 <vector>
12 #include <cstdlib>
13 #include <iostream>
14
15 #include <boost/compute.hpp>
16
main(int argc,char * argv[])17 int main(int argc, char *argv[])
18 {
19 size_t size = 1000;
20 if(argc >= 2){
21 size = boost::lexical_cast<size_t>(argv[1]);
22 }
23
24 boost::compute::device device = boost::compute::system::default_device();
25 boost::compute::context context(device);
26
27 boost::compute::command_queue::properties
28 properties = boost::compute::command_queue::enable_profiling;
29 boost::compute::command_queue queue(context, device, properties);
30
31 std::vector<int> host_vector(size);
32 std::generate(host_vector.begin(), host_vector.end(), rand);
33
34 boost::compute::vector<int> device_vector(host_vector.size(), context);
35
36 boost::compute::future<void> future =
37 boost::compute::copy_async(host_vector.begin(),
38 host_vector.end(),
39 device_vector.begin(),
40 queue);
41
42 // wait for copy to finish
43 future.wait();
44
45 // get elapsed time in nanoseconds
46 size_t elapsed =
47 future.get_event().duration<boost::chrono::nanoseconds>().count();
48
49 std::cout << "time: " << elapsed / 1e6 << " ms" << std::endl;
50
51 float rate = (float(size * sizeof(int)) / elapsed) * 1000.f;
52 std::cout << "rate: " << rate << " MB/s" << std::endl;
53
54 return 0;
55 }
56