1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
//---------------------------------------------------------------------------//
// 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 <vector>
#include <cstdlib>
#include <iostream>
#include <boost/compute.hpp>
int main(int argc, char *argv[])
{
size_t size = 1000;
if(argc >= 2){
size = boost::lexical_cast<size_t>(argv[1]);
}
boost::compute::device device = boost::compute::system::default_device();
boost::compute::context context(device);
boost::compute::command_queue::properties
properties = boost::compute::command_queue::enable_profiling;
boost::compute::command_queue queue(context, device, properties);
std::vector<int> host_vector(size);
std::generate(host_vector.begin(), host_vector.end(), rand);
boost::compute::vector<int> device_vector(host_vector.size(), context);
boost::compute::future<void> future =
boost::compute::copy_async(host_vector.begin(),
host_vector.end(),
device_vector.begin(),
queue);
// wait for copy to finish
future.wait();
// get elapsed time in nanoseconds
size_t elapsed =
future.get_event().duration<boost::chrono::nanoseconds>().count();
std::cout << "time: " << elapsed / 1e6 << " ms" << std::endl;
float rate = (float(size * sizeof(int)) / elapsed) * 1000.f;
std::cout << "rate: " << rate << " MB/s" << std::endl;
return 0;
}
|
