56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
//---------------------------------------------------------------------------//
|
|
// 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;
|
|
}
|