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- //---------------------------------------------------------------------------//
- // 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;
- }
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