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- //---------------------------------------------------------------------------//
- // Copyright (c) 2013 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.
- //---------------------------------------------------------------------------//
- //[time_copy_example
- #include <vector>
- #include <cstdlib>
- #include <iostream>
- #include <boost/compute/event.hpp>
- #include <boost/compute/system.hpp>
- #include <boost/compute/algorithm/copy.hpp>
- #include <boost/compute/async/future.hpp>
- #include <boost/compute/container/vector.hpp>
- namespace compute = boost::compute;
- int main()
- {
- // get the default device
- compute::device gpu = compute::system::default_device();
- // create context for default device
- compute::context context(gpu);
- // create command queue with profiling enabled
- compute::command_queue queue(
- context, gpu, compute::command_queue::enable_profiling
- );
- // generate random data on the host
- std::vector<int> host_vector(16000000);
- std::generate(host_vector.begin(), host_vector.end(), rand);
- // create a vector on the device
- compute::vector<int> device_vector(host_vector.size(), context);
- // copy data from the host to the device
- compute::future<void> future = compute::copy_async(
- host_vector.begin(), host_vector.end(), device_vector.begin(), queue
- );
- // wait for copy to finish
- future.wait();
- // get elapsed time from event profiling information
- boost::chrono::milliseconds duration =
- future.get_event().duration<boost::chrono::milliseconds>();
- // print elapsed time in milliseconds
- std::cout << "time: " << duration.count() << " ms" << std::endl;
- return 0;
- }
- //]
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