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- //---------------------------------------------------------------------------//
- // Copyright (c) 2014 Roshan <thisisroshansmail@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 <algorithm>
- #include <iostream>
- #include <numeric>
- #include <vector>
- #include <boost/compute/system.hpp>
- #include <boost/compute/algorithm/set_union.hpp>
- #include <boost/compute/container/vector.hpp>
- #include "perf.hpp"
- int rand_int()
- {
- return static_cast<int>((rand() / double(RAND_MAX)) * 25.0);
- }
- int main(int argc, char *argv[])
- {
- perf_parse_args(argc, argv);
- std::cout << "size: " << PERF_N << std::endl;
- // setup context and queue for the default device
- boost::compute::device device = boost::compute::system::default_device();
- boost::compute::context context(device);
- boost::compute::command_queue queue(context, device);
- std::cout << "device: " << device.name() << std::endl;
- // create vectors of random numbers on the host
- std::vector<int> v1(std::floor(PERF_N / 2.0));
- std::vector<int> v2(std::ceil(PERF_N / 2.0));
- std::generate(v1.begin(), v1.end(), rand_int);
- std::generate(v2.begin(), v2.end(), rand_int);
- std::sort(v1.begin(), v1.end());
- std::sort(v2.begin(), v2.end());
- // create vectors on the device and copy the data
- boost::compute::vector<int> gpu_v1(std::floor(PERF_N / 2.0), context);
- boost::compute::vector<int> gpu_v2(std::ceil(PERF_N / 2.0), context);
- boost::compute::copy(
- v1.begin(), v1.end(), gpu_v1.begin(), queue
- );
- boost::compute::copy(
- v2.begin(), v2.end(), gpu_v2.begin(), queue
- );
- boost::compute::vector<int> gpu_v3(PERF_N, context);
- boost::compute::vector<int>::iterator gpu_v3_end;
- perf_timer t;
- for(size_t trial = 0; trial < PERF_TRIALS; trial++){
- t.start();
- gpu_v3_end = boost::compute::set_union(
- gpu_v1.begin(), gpu_v1.end(),
- gpu_v2.begin(), gpu_v2.end(),
- gpu_v3.begin(), queue
- );
- queue.finish();
- t.stop();
- }
- std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
- std::cout << "size: " << std::distance(gpu_v3.begin(), gpu_v3_end) << std::endl;
- return 0;
- }
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