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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 <algorithm>
#include <iostream>
#include <vector>
#include <boost/compute/system.hpp>
#include <boost/compute/algorithm/sort_by_key.hpp>
#include <boost/compute/algorithm/is_sorted.hpp>
#include <boost/compute/container/vector.hpp>
#include <boost/compute/types/fundamental.hpp>
#include "perf.hpp"
int main(int argc, char *argv[])
{
using boost::compute::int_;
using boost::compute::long_;
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 vector of random numbers on the host
std::vector<int_> host_keys(PERF_N);
std::generate(host_keys.begin(), host_keys.end(), rand);
std::vector<long_> host_values(PERF_N);
std::copy(host_keys.begin(), host_keys.end(), host_values.begin());
// create vector on the device and copy the data
boost::compute::vector<int_> device_keys(PERF_N, context);
boost::compute::vector<long_> device_values(PERF_N, context);
perf_timer t;
for(size_t trial = 0; trial < PERF_TRIALS; trial++){
boost::compute::copy(
host_keys.begin(), host_keys.end(), device_keys.begin(), queue
);
boost::compute::copy(
host_values.begin(), host_values.end(), device_values.begin(), queue
);
t.start();
// sort vector
boost::compute::sort_by_key(
device_keys.begin(), device_keys.end(), device_values.begin(), queue
);
queue.finish();
t.stop();
}
std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
// verify keys are sorted
if(!boost::compute::is_sorted(device_keys.begin(), device_keys.end(), queue)){
std::cout << "ERROR: is_sorted() returned false for the keys" << std::endl;
return -1;
}
// verify values are sorted
if(!boost::compute::is_sorted(device_values.begin(), device_values.end(), queue)){
std::cout << "ERROR: is_sorted() returned false for the values" << std::endl;
return -1;
}
return 0;
}
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