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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 <numeric>
#include <vector>
#include <boost/compute/system.hpp>
#include <boost/compute/algorithm/inner_product.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;
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;
std::vector<int> h1(PERF_N);
std::vector<int> h2(PERF_N);
std::generate(h1.begin(), h1.end(), rand_int);
std::generate(h2.begin(), h2.end(), rand_int);
// create vector on the device and copy the data
boost::compute::vector<int> d1(PERF_N, context);
boost::compute::vector<int> d2(PERF_N, context);
boost::compute::copy(h1.begin(), h1.end(), d1.begin(), queue);
boost::compute::copy(h2.begin(), h2.end(), d2.begin(), queue);
int product = 0;
perf_timer t;
for(size_t trial = 0; trial < PERF_TRIALS; trial++){
t.start();
product = boost::compute::inner_product(
d1.begin(), d1.end(), d2.begin(), int(0), queue
);
queue.finish();
t.stop();
}
std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
// verify product is correct
int host_product = std::inner_product(
h1.begin(), h1.end(), h2.begin(), int(0)
);
if(product != host_product){
std::cout << "ERROR: "
<< "device_product (" << product << ") "
<< "!= "
<< "host_product (" << host_product << ")"
<< std::endl;
return -1;
}
return 0;
}
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