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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 <cstdlib>
#include <iostream>
#include <thrust/copy.h>
#include <thrust/device_vector.h>
#include <thrust/generate.h>
#include <thrust/host_vector.h>
#include <thrust/partition.h>
#include "perf.hpp"
int rand_int()
{
return static_cast<int>((rand() / double(RAND_MAX)) * 25.0);
}
struct less_than_ten : public thrust::unary_function<bool, int>
{
__device__ bool operator()(int x) const
{
return x < 10;
}
};
int main(int argc, char *argv[])
{
perf_parse_args(argc, argv);
std::cout << "size: " << PERF_N << std::endl;
thrust::host_vector<int> h_vec(PERF_N);
std::generate(h_vec.begin(), h_vec.end(), rand_int);
thrust::device_vector<int> d_vec(PERF_N);
perf_timer t;
for(size_t trial = 0; trial < PERF_TRIALS; trial++){
d_vec = h_vec;
t.start();
thrust::partition(
d_vec.begin(), d_vec.end(), less_than_ten()
);
cudaDeviceSynchronize();
t.stop();
}
std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
return 0;
}
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