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//---------------------------------------------------------------------------//
// Copyright (c) 2015 Jakub Szuppe <j.szuppe@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 <iostream>
#include <algorithm>
#include <vector>
#include <bolt/cl/copy.h>
#include <bolt/cl/device_vector.h>
#include <bolt/cl/max_element.h>
#include "perf.hpp"
int rand_int()
{
return static_cast<int>(rand() % 10000000);
}
int main(int argc, char *argv[])
{
perf_parse_args(argc, argv);
std::cout << "size: " << PERF_N << std::endl;
bolt::cl::control ctrl = bolt::cl::control::getDefault();
::cl::Device device = ctrl.getDevice();
std::cout << "device: " << device.getInfo<CL_DEVICE_NAME>() << std::endl;
// create host vector
std::vector<int> host_vec = generate_random_vector<int>(PERF_N);
// create device vectors
bolt::cl::device_vector<int> device_vec(PERF_N);
// transfer data to the device
bolt::cl::copy(host_vec.begin(), host_vec.end(), device_vec.begin());
bolt::cl::device_vector<int>::iterator max_iter = device_vec.begin();
perf_timer t;
for(size_t trial = 0; trial < PERF_TRIALS; trial++){
t.start();
max_iter = bolt::cl::max_element(device_vec.begin(), device_vec.end());
t.stop();
}
int device_max = *max_iter;
std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
std::cout << "max: " << device_max << std::endl;
// verify max is correct
int host_max = *std::max_element(host_vec.begin(), host_vec.end());
if(device_max != host_max){
std::cout << "ERROR: "
<< "device_max (" << device_max << ") "
<< "!= "
<< "host_max (" << host_max << ")"
<< std::endl;
return -1;
}
return 0;
}
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