70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
//---------------------------------------------------------------------------//
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// Copyright (c) 2015 Jakub Szuppe <j.szuppe@gmail.com>
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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// See http://boostorg.github.com/compute for more information.
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//---------------------------------------------------------------------------//
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#include <iostream>
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#include <algorithm>
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#include <vector>
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#include <bolt/cl/copy.h>
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#include <bolt/cl/device_vector.h>
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#include <bolt/cl/max_element.h>
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#include "perf.hpp"
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int rand_int()
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{
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return static_cast<int>(rand() % 10000000);
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}
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int main(int argc, char *argv[])
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{
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perf_parse_args(argc, argv);
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std::cout << "size: " << PERF_N << std::endl;
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bolt::cl::control ctrl = bolt::cl::control::getDefault();
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::cl::Device device = ctrl.getDevice();
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std::cout << "device: " << device.getInfo<CL_DEVICE_NAME>() << std::endl;
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// create host vector
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std::vector<int> host_vec = generate_random_vector<int>(PERF_N);
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// create device vectors
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bolt::cl::device_vector<int> device_vec(PERF_N);
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// transfer data to the device
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bolt::cl::copy(host_vec.begin(), host_vec.end(), device_vec.begin());
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bolt::cl::device_vector<int>::iterator max_iter = device_vec.begin();
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perf_timer t;
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for(size_t trial = 0; trial < PERF_TRIALS; trial++){
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t.start();
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max_iter = bolt::cl::max_element(device_vec.begin(), device_vec.end());
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t.stop();
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}
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int device_max = *max_iter;
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std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
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std::cout << "max: " << device_max << std::endl;
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// verify max is correct
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int host_max = *std::max_element(host_vec.begin(), host_vec.end());
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if(device_max != host_max){
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std::cout << "ERROR: "
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<< "device_max (" << device_max << ") "
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<< "!= "
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<< "host_max (" << host_max << ")"
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<< std::endl;
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return -1;
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}
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return 0;
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}
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