69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
//---------------------------------------------------------------------------//
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// Copyright (c) 2014 Roshan <thisisroshansmail@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 <algorithm>
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#include <iostream>
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#include <numeric>
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#include <vector>
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#include <boost/compute/system.hpp>
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#include <boost/compute/lambda.hpp>
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#include <boost/compute/algorithm/partition.hpp>
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#include <boost/compute/algorithm/partition_point.hpp>
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#include <boost/compute/container/vector.hpp>
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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() / double(RAND_MAX)) * 25.0);
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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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// setup context and queue for the default device
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boost::compute::device device = boost::compute::system::default_device();
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boost::compute::context context(device);
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boost::compute::command_queue queue(context, device);
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std::cout << "device: " << device.name() << std::endl;
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// create vector of random numbers on the host
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std::vector<int> host_vector(PERF_N);
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std::generate(host_vector.begin(), host_vector.end(), rand_int);
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// create vector on the device and copy the data
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boost::compute::vector<int> device_vector(PERF_N, context);
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boost::compute::copy(
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host_vector.begin(), host_vector.end(), device_vector.begin(), queue
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);
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using boost::compute::_1;
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boost::compute::partition(
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device_vector.begin(), device_vector.end(), _1 < 20, queue
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);
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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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boost::compute::partition_point(
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device_vector.begin(), device_vector.end(), _1 < 20, queue
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);
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queue.finish();
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t.stop();
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}
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std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
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return 0;
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}
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