ceph/src/boost/libs/compute/perf/perf_bolt_exclusive_scan.cpp

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2015 Jakub Szuppe <j.szuppe@gmail.com>
   3 //
   4 // Distributed under the Boost Software License, Version 1.0
   5 // See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt
   7 //
   8 // See http://boostorg.github.com/compute for more information.
   9 //---------------------------------------------------------------------------//
  10
  11 #include <iostream>
  12 #include <algorithm>
  13 #include <vector>
  14
  15 #include <bolt/cl/scan.h>
  16 #include <bolt/cl/copy.h>
  17 #include <bolt/cl/device_vector.h>
  18
  19 #include "perf.hpp"
  20
  21 int main(int argc, char *argv[])
  22 {
  23     perf_parse_args(argc, argv);
  24
  25     std::cout << "size: " << PERF_N << std::endl;
  26
  27     bolt::cl::control ctrl = bolt::cl::control::getDefault();
  28     ::cl::Device device = ctrl.getDevice();
  29     std::cout << "device: " << device.getInfo<CL_DEVICE_NAME>() << std::endl;
  30
  31     // create vector of random numbers on the host
  32     std::vector<int> h_vec = generate_random_vector<int>(PERF_N);
  33
  34     // create device vector
  35     bolt::cl::device_vector<int> d_vec(PERF_N);
  36
  37     perf_timer t;
  38     for(size_t trial = 0; trial < PERF_TRIALS; trial++){
  39         // transfer data to the device
  40         bolt::cl::copy(h_vec.begin(), h_vec.end(), d_vec.begin());
  41
  42         t.start();
  43         bolt::cl::exclusive_scan(d_vec.begin(), d_vec.end(), d_vec.begin());
  44         t.stop();
  45     }
  46     std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
  47
  48     // transfer data back to host
  49     bolt::cl::copy(d_vec.begin(), d_vec.end(), h_vec.begin());
  50
  51     return 0;
  52 }