ceph/src/boost/libs/compute/perf/perf_thrust_reverse.cu

   1 //---------------------------------------------------------------------------//
   2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@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 <algorithm>
  12 #include <cstdlib>
  13 #include <iostream>
  14
  15 #include <thrust/copy.h>
  16 #include <thrust/device_vector.h>
  17 #include <thrust/generate.h>
  18 #include <thrust/host_vector.h>
  19 #include <thrust/reverse.h>
  20
  21 #include "perf.hpp"
  22
  23 int main(int argc, char *argv[])
  24 {
  25     perf_parse_args(argc, argv);
  26
  27     std::cout << "size: " << PERF_N << std::endl;
  28     thrust::host_vector<int> h_vec = generate_random_vector<int>(PERF_N);
  29
  30     // transfer data to the device
  31     thrust::device_vector<int> d_vec;
  32
  33     perf_timer t;
  34     for(size_t trial = 0; trial < PERF_TRIALS; trial++){
  35         d_vec = h_vec;
  36
  37         t.start();
  38         thrust::reverse(d_vec.begin(), d_vec.end());
  39         cudaDeviceSynchronize();
  40         t.stop();
  41     }
  42     std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
  43
  44     // transfer data back to host
  45     thrust::copy(d_vec.begin(), d_vec.end(), h_vec.begin());
  46
  47     return 0;
  48 }