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 <iostream> 13 #include <vector> 14 15 #include <thrust/count.h> 16 #include <thrust/host_vector.h> 17 #include <thrust/device_vector.h> 18 19 #include "perf.hpp" 20 rand_int()21int rand_int() 22 { 23 return static_cast<int>((rand() / double(RAND_MAX)) * 25.0); 24 } 25 main(int argc,char * argv[])26int main(int argc, char *argv[]) 27 { 28 perf_parse_args(argc, argv); 29 std::cout << "size: " << PERF_N << std::endl; 30 31 // create vector of random numbers on the host 32 thrust::host_vector<int> host_vector(PERF_N); 33 thrust::generate(host_vector.begin(), host_vector.end(), rand_int); 34 35 thrust::device_vector<int> v = host_vector; 36 37 size_t count = 0; 38 perf_timer t; 39 for(size_t trial = 0; trial < PERF_TRIALS; trial++){ 40 t.start(); 41 count = thrust::count(v.begin(), v.end(), 4); 42 cudaDeviceSynchronize(); 43 t.stop(); 44 } 45 std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl; 46 std::cout << "count: " << count << std::endl; 47 48 return 0; 49 } 50