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 <cmath>
12 #include <vector>
13 #include <algorithm>
14 #include <iostream>
15
16 #include <boost/compute/system.hpp>
17 #include <boost/compute/algorithm/merge.hpp>
18 #include <boost/compute/container/vector.hpp>
19
20 #include "perf.hpp"
21
main(int argc,char * argv[])22 int main(int argc, char *argv[])
23 {
24 perf_parse_args(argc, argv);
25
26 std::cout << "size: " << PERF_N << std::endl;
27
28 boost::compute::device device = boost::compute::system::default_device();
29 boost::compute::context context(device);
30 boost::compute::command_queue queue(context, device);
31 std::cout << "device: " << device.name() << std::endl;
32
33 std::vector<int> v1 = generate_random_vector<int>(std::floor(PERF_N / 2.0));
34 std::vector<int> v2 = generate_random_vector<int>(std::ceil(PERF_N / 2.0));
35 std::vector<int> v3(PERF_N);
36
37 std::sort(v1.begin(), v1.end());
38 std::sort(v2.begin(), v2.end());
39
40 boost::compute::vector<int> gpu_v1(v1.begin(), v1.end(), queue);
41 boost::compute::vector<int> gpu_v2(v2.begin(), v2.end(), queue);
42 boost::compute::vector<int> gpu_v3(PERF_N, context);
43
44 perf_timer t;
45 for(size_t trial = 0; trial < PERF_TRIALS; trial++){
46 t.start();
47 boost::compute::merge(gpu_v1.begin(), gpu_v1.end(),
48 gpu_v2.begin(), gpu_v2.end(),
49 gpu_v3.begin(),
50 queue
51 );
52 queue.finish();
53 t.stop();
54 }
55 std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
56
57 std::vector<int> check_v3(PERF_N);
58 boost::compute::copy(gpu_v3.begin(), gpu_v3.end(), check_v3.begin(), queue);
59 queue.finish();
60
61 std::merge(v1.begin(), v1.end(), v2.begin(), v2.end(), v3.begin());
62 bool ok = std::equal(check_v3.begin(), check_v3.end(), v3.begin());
63 if(!ok){
64 std::cerr << "ERROR: merged ranges different" << std::endl;
65 return -1;
66 }
67
68 return 0;
69 }
70