1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2014 Roshan <thisisroshansmail@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 <numeric>
14 #include <vector>
15
16 #include <boost/compute/system.hpp>
17 #include <boost/compute/algorithm/set_union.hpp>
18 #include <boost/compute/container/vector.hpp>
19
20 #include "perf.hpp"
21
rand_int()22 int rand_int()
23 {
24 return static_cast<int>((rand() / double(RAND_MAX)) * 25.0);
25 }
26
main(int argc,char * argv[])27 int main(int argc, char *argv[])
28 {
29 perf_parse_args(argc, argv);
30 std::cout << "size: " << PERF_N << std::endl;
31
32 // setup context and queue for the default device
33 boost::compute::device device = boost::compute::system::default_device();
34 boost::compute::context context(device);
35 boost::compute::command_queue queue(context, device);
36 std::cout << "device: " << device.name() << std::endl;
37
38 // create vectors of random numbers on the host
39 std::vector<int> v1(std::floor(PERF_N / 2.0));
40 std::vector<int> v2(std::ceil(PERF_N / 2.0));
41 std::generate(v1.begin(), v1.end(), rand_int);
42 std::generate(v2.begin(), v2.end(), rand_int);
43 std::sort(v1.begin(), v1.end());
44 std::sort(v2.begin(), v2.end());
45
46 // create vectors on the device and copy the data
47 boost::compute::vector<int> gpu_v1(std::floor(PERF_N / 2.0), context);
48 boost::compute::vector<int> gpu_v2(std::ceil(PERF_N / 2.0), context);
49
50 boost::compute::copy(
51 v1.begin(), v1.end(), gpu_v1.begin(), queue
52 );
53 boost::compute::copy(
54 v2.begin(), v2.end(), gpu_v2.begin(), queue
55 );
56
57 boost::compute::vector<int> gpu_v3(PERF_N, context);
58 boost::compute::vector<int>::iterator gpu_v3_end;
59
60 perf_timer t;
61 for(size_t trial = 0; trial < PERF_TRIALS; trial++){
62 t.start();
63 gpu_v3_end = boost::compute::set_union(
64 gpu_v1.begin(), gpu_v1.end(),
65 gpu_v2.begin(), gpu_v2.end(),
66 gpu_v3.begin(), queue
67 );
68 queue.finish();
69 t.stop();
70 }
71 std::cout << "time: " << t.min_time() / 1e6 << " ms" << std::endl;
72 std::cout << "size: " << std::distance(gpu_v3.begin(), gpu_v3_end) << std::endl;
73
74 return 0;
75 }
76