1 //
2 // udp_client.cpp
3 // ~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9 //
10
11 #include <boost/asio/ip/udp.hpp>
12 #include <boost/date_time/posix_time/posix_time_types.hpp>
13 #include <algorithm>
14 #include <cstdio>
15 #include <cstdlib>
16 #include <cstring>
17 #include <vector>
18 #include "high_res_clock.hpp"
19
20 using boost::asio::ip::udp;
21 using boost::posix_time::ptime;
22 using boost::posix_time::microsec_clock;
23
24 const int num_samples = 100000;
25
main(int argc,char * argv[])26 int main(int argc, char* argv[])
27 {
28 if (argc != 6)
29 {
30 std::fprintf(stderr,
31 "Usage: udp_client <ip> <port1> "
32 "<nports> <bufsize> {spin|block}\n");
33 return 1;
34 }
35
36 const char* ip = argv[1];
37 unsigned short first_port = static_cast<unsigned short>(std::atoi(argv[2]));
38 unsigned short num_ports = static_cast<unsigned short>(std::atoi(argv[3]));
39 std::size_t buf_size = static_cast<std::size_t>(std::atoi(argv[4]));
40 bool spin = (std::strcmp(argv[5], "spin") == 0);
41
42 boost::asio::io_context io_context;
43
44 udp::socket socket(io_context, udp::endpoint(udp::v4(), 0));
45
46 if (spin)
47 {
48 socket.non_blocking(true);
49 }
50
51 udp::endpoint target(boost::asio::ip::make_address(ip), first_port);
52 unsigned short last_port = first_port + num_ports - 1;
53 std::vector<unsigned char> write_buf(buf_size);
54 std::vector<unsigned char> read_buf(buf_size);
55
56 ptime start = microsec_clock::universal_time();
57 boost::uint64_t start_hr = high_res_clock();
58
59 boost::uint64_t samples[num_samples];
60 for (int i = 0; i < num_samples; ++i)
61 {
62 boost::uint64_t t = high_res_clock();
63
64 boost::system::error_code ec;
65 socket.send_to(boost::asio::buffer(write_buf), target, 0, ec);
66
67 do socket.receive(boost::asio::buffer(read_buf), 0, ec);
68 while (ec == boost::asio::error::would_block);
69
70 samples[i] = high_res_clock() - t;
71
72 if (target.port() == last_port)
73 target.port(first_port);
74 else
75 target.port(target.port() + 1);
76 }
77
78 ptime stop = microsec_clock::universal_time();
79 boost::uint64_t stop_hr = high_res_clock();
80 boost::uint64_t elapsed_usec = (stop - start).total_microseconds();
81 boost::uint64_t elapsed_hr = stop_hr - start_hr;
82 double scale = 1.0 * elapsed_usec / elapsed_hr;
83
84 std::sort(samples, samples + num_samples);
85 std::printf(" 0.0%%\t%f\n", samples[0] * scale);
86 std::printf(" 0.1%%\t%f\n", samples[num_samples / 1000 - 1] * scale);
87 std::printf(" 1.0%%\t%f\n", samples[num_samples / 100 - 1] * scale);
88 std::printf(" 10.0%%\t%f\n", samples[num_samples / 10 - 1] * scale);
89 std::printf(" 20.0%%\t%f\n", samples[num_samples * 2 / 10 - 1] * scale);
90 std::printf(" 30.0%%\t%f\n", samples[num_samples * 3 / 10 - 1] * scale);
91 std::printf(" 40.0%%\t%f\n", samples[num_samples * 4 / 10 - 1] * scale);
92 std::printf(" 50.0%%\t%f\n", samples[num_samples * 5 / 10 - 1] * scale);
93 std::printf(" 60.0%%\t%f\n", samples[num_samples * 6 / 10 - 1] * scale);
94 std::printf(" 70.0%%\t%f\n", samples[num_samples * 7 / 10 - 1] * scale);
95 std::printf(" 80.0%%\t%f\n", samples[num_samples * 8 / 10 - 1] * scale);
96 std::printf(" 90.0%%\t%f\n", samples[num_samples * 9 / 10 - 1] * scale);
97 std::printf(" 99.0%%\t%f\n", samples[num_samples * 99 / 100 - 1] * scale);
98 std::printf(" 99.9%%\t%f\n", samples[num_samples * 999 / 1000 - 1] * scale);
99 std::printf("100.0%%\t%f\n", samples[num_samples - 1] * scale);
100
101 double total = 0.0;
102 for (int i = 0; i < num_samples; ++i) total += samples[i] * scale;
103 std::printf(" mean\t%f\n", total / num_samples);
104 }
105