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//
// udp_client.cpp
// ~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/asio/ip/udp.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <vector>
#include "high_res_clock.hpp"
using boost::asio::ip::udp;
using boost::posix_time::ptime;
using boost::posix_time::microsec_clock;
const int num_samples = 100000;
int main(int argc, char* argv[])
{
if (argc != 6)
{
std::fprintf(stderr,
"Usage: udp_client <ip> <port1> "
"<nports> <bufsize> {spin|block}\n");
return 1;
}
const char* ip = argv[1];
unsigned short first_port = static_cast<unsigned short>(std::atoi(argv[2]));
unsigned short num_ports = static_cast<unsigned short>(std::atoi(argv[3]));
std::size_t buf_size = static_cast<std::size_t>(std::atoi(argv[4]));
bool spin = (std::strcmp(argv[5], "spin") == 0);
boost::asio::io_service io_service;
udp::socket socket(io_service, udp::endpoint(udp::v4(), 0));
if (spin)
{
udp::socket::non_blocking_io nbio(true);
socket.io_control(nbio);
}
udp::endpoint target(boost::asio::ip::address::from_string(ip), first_port);
unsigned short last_port = first_port + num_ports - 1;
std::vector<unsigned char> write_buf(buf_size);
std::vector<unsigned char> read_buf(buf_size);
ptime start = microsec_clock::universal_time();
boost::uint64_t start_hr = high_res_clock();
boost::uint64_t samples[num_samples];
for (int i = 0; i < num_samples; ++i)
{
boost::uint64_t t = high_res_clock();
boost::system::error_code ec;
socket.send_to(boost::asio::buffer(write_buf), target, 0, ec);
do socket.receive(boost::asio::buffer(read_buf), 0, ec);
while (ec == boost::asio::error::would_block);
samples[i] = high_res_clock() - t;
if (target.port() == last_port)
target.port(first_port);
else
target.port(target.port() + 1);
}
ptime stop = microsec_clock::universal_time();
boost::uint64_t stop_hr = high_res_clock();
boost::uint64_t elapsed_usec = (stop - start).total_microseconds();
boost::uint64_t elapsed_hr = stop_hr - start_hr;
double scale = 1.0 * elapsed_usec / elapsed_hr;
std::sort(samples, samples + num_samples);
std::printf(" 0.0%%\t%f\n", samples[0] * scale);
std::printf(" 0.1%%\t%f\n", samples[num_samples / 1000 - 1] * scale);
std::printf(" 1.0%%\t%f\n", samples[num_samples / 100 - 1] * scale);
std::printf(" 10.0%%\t%f\n", samples[num_samples / 10 - 1] * scale);
std::printf(" 20.0%%\t%f\n", samples[num_samples * 2 / 10 - 1] * scale);
std::printf(" 30.0%%\t%f\n", samples[num_samples * 3 / 10 - 1] * scale);
std::printf(" 40.0%%\t%f\n", samples[num_samples * 4 / 10 - 1] * scale);
std::printf(" 50.0%%\t%f\n", samples[num_samples * 5 / 10 - 1] * scale);
std::printf(" 60.0%%\t%f\n", samples[num_samples * 6 / 10 - 1] * scale);
std::printf(" 70.0%%\t%f\n", samples[num_samples * 7 / 10 - 1] * scale);
std::printf(" 80.0%%\t%f\n", samples[num_samples * 8 / 10 - 1] * scale);
std::printf(" 90.0%%\t%f\n", samples[num_samples * 9 / 10 - 1] * scale);
std::printf(" 99.0%%\t%f\n", samples[num_samples * 99 / 100 - 1] * scale);
std::printf(" 99.9%%\t%f\n", samples[num_samples * 999 / 1000 - 1] * scale);
std::printf("100.0%%\t%f\n", samples[num_samples - 1] * scale);
double total = 0.0;
for (int i = 0; i < num_samples; ++i) total += samples[i] * scale;
std::printf(" mean\t%f\n", total / num_samples);
}
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