1 /* Copyright (c) 2019-2022. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "simgrid/s4u.hpp"
7 #include "xbt/config.hpp"
10 #include "src/kernel/resource/WifiLinkImpl.hpp"
12 XBT_LOG_NEW_DEFAULT_CATEGORY(simulator, "[usage] wifi_usage <platform-file>");
14 void run_ping_test(const std::vector<std::pair<std::string,std::string>>& mboxes, int data_size);
16 /* We need a separate actor so that it can sleep after each test */
17 static void main_dispatcher()
20 const std::vector<std::pair<std::string, std::string>> flows = {
21 {"Station 1", "Station 2"},
22 {"Station 3", "Station 4"},
23 {"Station 5", "Station 6"},
24 {"Station 7", "Station 8"},
25 {"Station 9", "Station 10"},
26 {"Station 11", "Station 12"},
27 {"Station 13", "Station 14"},
28 {"Station 15", "Station 16"},
29 {"Station 17", "Station 18"},
30 {"Station 19", "Station 20"},
31 {"Station 21", "Station 22"},
34 XBT_INFO("1/r_STA1 * rho_STA1 <= 1 (there is no cross-traffic)");
35 XBT_INFO("22 concurrent flows, decay model deactivated, we have 54Mbps to share between the flows");
36 XBT_INFO("We should thus have:");
37 XBT_INFO(" mu = 1 / [ 1/22 * (1/54Mbps)*22 ] = 54000000");
38 XBT_INFO(" simulation_time = 100000*8 / (mu/22) = 0.3259259259259259 (rounded to 0.325926s in SimGrid)");
40 run_ping_test(flows, 100000);
42 XBT_INFO("1/r_STA1 * rho_STA1 <= 1 (there is no cross-traffic)");
43 XBT_INFO("22 concurrent flows, decay model activated, we have 54Mbps to share between the flows, but the number of concurrent flows is above the limit (20)");
44 XBT_INFO("We should thus have:");
45 XBT_INFO("Maximum throughput of the link reduced by:");
46 XBT_INFO("updated link capacity = ( 5678270 + (22-20) * -5424 ) / 5678270 =~ 0.998086");
47 XBT_INFO(" mu = 1 / [ 1/22 * (1/54Mbps*0.998086)*22 ] = 53896644");
48 XBT_INFO(" simulation_time = 100000*8 / (mu/22) = 0.3265509444335718 (rounded to 0.326550 in SimGrid)");
50 auto* l = (simgrid::kernel::resource::WifiLinkImpl*)simgrid::s4u::Link::by_name("AP1")->get_impl();
52 run_ping_test(flows, 100000);
55 int main(int argc, char** argv)
57 simgrid::s4u::Engine engine(&argc, argv);
58 engine.load_platform(argv[1]);
59 simgrid::s4u::Actor::create("dispatcher", engine.host_by_name("node1"), main_dispatcher);
65 void run_ping_test(const std::vector<std::pair<std::string,std::string>>& mboxes, int data_size)
67 auto* mailbox = simgrid::s4u::Mailbox::by_name("Test");
68 for(auto pair : mboxes) {
69 simgrid::s4u::Actor::create("sender", simgrid::s4u::Host::by_name(pair.first.c_str()), [mailbox, pair, data_size]() {
70 double start_time = simgrid::s4u::Engine::get_clock();
71 static std::string message = "message";
72 mailbox->put(&message, data_size);
73 double end_time = simgrid::s4u::Engine::get_clock();
74 XBT_INFO("Actual result: Sending %d bytes from '%s' to '%s' takes %f seconds.", data_size,
75 simgrid::s4u::this_actor::get_host()->get_cname(), pair.second.c_str(), end_time - start_time);
77 simgrid::s4u::Actor::create("receiver", simgrid::s4u::Host::by_name(pair.second.c_str()),
78 [mailbox]() { mailbox->get<std::string>(); });
79 auto* l = (simgrid::kernel::resource::WifiLinkImpl*)simgrid::s4u::Link::by_name("AP1")->get_impl();
80 for(auto i=1; i<=22; i++) {
81 l->set_host_rate(simgrid::s4u::Host::by_name("Station "+std::to_string(i)), 0);
84 simgrid::s4u::this_actor::sleep_for(10);