1 /* Copyright (c) 2017-2022. 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/kernel/ProfileBuilder.hpp"
7 #include "simgrid/s4u.hpp"
9 /* This example demonstrates how to attach a profile to a host or a link, to specify external changes to the resource
10 * speed. The first way to do so is to use a file in the XML, while the second is to use the programmatic interface. */
12 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_platform_profile, "Messages specific for this s4u example");
13 namespace sg4 = simgrid::s4u;
17 const auto* jupiter = sg4::Host::by_name("Jupiter");
18 const auto* fafard = sg4::Host::by_name("Fafard");
19 const auto* lilibeth = sg4::Host::by_name("Lilibeth");
20 const auto* link1 = sg4::Link::by_name("1");
21 const auto* link2 = sg4::Link::by_name("2");
23 std::vector<sg4::Link*> links;
25 jupiter->route_to(fafard, links, &lat);
28 for (const auto* l : links)
29 path += (path.empty() ? "" : ", ") + std::string("link '") + l->get_name() + std::string("'");
30 XBT_INFO("Path from Jupiter to Fafard: %s (latency: %fs).", path.c_str(), lat);
32 for (int i = 0; i < 10; i++) {
33 XBT_INFO("Fafard: %.0fMflops, Jupiter: %4.0fMflops, Lilibeth: %3.1fMflops, Link1: (%.2fMB/s %.0fms), Link2: "
35 fafard->get_speed() * fafard->get_available_speed() / 1000000,
36 jupiter->get_speed() * jupiter->get_available_speed() / 1000000,
37 lilibeth->get_speed() * lilibeth->get_available_speed() / 1000000, link1->get_bandwidth() / 1000,
38 link1->get_latency() * 1000, link2->get_bandwidth() / 1000, link2->get_latency() * 1000);
39 sg4::this_actor::sleep_for(1);
43 int main(int argc, char* argv[])
45 sg4::Engine e(&argc, argv);
47 xbt_assert(argc > 1, "Usage: %s platform_file\n\tExample: %s platform.xml\n", argv[0], argv[0]);
49 e.load_platform(argv[1]);
51 // Add a new host programmatically, and attach a simple speed profile to it (alternate between full and half speed
54 ->create_host("Lilibeth", 25e6)
55 ->set_speed_profile(simgrid::kernel::profile::ProfileBuilder::from_string("lilibeth_profile", R"(
62 // Add a watcher of the changes
63 sg4::Actor::create("watcher", e.host_by_name("Fafard"), watcher);