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/* Copyright (c) 2017-2025. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "simgrid/kernel/ProfileBuilder.hpp"
#include "simgrid/s4u.hpp"
/* This example demonstrates how to attach a profile to a host or a link, to specify external changes to the resource
* speed. The first way to do so is to use a file in the XML, while the second is to use the programmatic interface. */
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_platform_profile, "Messages specific for this s4u example");
namespace sg4 = simgrid::s4u;
static void watcher()
{
const auto* jupiter = sg4::Host::by_name("Jupiter");
const auto* fafard = sg4::Host::by_name("Fafard");
const auto* lilibeth = sg4::Host::by_name("Lilibeth");
const auto* link1 = sg4::Link::by_name("1");
const auto* link2 = sg4::Link::by_name("2");
std::vector<sg4::Link*> links;
double lat = 0;
jupiter->route_to(fafard, links, &lat);
std::string path;
for (const auto* l : links)
path += std::string(path.empty() ? "" : ", ") + "link '" + l->get_name() + "'";
XBT_INFO("Path from Jupiter to Fafard: %s (latency: %fs).", path.c_str(), lat);
for (int i = 0; i < 10; i++) {
XBT_INFO("Fafard: %.0fMflops, Jupiter: %4.0fMflops, Lilibeth: %3.1fMflops, Link1: (%.2fMB/s %.0fms), Link2: "
"(%.2fMB/s %.0fms)",
fafard->get_speed() * fafard->get_available_speed() / 1000000,
jupiter->get_speed() * jupiter->get_available_speed() / 1000000,
lilibeth->get_speed() * lilibeth->get_available_speed() / 1000000, link1->get_bandwidth() / 1000,
link1->get_latency() * 1000, link2->get_bandwidth() / 1000, link2->get_latency() * 1000);
sg4::this_actor::sleep_for(1);
}
}
int main(int argc, char* argv[])
{
sg4::Engine e(&argc, argv);
xbt_assert(argc > 1, "Usage: %s platform_file\n\tExample: %s platform.xml\n", argv[0], argv[0]);
e.load_platform(argv[1]);
// Add a new host programmatically, and attach a simple speed profile to it (alternate between full and half speed
// every two seconds
e.get_netzone_root()
->add_host("Lilibeth", 25e6)
->set_speed_profile(simgrid::kernel::profile::ProfileBuilder::from_string("lilibeth_profile", R"(
0 1.0
2 0.5
)",
4))
->seal();
// Add a watcher of the changes
e.add_actor("watcher", e.host_by_name("Fafard"), watcher);
e.run();
return 0;
}
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