1 /* Copyright (c) 2010-2023. 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 /****************************************************************************
8 * This is our solution to the fourth lab of the S4U tutorial
9 * (available online at https://simgrid.frama.io/simgrid/tuto_s4u.html)
11 * Reading this further before taking the tutorial will SPOIL YOU!!!
13 ****************************************************************************/
15 #include <simgrid/s4u.hpp>
17 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this example");
19 static void worker(std::string category)
21 const std::string mailbox_name = "worker-" + std::to_string(simgrid::s4u::this_actor::get_pid());
22 simgrid::s4u::Mailbox* mailbox = simgrid::s4u::Mailbox::by_name(mailbox_name);
24 while (true) { // Master forcefully kills the workers by the end of the simulation
25 double* msg = mailbox->get<double>();
26 double compute_cost = *msg;
29 // simgrid::s4u::this_actor::exec_init(compute_cost)->set_tracing_category(category)->wait();
31 simgrid::s4u::ExecPtr exec = simgrid::s4u::this_actor::exec_init(compute_cost);
32 exec->set_tracing_category(category);
37 static void master(std::vector<std::string> args)
39 xbt_assert(args.size() == 4, "The master function expects 3 arguments");
41 double simulation_duration = std::stod(args[1]);
42 double compute_cost = std::stod(args[2]);
43 double communication_cost = std::stod(args[3]);
45 std::vector<simgrid::s4u::ActorPtr> actors;
47 simgrid::s4u::Engine* e = simgrid::s4u::Engine::get_instance();
48 std::string my_name = "master-" + std::to_string(simgrid::s4u::this_actor::get_pid());
50 XBT_INFO("Asked to run for %.1f seconds", simulation_duration);
52 for (auto* host : e->get_all_hosts()) {
53 simgrid::s4u::ActorPtr act = simgrid::s4u::Actor::create("Worker-" + host->get_name(), host, worker, my_name);
54 actors.push_back(act);
58 while (simgrid::s4u::Engine::get_clock() < simulation_duration) { /* For each task: */
59 /* - Select a worker in a round-robin way */
60 aid_t worker_pid = actors.at(task_id % actors.size())->get_pid();
61 std::string mailbox_name = "worker-" + std::to_string(worker_pid);
62 simgrid::s4u::Mailbox* mailbox = simgrid::s4u::Mailbox::by_name(mailbox_name);
64 /* - Send the computation cost to that worker */
65 XBT_DEBUG("Sending task %d to mailbox '%s'", task_id, mailbox->get_cname());
66 mailbox->put(new double(compute_cost), communication_cost);
71 XBT_INFO("Time is up. Forcefully kill all workers.");
72 for (unsigned long i = 0; i < actors.size(); i++) {
77 int main(int argc, char* argv[])
79 simgrid::s4u::Engine e(&argc, argv);
80 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
82 /* Register the functions representing the actors */
83 e.register_function("master", &master);
85 /* Load the platform description and then deploy the application */
86 e.load_platform(argv[1]);
87 e.load_deployment(argv[2]);
89 /* Run the simulation */
92 XBT_INFO("Simulation is over");