1 /* Copyright (c) 2010-2021. 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 /* ************************************************************************* */
7 /* Take this tutorial online: https://simgrid.frama.io/simgrid/tuto_s4u.html */
8 /* ************************************************************************* */
10 #include <simgrid/s4u.hpp>
12 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_app_masterworker, "Messages specific for this s4u example");
16 double compute_cost = 0;
17 long communicate_cost = 0;
18 std::vector<simgrid::s4u::Mailbox*> workers;
21 explicit Master(std::vector<std::string> args)
23 xbt_assert(args.size() > 4, "The master function expects 3 arguments plus the workers' names");
25 tasks_count = std::stol(args[1]);
26 compute_cost = std::stod(args[2]);
27 communicate_cost = std::stol(args[3]);
28 for (unsigned int i = 4; i < args.size(); i++)
29 workers.push_back(simgrid::s4u::Mailbox::by_name(args[i]));
31 XBT_INFO("Got %zu workers and %ld tasks to process", workers.size(), tasks_count);
36 for (int i = 0; i < tasks_count; i++) { /* For each task to be executed: */
37 /* - Select a worker in a round-robin way */
38 simgrid::s4u::Mailbox* mailbox = workers[i % workers.size()];
40 /* - Send the computation amount to the worker */
41 if (tasks_count < 10000 || (tasks_count < 100000 && i % 10000 == 0) || i % 100000 == 0)
42 XBT_INFO("Sending task %d of %ld to mailbox '%s'", i, tasks_count, mailbox->get_cname());
43 mailbox->put(new double(compute_cost), communicate_cost);
46 XBT_INFO("All tasks have been dispatched. Request all workers to stop.");
47 for (unsigned int i = 0; i < workers.size(); i++) {
48 /* The workers stop when receiving a negative compute_cost */
49 simgrid::s4u::Mailbox* mailbox = workers[i % workers.size()];
50 mailbox->put(new double(-1.0), 0);
56 simgrid::s4u::Mailbox* mailbox = nullptr;
59 explicit Worker(std::vector<std::string> args)
61 xbt_assert(args.size() == 1, "The worker expects to not get any argument");
63 mailbox = simgrid::s4u::Mailbox::by_name(simgrid::s4u::this_actor::get_host()->get_name());
70 auto msg = mailbox->get_unique<double>();
73 if (compute_cost > 0) /* If compute_cost is valid, execute a computation of that cost */
74 simgrid::s4u::this_actor::execute(compute_cost);
75 } while (compute_cost > 0); /* Stop when receiving an invalid compute_cost */
77 XBT_INFO("Exiting now.");
81 int main(int argc, char* argv[])
83 simgrid::s4u::Engine e(&argc, argv);
84 xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
86 /* Register the classes representing the actors */
87 e.register_actor<Master>("master");
88 e.register_actor<Worker>("worker");
90 /* Load the platform description and then deploy the application */
91 e.load_platform(argv[1]);
92 e.load_deployment(argv[2]);
94 /* Run the simulation */
97 XBT_INFO("Simulation is over");