1 /* Copyright (c) 2007-2021. 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 #include "simgrid/s4u.hpp"
9 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_test, "Messages specific for this s4u example");
11 int main(int argc, char* argv[])
13 simgrid::s4u::Engine e(&argc, argv);
14 e.load_platform(argv[1]);
15 std::set<simgrid::s4u::Activity*> vetoed;
16 e.track_vetoed_activities(&vetoed);
18 auto fafard = e.host_by_name("Fafard");
20 // Display the details on vetoed activities
21 simgrid::s4u::Activity::on_veto.connect([](simgrid::s4u::Activity& a) {
22 auto& exec = static_cast<simgrid::s4u::Exec&>(a); // all activities are execs in this example
24 XBT_INFO("Activity '%s' vetoed. Dependencies: %s; Ressources: %s", exec.get_cname(),
25 (exec.dependencies_solved() ? "solved" : "NOT solved"),
26 (exec.is_assigned() ? "assigned" : "NOT assigned"));
29 simgrid::s4u::Exec::on_completion.connect([](simgrid::s4u::Exec const& exec) {
30 XBT_INFO("Activity '%s' is complete (start time: %f, finish time: %f)", exec.get_cname(), exec.get_start_time(),
31 exec.get_finish_time());
34 // Define an amount of work that should take 1 second to execute.
35 double computation_amount = fafard->get_speed();
37 // Create a small DAG: Two parents and a child
38 simgrid::s4u::ExecPtr first_parent = simgrid::s4u::Exec::init();
39 simgrid::s4u::ExecPtr second_parent = simgrid::s4u::Exec::init();
40 simgrid::s4u::ExecPtr child = simgrid::s4u::Exec::init();
41 first_parent->add_successor(child);
42 second_parent->add_successor(child);
44 // Set the parameters (the name is for logging purposes only)
45 // + First parent ends after 1 second and the Second parent after 2 seconds.
46 first_parent->set_name("parent 1")->set_flops_amount(computation_amount);
47 second_parent->set_name("parent 2")->set_flops_amount(2 * computation_amount);
48 child->set_name("child")->set_flops_amount(computation_amount);
50 // Only the parents are scheduled so far
51 first_parent->set_host(fafard);
52 second_parent->set_host(fafard);
54 // Start all activities that can actually start.
55 first_parent->vetoable_start();
56 second_parent->vetoable_start();
57 child->vetoable_start();
59 while (child->get_state() != simgrid::s4u::Activity::State::FINISHED) {
61 for (auto* a : vetoed) {
62 auto* exec = static_cast<simgrid::s4u::Exec*>(a);
64 // In this simple case, we just assign the child task to a resource when its dependencies are solved
65 if (exec->dependencies_solved() && not exec->is_assigned()) {
66 XBT_INFO("Activity %s's dependencies are resolved. Let's assign it to Fafard.", exec->get_cname());
67 exec->set_host(fafard);
69 XBT_INFO("Activity %s not ready.", exec->get_cname());
72 vetoed.clear(); // DON'T FORGET TO CLEAR this set between two calls to run
75 XBT_INFO("Simulation time %g", simgrid::s4u::Engine::get_clock());