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/* Copyright (c) 2007-2025. 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. */
import org.simgrid.s4u.*;
class Worker extends Actor {
public void run() throws SimgridException
{
// Define an amount of work that should take 1 second to execute.
double computation_amount = get_host().get_speed();
// Create a small DAG
// + Two parents and a child
// + First parent ends after 1 second and the Second parent after 2 seconds.
Exec first_parent = exec_init(computation_amount);
Exec second_parent = exec_init(2 * computation_amount);
Exec child = Exec.init().set_flops_amount(computation_amount);
ActivitySet pending_execs = new ActivitySet();
pending_execs.push(first_parent);
pending_execs.push(second_parent);
pending_execs.push(child);
// Name the activities (for logging purposes only)
first_parent.set_name("parent 1");
second_parent.set_name("parent 2");
child.set_name("child");
// Create the dependencies by declaring 'child' as a successor of first_parent and second_parent
first_parent.add_successor(child);
second_parent.add_successor(child);
// Start the activities.
first_parent.start();
second_parent.start();
child.start();
// wait for the completion of all activities
while (!pending_execs.empty()) {
Activity completed_one = pending_execs.await_any();
if (completed_one != null)
Engine.info("Exec '%s' is complete", completed_one.get_name());
}
}
}
public class exec_dependent {
public static void main(String[] args)
{
Engine e = new Engine(args);
e.load_platform(args[0]);
e.host_by_name("Fafard").add_actor("worker", new Worker());
Exec.on_veto_cb(new CallbackExec() {
public void run(Exec exec)
{
// First display the situation
Engine.info("Activity '%s' vetoed. Dependencies: %s; Ressources: %s", exec.get_name(),
(exec.dependencies_solved() ? "solved" : "NOT solved"),
(exec.is_assigned() ? "assigned" : "NOT assigned"));
// In this simple case, we just assign the child task to a resource when its dependencies are solved
if (exec.dependencies_solved() && !exec.is_assigned()) {
Engine.info("Activity %s's dependencies are resolved. Let's assign it to Fafard.", exec.get_name());
exec.set_host(e.host_by_name("Fafard"));
}
}
});
e.run();
Engine.info("Simulation ends.");
// The following call is useless in your code, but our continuous integration uses it to track memleaks
e.force_garbage_collection();
}
}
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