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/* Copyright (c) 2006-2025. 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.*;
public class dag_failure {
public static void main(String[] args)
{
Engine e = new Engine(args);
Engine.set_config("host/model:ptask_L07");
e.load_platform(args[0]);
var faulty = e.host_by_name("Faulty Host");
var safe = e.host_by_name("Safe Host");
Exec.on_completion_cb(new CallbackExec() {
public void run(Exec exec)
{
if (exec.get_state() == Activity.State.FINISHED)
Engine.info("Activity '%s' is complete (start time: %f, finish time: %f)", exec.get_name(),
exec.get_start_time(), exec.get_finish_time());
if (exec.get_state() == Activity.State.FAILED) {
if (exec.is_parallel())
Engine.info("Activity '%s' has failed. %.0f %% remain to be done", exec.get_name(),
100 * exec.get_remaining_ratio());
else
Engine.info("Activity '%s' has failed. %.0f flops remain to be done", exec.get_name(),
exec.get_remaining());
}
}
});
/* creation of a single Exec that will poorly fail when the workstation will stop */
Engine.info("First test: sequential Exec activity");
Exec exec = Exec.init().set_name("Poor task").set_flops_amount(2e10).start();
Engine.info("Schedule Activity '%s' on 'Faulty Host'", exec.get_name());
exec.set_host(faulty);
/* Add a child Exec that depends on the Poor task' */
Exec child = Exec.init().set_name("Child").set_flops_amount(2e10).set_host(safe);
exec.add_successor(child);
child.start();
Engine.info("Run the simulation");
e.run();
Engine.info("let's unschedule Activity '%s' and reschedule it on the 'Safe Host'", exec.get_name());
exec.unset_host();
exec.set_host(safe);
Engine.info("Run the simulation again");
e.run();
Engine.info("Second test: parallel Exec activity");
exec = Exec.init().set_name("Poor parallel task").set_flops_amounts(new double[] {2e10, 2e10}).start();
Engine.info("Schedule Activity '%s' on 'Safe Host' and 'Faulty Host'", exec.get_name());
exec.set_hosts(new Host[] {safe, faulty});
/* Add a child Exec that depends on the Poor parallel task' */
child = Exec.init().set_name("Child").set_flops_amount(2e10).set_host(safe);
exec.add_successor(child);
child.start();
Engine.info("Run the simulation");
e.run();
Engine.info("let's unschedule Activity '%s' and reschedule it only on the 'Safe Host'", exec.get_name());
exec.unset_hosts();
exec.set_flops_amount(4e10).set_host(safe);
Engine.info("Run the simulation again");
e.run();
// 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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