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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 dvfs extends Actor {
public void run()
{
double workload = 100E6;
Host host = this.get_host();
int nb = host.get_pstate_count();
Engine.info("Count of Processor states=%d", nb);
Engine.info("Current power peak=%f", host.get_speed());
// Run a Computation
this.execute(workload);
double exec_time = Engine.get_clock();
Engine.info("Computation1 duration: %.2f", exec_time);
// Change power peak
int new_pstate = 2;
Engine.info("Changing power peak value to %f (at index %d)", host.get_pstate_speed(new_pstate), new_pstate);
host.set_pstate(new_pstate);
Engine.info("Current power peak=%f", host.get_speed());
// Run a second Computation
this.execute(workload);
exec_time = Engine.get_clock() - exec_time;
Engine.info("Computation2 duration: %.2f", exec_time);
// Verify that the default pstate is set to 0
host = get_engine().host_by_name("MyHost2");
Engine.info("Count of Processor states=%d", host.get_pstate_count());
Engine.info("Current power peak=%f", host.get_speed());
}
}
public class exec_dvfs {
public static void main(String[] args)
{
Engine e = new Engine(args);
if (args.length == 1)
Engine.die("Usage: %s platform_file\n\tExample: exec_dvfs ../platforms/energy_platform.xml\n");
e.load_platform(args[0]);
e.host_by_name("MyHost1").add_actor("dvfs_test", new dvfs());
e.host_by_name("MyHost2").add_actor("dvfs_test", new dvfs());
e.run();
Engine.info("Total simulation time: %e", Engine.get_clock());
// 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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