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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()
{
var e = get_engine();
Host host1 = e.host_by_name("MyHost1");
Host host2 = e.host_by_name("MyHost2");
Engine.info("Energetic profile: %s", host1.get_property("wattage_per_state"));
Engine.info("Initial peak speed=%.0E flop/s; Energy dissipated =%.0E J", host1.get_speed(),
host1.get_consumed_energy());
double start = Engine.get_clock();
Engine.info("Sleep for 10 seconds");
sleep_for(10);
Engine.info("Done sleeping (duration: %.2f s). Current peak speed=%.0E; Energy dissipated=%.2f J",
Engine.get_clock() - start, host1.get_speed(), host1.get_consumed_energy());
// Execute something
start = Engine.get_clock();
double flopAmount = 100E6;
Engine.info("Run a computation of %.0E flops", flopAmount);
execute(flopAmount);
Engine.info(
"Computation done (duration: %.2f s). Current peak speed=%.0E flop/s; Current consumption: from %.0fW to %.0fW"
+ " depending on load; Energy dissipated=%.0f J",
Engine.get_clock() - start, host1.get_speed(), host1.get_wattmin_at(host1.get_pstate()),
host1.get_wattmax_at(host1.get_pstate()), host1.get_consumed_energy());
// ========= Change power peak =========
int pstate = 2;
host1.set_pstate(pstate);
Engine.info("========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s)", pstate,
host1.get_pstate_speed(pstate), host1.get_speed());
// Run another computation
start = Engine.get_clock();
Engine.info("Run a computation of %.0E flops", flopAmount);
execute(flopAmount);
Engine.info("Computation done (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
Engine.get_clock() - start, host1.get_speed(), host1.get_consumed_energy());
start = Engine.get_clock();
Engine.info("Sleep for 4 seconds");
sleep_for(4);
Engine.info("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
Engine.get_clock() - start, host1.get_speed(), host1.get_consumed_energy());
// =========== Turn the other host off ==========
Engine.info("Turning MyHost2 off, and sleeping another 10 seconds. MyHost2 dissipated %.0f J so far.",
host2.get_consumed_energy());
host2.turn_off();
start = Engine.get_clock();
sleep_for(10);
Engine.info("Done sleeping (duration: %.2f s). Current peak speed=%.0E flop/s; Energy dissipated=%.0f J",
Engine.get_clock() - start, host1.get_speed(), host1.get_consumed_energy());
}
}
public class energy_exec {
public static void main(String[] args)
{
Engine e = new Engine(args);
e.plugin_host_energy_init();
if (args.length < 1)
Engine.die("Usage: java -cp energy_exec.jar energy_exec platform_file\n\tExample: java -cp energy_exec.jar "
+ "energy_exec ../platforms/energy_platform.xml\n");
e.load_platform(args[0]);
e.host_by_name("MyHost1").add_actor("dvfs_test", new dvfs());
e.run();
Engine.info("End of simulation.");
// 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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