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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 execute_load_test extends Actor {
public void run()
{
Engine e = this.get_engine();
Host host = e.host_by_name("MyHost1");
Engine.info(
"Initial peak speed: %.0E flop/s; number of flops computed so far: %.0E (should be 0) and current average "
+ "load: %.5f (should be 0)",
host.get_speed(), host.load.get_computed_flops(), host.load.get_average());
double start = Engine.get_clock();
Engine.info("Sleep for 10 seconds");
sleep_for(10);
double speed = host.get_speed();
Engine.info(
"Done sleeping %.2fs; peak speed: %.0E flop/s; number of flops computed so far: %.0E (nothing should have "
+ "changed)",
Engine.get_clock() - start, host.get_speed(), host.load.get_computed_flops());
// Run an activity
start = Engine.get_clock();
Engine.info("Run an activity of %.0E flops at current speed of %.0E flop/s", 200E6, host.get_speed());
execute(200E6);
Engine.info("Done working on my activity; this took %.2fs; current peak speed: %.0E flop/s (when I started the "
+ "computation, the speed was set to %.0E flop/s); number of flops computed so "
+ "far: %.2E, average load as reported by the HostLoad plugin: %.5f (should be %.5f)",
Engine.get_clock() - start, host.get_speed(), speed, host.load.get_computed_flops(),
host.load.get_average(),
200E6 / (10.5 * speed * host.get_core_count() +
(Engine.get_clock() - start - 0.5) * host.get_speed() * host.get_core_count()));
// ========= Change power peak =========
int pstate = 1;
host.set_pstate(pstate);
Engine.info(
"========= Requesting pstate %d (speed should be of %.0E flop/s and is of %.0E flop/s, average load is %.5f)",
pstate, host.get_pstate_speed(pstate), host.get_speed(), host.load.get_average());
// Run a second activity
start = Engine.get_clock();
Engine.info("Run an activity of %.0E flops", 100E6);
execute(100E6);
Engine.info(
"Done working on my activity; this took %.2fs; current peak speed: %.0E flop/s; number of flops computed so "
+ "far: %.2E",
Engine.get_clock() - start, host.get_speed(), host.load.get_computed_flops());
start = Engine.get_clock();
Engine.info("========= Requesting a reset of the computation and load counters");
host.load.reset();
Engine.info("After reset: %.0E flops computed; load is %.5f", host.load.get_computed_flops(),
host.load.get_average());
Engine.info("Sleep for 4 seconds");
sleep_for(4);
Engine.info("Done sleeping %.2f s; peak speed: %.0E flop/s; number of flops computed so far: %.0E",
Engine.get_clock() - start, host.get_speed(), host.load.get_computed_flops());
// =========== Turn the other host off ==========
Host host2 = e.host_by_name("MyHost2");
Engine.info("Turning MyHost2 off, and sleeping another 10 seconds. MyHost2 computed %.0f flops so far and has an "
+ "average load of %.5f.",
host2.load.get_computed_flops(), host2.load.get_average());
host2.turn_off();
start = Engine.get_clock();
sleep_for(10);
Engine.info("Done sleeping %.2f s; peak speed: %.0E flop/s; number of flops computed so far: %.0E",
Engine.get_clock() - start, host.get_speed(), host.load.get_computed_flops());
}
}
class change_speed extends Actor {
public void run()
{
Host host = this.get_engine().host_by_name("MyHost1");
sleep_for(10.5);
Engine.info("I slept until now, but now I'll change the speed of this host "
+ "while the other actor is still computing! This should slow the computation down.");
host.set_pstate(2);
}
}
public class plugin_host_load {
public static void main(String[] args)
{
Engine e = new Engine(args);
if (args.length == 1)
Engine.die("Usage: %s platform_file\n\tExample: plugin_host_load ../platforms/energy_platform.xml\n");
e.plugin_host_load_init();
e.load_platform(args[0]);
e.host_by_name("MyHost1").add_actor("load_test", new execute_load_test());
e.host_by_name("MyHost2").add_actor("change_speed", new change_speed());
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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