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/* Copyright (c) 2017-2025. 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 runner extends Actor {
public void run() throws SimgridException
{
var e = this.get_engine();
Host multicore_host = e.host_by_name("MyHost1");
// First test with less than, same number as, and more threads than cores
double start_time = Engine.get_clock();
this.thread_execute(multicore_host, 1e9, 2);
Engine.info("Computed 2-thread activity on a 4-core host. Took %.1f s", Engine.get_clock() - start_time);
start_time = Engine.get_clock();
this.thread_execute(multicore_host, 1e9, 4);
Engine.info("Computed 4-thread activity on a 4-core host. Took %.1f s", Engine.get_clock() - start_time);
start_time = Engine.get_clock();
this.thread_execute(multicore_host, 1e9, 6);
Engine.info("Computed 6-thread activity on a 4-core host. Took %.1f s", Engine.get_clock() - start_time);
Exec background_task = this.exec_async(2.5e9);
Engine.info("Start a 1-core background task on the 4-core host.");
start_time = Engine.get_clock();
this.thread_execute(multicore_host, 1e9, 2);
Engine.info("Computed 2-thread activity on a 4-core host. Took %.1f s", Engine.get_clock() - start_time);
start_time = Engine.get_clock();
this.thread_execute(multicore_host, 1e9, 4);
Engine.info("Computed 4-thread activity on a 4-core host. Took %.1f s", Engine.get_clock() - start_time);
background_task.await();
Engine.info("The background task has ended.");
background_task = this.exec_init(2e9).set_thread_count(4).start();
Engine.info("Start a 4-core background task on the 4-core host.");
Engine.info("Sleep for 5 seconds before starting another competing task");
this.sleep_for(5);
start_time = Engine.get_clock();
this.execute(1e9);
Engine.info("Computed 1-thread activity on a 4-core host. Took %.1f s", Engine.get_clock() - start_time);
background_task.await();
Engine.info("The background task has ended.");
}
}
public class exec_threads {
public static void main(String[] args)
{
Engine e = new Engine(args);
if (args.length == 0)
Engine.die("Usage: exec_threads <platform file>");
e.load_platform(args[0]);
e.host_by_name("MyHost1").add_actor("test", new runner());
e.run();
Engine.info("Simulation done.");
// 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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