simgrid::s4u::Actor::create("worker0", vm0, worker_busy_loop, "Task0", -1);
simgrid::s4u::Actor::create("worker1", vm1, worker_busy_loop, "Task1", pm0->get_speed());
simgrid::s4u::Actor::create("worker0", vm0, worker_busy_loop, "Task0", -1);
simgrid::s4u::Actor::create("worker1", vm1, worker_busy_loop, "Task1", pm0->get_speed());