1 /* Copyright (c) 2017-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 /* This example demonstrate the actor migrations.
8 * The worker actor first move by itself, and then start an execution.
9 * During that execution, the monitor migrates the worker, that wakes up on another host.
10 * The execution was of the right amount of flops to take exactly 5 seconds on the first host
11 * and 5 other seconds on the second one, so it stops after 10 seconds.
13 * Then another migration is done by the monitor while the worker is suspended.
15 * Note that worker() takes an uncommon set of parameters,
16 * and that this is perfectly accepted by create().
19 #include <simgrid/s4u.hpp>
20 namespace sg4 = simgrid::s4u;
22 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_actor_migration, "Messages specific for this s4u example");
24 static void worker(sg4::Host* first, const sg4::Host* second)
26 double flopAmount = first->get_speed() * 5 + second->get_speed() * 5;
28 XBT_INFO("Let's move to %s to execute %.2f Mflops (5sec on %s and 5sec on %s)", first->get_cname(), flopAmount / 1e6,
29 first->get_cname(), second->get_cname());
31 sg4::this_actor::set_host(first);
32 sg4::this_actor::execute(flopAmount);
34 XBT_INFO("I wake up on %s. Let's suspend a bit", sg4::this_actor::get_host()->get_cname());
36 sg4::this_actor::suspend();
38 XBT_INFO("I wake up on %s", sg4::this_actor::get_host()->get_cname());
44 sg4::Host* boivin = sg4::Host::by_name("Boivin");
45 sg4::Host* jacquelin = sg4::Host::by_name("Jacquelin");
46 sg4::Host* fafard = sg4::Host::by_name("Fafard");
48 sg4::ActorPtr actor = sg4::Actor::create("worker", fafard, worker, boivin, jacquelin);
50 sg4::this_actor::sleep_for(5);
52 XBT_INFO("After 5 seconds, move the actor to %s", jacquelin->get_cname());
53 actor->set_host(jacquelin);
55 sg4::this_actor::sleep_until(15);
56 XBT_INFO("At t=15, move the actor to %s and resume it.", fafard->get_cname());
57 actor->set_host(fafard);
61 int main(int argc, char* argv[])
63 sg4::Engine e(&argc, argv);
64 xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s ../platforms/small_platform.xml\n", argv[0], argv[0]);
65 e.load_platform(argv[1]);
67 sg4::Actor::create("monitor", e.host_by_name("Boivin"), monitor);