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 #include <simgrid/s4u.hpp>
8 XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_exec_thread, "Messages specific for this s4u example");
10 namespace sg4 = simgrid::s4u;
14 const auto* e = sg4::Engine::get_instance();
15 sg4::Host* multicore_host = e->host_by_name("MyHost1");
16 // First test with less than, same number as, and more threads than cores
17 double start_time = sg4::Engine::get_clock();
18 sg4::this_actor::thread_execute(multicore_host, 1e9, 2);
19 XBT_INFO("Computed 2-thread activity on a 4-core host. Took %g s", e->get_clock() - start_time);
21 start_time = sg4::Engine::get_clock();
22 sg4::this_actor::thread_execute(multicore_host, 1e9, 4);
23 XBT_INFO("Computed 4-thread activity on a 4-core host. Took %g s", e->get_clock() - start_time);
25 start_time = sg4::Engine::get_clock();
26 sg4::this_actor::thread_execute(multicore_host, 1e9, 6);
27 XBT_INFO("Computed 6-thread activity on a 4-core host. Took %g s", e->get_clock() - start_time);
29 simgrid::s4u::ExecPtr background_task = sg4::this_actor::exec_async(2.5e9);
30 XBT_INFO("Start a 1-core background task on the 4-core host.");
32 start_time = sg4::Engine::get_clock();
33 sg4::this_actor::thread_execute(multicore_host, 1e9, 2);
34 XBT_INFO("Computed 2-thread activity on a 4-core host. Took %g s", e->get_clock() - start_time);
36 start_time = sg4::Engine::get_clock();
37 sg4::this_actor::thread_execute(multicore_host, 1e9, 4);
38 XBT_INFO("Computed 4-thread activity on a 4-core host. Took %g s", e->get_clock() - start_time);
40 background_task->wait();
41 XBT_INFO("The background task has ended.");
43 background_task = sg4::this_actor::exec_init(2e9)->set_thread_count(4)->start();
44 XBT_INFO("Start a 4-core background task on the 4-core host.");
46 XBT_INFO("Sleep for 5 seconds before starting another competing task");
47 sg4::this_actor::sleep_for(5);
49 start_time = sg4::Engine::get_clock();
50 sg4::this_actor::execute(1e9);
51 XBT_INFO("Computed 1-thread activity on a 4-core host. Took %g s", e->get_clock() - start_time);
53 background_task->wait();
54 XBT_INFO("The background task has ended.");
57 int main(int argc, char* argv[])
59 sg4::Engine e(&argc, argv);
61 xbt_assert(argc == 2, "Usage: %s <platform file>", argv[0]);
63 e.load_platform(argv[1]);
64 sg4::Actor::create("test", e.host_by_name("MyHost1"), runner);
67 XBT_INFO("Simulation done.");