-/* Copyright (c) 2017-2021. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2017-2023. 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. */
#include <simgrid/s4u.hpp>
XBT_LOG_NEW_DEFAULT_CATEGORY(s4u_ptask_multicore, "Messages specific for this s4u example");
-
namespace sg4 = simgrid::s4u;
static void runner()
{
- auto e = sg4::Engine::get_instance();
+ auto* e = sg4::Engine::get_instance();
std::vector<double> comp(2, 1e9);
std::vector<double> comm(4, 0.0);
// Different hosts.
std::vector<sg4::Host*> hosts_diff = {e->host_by_name("MyHost2"), e->host_by_name("MyHost3")};
- double start_time = e->get_clock();
+ double start_time = sg4::Engine::get_clock();
sg4::this_actor::parallel_execute(hosts_diff, comp, comm);
XBT_INFO("Computed 2-core activity on two different hosts. Took %g s", e->get_clock() - start_time);
// Same host, monocore.
std::vector<sg4::Host*> monocore_hosts = {e->host_by_name("MyHost2"), e->host_by_name("MyHost2")};
- start_time = e->get_clock();
+ start_time = sg4::Engine::get_clock();
sg4::this_actor::parallel_execute(monocore_hosts, comp, comm);
- XBT_INFO("Computed 2-core activity one 1-core host. Took %g s", e->get_clock() - start_time);
+ XBT_INFO("Computed 2-core activity a 1-core host. Took %g s", e->get_clock() - start_time);
// Same host, multicore.
std::vector<sg4::Host*> multicore_host = {e->host_by_name("MyHost1"), e->host_by_name("MyHost1")};
- start_time = e->get_clock();
+ start_time = sg4::Engine::get_clock();
sg4::this_actor::parallel_execute(multicore_host, comp, comm);
- XBT_INFO("Computed 2-core activity on one 2-core host. Took %g s", e->get_clock() - start_time);
+ XBT_INFO("Computed 2-core activity on a 4-core host. Took %g s", e->get_clock() - start_time);
// Same host, using too many cores
std::vector<double> comp6(6, 1e9);
std::vector<double> comm6(36, 0.0);
std::vector<sg4::Host*> multicore_overload(6, e->host_by_name("MyHost1"));
- start_time = e->get_clock();
+ start_time = sg4::Engine::get_clock();
sg4::this_actor::parallel_execute(multicore_overload, comp6, comm6);
- XBT_INFO("Computed 6-core activity of a 4-core host. Took %g s", e->get_clock() - start_time);
+ XBT_INFO("Computed 6-core activity on a 4-core host. Took %g s", e->get_clock() - start_time);
+
+ // Same host, adding some communication
+ std::vector<double> comm2 = {0, 1E7, 1E7, 0};
+ start_time = sg4::Engine::get_clock();
+ sg4::this_actor::parallel_execute(multicore_host, comp, comm2);
+ XBT_INFO("Computed 2-core activity on a 4-core host with some communication. Took %g s", e->get_clock() - start_time);
+
+ // See if the multicore execution continues to work after changing pstate
+ XBT_INFO("Switching machine multicore to pstate 1.");
+ e->host_by_name("MyHost1")->set_pstate(1);
+ XBT_INFO("Switching back to pstate 0.");
+ e->host_by_name("MyHost1")->set_pstate(0);
+
+ start_time = sg4::Engine::get_clock();
+ sg4::this_actor::parallel_execute(multicore_host, comp, comm);
+ XBT_INFO("Computed 2-core activity on a 4-core host. Took %g s", e->get_clock() - start_time);
+
+ start_time = sg4::Engine::get_clock();
+ sg4::this_actor::parallel_execute(hosts_diff, comp, comm);
+ XBT_INFO("Computed 2-core activity on two different hosts. Took %g s", e->get_clock() - start_time);
+
+ // Add a background task and change ptask on the fly
+ auto* MyHost1 = e->host_by_name("MyHost1");
+ sg4::ExecPtr background_task = MyHost1->exec_async(5e9);
+ XBT_INFO("Start a 1-core background task on the 4-core host.");
+
+ start_time = sg4::Engine::get_clock();
+ sg4::this_actor::parallel_execute(multicore_host, comp, comm);
+ XBT_INFO("Computed 2-core activity on the 4-core host. Took %g s", e->get_clock() - start_time);
+ XBT_INFO("Remaining amount of work for the background task: %.0f%%",
+ 100 * background_task->get_remaining_ratio());
+
+ XBT_INFO("Switching to pstate 1 while background task is still running.");
+ MyHost1->set_pstate(1);
+ start_time = sg4::Engine::get_clock();
+ sg4::this_actor::parallel_execute(multicore_host, comp, comm);
+ XBT_INFO("Computed again the same 2-core activity on it. Took %g s", e->get_clock() - start_time);
+
+ background_task->wait();
+ XBT_INFO("The background task has ended.");
}
int main(int argc, char* argv[])
xbt_assert(argc == 2, "Usage: %s <platform file>", argv[0]);
e.load_platform(argv[1]);
- sg4::Actor::create("test", sg4::Host::by_name("MyHost1"), runner);
+ sg4::Actor::create("test", e.host_by_name("MyHost1"), runner);
e.run();
XBT_INFO("Simulation done.");
