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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. */
/* This example tests increasing and decreasing parallelism degree of Tasks.
* First we increase and decrease parallelism degree while the Task is idle,
* then we increase and decrease parallelism degree while the Task has queued firings.
*/
#include "simgrid/s4u.hpp"
XBT_LOG_NEW_DEFAULT_CATEGORY(task_parallelism, "Messages specific for this s4u example");
namespace sg4 = simgrid::s4u;
static void manager(sg4::ExecTaskPtr t)
{
t->set_parallelism_degree(1);
t->enqueue_firings(2);
sg4::this_actor::sleep_for(300);
t->set_parallelism_degree(2);
t->enqueue_firings(4);
sg4::this_actor::sleep_for(300);
t->set_parallelism_degree(1);
t->enqueue_firings(2);
sg4::this_actor::sleep_for(300);
t->enqueue_firings(11);
t->set_parallelism_degree(2);
sg4::this_actor::sleep_for(150);
t->set_parallelism_degree(1);
sg4::this_actor::sleep_for(200);
t->set_parallelism_degree(3);
}
int main(int argc, char* argv[])
{
sg4::Engine e(&argc, argv);
e.load_platform(argv[1]);
auto pm0 = e.host_by_name("PM0");
auto t = sg4::ExecTask::init("exec_A", 100 * pm0->get_speed(), pm0);
sg4::Task::on_completion_cb(
[](const sg4::Task* task) { XBT_INFO("Task %s finished (%d)", task->get_cname(), task->get_count()); });
sg4::Task::on_start_cb([](const sg4::Task* t) { XBT_INFO("Task %s start", t->get_cname()); });
pm0->add_actor("sender", manager, t);
e.run();
return 0;
}
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