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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. */
#include "simgrid/s4u.hpp"
XBT_LOG_NEW_DEFAULT_CATEGORY(task_dispatch, "Messages specific for this s4u example");
namespace sg4 = simgrid::s4u;
static void manager(sg4::ExecTaskPtr t)
{
auto PM0 = sg4::Engine::get_instance()->host_by_name("PM0");
auto PM1 = sg4::Engine::get_instance()->host_by_name("PM1");
XBT_INFO("Test set_flops");
t->enqueue_firings(2);
sg4::this_actor::sleep_for(50);
XBT_INFO("Set instance_0 flops to 50.");
t->set_flops(50 * PM0->get_speed());
sg4::this_actor::sleep_for(250);
t->set_flops(100 * PM0->get_speed());
XBT_INFO("Test set_parallelism degree");
t->enqueue_firings(3);
sg4::this_actor::sleep_for(50);
XBT_INFO("Set Task parallelism degree to 2.");
t->set_parallelism_degree(2);
sg4::this_actor::sleep_for(250);
t->set_parallelism_degree(1);
XBT_INFO("Test set_host dispatcher");
t->enqueue_firings(2);
sg4::this_actor::sleep_for(50);
XBT_INFO("Move dispatcher to PM1");
t->set_host(PM1, "dispatcher");
t->set_internal_bytes(1e6, "dispatcher");
sg4::this_actor::sleep_for(250);
t->set_host(PM0, "dispatcher");
XBT_INFO("Test set_host instance_0");
t->enqueue_firings(2);
sg4::this_actor::sleep_for(50);
XBT_INFO("Move instance_0 to PM1");
t->set_host(PM1, "instance_0");
t->set_flops(100 * PM1->get_speed());
t->set_internal_bytes(1e6, "instance_0");
sg4::this_actor::sleep_for(250);
t->set_host(PM0, "instance_0");
t->set_flops(100 * PM0->get_speed());
XBT_INFO("Test set_host collector");
t->enqueue_firings(2);
sg4::this_actor::sleep_for(50);
XBT_INFO("Move collector to PM1");
t->set_host(PM1, "collector");
sg4::this_actor::sleep_for(250);
t->set_host(PM0, "collector");
XBT_INFO("Test add_instances");
t->enqueue_firings(1);
sg4::this_actor::sleep_for(50);
XBT_INFO("Add 1 instance and update load balancing function");
t->add_instances(1);
t->set_load_balancing_function([]() {
static int round_robin_counter = 0;
int ret = round_robin_counter;
round_robin_counter = round_robin_counter == 1 ? 0 : round_robin_counter + 1;
return "instance_" + std::to_string(ret);
});
t->enqueue_firings(2);
sg4::this_actor::sleep_for(250);
XBT_INFO("Test remove_instances");
XBT_INFO("Remove 1 instance and update load balancing function");
t->remove_instances(1);
t->set_load_balancing_function([]() { return "instance_0"; });
t->enqueue_firings(2);
sg4::this_actor::sleep_for(300);
}
int main(int argc, char* argv[])
{
sg4::Engine e(&argc, argv);
e.load_platform(argv[1]);
auto PM0 = e.host_by_name("PM0");
auto PM1 = sg4::Engine::get_instance()->host_by_name("PM1");
auto a = sg4::ExecTask::init("A", 100 * PM0->get_speed(), PM0);
auto b = sg4::ExecTask::init("B", 50 * PM0->get_speed(), PM0);
auto c = sg4::CommTask::init("C", 1e6, PM1, PM0);
a->add_successor(b);
sg4::Task::on_completion_cb(
[](const sg4::Task* t) { XBT_INFO("Task %s finished (%d)", t->get_name().c_str(), t->get_count()); });
sg4::Task::on_start_cb([](const sg4::Task* t) { XBT_INFO("Task %s start", t->get_name().c_str()); });
PM0->add_actor("manager", manager, a);
e.run();
return 0;
}
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