SimGrid  3.18
Versatile Simulation of Distributed Systems
examples/s4u/actor-migration/s4u-actor-migration.cpp
/* Copyright (c) 2017. 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_actor_migration, "Messages specific for this s4u example");
simgrid::s4u::MutexPtr checkpoint = nullptr;
simgrid::s4u::ConditionVariablePtr identification = nullptr;
static simgrid::s4u::ActorPtr controlled_process = nullptr;
/* The Emigrant process will be moved from host to host. */
static void emigrant()
{
XBT_INFO("I'll look for a new job on another machine ('Boivin') where the grass is greener.");
simgrid::s4u::Host::by_name("Boivin")); /* - First, move to another host by myself */
XBT_INFO("Yeah, found something to do");
XBT_INFO("Moving back home after work");
simgrid::s4u::this_actor::migrate(simgrid::s4u::Host::by_name("Jacquelin")); /* - Move back to original location */
simgrid::s4u::this_actor::migrate(simgrid::s4u::Host::by_name("Boivin")); /* - Go back to the other host to sleep*/
checkpoint->lock(); /* - Get controlled at checkpoint */
controlled_process = simgrid::s4u::Actor::self(); /* - and get moved back by the policeman process */
identification->notify_all();
checkpoint->unlock();
XBT_INFO("I've been moved on this new host: %s", simgrid::s4u::this_actor::getHost()->getCname());
XBT_INFO("Uh, nothing to do here. Stopping now");
}
/* The policeman check for emigrants and move them back to 'Jacquelin' */
static void policeman()
{
checkpoint->lock();
XBT_INFO("Wait at the checkpoint."); /* - block on the mutex+condition */
while (controlled_process == nullptr)
identification->wait(checkpoint);
controlled_process->migrate(simgrid::s4u::Host::by_name("Jacquelin")); /* - Move an emigrant to Jacquelin */
XBT_INFO("I moved the emigrant");
controlled_process->resume();
checkpoint->unlock();
}
int main(int argc, char* argv[])
{
simgrid::s4u::Engine e(&argc, argv);
xbt_assert(argc == 2, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
e.loadPlatform(argv[1]); /* - Load the platform description */
/* - Create and deploy the emigrant and policeman processes */
checkpoint = simgrid::s4u::Mutex::createMutex(); /* - Initiate the mutex and conditions */
e.run();
XBT_INFO("Simulation time %g", e.getClock());
return 0;
}