loopback_->set_sharing_policy(s4u::Link::SharingPolicy::FATPIPE);
loopback_->set_latency(config::get_value<double>("network/loopback-lat"));
loopback_->seal();
loopback_->set_sharing_policy(s4u::Link::SharingPolicy::FATPIPE);
loopback_->set_latency(config::get_value<double>("network/loopback-lat"));
loopback_->seal();