s4u::Host* sender = src_actor_->get_host();
s4u::Host* receiver = dst_actor_->get_host();
surf_action_ = surf_network_model->communicate(sender, receiver, size_, rate_);
surf_action_->set_activity(this);
surf_action_->set_category(get_tracing_category());
s4u::Host* sender = src_actor_->get_host();
s4u::Host* receiver = dst_actor_->get_host();
surf_action_ = surf_network_model->communicate(sender, receiver, size_, rate_);
surf_action_->set_activity(this);
surf_action_->set_category(get_tracing_category());