double min_by_sto = surf_storage_model->next_occuring_event(now);
XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f, %s min_by_sto %f",
double min_by_sto = surf_storage_model->next_occuring_event(now);
XBT_DEBUG("model %p, %s min_by_cpu %f, %s min_by_net %f, %s min_by_sto %f",