Through reading this patchset, it seems the semantics of 'job' for UEC is about
how to identify a PDC(Packet Delivery Context) instance, which is specified by
src fep_address/pdc_id and dst fep_address/pdc_id as there seems to be more
than one PDC instance between two nodes, so the 'job' is really about
grouping processes from the same 'job' to use the same PDC instance and
preventing processes from different 'job' from using the same PDC instance?

UEC targets HPC and AI workloads, so the concept of a job in this discussion represents a parallel application.  I.e. a group of processes across multiple nodes communicating.

- Sean