Hi Jasvinder,

26/05/2017 20:11, Jasvinder Singh:

The SoftNIC PMD provides SW fall-back option for the NICs not supporting
the Traffic Management (TM) features. 

Do you mean that you want to stack PMDs in order to offer some fallbacks?
It means the user needs to instantiate this PMD for each HW which does
not support traffic management, instead of normal hardware probing?

SoftNIC PMD overview:
- The SW fall-back is based on the existing librte_sched DPDK library.
- The TM-agnostic port (the underlay device) is wrapped into a TM-aware
  softnic port (the overlay device).
- Once the overlay device (virtual device) is created, the configuration of
  the underlay device is taking place through the overlay device.
- The SoftNIC PMD is generic, i.e. it works for any underlay device PMD that
  implements the ethdev API.

Why not calling librte_sched directly in ethdev for PMDs which do not
implement hardware offload?
Am I missing something obvious?