Hi Rakesh, Thanks for sharing this — the queue-level PFC framework looks like a useful addition. One question on the design: pfc_system_t exposes pfc_get_capabilities but no equivalent for reading back the active configuration. Without it, there is no way to verify what is currently configured on a given interface. Would you consider adding it ? Jerome De : [email protected] <[email protected]> de la part de rkudurumalla via lists.fd.io <[email protected]> Date : vendredi, 22 mai 2026 à 08:17 À : [email protected] <[email protected]> Objet : [vpp-dev] Add Priority Flow Control (PFC) offload framework to VPP
Hi Team, We have been working on adding a Priority Flow Control (PFC) offload framework in VPP to enable hardware-assisted handling of PFC on supported devices. The initial version of the patch is available here: Framework spec https://gerrit.fd.io/r/c/vpp/+/45796<https://gerrit.fd.io/r/c/vpp/+/45796/2> Driver Support https://gerrit.fd.io/r/c/vpp/+/45797 This introduces a framework where device plugins can register PFC capabilities and offload priority-based pause/resume handling to hardware. Along with the framework, we have also included an initial reference implementation to demonstrate integration with a HW backend. The goal is to provide a common interface in VPP while leveraging NIC/ASIC support for low-latency congestion control, especially for loss-sensitive traffic classes. We can also go through a quick overview or discuss the design in the next VPP community meeting. We would appreciate comments on the overall design and integration approach. Regards, Rakesh
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