Hot-plug issue with Netvsc PMD on Azure

[madhukar mythri]

Hi,

On Azure cloud, DPDK application with Netvsc PMD works well on SRIOV VF
device(Accelerated Networking enabled) VM.

However, as part of hot-plug testing, when we removed the SRIOV VF
device(by disabling the Accelerated networking option), all the traffic
works well on synthetic device(netvsc).

But, when we added back the SRIOV VF device(by enabling the Accelerated
Networking option), still the traffic flows on Synthetic device only and
not on SRIOV VF.


We could see in the DPDK logs that the SRIOV VF got added and detected well
by Netvsc PMD. But, Rx/Tx traffic does not flow on VF devices and thus
performance is low.

Currently, we need to reboot the VM to get the traffic onto the SRIOV VF
device.


Has anyone faced a similar issue?

Is this the expected behaviour or any known limitation on Netvsc PMD ?



Thanks,

Madhuker.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mails.dpdk.org/archives/users/attachments/20251126/e4b9bb2d/attachment.htm>