Yes, we are using vdev_netvsc. Native netvsc PMD we are observing issues in
enabling multiple queues.
Though we have 6 DPDK cores, unable to configure more than 4 queues.

On Mon, Jun 26, 2023 at 12:18 AM Stephen Hemminger <
stephen@networkplumber.org> wrote:

> On Thu, 22 Jun 2023 22:06:10 +0530
> Nageswara Rao <nagpen75@gmail.com> wrote:
>
> > Hi All,
> >
> > We are observing the following issue with DPDK22.11. We didn’t find any
> > upstream patches for this issue on the DPDK github. Is there any known
> > issue, please let us know.
> >
> >
> >
> > *Issue:*
> >
> > On Azure platform, we are unable to configure more than 4 queues. When we
> > try to configure more than 4 queues its failing with “EAL: Cannot send
> more
> > than 8 FDs” error.
> >
> > Here I am pasting the working and failing testpmd logs.
> >
> > Please note that this issue is not observed in DPDK 21.11.
> >
>
> You should be using the native netvsc PMD, not the
> vdev_netvsc,failsafe,tap kludge.
>
> I don't work on Azure any more but I suspect the issue is that the default
> in the kernel for TAP is for the number of queues == number of cores.
>
> You aren't going to see any real benefit from having more queues than
> the number of DPDK cores.
>
>