netmap overrun counters

[Luigi Rizzo]

On Thursday, April 28, 2016, bazzoola <bazzoola at gmail.com> wrote:

>
>
> On 04/28/2016 11:35 AM, Navdeep Parhar wrote:
> > On 04/28/2016 11:13, bazzoola wrote:
> >> Hi!
> >>
> >> Two questions:
> >>
> >> (1) Is there a way to know when netmap rx rings overrun? Most NIC
> >> drivers provide MPC (missed packet count) and sysctl for rx_overrun.
> >>
> >> I would like to know if my application is not reading as fast, i.e., no
> >> frames are being dropped.
> >
> > A NIC's hardware counters don't distinguish between netmap or normal
> > operation so you can monitor the existing sysctls for rx drops/overruns.
> >
> > Regards,
> > Navdeep
> >
>
> Navdeep,
>
> I am not asking about NIC's ring overrun. As you know netmap has its own
> rings. Is there a way to know if netmap's rx ring overrun?


Overruns by definition can only be counted by the NIC

Cheers
Luigi


>
> Thanks for your input.
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