netmap / LINUX realtime / ixgbevf: huge RX latencies

[Vincenzo Maffione]

HEAD/11 is the FreeBSD version.
Your question is about netmap on Linux, so this is the wrong mailing list.
You should open an issue on the official netmap
https://github.com/luigirizzo/netmap/issues

Cheers
  Vincenzo

2017-12-02 13:20 GMT+01:00 Joe Buehler <aspam at cox.net>:

> K. Macy wrote:
>
> > HEAD or 11?
>
> I'm not quite sure what the question means but there is this in the
> netmap code:
>
> ./net/netmap.h:42:#define       NETMAP_API      11              /* current
> API version */
>
> LINUX kernels nowadays can timestamp frames when they arrive from the
> NIC.  I made a trivial patch to the netmap driver to turn this on and
> also pass the timestamp to user space, and will pass on the changes.  I
> am doing frame latency measurements and this simple change eliminated a
> *whole* lot of noise in the measurements.
>
> Joe Buehler
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-- 
Vincenzo Maffione