[Xenomai] Request for support of SIOCSHWTSTAMP

Varun Deshpande varun9485 at gmail.com
Fri Apr 1 22:09:13 CEST 2016


Hello Gilles Sir,

This plan is great ! I wish Xenomai Project a great Success !

Best Regards

Varun Deshpande
Exchange Program Student,
ESIEE Paris
+33 760 349 859

Alma Mater
Electronics & Communication Engineering,
National Institute of Technology, Bhopal (INDIA)
+91 8965 080 507

On Fri, Apr 1, 2016 at 8:50 PM, Gilles Chanteperdrix <
gilles.chanteperdrix at xenomai.org> wrote:

> On Fri, Apr 01, 2016 at 06:17:38PM +0200, Varun Deshpande wrote:
> > Hello Folks,
> >
> > As Xenomai-RTnet has combined, it is the solution for many hard realtime
> > systems but the main feature which is missing is SIOCSHWTSTAMP.
> > As i210 supports harware timestamping, it is crucial for performance
> > analysis. But it is not supported by rt_igb driver as SIOCSHWTSTAMP
> returns
> > "OPERATION NOT SUPPORTED"
> >
> > I kindly request you guys to please incorporate this feature so that user
> > can get hardware timestamp in cmsg header by enabling SIOCSHWTSTAMP
> option
> > for rt_igb driver as many of the ptp, avb programs evaluation is done by
> > hardware timestamp only.
>
> Correct me if I am wrong, but to get meaningful hardware timestamps,
> you need the machines to be synchronized with PTP, so, there is much
> more work to get this working than just implement this ioctl. I
> think we should start small, with software timestamps, as with
> Xenomai low latencies, and the fact that determinism requires to not
> fill the hardware queues, you should have some good precision already.
>
> --
>                                             Gilles.
> https://click-hack.org
>


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