Re: [Linuxptp-users] Get TAI time in PTP Hardware TimeStamping

[Dolly G. <dol...@gm...>]

Thanks, Miroslav. We are reading the TAI time by *clock_gettime* using
CLOCK_TAI.

Though we see the UTC offset in PMC as set by the master, the
*clock_gettime* does not reflect it. *clock_gettime* with CLOCK_TAI shows
the same time as the CLOCK_REALTIME.

Does PTP not override the kernel parameter tai_offset?

On Wed, Oct 31, 2018 at 3:14 PM Miroslav Lichvar <mli...@re...>
wrote:

> On Wed, Oct 31, 2018 at 02:55:13PM +0530, Dolly Gyanchandani wrote:
> > Hello all,
> >
> > We are using PTP Hardware TimeStamping (setup on CentOS7 machines). We
> want
> > to get TAI time.
> >
> > Through ptp4l and phc2sys, the system UTC clock gets updated by the PTP
> > master clock. But is there a way to get TAI time?
>
> The kernel provides the CLOCK_TAI clock for applications. It can be
> read with the clock_gettime() function.
>
> If you just need the UTC-TAI offset, there is the ntp_gettime()
> function.
>
> --
> Miroslav Lichvar
>