On Tue, Aug 18, 2020 at 12:34:55PM +0000, Irene Kravets wrote:
> I'd still like to understand why I get synchronized 1PPS signals
> (with 2 usec delay) when I run both ptp4l and phc2sys, but if I only
> run ptp4l, the 1PPS signals are not synchronized?  To clarify, with
> only ptp4l running, the 1PPS signals from master and slave don't
> drift relative to each other, but the delay between the signals is
> totally random on each boot.  However, if I run ptp4l and phc2sync,
> the delay is always between 2 and 3 usec.  Any ideas on why this is
> happening?

I wouldn't expect a PPS output signal in either case.  Normally you
would have to enable the PPS output explicitly.

Probably you are using a vendor kernel with the vendor's hacks?

Or are you using an unaltered mainline Linux kernel?

Thanks,
Richard


_______________________________________________
Linuxptp-users mailing list
Linuxptp-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linuxptp-users

Reply via email to