Re: [Linuxptp-users] Interesting (very wrong) PTP output

[Richard C. <ric...@gm...>]

On Tue, Jun 05, 2012 at 11:31:24PM +0000, Keller, Jacob E wrote:

> It seems like somehow the p/i servo code is incorrect because once
> we hit max adjust it never seems to move away from it.

The servo clamps the adjustment to the maximum. It looks like it the
servo output is always outside of the limit. You can inspect s->drift
to get a better idea what is going on.

> However that
> isn't the case when I run ptp4l without that script. I am still
> trying to determine what the script is doing to the ptp registers on
> the device (if anything)

Futzing with the clock or the device registers behind the program's
back could well cause unexpected results.

HTH,
Richard