Re: [Linuxptp-devel] Optimal P, I constants

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

On Wed, May 22, 2013 at 12:51:38PM +0200, Miroslav Lichvar wrote:
> 
> It seems the cap plots are created from the RMS offsets reported by
> ptp4l, which include the jitter. Even if the reported RMS offsets
> are similar with both methods, the actual accuracy could be
> significantly better with one method. Unfortunately that information
> is hidden in the noise. To evaluate the accuracy of the clock
> controlled by the servo, more accurate measurements are needed than
> the measurements feeded to the servo. This is where simulations are
> very useful.

Right, so after seeing your simulation results, I am going to try and
validate them using an actual PPS.

BTW, do you have a test setup to measure this yourself? If so, please
do tell us what you find.

Thanks,
Richard