Re: [Linuxptp-users] Proportional Integral clock servo

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

On Wed, Jul 31, 2013 at 09:03:52AM +0800, Jason Lin wrote:
> 
> So, can we evaluate the performance of PI controller
> by calculating the averages (closer to zero) or standard deviation of
> "c->master_offset" in a period?
> 
> Does it make sense?

Yes, it does make sense to consider the apparent offset at the slaved
clock. Also you can look at the frequency adjustment (or drift).

You can increase the observation interval by using the
'summary_interval' configuration option.
 
> But, it is best to evaluate the pulse per second, if hw-supported.

Yes.

Thanks,
Richard