On Thu, May 17, 2018 at 01:42:04PM +0000, Matt Middendorf wrote:
>  The proportional term of the PI servo lets the jitter pass right through. I 
> did try the SW values for the servo constants. But that caused other problems 
> such as sluggish response and drift. The change I made works really well, 
> however it does require he step_threshold to be set to an appropriate value.

How did you measure the error of the clock? What PI values have you
tried beside the defaults corresponding to HW/SW timestamping?

Miroslav Lichvar

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