On Mon, Jul 24, 2017 at 05:39:05PM -0700, Denny Page wrote:
> When using the PHC refclock with ptp4l, is it expected that the value of
> dpoll be approximately the same as the PTP delay request interval?
They don't have to be the same. In my experience, a PHC synchronized
over PTP to a master is more stable than the system clock, so if I'm
trying to get the best accuracy, I use a dpoll shorter than the PTP
sync interval. I'd recommend to keep dpoll + 2 <= poll, so the median
filter has at least 4 samples to work with.
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