[ntp:questions] Precision changed after upgrade from ntp 4.2.4p4 to 4.2.6p2

David Taylor david-taylor at blueyonder.co.uk.invalid
Mon May 5 06:03:21 UTC 2014

On 04/05/2014 20:29, Caecilius wrote:
> After upgrading ntp from 4.2.4p4 to 4.2.6p2 as part of a Linux upgrade
> from Debian Lenny to Squueze, I've noticed that the precision variable
> has changed from -20 to -22. So it appears that my clock has now got a
> better precision. But the hardware is unchanged, and I'm running the
> same kernel.
> I thought the precision was dependent on the "granularity" of the
> system clock, which I would have expected to be independent of the ntp
> version and any other userland code.  Am I misunderstanding something
> perhaps?
> Here's the outputs of "ntpq -c rv" on both versions:

.. and what does the current development version (4.2.7p441) show?

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