[time-nuts] PPS stats

[ASSI]

On Montag, 6. Juli 2020 18:04:33 CEST Keith E. Brandt, WD9GET wrote:
> Why isn't the kerninfo showing any info on the pps frequency, stability,
> and jitter?

Kernel support for PPS and for in-kernel PLL utilizing one PPS input are two 
different things, at least in the Linux kernel.  You are unlikely to have the 
in-kernel PLL support compiled in unless you are on older / exotic hardware or 
have compiled your own kernel with the requisite configuration changes.  The 
in-kernel PLL is not compatible with the tickless scheduler model that most 
modern platforms use to enable energy-efficient operation.

When you try toi switch the kernel PLL on in the NTP configuration you should 
see an error reported in the logs when ntpd starts.


Regards,
Achim.
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