Re[2]: NTPsec reports excessive jitter from GPSD/KPPS SHM

[Nick Burkitt]

Hi Paul.

Thanks - care to share your favorite ntpd logging playlists and ntpviz command lines?

My first go only got me this:

root@MPM-4006:/etc/ntp.d# ntpviz

ntpviz: WARNING: liberation truetype fonts not found

ntpviz: ERROR: /var/log/ntpstats is not a directory

I'm using the "use-minimal-logging" configuration file, which contains only the line

driftfile /var/lib/ntp/ntp.drift

And /var/lib/ntp doesn't exist (now it does).

-Nick

------ Original Message ------

From: "Paul Theodoropoulos via" <address@hidden>

To: address@hidden

Sent: 3/6/2020 12:04:50 AM

Subject: Re: NTPsec reports excessive jitter from GPSD/KPPS SHM

On 3/5/2020 19:51 PM, Gary E. Miller wrote:

Here's a few minutes worth.

Which is not useful. The long time constants in ntpd take hours

to settle. And not helpful without seeing the other chimers.

 

If I may interject here - this is where ntpviz is akin to singing 'I was blind, but now I see'. For me it was revelatory, I thought my nifty Raspi Pi was kicking out some slick ntp riffs, and I was badly mistaken. Visualizing what's happening with graphs reveals so much more depth to what is going on. My timeserver(s) are  an order of magnitude "better" than what I'd initially put together several years ago.

 

Highly recommended.

 

-- Paul Theodoropoulos

http://www.anastrophe.com