[ntp:questions] Seeing large jitter and delay in recent ntpd and recent Solaris

Chris Albertson albertson.chris at gmail.com
Wed Nov 9 22:47:54 UTC 2011

On Wed, Nov 9, 2011 at 1:28 PM, Fran <fran.horan at jhuapl.edu> wrote:
> Thanks Chuck,
> We have other real time processing occuring on the system and are sensitive to offset errors, so we want ntpd to run at the highest real time priority.

That will do little good and maybe some harm.  ntpd reads time stamped
input.  Even if this sits in a buffer unprocessed it's OK because the
critical work, the stamping is done inside an interrupt handler.

Running a process at RT priority when it does not need to can take
away CPU time from other processes and harm overall system

If you are concerned about offset the solution is to use a good local
reference clock

Chris Albertson
Redondo Beach, California

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