[ntp:questions] Is high jitter contagious?

David Woolley david at ex.djwhome.demon.co.uk.invalid
Mon Sep 10 18:47:20 UTC 2007


In article <1189447815.398830.36040 at g4g2000hsf.googlegroups.com>,
dromedaryl at yahoo.com wrote:

> jitter the other nodes are reporting from node-1? That is, is high
> jitter contagious?

I'm not sure how jitter gets reflected into the protocol responses, but it
certainly ought to affect the time quality seen downstream.  It is a 
definite indication that the server is of low quality.

> What do you do about a system with high jitter? Is this a hardware
> problem that needs to be solved, or is there something else that can
> be done?

It's a network or OS scheduling problem, most likely a network one.  Are
you using wirless networking?  (Have you got processes at higher priorities
than ntpd?)




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