I asked this on an NTP list, got some guesses, but no knowledgeable responses.
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So, running a process(es) which keep the CPU completely busy reduces the jitter. The busier, the better. Why? I'm guessing it has something to do with interrupt latency, but why does a busy CPU make it more consistent - I'd expect the opposite? The difference is very obvious.

Is there something else I can do to keep the jitter low?

Mike, have you tried FreeBSD instead?  Does it show the same problems?

Cheers,
David
--
SatSignal software - quality software written to your requirements
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