[time-nuts] Linux time servers

[Hal Murray]

> The _sore_ thing is that with 2.4.x-nano kernels offsets/jitter got
> that good within minutes. Now many years later it takes days... :-( 

I think that's a bug introduced by the tickless scheduler  work.


> For my daytime use of ntp, convergence in less than 5 minutes is
> essential. Due to some unusual peripherials, that often have drivers
> dictating a certain kernel version its is often impossible to find a
> linux kernel version that support both the proprietary drivers and
> decent ntp-server performance. 

Do you build your own kernels?

It looks like there is a simple change that fixes the convergence.
  http://lkml.org/lkml/2009/5/4/373

There is also the TSC calibration mess.  If you are only running on one 
machine, or one type of system, you can patch the kernel to use a hard-coded 
answer.

Or you can try one of the non-TSC clock sources.





-- 
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