[time-nuts] Linux time servers

bg at lysator.liu.se bg at lysator.liu.se
Fri May 15 21:54:45 UTC 2009


>
>> 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.

Thanks! That might be good news after a looong dark night.

--

   Björn




More information about the time-nuts mailing list