[ntp:questions] Sudden drop in frequency after software update

Rob van der Putten rob at sput.nl
Mon Jan 19 15:41:45 UTC 2009


Hi there


Adam Myrow wrote:

> It would be interesting to know what kernel version those who are having
> trouble with unstable drift in Linux are using.  I am using kernel
> 2.6.27.7,

2.6.26

> and it is very stable, varying no more than 5 PPM, even across
> reboots.  It should be noted that I rebuilt my kernel with the timer
> frequency set to 100HZ,

It's 250. Timekeeping is not a primary concern on this box.

> and made sure that dynamic ticks was disabled.
> This seems to produce the lowest drift values.

I can't find that option.

>  In an older 2.6 kernel,
> I noticed the drift rate jumping all over the place as described.
> However, it appears that this may have finally been fixed.

It's pretty stable except for this perticular reboot on this perticular box.


Regards,
Rob




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