[LinuxPPS] More Results. (plots)

[Udo van den Heuvel]

clemens at dwf.com wrote:
>> Could you please make graphs available online?
>>
> Here are two representative plots, they are compressed Postscript.

Thanks!

> Im told that there is a well known bug in the calibration of the TSC timer
> in recent versions of Linux, and this is probably the reason for this glitch.

Doesn't your board have HPET?
Try to find out and enable in the kernel. Maybe you have to do
hpet=force on the kernel line in grub.

> I have seen the frequency offset in /etc/ntp/ntp.drift change after each reboot
> and this didnt happen in the past.

See http://pindarots.xs4all.nl/mrtg/ntppll.html
Over here it changes every time.