[ntp:questions] linux kernel pps support on raspberry pi

Paul tik-tok at bodosom.net
Fri Dec 19 01:45:10 UTC 2014


On Wed, Dec 17, 2014 at 3:22 PM, folkert <folkert at vanheusden.com> wrote:
>
> - kernel   : 13.2us jitter on average
> - userspace:  9.6us jitter on average
>


I'm not seeing similar results.  Using ntpq I see a fixed .004 jitter
however I'm not sure that's the right metric.  I should think clock jitter
from loopstats would be more apropos.

I'll collect some more data.

I'm using the rpi pps kernel that's floating around with Debian 7.6. It's
driven by a "Sure" board with an MTK GPS.


More information about the questions mailing list