Re: [PATCH 0/13] Time: Generic Timeofday Subsystem (v B10)

john stultz
2005-11-14T21:38:48Z

On Mon, 2005-11-14 at 14:22 -0700, Frank Sorenson wrote:
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> john stultz wrote:
> > All,
> > I had hoped to submit this to -mm today, but since Ingo pointed
> > out an issue in the __delay code, I'm going to wait a week so the new fix
> > can be better tested.
>
> I replaced the TOD parts of the kthrt patchset with TOD B10. It seems
> there is something wrong with 'c3tsc' and 'pit', though.
>
> c3tsc appears to run fast:
> 14 Nov 12:02:13 offset: -0.00247 drift: -2502.0 ppm
> 14 Nov 12:03:14 offset: -0.145203 drift: -2342.5 ppm
> 14 Nov 12:04:14 offset: -0.329381 drift: -2700.10655738 ppm
> 14 Nov 12:05:14 offset: -0.532767 drift: -2927.46703297 ppm
> 14 Nov 12:06:15 offset: -0.638096 drift: -2626.04115226 ppm

Hmm... Not sure if this is mis-calibration or just bad-interaction w/
kthrt. Mind sending a dmesg to me?

> and 'pit' seems to produce errors (system will not switch from pit to
> another clocksource anymore):

Do the TOD patches have this issue by themselves, or is this only with
kthrt? I know I had some issues with non-continuous clocksources (pit,
jiffies) with the kthrt patch, where it wouldn't fall back to
non-high-res when the clocksource stopped supporting it.

thanks
-john