Re: [ck] [PATCH] dynamic-tick patch modified for SMP

Srivatsa Vaddagiri
2005-08-15T16:25:48Z

On Sun, Aug 14, 2005 at 12:15:38AM -0400, Kyle Moffett wrote:
> It may be a good idea to rebase this patch off the new generic time-
> keeping
> subsystem that John Stultz is working on.

I _am_ using the new subsystem interface (->mark_offset) to catch up with lost
ticks. Only I don't think it is that good at catching up the lost ticks if we
skip ticks for few seconds in a stretch. For ex: I am observing drift (time
slows down) when skipping ticks for upto 5 seconds on a 699MHz P3 SMP hardware.
Both TSC and ACPI pm timer give this drift. I am investigating this and will
post an update as soon as I get more information.

--

Thanks and Regards,
Srivatsa Vaddagiri,
Linux Technology Center,
IBM Software Labs,
Bangalore, INDIA - 560017