[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [Xen-ia64-devel] RE: Xen-ia64-devel Digest, Vol 11, Issue 22
On Fri, 2006-02-10 at 11:56 -0800, Magenheimer, Dan (HP Labs Fort
> > What if you are running on h/w where ITC cannot be synchronized
> > because different cpus are driven from different clock sources?
> > See IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT.
> > Solution d) might be to tell the guest that itc isn't syncronized
> > (even on systems where it could be).
> Cool. I wasn't aware of this feature. What are the
> ramifications to an SMP OS (or in this case SMP guest)
> if itc isn't synchronized? (I see the comment in time.c,
> just not sure I fully understand the user-visible impact.)
Another time source is required for the time interpolator in that
case. This is often an HPET or platform specific time source.
Alex Williamson HP Linux & Open Source Lab
Xen-ia64-devel mailing list