Re: AMD X2 unsynced TSC fix?

Andrew Morton
2006-10-28T06:47:46Z

On Fri, 27 Oct 2006 23:35:24 -0700
thockin@hockin.org wrote:

> On Fri, Oct 27, 2006 at 09:06:12PM -0700, Andi Kleen wrote:
> >
> > > So far, has I can understand. Seems to me that my computer which have a
> > > Pentium D (Dual Core) on VIA chipset, also have unsynchronized TSC and
> > > with the patch of hrtimers on
> >
> > Intel systems (except for some large highend systems) have synchronized TSCs.
>
> Does Intel guarantee that, or is that just what we happen to see, so far.

Matthias has a Xeon machine on which the TSCs are unsynced, and which are
unsyncable - write_tsc() just doesn't do anything. See thread at