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SubjectRe: Timestamp counters on SMP

Is it just me or does SMP stand for "Symmetric Multi-Processing" where
the word Symmetric implies that all the processors being used are
identical? Or does this Symmetric mean something else (shared memory
model?). I find it strange that you have an SMP computer with different
CPUs and I thought this wasn't possible with Intel chipsets.

It sounds to me like this is a recipe for disaster and no wonder apps
that use time counters break :)


Nicholas Vinen

---

"... one of the main causes of the fall of the Roman Empire was that,
lacking zero, they had no way to indicate successful termination of
their C programs."
-- Robert Firth


On Tue, 28 Mar 2000, Boris Okun wrote:

> "H. Peter Anvin" wrote:
> If it works on 80386 and does not
> > > work with different TSC's, then it is broken.
> > >
> >
> > TSC's *DO* have the same rate (which varies from machine to machine,
> > but on the same machine). They are high-precision realtime clocks.
> >
> > -hpa
>
> Well, not always. I am typing this on the computer with P2/400 and
> P3/450,
> so my TSC's are different. If you search l-k you'll see that I am not
> alone.
> As I mentioned before, MPS specs actually call for the support of
> different TSC's.
>
> Boris
>
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