On Tue, Nov 29, 2005 at 11:43:47PM +0100, Andi Kleen wrote:
> > Well, RDPMC isn't defined at all. You're assuming that future processor
> > revisions will have the same or substantially similar PerfCtrs as
> > current processors, and nothing guarantees that at all.
>
> Point, but i guess it is reasonable to assume that future x85 CPUs
> will have cycle counter perfctrs. I cannot imagine anybody dropping
> such a basic facility.
It need not necessarily remain configurable to be in PMC 0 however.
Nor do the the PMC MSRs have to remain fixed..
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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