Re: getting processor numbers

[H. Peter Anvin]

Jeremy Fitzhardinge wrote:
> H. Peter Anvin wrote:
> > Mutable data should be separated from code.  I think any current CPU
> > will do fine as long as they are in separate 128-byte chunks, but they
> > need at least that much separation.
> P4 manual says that if one processor modifies data within 2k of another
> processor executing code, it will trash the entire trace cache.

Yuck.  Didn't realize the P4 was that sensitive.  OK, so at the least we 
need a half-page of separation.

	-hpa
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