Re: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata

Andi Kleen
2003-09-15T18:30:40Z

Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> Its kind of irrelevant when by saying "Athlon" you've added 128 byte
^^^^^^^
> alignment to all the cache friendly structure padding. There are systems
> where memory matters, but spending a week chasing 300 bytes when you can
> knock out 50K is a waste of everyones time. Do the 40K problems first

I suspect Alan meant "P4" above, Athlon only adds 64byte padding.
Default is 32 byte for 686.

But it's interesting how a typo can serve as a basis for much further
discussion in this thread @)

-Andi