[Beowulf] Moores Law is dying
lindahl at pbm.com
Wed Apr 15 13:00:14 PDT 2009
On Tue, Apr 14, 2009 at 03:44:17PM -0700, Christian Bell wrote:
> Sure, capacity and conflict misses will apply like
> they do in any cache but Jon's statement remains correct -- in SPMD
> applications, you really want all processes to benefit from cache hits in
> your "single program".
... then why do vendors make such a fuss about duplicating program
text pages in big NUMA machines?
As an example:
The issue is that fetching from distant memory is expensive, even if
there's no writing going on. Locality, locality, locality.
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