Arjan van de Ven <arjanv(a)redhat.com> wrote:
> Of course, on through -m64 was as expected. I'm just a bit
surprised
> that it didn't say mtune=k8 since it was definitely building on one ...
> which begs the question ... is GCC (and hence the entire x86_64
> distribution) being built this way? What are the K8 performance
> implications? I've seen a few things that indicate that Nocona cores
> running K8 code look pretty bad in some areas compared to optimized
> code...however, I find nothing to indicate how nocona optimized code
> runs on the K8.
AMD cpus are very good at running just about anything you throw at
it
(think about it; with their marketshare... most code out there is
optimized for intel cpus so their cpus are effectively required to deal
well with such code). The reverse unfortunatly isn't the case.
AFAIU, they are talking about /64 bit/ code here. There the situation is
almost exactly the other way around, isn't it?
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