Re: mtune=nocona

[Horst von Brand <vonbrand inf utfsm cl>]

Arjan van de Ven <arjanv 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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