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.