> 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.
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