On Thu, 2005-06-09 at 15:28 +0100, P draigBrady com wrote: > Arjan van de Ven wrote: > > On Thu, Jun 09, 2005 at 10:15:48AM -0400, Dan Williams wrote: > > > >>The question, distilled: > >> > >>Would you like: (a) Small speed hit for Opteron users, OR (b) much > >>larger speed hit for EM64T users? > > > > note the hit is REALLY REALLY small. Hard to measure kind of small. > > Have you compared -march=k8 with -mtune=nocona ? I didn't personally, but our gcc guys did and they said it was hardly measureable if at all.
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