On Wed, Apr 13, 2005 at 10:11:54AM -0400, Dan Williams wrote: > On Wed, 2005-04-13 at 09:02 -0500, Justin Conover wrote: > > I'm just curious if that makes a difference in speed on amd64, does > > mtune=nocona affect the way k8 processors perform. Or do they for the > > most part have little effect. > > The speed hit (if any) from -mtune=nocona on AMD64 is miniscule, which > cannot be said for using -mtune=k8/opteron/athon64 with Intel EM64T > processors, if I understand some of Jakub's past comments correctly. > Basically, k8+EM64T is worse than nocona+Opteron. Jakub would be more > authoritative on this issue though. What about the speed _gains_? (mtune=k8 on AMD64, mtune=nocona on EM64T) Any data? -- lfr -- 0/0