On Wed, Sep 08, 2004 at 02:32:43AM -0500, Ron Johnson wrote: > On Tue, 2004-09-07 at 23:16 -0700, Karl Hegbloom wrote: > > Apparently the 2.8GHz nocona is slower than the 1.8GHz Opteron. > > Intel got a lot of "DEC" engineers when it bought the Alpha from > Compaq. Maybe they couldn't stand the thought of working for The > Evil Empire, and joined the Rebellion?
Does gcc support -m64 -march=pentium4? Maybe that would help. Code tuned for an Opteron might well be dog-slow on Nocona. I noticed that most of the benchmarks were faster on the nocona with -m32 instead of 64. The LU decomposition was almost a factor of 2, and that's not really a synthetic benchmark! -- #define X(x,y) x##y Peter Cordes ; e-mail: X([EMAIL PROTECTED] , des.ca) "The gods confound the man who first found out how to distinguish the hours! Confound him, too, who in this place set up a sundial, to cut and hack my day so wretchedly into small pieces!" -- Plautus, 200 BC
