Re: Success report: installing pure64 on a dell poweredge 1850
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(peter@cor , 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
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