Re: Alpha 500 vs Bi Ppro.

Andi Kleen (andi@mind.aec.at)
16 May 1997 09:59:10 +0200


Chris Arguin <cpa@hopper.unh.edu> writes:

> On Thu, 15 May 1997, Yann DUPONT wrote:
>
> > Today we were comparing
> > a Bi Ppro 200 (128 Mo Ram) & A No-name Alpha 500 Mhz (21164 Ev5) 256 Mo Ram
> > 1Mo cache.
> ...
> > To our great disapointment, it seems that the pentium Pro is faster
> > than the Alpha. We weren't expecting that.
> >
> > Ok, maybe we didn't test it the right way, and we will give it another
> > try with a more serious benchmark. Anyway, today we tested:
> >
> > Compilation :
> >
> > For exemple we compiled Python 1.4
> > (make -j)
> >
> > on bip (Bi pentium pro) => 26 sec.
> > on Alpha => 57 sec
> >
> > Ok, maybe the code generation on alpha is longer ?
>
> Compiling RISC code does take a lot longer, and GCC isn't exactly
> optomized for the Alpha anyway. Also, when you say "Bi pentium pro", do
> you mean you actually have two pentium pro processors? I ask simply
> because I've never seen it written that way. That would make a big
> difference as well. Get two alpha chips and the alpha would probably win.
> Or try something besides compiling code.
>
> > We didn't test floating point yet, it's not a priority for us. Maybe
> > this is a point where Alpha can blast the Ppro ?
>
> If I remember correctly, at equal clock speeds the Alpha will beat a PPro
> at floating-point, and a PPro will beat the Alpha at integer opperations.

Nope, the 21164 will beat the PPro at integer operations too.

-Andi