[RC5] Performance on P-IV

Enojon enojon at ATTGLOBAL.NET
Sat May 12 16:24:59 EDT 2001


It is slower, read the prior posts...   IV mimicks the instructions for
prior P5/6 classes.

----- Original Message -----
From: "Ferry van Steen" <td at salesint.com>
To: <rc5 at lists.distributed.net>
Sent: Friday, May 11, 2001 3:54 AM
Subject: Re: [RC5] Performance on P-IV


> Well to be exact I get about twice the performance of a P-IV 1400 on my
> Athlon 1GHz (1000) at the moment hehe and I figure it will take quite a
> while before everything will be optimized. Appearantly Windows ME ain't
> optimized either. Atleast I don't notice a vast performance improvement
over
> a P-III 800 at 133, in fact it feels like it's even slower.......
>
> ----- Original Message -----
> From: "Bjoern Martin" <boris59 at gmx.net>
> To: <rc5 at lists.distributed.net>
> Sent: Thursday, May 10, 2001 4:51 PM
> Subject: Re: [RC5] Performance on P-IV
>
>
> >
> > >Hey I've got some sad sad sad statistics.
> > >[...]
> > >Hope somebody can explain this....
> >
> > Doesn't make much sense to run statistics now, as the P-IV has
> > to be specially supported for - kind of at least. I only got 1
> > cent for this one as I'm no hardware guru:
> > The pipeline of the P-IV is pretty long (i think 12 clocks). This
> > means, every instruction takes 12 clocks. That's not a problem,
> > as when the first instruction moved on 1 clock, the second one
> > can start. So you might have a max of 12 instructions running the
> > same time. BUT: if the software isn't aware of this (i.e.,
> > compiled for older processors, as nearly 100% of today's software),
> > this isn't an advantage, but quite the opposite. Nowadays it's
> > pretty normat that an Athlon running 1,2 GHz outruns a P-IV 1,4
> > easily. This will improve in favor of the P-IV if you recompile
> > with optimized compilers (Intel's words), but Dnet's cores are
> > normally optimized in assembler. So just be a little patient.
> >
> > So what do the gurus say, is this guess true? :)
> >
> > Bye,
> >
> > Bjoern, Team #6941
> >
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