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Date:	Wed, 13 May 1998 19:38:17 +0200
From:	Marc Lehmann <pcg AT goof DOT com>
To:	beastium-list AT Desk DOT nl
Subject:	Re: pgcc vs AMD K6
Mail-Followup-To:	beastium-list AT Desk DOT nl
References:	<199805122110 DOT XAA20479 AT unknown DOT ruhr DOT de> <3559D3EC DOT ED77B58A AT pev DOT math DOT univ-montp2 DOT fr>
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In-Reply-To:	<3559D3EC.ED77B58A@pev.math.univ-montp2.fr>; from Philippe Elbaz-Vincent on Wed, May 13, 1998 at 07:10:04PM +0200
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On Wed, May 13, 1998 at 07:10:04PM +0200, Philippe Elbaz-Vincent wrote:
> > As I said, you already had 15% by using AMD (compared to 233-MMX-Pentium),
> > so expect only the rest, giving a total of 30%.
> 
> if I may, I want to add  something:
> 
> I have a 233-MMX-P5, a PPro-200 and  a P6-233 (for me p6=Pentium II). If
> you do the Byte-Benchmark (v2.1 I think ?) for all this machines, using
> gcc from the Pentium group, you (well, at least me !) get floating index
> (index=1 is based on a K6-233, using gcc 2.7.2.3) between 1.1 and 1.9
> (the last one is for the p6), thus quite better that for the K6.

the intel clones are all (as I know) relatively weak on floating point. This
is known. The integer performance is much better, though (equal clock
frequency), which is no wonder, the pentium is quite old compared to the k6.

which leaves the price issue.... ;)

> The flag -mamdk6 for the p6 is not a joke ! I usually get the better
> results with this flag, sometime it's 15%-20% faster !!! I don't know if
> someone else also observed this behavior, and I don't know it this is
> relevant for the "Pentium team". I also don't know why -O9 get a little

improvement on what? -O6?

I will drive to northern germany :( to get my new machine, mostly
sponsored by S.u.S.E. in a few minutes, so I will be equipped with
a P-II machine soon. You can be sure these bugs will then vanish veery quickly.
(It's easier to do this "at the machine" than "from the account").

PS: thanks to the people giving me access to their ppro/p-ii/amd machines,
it improved pgcc a lot.

      WARNING: I'm in my monthly flame phase this month.
      
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    The choice of a GNU generation                        |
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