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Date: Wed, 12 Aug 1998 21:29:01 +0200
From: Marc Lehmann <pcg AT goof DOT com>
To: Pan Xing <panxin AT kali DOT com DOT cn>, beastium-list AT Desk DOT nl
Subject: Re: Pgcc Slower than Gcc???(Not in mailist, re me diretly, Thx)
Mail-Followup-To: Pan Xing <panxin AT kali DOT com DOT cn>, beastium-list AT Desk DOT nl
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In-Reply-To: <35CDB2C6.F3D49819@kali.com.cn>; from Pan Xing on Sun, Aug 09, 1998 at 10:31:34PM +0800
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On Sun, Aug 09, 1998 at 10:31:34PM +0800, Pan Xing wrote:


> MS's VC++5.0,  it's about 63Mflops .vs. 70 Mflops. Tested with the
> wellknown flops.c (1992 version)

can send me a link of flops.c? or, if it isn't too large, the file
itself?

>     I hear that Pgcc can deliver about 2-30% more power than gcc
> generally, So I tested it and gcc again this evening.
> My box is Pii233,64M, Slackware34/linux2.0.30, libc5.44. Test program:

>  It seems that the result under Xterm is faster but the one under Ascii
> mode is more accurate. Why, I guess
> In Intel's chip only its internal parallism may affect its difference?

could you try to run the benchmarks so it gives predictable results?
Your results are different enough to be meaningless, I fear.

>         --funroll-all-loops -malign-double -mstack-align-double
> -marg-align-double -mpentium,
>         All could not save me from the bad luck.
>         I installed the pgcc as the readme and install reference in the
> package instructed me . ( patch, configure, make, make install under
> /usr/local/), What's wrong with it?  I also got the comiled binary of
> pgcc2.90, no help.

It might be some weird alignment issue, but as I have almost an identical
setup, I can check it out myself.

      -----==-                                              |
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