Re: [PATCH] Athlon bug stomper. Pls apply.

[Vojtech Pavlik <vojtech@suse.cz>]

On Wed, Sep 19, 2001 at 09:15:17PM +0000, Petr Vandrovec wrote:
> On 19 Sep 01 at 19:55, Arjan van de Ven wrote:
> > 
> > Ok but that part is simple:
> > 
> > run
> > 
> > http://www.fenrus.demon.nl/athlon.c
> 
> Small question - is it OK that 'faster_copy' is faster than
> 'even_faster'? By only few percents, but... It is dual cpu Tyan,
> with two AMD MP 1.2MHz, with 1022:700C AMD hostbridge. I'll
> check KT133 at home if I'll remember...

Same here. In a quite number of cases, even_faster is actually slower.
Not always, though. I suspect the measurement is not really exact.

>                                         Thanks,
>                                                 Petr Vandrovec
>                                                 vandrove@vc.cvut.cz
>                                                 
> 
> Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $ 
> clear_page() tests 
> clear_page function 'warm up run'    took 13967 cycles per page
> clear_page function '2.4 non MMX'    took 9298 cycles per page
> clear_page function '2.4 MMX fallback'   took 9284 cycles per page
> clear_page function '2.4 MMX version'    took 8508 cycles per page
> clear_page function 'faster_clear_page'  took 4016 cycles per page
> clear_page function 'even_faster_clear'  took 3916 cycles per page
> 
> copy_page() tests 
> copy_page function 'warm up run'     took 15118 cycles per page
> copy_page function '2.4 non MMX'     took 17002 cycles per page
> copy_page function '2.4 MMX fallback'    took 16978 cycles per page
> copy_page function '2.4 MMX version'     took 15163 cycles per page
> copy_page function 'faster_copy'     took 8569 cycles per page
> copy_page function 'even_faster'     took 8805 cycles per page
> -
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-- 
Vojtech Pavlik
SuSE Labs