Messages in this thread |  | | Date | Thu, 20 Sep 2001 01:23:43 +0200 (CEST) | From | Luigi Genoni <> | Subject | Re: [PATCH] Athlon bug stomper. Pls apply. |
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On the Athlon 1300 Mhz with the patch but a working bios i get.
please consider uts 200 Mhz FSB.
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 21709 cycles per page clear_page function '2.4 non MMX' took 13974 cycles per page clear_page function '2.4 MMX fallback' took 13108 cycles per page clear_page function '2.4 MMX version' took 13940 cycles per page clear_page function 'faster_clear_page' took 5341 cycles per page clear_page function 'even_faster_clear' took 5924 cycles per page
copy_page() tests copy_page function 'warm up run' took 20559 cycles per page copy_page function '2.4 non MMX' took 27741 cycles per page copy_page function '2.4 MMX fallback' took 28340 cycles per page copy_page function '2.4 MMX version' took 20802 cycles per page copy_page function 'faster_copy' took 11894 cycles per page copy_page function 'even_faster' took 12288 cycles per page
On Wed, 19 Sep 2001, Arjan van de Ven wrote:
> Dan Hollis wrote: > > > > On Wed, 19 Sep 2001, Linus Torvalds wrote: > > > It is _probably_ an undocumented performance thing, and clearing that > > > bit may slow something down. But it might also change some behaviour, > > > and knowing _what_ the behaviour is might be very useful for figuring > > > out what it is that triggers the problem. > > > > AFAIK noone has even tested it yet to see what it does to performance! Eg > > it might slow down memory access so that athlon-optimized memcopy is now > > slower than non-athlon-optimized memcopy. And if it turns out to be the > > case, we might as well just use the non-athlon-optimized memcopy instead > > of twiddling undocumented northbridge bits... > > Ok but that part is simple: > > run > > http://www.fenrus.demon.nl/athlon.c > > ..... > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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