Re: [CFT] faster athlon/duron memory copy implementation

From: Daniel Egger (degger@fhm.edu)
Date: Fri Oct 25 2002 - 08:08:57 EST


Am Don, 2002-10-24 um 21.28 schrieb Manfred Spraul:

> It seems the via cpu doesn't support prefetchnta. Could you try the
> attached version?

egger@tanja:~$ ./via
Athlon test program $Id: fast.c,v 1.6 2000/09/23 09:05:45 arjan Exp $

copy_page() tests
copy_page function 'warm up run' took 24318 cycles per page
copy_page function '2.4 non MMX' took 35819 cycles per page
copy_page function '2.4 MMX fallback' took 35921 cycles per page
copy_page function '2.4 MMX version' took 24291 cycles per page
Illegal instruction

Unfortunately I have no space for gdb on it right now sow I cannot
easily debug where it crashes.

BTW: I did the same thing you did: Remove the calls to the obviously
offending calls to the "fast" versions. I've no idea why the no_prefetch
version doesn't, though...

-- 
Servus,
       Daniel


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