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

[Ryan Cumming <ryan@completely.kicks-ass.org>]

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On October 24, 2002 10:15, Manfred Spraul wrote:
> Attached is a test app that compares several memory copy implementations.
> Could you run it and report the results to me, together with cpu,
> chipset and memory type?
>
> Please run 2 or 3 times.

Athlon XP 1800+, 512MB 133mhz SDRAM, Debian GCC 3.2.1 snapshot.

~$: gcc -march=athlon-xp -O2 athlon.c -o athlon
~$: ./athlon; ./athlon; ./athlon
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 28161 cycles per page
copy_page function '2.4 non MMX'         took 31398 cycles per page
copy_page function '2.4 MMX fallback'    took 31442 cycles per page
copy_page function '2.4 MMX version'     took 28130 cycles per page
copy_page function 'faster_copy'         took 19112 cycles per page
copy_page function 'even_faster'         took 17413 cycles per page
copy_page function 'no_prefetch'         took 12708 cycles per page
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 28171 cycles per page
copy_page function '2.4 non MMX'         took 31226 cycles per page
copy_page function '2.4 MMX fallback'    took 31178 cycles per page
copy_page function '2.4 MMX version'     took 28055 cycles per page
copy_page function 'faster_copy'         took 17193 cycles per page
copy_page function 'even_faster'         took 17287 cycles per page
copy_page function 'no_prefetch'         took 12711 cycles per page
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 27955 cycles per page
copy_page function '2.4 non MMX'         took 31069 cycles per page
copy_page function '2.4 MMX fallback'    took 33483 cycles per page
copy_page function '2.4 MMX version'     took 27917 cycles per page
copy_page function 'faster_copy'         took 17120 cycles per page
copy_page function 'even_faster'         took 17271 cycles per page
copy_page function 'no_prefetch'         took 12712 cycles per page

- -Ryan
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