Messages in this thread | | | Subject | Re: [CFT] faster athlon/duron memory copy implementation | From | Pascal Schmidt <> | Date | Thu, 24 Oct 2002 21:33:02 +0200 |
| |
On Thu, 24 Oct 2002 19:20:13 +0200, you wrote in linux.kernel: > 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?
CPU: AMD Duron Spitfire 1 GHz Chipset: ALi 1647 (Magik 1) Memory: 2x 256 MB DDR-SDRAM at 200 MHz
> Please run 2 or 3 times.
CFLAGS="-march=athlon" make athlon
[pharao90@neptune (ttyp2) ~]$ ./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 20604 cycles per page copy_page function '2.4 non MMX' took 26798 cycles per page copy_page function '2.4 MMX fallback' took 27143 cycles per page copy_page function '2.4 MMX version' took 20835 cycles per page copy_page function 'faster_copy' took 12324 cycles per page copy_page function 'even_faster' took 12615 cycles per page copy_page function 'no_prefetch' took 10842 cycles per page [pharao90@neptune (ttyp2) ~]$ ./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 25284 cycles per page copy_page function '2.4 non MMX' took 31419 cycles per page copy_page function '2.4 MMX fallback' took 30724 cycles per page copy_page function '2.4 MMX version' took 25246 cycles per page copy_page function 'faster_copy' took 15462 cycles per page copy_page function 'even_faster' took 16504 cycles per page copy_page function 'no_prefetch' took 10179 cycles per page [pharao90@neptune (ttyp2) ~]$ ./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 22943 cycles per page copy_page function '2.4 non MMX' took 30414 cycles per page copy_page function '2.4 MMX fallback' took 30703 cycles per page copy_page function '2.4 MMX version' took 23345 cycles per page copy_page function 'faster_copy' took 14878 cycles per page copy_page function 'even_faster' took 14902 cycles per page copy_page function 'no_prefetch' took 10872 cycles per page
Note that even_faster is always slower than faster_copy. ;)
-- Ciao, Pascal - 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/
| |