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

[Andreas Steinmetz <ast@domdv.de>]

Athlon TB 900/VIA KT133

titanic:/tmp # cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 4
model name      : AMD Athlon(tm) Processor
stepping        : 2
cpu MHz         : 902.075
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
bogomips        : 1795.68

titanic:/tmp # gcc -O3 -s -o athlon athlon.c
titanic:/tmp # ./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 13359 cycles per page
copy_page function '2.4 non MMX'         took 20749 cycles per page
copy_page function '2.4 MMX fallback'    took 20737 cycles per page
copy_page function '2.4 MMX version'     took 13545 cycles per page
copy_page function 'faster_copy'         took 8132 cycles per page
copy_page function 'even_faster'         took 8123 cycles per page
copy_page function 'no_prefetch'         took 7648 cycles per page
titanic:/tmp # ./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 13398 cycles per page
copy_page function '2.4 non MMX'         took 20774 cycles per page
copy_page function '2.4 MMX fallback'    took 20749 cycles per page
copy_page function '2.4 MMX version'     took 13349 cycles per page
copy_page function 'faster_copy'         took 8130 cycles per page
copy_page function 'even_faster'         took 8168 cycles per page
copy_page function 'no_prefetch'         took 7631 cycles per page
titanic:/tmp # ./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 13470 cycles per page
copy_page function '2.4 non MMX'         took 20780 cycles per page
copy_page function '2.4 MMX fallback'    took 20784 cycles per page
copy_page function '2.4 MMX version'     took 13384 cycles per page
copy_page function 'faster_copy'         took 8172 cycles per page
copy_page function 'even_faster'         took 8137 cycles per page
copy_page function 'no_prefetch'         took 7633 cycles per page
titanic:/tmp # ./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 13377 cycles per page
copy_page function '2.4 non MMX'         took 20764 cycles per page
copy_page function '2.4 MMX fallback'    took 20831 cycles per page
copy_page function '2.4 MMX version'     took 13336 cycles per page
copy_page function 'faster_copy'         took 8140 cycles per page
copy_page function 'even_faster'         took 8131 cycles per page
copy_page function 'no_prefetch'         took 7670 cycles per page

--
Andreas Steinmetz
D.O.M. Datenverarbeitung GmbH