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SubjectRe: [CFT] faster athlon/duron memory copy implementation
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Manfred Spraul <manfred@colorfullife.com> writes:

> 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?

Duron 1200, Elitegroup K7VTA3, 512 MB (DDR PC266 CL2.5)

$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 7
model name : AMD Duron(tm) processor
stepping : 1
cpu MHz : 1200.023
cache size : 64 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 sse syscall mp mmxext 3dnowext 3dnow
bogomips : 2367.48

$ lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8367 [KT266]
00:01.0 PCI bridge: VIA Technologies, Inc. VT8367 [KT266 AGP]
00:11.0 ISA bridge: VIA Technologies, Inc. VT8233 PCI to ISA Bridge
00:11.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)

$ gcc -v
Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs
gcc version 2.95.4 20011002 (Debian prerelease)

$ gcc athlon.c -o 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 15795 cycles per page
copy_page function '2.4 non MMX' took 16958 cycles per page
copy_page function '2.4 MMX fallback' took 16862 cycles per page
copy_page function '2.4 MMX version' took 15792 cycles per page
copy_page function 'faster_copy' took 9576 cycles per page
copy_page function 'even_faster' took 9385 cycles per page
copy_page function 'no_prefetch' took 7637 cycles per page
$ ./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 15802 cycles per page
copy_page function '2.4 non MMX' took 16957 cycles per page
copy_page function '2.4 MMX fallback' took 16897 cycles per page
copy_page function '2.4 MMX version' took 15854 cycles per page
copy_page function 'faster_copy' took 9564 cycles per page
copy_page function 'even_faster' took 9407 cycles per page
copy_page function 'no_prefetch' took 7649 cycles per page
$ ./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 15807 cycles per page
copy_page function '2.4 non MMX' took 16995 cycles per page
copy_page function '2.4 MMX fallback' took 17056 cycles per page
copy_page function '2.4 MMX version' took 16431 cycles per page
copy_page function 'faster_copy' took 9832 cycles per page
copy_page function 'even_faster' took 9389 cycles per page
copy_page function 'no_prefetch' took 7657 cycles per page
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