faster athlon/duron memory copy implementation - 2.4.20-pre7 Test

A 2.5.44 test is coming in a moment :-)

processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 6
model name : AMD Athlon(TM) MP 2000+
stepping : 2
cpu MHz : 1680.422
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 sse syscall mmxext 3dnowext 3dnow
bogomips : 3355.44

RAM is PC2100 Registered DDR 512MB
Motherboard/Chipset: A7M266-D AMD 760MPX

lspci info chipset (It's an MPX but also is MP).

00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-760 MP [IGD4-2P] System Controller (rev 11) 00:07.0 ISA bridge: Advanced Micro Devices [AMD] AMD-768 [Opus] ISA (rev 04) 00:07.3 Bridge: Advanced Micro Devices [AMD] AMD-768 [Opus] ACPI (rev 03)
00:10.0 PCI bridge: Advanced Micro Devices [AMD] AMD-768 [Opus] PCI (rev 04)

(more detail)
PCI devices found:
Bus 0, device 0, function 0:

    Host bridge: Advanced Micro Devices [AMD] AMD-760 MP [IGD4-2P] System Controller (rev 17).
      Master Capable.  Latency=32.
      Prefetchable 32 bit memory at 0xf0000000 [0xf7ffffff].
      Prefetchable 32 bit memory at 0xef800000 [0xef800fff].
      I/O at 0xe800 [0xe803].

Bus 0, device 1, function 0:
PCI bridge: Advanced Micro Devices [AMD] AMD-760 MP [IGD4-2P] AGP Bridge (rev 0).
Master Capable. No bursts. Min Gnt=8.

Kernel Preformed on : 2.4.20-pre7

gcc (GCC) 3.2.1 20021011 (prerelease)
Copyright (C) 2002 Free Software Foundation, Inc.

gcc athlon.c -O3 -march=athlon-mp -mcpu=athlon-mp -falign-functions -fomit-frame-pointer -mpreferred-stack-boundary=2 -falign-functions=4 -fschedule-insns2 -fexpensive-optimizations -o 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 20526 cycles per page
copy_page function '2.4 non MMX'         took 23249 cycles per page
copy_page function '2.4 MMX fallback'    took 23114 cycles per page
copy_page function '2.4 MMX version'     took 20693 cycles per page
copy_page function 'faster_copy'         took 11679 cycles per page
copy_page function 'even_faster'         took 12126 cycles per page
copy_page function 'no_prefetch'         took 9323 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 20255 cycles per page
copy_page function '2.4 non MMX'         took 23129 cycles per page
copy_page function '2.4 MMX fallback'    took 23026 cycles per page
copy_page function '2.4 MMX version'     took 20394 cycles per page
copy_page function 'faster_copy'         took 11923 cycles per page
copy_page function 'even_faster'         took 11974 cycles per page
copy_page function 'no_prefetch'         took 9521 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 20459 cycles per page
copy_page function '2.4 non MMX'         took 23211 cycles per page
copy_page function '2.4 MMX fallback'    took 23347 cycles per page
copy_page function '2.4 MMX version'     took 20305 cycles per page
copy_page function 'faster_copy'         took 11944 cycles per page
copy_page function 'even_faster'         took 12016 cycles per page
copy_page function 'no_prefetch'         took 9313 cycles per page

Clearly there seems to be an optimization issue with GCC 3.2.1 as different compilers seem to produce faster results(?)

Also there is ONLY one CPU in this MP machine right now.