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SubjectRe: [CFT] faster athlon/duron memory copy implementation
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On Thu, 24 Oct 2002, Manfred Spraul wrote:

> AMD recommends to perform memory copies with backward read operations
> instead of prefetch.
>
> http://208.15.46.63/events/gdc2002.htm
>
> 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.

Here you are, three runs, shown is: floor((n1+n2+n3)/3)
where n_i is the results (cycles/page) of the i-th run of the respective test

Duron 700, Via KT133, PC133 (manuf. date 12/2000): (machine was NOT idle)

'warm up run' 11445
'2.4 non MMX' 22374
'2.4 MMX fallback' 20075
'2.4 MMX version' 17611
'faster_copy' 11103
'even_faster' 7225
'no_prefetch' 6549

Athlon XP1600+, Via KT333, PC2100 (manuf. date 10/2002): (idle)

'warm up run' 14106
'2.4 non MMX' 15382
'2.4 MMX fallback' 15416
'2.4 MMX version' 14103
'faster_copy' 8793
'even_faster' 8797
'no_prefetch' 6351

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