Optimizing for Athlon??
 

George, I found this but don't know if you have seen it. I was wondering if the info would help with optimizing for the Athlon?


http://139.95.253.213/SRVS/CGI-BIN/WEBCGI.EXE/,/?St=92,E=0000000000034319204,K=8754,Sxi=1,Case=obj(2047)

Afaik, 3DNow! instructions are of no use for GIMPS puropses, and Athlon optimizations are dated v. 21.2

As for optimizing prefetch code,

[quote]
New features in Version 21.2 of prime95.exe
-------------------------------------------
The program now uses the prefetch instructions on the Celeron 2, Pentium 3,
and all Athlon CPUs. This results in about a 20% performance boost on
these machines.
[/quote]

Hope this helps :?

Luigi

I've seen the document. It is not particularly helpful.

If I had an Athlon and plenty of free time, I could probably make a faster version for the Athlon. Its cache architecture is different than the PIII and P4, so some improvements should be possible. Just off the top of my head, I'd guess 5-10%.

Of course, I have neither an Athlon nor plenty of free time!

If you would like I can mail you a 550Mhz Athlon classic (mobo, case, ram, some sdr, and a dvd drive, no vid/nic/HDD, needs a 300W uATX psu) or maybe some other kit. I do not want to part with my axp's, with the TPR gauntlet starting, but if you are willing to wait a month, I could send you a temp AXP 2000+ k7s5a 256DDR(5% of my production or so :D :( )(complete system). You would have to pay shipping both ways, though.

Or maybe someone could donate for shipping.

Getting George a box is trivial... Getting him time, however... :shock:

[quote="Xyzzy"]Getting George a box is trivial... Getting him time, however... :shock:[/quote]

I figured that much. How many people still do assembly programming these days? :-)

BTW, all of my machines are Intel. :-)

i would also be intrested in a version of prime Optimizing for Athlon

( i know there is a shortage of free time now a days )