Message boards : Number crunching : lhc@home and simd
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pier

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Message 20348 - Posted: 14 Sep 2008, 15:04:00 UTC

l@h use simd?

like sse, sse2, 3dnow, mmx ?

Thx for anwsers.
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pier

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Message 20390 - Posted: 16 Sep 2008, 20:00:57 UTC - in response to Message 20348.  

someone can reply!?
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Klimax

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Message 20417 - Posted: 18 Sep 2008, 10:33:56 UTC

At most I think mmx.,but not sure.
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tullio

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Message 20420 - Posted: 18 Sep 2008, 16:23:41 UTC - in response to Message 20348.  

l@h use simd?

like sse, sse2, 3dnow, mmx ?

Thx for anwsers.

At SETI@home you can choose an optimized application for your OS and your CPU with SIMD support. However, the latest program called Astropulse so far does not run on optimized applications and runs only on the standard SETI client. Also note tha SETI apps are open source, like BOINC, that is you can download the source code and modify it, if you dare!
Tullio
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pier

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Message 20430 - Posted: 19 Sep 2008, 7:03:32 UTC - in response to Message 20420.  

l@h use simd?

like sse, sse2, 3dnow, mmx ?

Thx for anwsers.

At SETI@home you can choose an optimized application for your OS and your CPU with SIMD support. However, the latest program called Astropulse so far does not run on optimized applications and runs only on the standard SETI client. Also note tha SETI apps are open source, like BOINC, that is you can download the source code and modify it, if you dare!
Tullio


seti are useless...
thanks for replies!!
So, lhc prefer to keep more compatibility instead of performace.
rigth choose is a scientific result, anyway simd are very powerful.
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Grutte Pier [Wa oars]~GP500

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Message 20438 - Posted: 20 Sep 2008, 11:47:08 UTC

most prabaly sse and sse2.

This app. is not that old and SSE2 even has been here for more then 5 years i tink, P4\'s amd K7.

If they used a good compiler, wich i tink they do.
It is auto on when able.
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Profile Keck_Komputers

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Message 20448 - Posted: 20 Sep 2008, 19:13:03 UTC

The reason the sixtrack app may not use simd instructions is for compatibility. They need identical results. They do not even use standard math libs for this reason, since those can vary for each generation of CPU.
BOINC WIKI

BOINCing since 2002/12/8
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Message boards : Number crunching : lhc@home and simd


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