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| Date: | Thu, 12 Oct 2006 16:06:36 +0200 |
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Hi,
on the matter, does anybody have or know of any reasonably serious
benchmarks of the Core2 vs Opteron on 64-bit scientific (possibly HEP)
code ?
Cheers,
Sergio
Stephan Wiesand wrote:
> On Tue, 10 Oct 2006, Ken Teh wrote:
>
>> Questions about Core 2 Duo platforms:
>>
>> Are there any gotchas with SL4x and Core 2 Duo platforms?
>
> Other than the usual issues with young platforms: no, at least for x
> >= 3.
>
> We have a Dell Precision 390 with a 1.86 GHz 6300 here. Even SL307
> works quite well on it. It's supposed to be RHEL4-certified, although
> I can't find it on bugzilla.redhat.com/hwcert. Anyway, you can order
> it with RHEL4 preinstalled.
>
> And it screams...
>
>> Are Core 2 Duo platforms 32-bit or 64-bit? Or, are they like the
>> Opterons
>> and can do both? Would they be installed with the i386 or the x86_64
>> kernels?
>
> They can do both. You choose which flavour you install.
>
>> If it is 64-bit, how does it affect other software? I'm thinking
>> specifically about ROOT, Geant4, ....
>
> Life is still a bit easier if you install 32-bit. It's faster with
> 64-bit *if* your applications are built 64-bit, although the effect is
> more pronounced on AMD CPUs and also depends on the application. ROOT
> works very well, and applications built on it usually benefit
> significantly. I think the same is true for Geant4, maybe after
> removing the word "very" from the statement.
>
--
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Sergio Ballestrero - Physics Dept. - University of the Witwatersrand
http://psi.phys.wits.ac.za/wiki/Ballestrero
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