[gmx-users] Re: parallel in duals?

[David van der Spoel]

Jones de Andrade wrote:
> Hi David.
> 
> Well, it wasn't me who did the test. :)
> 
> My problem is that I cannot try it; I rather have to choose what to
> buy: extra cores, or extra clock frequency?

search the mailing list for woodcrest and you will find Florian Haberl's 
benchmarks.
If you have to buy now, Intel woodcrest seems the way to go.
> 
> Does anybody have an advise on this subject?
> 
> Thank you all...
> 
> Jones
> 
> On 8/1/06, David van der Spoel <spoel at xray.bmc.uu.se> wrote:
> 
>> Jones de Andrade wrote:
>> > Ok, I know this subject have been discussed in the past.
>> >
>> > But I started to wander if the basic conclusion (do not use in 
>> parallel,
>> > you should rather use on job for each core) is still up, and if it is,
>> > if there is any hope of change in a foresight future, as well on how
>> > much real loss is observed from running one process in parallel when
>> > compared to two at the same time.
>> Just try it and you know. Somone reported good performance with
>> hyperhtreading recently (was it you?)
>>
>> >
>> > I'm wondering about this subject due to the arise of the core 2 duo, as
>> > well the expected quad cores from amd and intel and the, semmingly
>> > "affordable", dual processor motherboards from AMD for both dual and
>> > quad-cores.
>> >
>> > Thanks you all,
>> >
>> > Jones
>> >
>> >
>> > 
>> ------------------------------------------------------------------------
>> >
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>>
>> -- 
>> David.
>> ________________________________________________________________________
>> David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
>> Dept. of Cell and Molecular Biology, Uppsala University.
>> Husargatan 3, Box 596,      75124 Uppsala, Sweden
>> phone:    46 18 471 4205        fax: 46 18 511 755
>> spoel at xray.bmc.uu.se    spoel at gromacs.org   http://folding.bmc.uu.se
>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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-- 
David.
________________________________________________________________________
David van der Spoel, PhD, Assoc. Prof., Molecular Biophysics group,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,  	75124 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://folding.bmc.uu.se
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++