[Pw_forum] timing vs QE version vs pools

[Giovanni Cantele]

Giovanni Cantele wrote:
> Marino Vetuschi Zuccolini wrote:
>   
>> Dear Giovanni,
>> I'm testing our system with more or less the same configuration. Can  
>> you send me the input you used in testing your cluster?
>>
>> Many thanks.
>>
>> m.
>>   
>>     
> warning: k point list just for testing purposes (I just tried to get 
> those specific numbers
> of k-points)
>
>
>
> Please let me know your the results of your tests, I would be curious to
> compare with mines.
>
> Giovanni
>   

sorry, due to too many blanks in the files, they are badly displayed in 
the e-mail I sent.
I'm resending them again, in attachment, with blanks removed!

Sorry for duplicating the message.

Giovanni
>
>
>   
>> On 6 Mar 2009, at 18:15, Giovanni Cantele wrote:
>>
>>   
>>     
>>> Dear all,
>>>
>>> I just finished some timing tests relative to QE, stimulated by recent
>>> discussions in this forum.
>>> I would like to share these tests, and ask  a couple of simple (?)
>>> questions.
>>>
>>> Up to now, even if not supported by systematic tests, my feeling has
>>> been that
>>> for the kind of runs I'm doing on the kind of cluster(s) I'm using,  
>>> the
>>> following rules hold:
>>>
>>> i) if using a relatively "small" number of CPUs, pools are rather
>>> ineffective, I often realized that
>>> using pools actually increased job execution time
>>>
>>> ii) diagonalization parallelism (-ndiag XX) is ineffective as well
>>>
>>> iii) version 3.2.3 is "better" than 4.0.4
>>>
>>>     
>>>       
>> ...
>>
>> *******************************************************
>> Marino Vetuschi Zuccolini
>> zucco at dipteris.unige.it
>> Researcher / Geochemist
>> Laboratory of Geochemistry
>>
>> DIPartimento per lo studio della TErra e delle sue RISorse -  
>> Università  di Genova
>> Tel. ++39 010 3538136 Fax. ++39 010 352169
>> Corso Europa 26, 16132 - Genova - Italy
>>
>>
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>> Pw_forum at pwscf.org
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>>
>>   
>>     
>
>
>   


-- 



Dr. Giovanni Cantele
Coherentia CNR-INFM and Dipartimento di Scienze Fisiche
Universita' di Napoli "Federico II"
Complesso Universitario di Monte S. Angelo - Ed. 6
Via Cintia, I-80126, Napoli, Italy
Phone: +39 081 676910
Fax:   +39 081 676346
E-mail: giovanni.cantele at cnr.it
        giovanni.cantele at na.infn.it
Web: http://people.na.infn.it/~cantele
Research Group: http://www.nanomat.unina.it

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