Memory distribution

Run-time issues concerning Yambo that are not covered in the above forums.

Moderators: myrta gruning, andrea marini, Daniele Varsano, Conor Hogan

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amolina
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Memory distribution

Post by amolina » Wed Jan 30, 2013 10:27 am

Dear all,

how it works the option -M in yambo?

Best regards,

Alejandro.
Alejandro Molina-Sánchez
Institute of Materials Science (ICMUV)
University of Valencia, Spain

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claudio
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Re: Memory distribution

Post by claudio » Wed Jan 30, 2013 11:57 am

Ciao Alejandro

just run a parallel calculation (optics or GW) and put -M in your script
you will see something like:

<---> [Distribute] Average allocated memory is [o/o]: 35.00000

that is telling you how much the memory usage was reduced

Claudio
Claudio Attaccalite
[CNRS/ Aix-Marseille Université/ CINaM laborarory / TSN department
Campus de Luminy – Case 913
13288 MARSEILLE Cedex 09
web site: http://www.attaccalite.com

hlee
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Re: Memory distribution

Post by hlee » Tue Mar 17, 2015 4:02 pm

Dear All:

> <---> [Distribute] Average allocated memory is [o/o]: 35.00000
> that is telling you how much the memory usage was reduced
What does "35.00000" mean in the above line?

In my calculation, the l-* file reads the following:
<01s> [Distribute] Average allocated memory is [o/o]: 9.023438

Does "9.023438" mean 9.023438 GB per CORE? But, our cluster has only 4GB memory per core.

Regards.
Dr. Hyungjun Lee
Institute of Theoretical Physics, EPFL

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Daniele Varsano
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Re: Memory distribution

Post by Daniele Varsano » Tue Mar 17, 2015 4:05 pm

Dear Hyungjun,
that number is a percentage.
So the relative reduction with respect a calculation without memory distribution.
Hope it is clear,

Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
http://www.max-centre.eu/

hlee
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Joined: Mon Jul 15, 2013 2:09 pm

Re: Memory distribution

Post by hlee » Tue Mar 17, 2015 5:15 pm

Dear Daniele Varsano:

Thank you very much for your quick reply.
I am very sorry. I was too stupid to realize that "o/o" means "%".

I am always grateful to you for your great effort for maintaing the code and this forum.

Regards.
Dr. Hyungjun Lee
Institute of Theoretical Physics, EPFL

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