Problem with parallelization and fragmentation

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

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

Problem with parallelization and fragmentation

Postby tolsen » Mon Feb 07, 2011 3:34 pm

Hi

I am running the yambo 3.2.3 revision 676.

It seems like any calculation I try is not properly parallelized when I use the -S option. Everything works fine in parallel without the -S option, but with it, I get several output files and the top of all the r_... files says ....x 001 CPUs .....

I did not have any problems with the compilation. Earlier I have used the 3.1.1 version without having this problem.

Any suggestions would be greatly appreciated.

BR
Thomas Olsen
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Technical University of Denmark
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Re: Problem with parallelization and fragmentation

Postby andrea marini » Mon Feb 07, 2011 6:18 pm

Dear Thomas, the problem was solved last November in the revision 15 of the GPL trunk (internal revision number, the one you're referring to, was 682). To solve the problem you can either download the latest source (or patch file) or you can become member of the QE-forge Yambo project in order to access directly the SVN repo. More instructions in download page.

Andrea
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Re: Problem with parallelization and fragmentation

Postby tolsen » Mon Feb 07, 2011 6:39 pm

Dear Andrea

Thanks for the quick reply.Before my post, I actually tried to obtain the latest version in the SVN to solve the problem. However, after having signed up at QE-FORGE (username tolsen) I tried

svn checkout svn+ssh://QE-FORGE-tolsen@scm.qe-forge.org/svn/yambo

but just get thet message

svn: Network connection closed unexpectedly

Is this a problem with my svn or did I not sign up correctly at QE-FORGE? I am not sure how to get the latest version without the SVN. I think the version I am using is the latest tarball.

BR
Thomas Olsen
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Re: Problem with parallelization and fragmentation

Postby andrea marini » Mon Feb 07, 2011 6:42 pm

Dear Thomas,

you do not have to replace the USERNAME in QE-FORGE-USERNAME with the one of the forum. Please, follow the instructions. You need to register on the qe-forge portal and ask to be member of the Yambo project. It is everything written in the download page.

Andrea
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Re: Problem with parallelization and fragmentation

Postby tolsen » Mon Feb 07, 2011 7:23 pm

Dear Andrea

Sorry for the confusion, but I have of course registered with QE-FORGE. I just happened to use the same username as the one I use here. The problem is as described above.

BR
Thomas
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Re: Problem with parallelization and fragmentation

Postby Daniele Varsano » Mon Feb 07, 2011 7:28 pm

Dear Thomas,

I think you should try:
svn+ssh://tolsen@scm.qe-forge.org/svn/yambo

Cheers,

Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
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Re: Problem with parallelization and fragmentation

Postby tolsen » Mon Feb 07, 2011 7:35 pm

Hi

That gives the same result. But perhaps (as implied by Andrea above) I have to request to join?
I just though that is for developers only?

Br
Thomas
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Re: Problem with parallelization and fragmentation

Postby Daniele Varsano » Tue Feb 08, 2011 8:50 am

Yes, you have.
You have to be registered in QE-FORGE. You will be listed as user, in this way you can
download the svn version. I saw you joinied, now everything should work!

Cheers,

Daniele
Dr. Daniele Varsano
S3-CNR Institute of Nanoscience and MaX Center, Italy
MaX - Materials design at the Exascale
http://www.nano.cnr.it
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Re: Problem with parallelization and fragmentation

Postby tolsen » Tue Feb 08, 2011 3:01 pm

Dear Daniel and Andrea

Thanks for the help. I managed to download the latest svn version after having uploaded a key to qe-forge, and the new version solved my problem as expected:-)

BR
Thomas Olsen
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Posts: 32
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