[gmx-users] Perplexed about MPI

K.A. Feenstra Feenstra at chem.vu.nl
Mon Nov 4 08:33:10 CET 2002


dr.horsfield at physics.org wrote:
> 
> Hi,
> 
> I have begun to despair of MPI! I have LAM-MPI 6.5.7 installed. It passes
> the test suite perfectly, and the Pallas MPI benchmarks run fine. I have
> gromacs 3.1.4 installed, and I have compiled it for MPI. A particular
> small job runs fine on 2 processors (either on the same box, or on two
> boxes), but falls over immediately on 3 or 4, with the error:
[...]
> Could the problem be that the number of atoms on each node is not the same
> for 3 or 4 processors? Any suggestions?

Did the files md0.log, md1.log, md3.log and so on get generated?
If so, have you had a look at them? They are from each of the 
individual mdrun processes.

-- 
Groetjes,

Anton
 ________ ___________________________________________________________
|        | Anton Feenstra                                            |
| .      | Dept. of Pharmacochemistry - Vrije Universiteit Amsterdam |
| |----  | De Boelelaan 1083 - 1081 HV Amsterdam - The Netherlands   |
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| ' __   | Feenstra at chem.vu.nl - http://www.chem.vu.nl/afdelingen/FAR|
|  /  \  |-----------------------------------------------------------|
| (    ) | Dept. of Biophysical Chemistry - University of Groningen  |
|  \__/  | Nijenborgh 4 - 9747 AG Groningen - The Netherlands        |
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|  /  \  | K.A.Feenstra at chem.rug.nl - http://md.chem.rug.nl/~anton   |
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|  \__/  | "If You See Me Getting High, Knock Me Down"               |
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