[Wien] time difference among nodes

[Peter Blaha]

a) Check your .machines file.  DFoes it meet your expectations, or has 
this node too large load.

b) Can you interactively login into these nodes while your job is running ?
If yes, login on 2 nodes (in two windows) and run    top

c) If nothing obvious is wrong so far, test the network by doing some 
bigger copying from/to these nodes from your $home (or $scratch) to see 
if file-io is killing you.


On 09/21/2015 02:51 PM, Luis Ogando wrote:
> Dear Prof. Marks,
>
>     Many thanks for your help.
>     The administrators said that everything is 0K, the software is the
> problem (the easy answer) : no zombies, no other jobs in the node, ... !!
>     Let me give you more information to see if you can imagine other
> possibilities:
>
> 1) Intel Xeon Six Core 5680, 3.33GHz
>
> 2) Intel(R) Fortran/CC/OpenMPI Intel(R) 64 Compiler XE for applications
> running on Intel(R) 64, Version 12.1.1.256 Build 20111011
>
> 3) OpenMPI 1.6.5
>
> 4) PBS Pro 11.0.2
>
> 5) OpenMPI built using  --with-tm  due to prohibited ssh among nodes  (
> http://www.open-mpi.org/faq/?category=building#build-rte-tm )
>
> 6) Wien2k 14.2
>
> 7) The mystery : two weeks ago, everything was working properly !!
>
>     Many thanks again !
>     All the best,
>                     Luis
>
> 2015-09-18 23:24 GMT-03:00 Laurence Marks <laurence.marks at gmail.com
> <mailto:laurence.marks at gmail.com>>:
>
>     Almost certainly one or more of:
>     * Other jobs on the node
>     * Zombie process(es)
>     * Too many mpi
>     * Bad memory
>     * Full disc
>     * Too hot
>
>     If you have it use ganglia, if not ssh in and use top/ps or whatever
>     SGI has. If you cannot sudo get help from someone who can.
>
>     On Sep 18, 2015 8:58 PM, "Luis Ogando" <lcodacal at gmail.com
>     <mailto:lcodacal at gmail.com>> wrote:
>
>         Dear Wien2k community,
>
>             I am using Wien2k in a SGI cluster with 32 nodes. My
>         calculation is running in 4 nodes that have the same
>         characteristics and only my job is running in these 4 nodes.
>             I noticed that one of these 4 nodes is spending more than 20
>         times the time spent by the other 3 nodes in the run_lapw execution.
>             Could someone imagine a reason for this ? Any advice ?
>             All the best,
>                      Luis
>
>
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-- 

                                       P.Blaha
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Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
Phone: +43-1-58801-165300             FAX: +43-1-58801-165982
Email: blaha at theochem.tuwien.ac.at    WIEN2k: http://www.wien2k.at
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