[MITgcm-support] MPI on SGI

[Ryan Abernathey]

Hi Nikki,

It will be easier to figure out what's going on if you tell us which  
optfile you are using at build time (specified in your genmake2  
command) and also exactly how you are calling the executable at run  
time (your job sumbmission script).

-R


On Jun 10, 2011, at 5:53 PM, Nikki Lovenduski wrote:

> Hi all,
>
> I'm trying to run the sector model version of MITgcm on an SGI Altix  
> HPCC.  The model runs fine on 1 processor.  However, I am having  
> trouble running on 16 processors:  The compilation works fine (I add  
> -mpi to my genmake2 command and specify nPx = 2 and nPy = 8 in  
> SIZE.h), but I get an error at execution in the routine INI_PROCS.
>
> *** ERROR *** S/R INI_PROCS: No. of processes not equal to  
> nPx*nPy    1   16
>
> This error message indicates that MPI only assigns 1 processor to my  
> run; whereas, it should be running on nPx*nPy=16 processors.
>
> My job submission script specifies the correct number of processors  
> (-n 16).
>
> Any ideas what I'm doing wrong?
>
> Thanks,
> Nikki
>
> ----------------------
> Nikki Lovenduski
> ATOC/INSTAAR
> Univ. Colorado at Boulder
>
>
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