[Users] MPI problems

[Chris Stevens]

Hi Ian,

thanks for spotting that. Unfortunately there is only the hwloc 
directory in external. There is an MPI file (just called MPI) in the 
done directory.

I have recompiled with the fix you mentioned but I still get the same error.

Cheers,

Chris


On 05/16/2017 09:43 AM, Ian Hinder wrote:
>
> On 16 May 2017, at 08:52, Chris Stevens <c.stevens at ru.ac.za 
> <mailto:c.stevens at ru.ac.za>> wrote:
>
>> Hi Ian,
>>
>> thanks for your quick reply!
>>
>> There are a couple of other guys here who have successfully used the 
>> toolkit with this version of openmpi, so I'm not sure if this is at 
>> fault. There is not another version of openmpi available currently on 
>> the cluster, but I could ask for this to be remedied.
>>
>> I have tried using procs=48 and num-threads=2 but I find the same 
>> problem.
>>
>> As you say, I recompiled a clean config to double check. I have also 
>> used the May 16 version but to no avail.
>>
>> Could it be something to do with compilation, that has gone wrong 
>> somehow, even though it finishes successfully with done?
>>
> Is it possible that it is building and using its own copy of OpenMPI? 
>  The build system is "clever", and the logic for when it decides to do 
> this seems a bit flaky.  [I would be a lot happier if it only built a 
> library from the bundled source if it was explicitly asked for in the 
> optionlist with a BUILD setting, not as a fallback to something going 
> wrong when trying to use the settings the user has given.]
>
> I noticed that you have
>
> MPI_DIR = /apps/libs/openmpi/1.8.8-intel16.0.1/lib
>
> in the optionlist, which is wrong; it should not have the "lib" on the 
> end.  I didn't think anything of it at the time, since you were 
> specifying the other directories.  But maybe the MPI thorn is deciding 
> that since it can't find a valid MPI installation, it will helpfully 
> decide to build OpenMPI for you.  This version may then conflict with 
> the rest of the configuration.
>
> Can you look and see if there is a built version of OpenMPI in the 
> config?  I think it would be in configs/<config>/scratch/external.
>
> -- 
> Ian Hinder
> http://members.aei.mpg.de/ianhin
>

-- 
Dr Chris Stevens

Department of Mathematics

Rhodes University

Room 5

Ph: +27 46 603 8932

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