On 17 September 2015 at 18:56, Jeff Squyres (jsquyres)
<jsquy...@cisco.com> wrote:
> On Sep 17, 2015, at 11:44 AM, Joel Hermanns <joel.herma...@gmail.com> wrote:
>>
>> Thanks for the quick answer!
>
> Be sure to see Nick's answer, too -- mpi4py is a nice package.
>
>> I have a few questions now:
>>
>> 1. Are there any downsides of using —disable-dlopen?
>
> You won't be able to add or remove plugins in the filesystem after you do the
> Open MPI installation. But that's a pretty unusual thing to do, so I
> wouldn't worry about it.
>
>> 2. Are there any other options? We might not be able to change MPI
>> installation, when this is running on a supercomputer.
>
> I'm not super familiar with Python and its extension capabilities -- Nick's
> email implies that there's a different way to solve the problem, and I
> confess to not remembering what mpi4py does, offhand.
>
mpi4py just calls
dlopen("libmpi.so", RTLD_NOW | RTLD_GLOBAL | RTLD_NOLOAD);
before calling MPI_Init(), see the code below:
https://bitbucket.org/mpi4py/mpi4py/src/master/src/lib-mpi/compat/openmpi.h?fileviewer=file-view-default#openmpi.h-52
--
Lisandro Dalcin
============
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