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Subject: Re: [OMPI users] OpenMPI on Windows when MPI_F77 is used from a C application
From: Rayson Ho (raysonlogin_at_[hidden])
Date: 2012-10-29 12:45:26


Mathieu,

Can you include the small C program you wrote??

Rayson

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On Mon, Oct 29, 2012 at 12:08 PM, Damien <damien_at_[hidden]> wrote:
> Mathieu,
>
> Where is the crash? Without that info, I'd suggest turning off all the
> optimisations and just compile it without any flags other than what you need
> to compile it cleanly (so no /O flags) and see if it crashes.
>
> Damien
>
>
> On 26/10/2012 10:27 AM, Mathieu Gontier wrote:
>
> Dear all,
>
> I am willing to use OpenMPI on Windows for a CFD instead of MPICH2. My
> solver is developed if Fortran77 and piloted by a C++ interface; the both
> levels call MPI functions.
>
> So, I installed OpenMPI-1.6.2-x64 on my system and compiled my code
> successfully. But, at the runtime it crashed.
> I reproduced the problem into a small C application calling a Fortran
> function using MPI_Allreduce; when I removed some aggressive optimization
> options from the Fortran, it worked:
>
> Optimization: Disable (/Od)
>
> Inline Function Expansion: Any Suitable (/Ob2)
>
> Favor Size or Speed: Favor Fast Code (/Ot)
>
>
> So, I removed the same options from the Fortran parts of my solver, but it
> still crashes. I tried some others, but it still continues crashing. Does
> anybody has an idea? Should I (de)activate some compilation options? Is
> there some properties to build and link against libmpi_f77.lib?
>
> Thanks for your help.
> Mathieu.
>
> --
> Mathieu Gontier
> - MSN: mathieu.gontier_at_[hidden]
> - Skype: mathieu_gontier
>
>
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