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Subject: Re: [OMPI users] OpenMPI on Windows when MPI_F77 is used from a C application
From: Mathieu Gontier (mathieu.gontier_at_[hidden])
Date: 2012-10-29 16:30:50


Hi guys.

Finally, I compiled with /O: the options is deprecated and, like I did
previously, I used /Od instead... unsuccessfully.

I also compiled my code from a script in order to call mpicc.exe /
mpiCC.exe / mpif77.exe instead of directly calling cl.exe and ifort.exe.
Only the linkage is done without mpicc.exe because I did not found how to
call the linker from mpicc.exe (if it can change something, just let me
know). So, the purpose is to compile with the default OpenMPI options (if
there is any). But my solver still crashes.

So, if anybody has an idea...

Thanks for your help.

On Mon, Oct 29, 2012 at 7:33 PM, Mathieu Gontier
<mathieu.gontier_at_[hidden]>wrote:

> I crashes into the fortran routine calling a MPI functions. When I run the
> debugger, the crash seems to be in libmpi_f77.lib, but I cannot go further
> since the lib is not in debbug mode.
>
> Attached to this email the files of my small case. But with
> less aggressive options, it works.
>
> I did not know the lowst optimization level is /O: I am going to try.
>
>
> On Mon, Oct 29, 2012 at 5:08 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
>>
>>
>> _______________________________________________
>> users mailing listusers_at_[hidden]http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>>
>>
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>
>
>
> --
> Mathieu Gontier
> - MSN: mathieu.gontier_at_[hidden]
> - Skype: mathieu_gontier
>

-- 
Mathieu Gontier
- MSN: mathieu.gontier_at_[hidden]
- Skype: mathieu_gontier