Phil,
In previous versions of Open MPI, the Fortran bindings were calling
the related C MPI_* subroutine, that could be wrapped in C.
Now, Fortran bindings directly invoke the C PMPI_* subroutine, and
hence it cannot be wrapped in C.
The solution is to wrap C subroutines in C, and to wrap Fortran
subroutines in Fortran.
I assume darshan only wraps the C subroutines.
This point has recently been raised at
https://github.com/open-mpi/ompi/issues/3954, and so far, the
consensus
is that Open MPI is doing the right thing.
(for example, if you write wrappers for both C and Fortran, a given
subroutine invoked in Fortran is wrapped only once)
Cheers,
Gilles
On Sat, Aug 5, 2017 at 9:52 AM, Phil Carns wrote:
> Hi,
>
> What's the best way to access the PMPI profiling interface for Fortran
> applications built with mpifort (or one of the other Fortran compilers) from
> OpenMPI 2.1.1?
>
> In particular I am trying to test using Darshan via LD_PRELOAD. It works
> perfectly fine for C example programs (great!) but for Fortran programs it
> never triggers Darshan's MPI_Init() wrapper.
>
> Is there an extra step needed to get access to the correct symbols for
> profiling Fortran binaries?
>
> many thanks,
>
> -Phil
>
> ___
> devel mailing list
> devel@lists.open-mpi.org
> https://lists.open-mpi.org/mailman/listinfo/devel
___
devel mailing list
devel@lists.open-mpi.org
https://lists.open-mpi.org/mailman/listinfo/devel
