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 <ca...@mcs.anl.gov> 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
