Folks, I ran some basic tests with IPM profiler-like https://github.com/nerscadmin/IPM and found that when fortran calls an mpi subroutine, this is accounted twice. IPM defines both MPI_* subroutines and their fortran mpi_*_ counterpart. since the ompi fortran calls the MPI_* symbol (and not the PMPI_* one), and IPM does nothing to prevent double accounting, all subroutines are accounted twice
what is the rationale for calling MPI_* from fortran instead of PMPI_* ? basically, I can see three options 1. we do nothing, this is an IPM problem, not an Open MPI one 2. we change ompi to call the PMPI_* symbols 3. we add a configure option to call PMPI_* symbols instead of the MPI_* ones any thoughts ? Cheers, Gilles
