All, I have a Fortran code that works quite well with OpenMPI 1.4.3 where I create a handle using:
call MPI_TYPE_CREATE_F90_INTEGER(9, COMM_INT4, ierror) and then do a reduction with: call MPI_ALLREDUCE(send_buffer, buffer, count, COMM_INT4, MPI_SUM, communicator, ierror) However, this fails with OpenMPI 1.6.3 stating: An error occurred in MPI_Allreduce: the reduction operation MPI_SUM is not defined for non-intrinsic datatypes (attempted with datatype named "Dup MPI_INT") The MPI standard states that MPI_SUM works with Fortran integers, and Fortran integers are defined in Section 5.9.2 as: MPI_INTEGER, MPI_AINT, MPI_OFFSET, *and handles returned from MPI_TYPE_CREATE_F90_INTEGER*, and if available: MPI_INTEGER1, MPI_INTEGER2, MPI_INTEGER4, MPI_INTEGER8, MPI_INTEGER16 (emphasis mine) However the manual page on MPI_Reduce for OpenMPI only states that Fortran integers are: Fortran integer: MPI_INTEGER Does OpenMPI not support using MPI_SUM with Fortran integer handles? I'm hoping that it's just an oversight as it used to work... System: Fedora 17 Compilers: GCC 4.7.2 OpenMPI's tested: 1.4.3 (works), 1.5.4 (doesn't work), 1.6.3 (doesn't work) Thanks for any insight, Shane
