mp_min_rv Subroutine

      SUBROUTINE mp_min_rv(msg, gid)
      !! Finds the element-wise minimum of vector with the result left on
      !! all processes.
      !!
      !! MPI mapping
      !! mpi_allreduce
      !! @note see mp_min_r

         REAL(kind=real_4), CONTIGUOUS, INTENT(INOUT)     :: msg(:)
         !! Find minimum among these data (input) and maximum (output)
         TYPE(mp_comm_type), INTENT(IN)                      :: gid

         CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_min_rv'

         INTEGER                                  :: handle, ierr, msglen

         ierr = 0
         CALL timeset(routineN, handle)

         msglen = SIZE(msg)
#if defined(__parallel)
         CALL mpi_allreduce(MPI_IN_PLACE, msg, msglen, MPI_REAL, MPI_MIN, gid%handle, ierr)
         IF (ierr /= 0) CALL mp_stop(ierr, "mpi_allreduce @ "//routineN)
         CALL add_perf(perf_id=3, msg_size=msglen*real_4_size)
#else
         MARK_USED(gid)
#endif
         CALL timestop(handle)
      END SUBROUTINE mp_min_rv