mp_iallgather_l22 Subroutine

      SUBROUTINE mp_iallgather_l22(msgout, msgin, gid, request)
      !! Gathers rank-2 data from all processes and all processes receive the
      !! same data
      !! @note see mp_allgather_l12

         INTEGER(KIND=int_8), CONTIGUOUS, INTENT(IN)        :: msgout(:, :)
         !! Rank-2 data to send
         INTEGER(KIND=int_8), CONTIGUOUS, INTENT(OUT)       :: msgin(:, :)
         INTEGER, INTENT(IN)                      :: gid
         INTEGER, INTENT(OUT)                     :: request

         CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_iallgather_l22'

         INTEGER                                  :: handle, ierr
#if defined(__parallel)
         INTEGER                                  :: rcount, scount
#endif

         ierr = 0
         CALL timeset(routineN, handle)

#if defined(__parallel)
         scount = SIZE(msgout(:, :))
         rcount = scount
         CALL MPI_IALLGATHER(msgout, scount, MPI_INTEGER8, &
                             msgin, rcount, MPI_INTEGER8, &
                             gid, request, ierr)
         IF (ierr /= 0) CALL mp_stop(ierr, "mpi_iallgather @ "//routineN)
#else
         MARK_USED(gid)
         msgin(:, :) = msgout(:, :)
         request = mp_request_null
#endif
         CALL timestop(handle)
      END SUBROUTINE mp_iallgather_l22