mp_ibcast_l Subroutine

private subroutine mp_ibcast_l(msg, source, gid, request)

Broadcasts a datum to all processes.

MPI mapping mpi_bcast

Arguments

TypeIntentOptionalAttributesName
integer(kind=int_8) :: msg

Datum to broadcast

integer :: source

Processes which broadcasts Message passing environment identifier

integer :: gid

Processes which broadcasts Message passing environment identifier

integer, intent(inout) :: request

Contents

Source Code


Source Code

      SUBROUTINE mp_ibcast_l (msg, source, gid, request)
      !! Broadcasts a datum to all processes.
      !!
      !! MPI mapping
      !! mpi_bcast

         INTEGER(KIND=int_8)                                :: msg
         !! Datum to broadcast
         INTEGER                                  :: source, gid
         !! Processes which broadcasts
         !! Message passing environment identifier
         INTEGER, INTENT(INOUT)                   :: request

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

         INTEGER                                  :: handle, ierr, msglen

         ierr = 0
         CALL timeset(routineN, handle)

         msglen = 1
#if defined(__parallel)
#if __MPI_VERSION > 2
         CALL mpi_ibcast(msg, msglen, MPI_INTEGER8, source, gid, request, ierr)
         IF (ierr /= 0) CALL mp_stop(ierr, "mpi_ibcast @ "//routineN)
         CALL add_perf(perf_id=22, msg_size=msglen*int_8_size)
#else
         MARK_USED(msg)
         MARK_USED(source)
         MARK_USED(gid)
         request = mp_request_null
         DBCSR_ABORT("mp_ibcast requires MPI-3 standard")
#endif
#else
         MARK_USED(msg)
         MARK_USED(source)
         MARK_USED(gid)
         request = mp_request_null
#endif
         CALL timestop(handle)
      END SUBROUTINE mp_ibcast_l