Gathers a datum from all processes and all processes receive the same data
Data size All processes send equal-sized data
MPI mapping mpi_allgather
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
real(kind=real_4), | intent(in) | :: | msgout |
Datum to send |
||
real(kind=real_4), | intent(out), | CONTIGUOUS | :: | msgin(:,:) |
Received data |
|
integer, | intent(in) | :: | gid |
Message passing environment identifier |
SUBROUTINE mp_allgather_r2(msgout, msgin, gid)
!! Gathers a datum from all processes and all processes receive the
!! same data
!!
!! Data size
!! All processes send equal-sized data
!!
!! MPI mapping
!! mpi_allgather
REAL(kind=real_4), INTENT(IN) :: msgout
!! Datum to send
REAL(kind=real_4), CONTIGUOUS, INTENT(OUT) :: msgin(:, :)
!! Received data
INTEGER, INTENT(IN) :: gid
!! Message passing environment identifier
CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_allgather_r2'
INTEGER :: handle, ierr
#if defined(__parallel)
INTEGER :: rcount, scount
#endif
ierr = 0
CALL timeset(routineN, handle)
#if defined(__parallel)
scount = 1
rcount = 1
CALL MPI_ALLGATHER(msgout, scount, MPI_REAL, &
msgin, rcount, MPI_REAL, &
gid, ierr)
IF (ierr /= 0) CALL mp_stop(ierr, "mpi_allgather @ "//routineN)
#else
MARK_USED(gid)
msgin = msgout
#endif
CALL timestop(handle)
END SUBROUTINE mp_allgather_r2