Gathers data from all processes to one
Data length All data (msg) is equal-sized
MPI mapping mpi_gather
see mp_gather_l
Type | Intent | Optional | Attributes | Name | ||
---|---|---|---|---|---|---|
integer(kind=int_8), | intent(in), | CONTIGUOUS | :: | msg(:) |
Datum to send to root |
|
integer(kind=int_8), | intent(out), | CONTIGUOUS | :: | msg_gather(:) | ||
integer, | intent(in) | :: | root | |||
integer, | intent(in) | :: | gid |
SUBROUTINE mp_gather_lv(msg, msg_gather, root, gid)
!! Gathers data from all processes to one
!!
!! Data length
!! All data (msg) is equal-sized
!!
!! MPI mapping
!! mpi_gather
!! @note see mp_gather_l
INTEGER(KIND=int_8), CONTIGUOUS, INTENT(IN) :: msg(:)
!! Datum to send to root
INTEGER(KIND=int_8), CONTIGUOUS, INTENT(OUT) :: msg_gather(:)
INTEGER, INTENT(IN) :: root, gid
CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_gather_lv'
INTEGER :: handle, ierr, msglen
ierr = 0
CALL timeset(routineN, handle)
msglen = SIZE(msg)
#if defined(__parallel)
CALL mpi_gather(msg, msglen, MPI_INTEGER8, msg_gather, &
msglen, MPI_INTEGER8, root, gid, ierr)
IF (ierr /= 0) CALL mp_stop(ierr, "mpi_gather @ "//routineN)
CALL add_perf(perf_id=4, msg_size=msglen*int_8_size)
#else
MARK_USED(root)
MARK_USED(gid)
msg_gather = msg
#endif
CALL timestop(handle)
END SUBROUTINE mp_gather_lv