sum_reduce_real_3array Subroutine

  1. mp.fpp
  2. mp
  3. sum_reduce_real_3array

private subroutine sum_reduce_real_3array(a, dest)

FIXME : Add documentation

Arguments

Type IntentOptional Attributes Name
real, intent(inout), dimension (:,:,:) :: a
integer, intent(in) :: dest

Contents

Source Code

sum_reduce_real_3array

Source Code

  subroutine sum_reduce_real_3array (a, dest)
    implicit none
    real, dimension (:,:,:), intent (in out) :: a
    integer, intent (in) :: dest
# ifdef MPI
    integer :: ierror
!$OMP MASTER
    call time_message(.false., time_mp_collectives, ' MPI Collectives')
!$OMP END MASTER
    if(iproc.eq.dest)then
       call mpi_reduce &
         (MPI_IN_PLACE, a, size(a), mpireal, MPI_SUM, dest, mp_comm, ierror)
    else
       call mpi_reduce &
         (a, a, size(a), mpireal, MPI_SUM, dest, mp_comm, ierror)
    endif
!$OMP MASTER
    call time_message(.false., time_mp_collectives, ' MPI Collectives')
!$OMP END MASTER
# else
    UNUSED_DUMMY(a)
    if (dest /= 0) call mp_abort ("reduce to")
# endif
  end subroutine sum_reduce_real_3array