sum_allreduce_real Subroutine

  1. mp.fpp
  2. mp
  3. sum_allreduce_real

private subroutine sum_allreduce_real(a)

FIXME : Add documentation

Arguments

Type IntentOptional Attributes Name
real, intent(inout) :: a

Contents

Source Code

sum_allreduce_real

Source Code

  subroutine sum_allreduce_real (a)
    implicit none
    real, intent (in out) :: a
# ifdef MPI
    integer :: ierror
!$OMP MASTER
    call time_message(.false., time_mp_collectives, ' MPI Collectives')
!$OMP END MASTER
    call mpi_allreduce &
         (MPI_IN_PLACE, a, 1, mpireal, MPI_SUM, mp_comm, ierror)
!$OMP MASTER
    call time_message(.false., time_mp_collectives, ' MPI Collectives')
!$OMP END MASTER
# else
    UNUSED_DUMMY(a)
# endif
  end subroutine sum_allreduce_real