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MPI_Group_compare.3.rst

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MPI_Group_compare

:ref:`MPI_Group_compare` |mdash| Compares two groups.

SYNTAX

C Syntax

#include <mpi.h>

int MPI_Group_compare(MPI_Group group1, MPI_Group group2,
    int *result)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'

MPI_GROUP_COMPARE(GROUP1, GROUP2, RESULT, IERROR)
    INTEGER GROUP1, GROUP2, RESULT, IERROR

Fortran 2008 Syntax

USE mpi_f08

MPI_Group_compare(group1, group2, result, ierror)
    TYPE(MPI_Group), INTENT(IN) :: group1, group2
    INTEGER, INTENT(OUT) :: result
    INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT PARAMETERS

  • group1 : First group (handle).
  • group2 : Second group (handle).

OUTPUT PARAMETERS

  • result : Integer which is MPI_IDENT if the order and members of
    the two groups are the same, MPI_SIMILAR if only the members are the same, and MPI_UNEQUAL otherwise.
  • ierror : Fortran only: Error status (integer).

DESCRIPTION

MPI_IDENT results if the group members and group order is exactly the same in both groups. This happens for instance if group1 and group2 are the same handle. MPI_SIMILAR results if the group members are the same but the order is different. MPI_UNEQUAL results otherwise.

ERRORS