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NAME
MPI_Group_incl - Produces a group by reordering an existing group and
taking only listed members.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Group_incl(MPI_Group group, int n, int *ranks,
MPI_Group *newgroup)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_GROUP_INCL(GROUP, N, RANKS, NEWGROUP, IERROR)
INTEGER GROUP, N, RANKS(*), NEWGROUP, IERROR
C++ Syntax
#include <mpi.h>
Group Group::Incl(int n, const int ranks[]) const
INPUT PARAMETERS
group Group (handle).
n Number of elements in array ranks (and size of new-
group)(integer).
ranks Ranks of processes in group to appear in newgroup (array of
integers).
OUTPUT PARAMETERS
newgroup New group derived from above, in the order defined by ranks
(handle).
IERROR Fortran only: Error status (integer).
DESCRIPTION
The function MPI_Group_incl creates a group group_out that consists of
the n processes in group with ranks rank[0], ..., rank[n-1]; the
process with rank i in group_out is the process with rank ranks[i] in
group. Each of the n elements of ranks must be a valid rank in group
and all elements must be distinct, or else the program is erroneous. If
n = 0, then group_out is MPI_GROUP_EMPTY. This function can, for
instance, be used to reorder the elements of a group.
NOTE
This implementation does not currently check to ensure that there are
no duplicates in the list of ranks.
ERRORS
Almost all MPI routines return an error value; C routines as the value
of the function and Fortran routines in the last argument. C++ func-
may be used to cause error values to be returned. Note that MPI does
not guarantee that an MPI program can continue past an error.
SEE ALSO
MPI_Group_compare
MPI_Group_range_incl
MPI_Group_free
Open MPI 1.2 September 2006 MPI_Group_incl(3OpenMPI)
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