MPI_Group_range_excl(3) Open MPI MPI_Group_range_excl(3)NAMEMPI_Group_range_excl - Produces a group by excluding ranges of pro‐
cesses from an existing group.
SYNTAXC Syntax
#include <mpi.h>
int MPI_Group_range_excl(MPI_Group group, int n, int ranges[][3],
MPI_Group *newgroup)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_GROUP_RANGE_EXCL(GROUP, N, RANGES, NEWGROUP, IERROR)
INTEGER GROUP, N, RANGES(3,*), NEWGROUP, IERROR
C++ Syntax
#include <mpi.h>
Group Group::Range_excl(int n, const int ranges[][3]) const
INPUT PARAMETERS
group Group (handle).
n Number of triplets in array ranges (integer).
ranges A one-dimensional array of integer triplets of the form
(first rank, last rank, stride), indicating the ranks in
group of processes to be excluded from the output group new‐
group.
OUTPUT PARAMETERS
newgroup New group derived from above, preserving the order in group
(handle).
IERROR Fortran only: Error status (integer).
DESCRIPTION
Each computed rank must be a valid rank in group and all computed ranks
must be distinct, or else the program is erroneous.
The functionality of this routine is specified to be equivalent to
expanding the array of ranges to an array of the excluded ranks and
passing the resulting array of ranks and other arguments to
MPI_Group_excl. A call to MPI_Group_excl is equivalent to a call to
MPI_Group_range_excl with each rank i in ranks replaced by the triplet
(i,i,1) in the argument ranges.
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‐
tions do not return errors. If the default error handler is set to
MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI::Exception object.
Before the error value is returned, the current MPI error handler is
called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with
MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN
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_excl
MPI_Group_free
1.7.4 Feb 04, 2014 MPI_Group_range_excl(3)
