MPI_Group_translate_ranks(3) Open MPI MPI_Group_translate_ranks(3)NAMEMPI_Group_translate_ranks - Translates the ranks of processes in one
group to those in another group.
SYNTAXC Syntax
#include <mpi.h>
int MPI_Group_translate_ranks(MPI_Group group1, int n,
const int ranks1[], MPI_Group group2, int ranks2[])
Fortran Syntax
INCLUDE 'mpif.h'
MPI_GROUP_TRANSLATE_RANKS(GROUP1, N, RANKS1, GROUP2, RANKS2,
IERROR)
INTEGER GROUP1, N, RANKS1(*), GROUP2, RANKS2(*), IERROR
C++ Syntax
#include <mpi.h>
static void Group::Translate_ranks (const Group& group1, int n,
const int ranks1[], const Group& group2, int ranks2[])
INPUT PARAMETERS
group1 First group (handle).
n Number of ranks in ranks1 and ranks2 arrays (integer).
ranks1 Array of zero or more valid ranks in group1.
group2 Second group (handle).
OUTPUT PARAMETERS
ranks2 Array of corresponding ranks in group2, MPI_UNDEFINED when no
correspondence exists.
IERROR Fortran only: Error status (integer).
DESCRIPTION
This function is important for determining the relative numbering of
the same processes in two different groups. For instance, if one knows
the ranks of certain processes in the group of MPI_COMM_WORLD, one
might want to know their ranks in a subset of that group.
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.
1.7.4 Feb 04, 2014 MPI_Group_translate_ranks(3)
