Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

mpi_intercomm_merge(3openmpi) [osx man page]

MPI_Intercomm_merge(3OpenMPI)											     MPI_Intercomm_merge(3OpenMPI)

NAME
MPI_Intercomm_merge - Creates an intracommunicator from an intercommunicator. SYNTAX
C Syntax #include <mpi.h> int MPI_Intercomm_merge(MPI_Comm intercomm, int high, MPI_Comm *newintracomm Fortran Syntax INCLUDE 'mpif.h' MPI_INTERCOMM_MERGE(INTERCOMM, HIGH, NEWINTRACOMM, IERROR) INTEGER INTERCOMM, NEWINTRACOMM, IERROR LOGICAL HIGH C++ Syntax #include <mpi.h> Intracomm Intercomm::Merge(bool high) const INPUT PARAMETERS
intercomm Intercommunicator (type indicator). high Used to order the groups of the two intracommunicators within comm when creating the new communicator (type indicator). OUTPUT PARAMETERS
newintracomm Created intracommunicator (type indicator). IERROR Fortran only: Error status (integer). DESCRIPTION
This function creates an intracommunicator from the union of the two groups that are associated with intercomm. All processes should pro- vide the same high value within each of the two groups. If processes in one group provide the value high = false and processes in the other group provide the value high = true, then the union orders the "low" group before the "high" group. If all processes provide the same high argument, then the order of the union is arbitrary. This call is blocking and collective within the union of the two groups. 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_Intercomm_create MPI_Comm_free Open MPI 1.2 September 2006 MPI_Intercomm_merge(3OpenMPI)

Check Out this Related Man Page

MPI_Errhandler_get(3OpenMPI)											      MPI_Errhandler_get(3OpenMPI)

NAME
MPI_Errhandler_get - Gets the error handler for a communicator -- use of this routine is deprecated. SYNTAX
C Syntax #include <mpi.h> int MPI_Errhandler_get(MPI_Comm comm, MPI_Errhandler *errhandler) Fortran Syntax INCLUDE 'mpif.h' MPI_ERRHANDLER_GET(COMM, ERRHANDLER, IERROR) INTEGER COMM, ERRHANDLER, IERROR INPUT PARAMETER
comm Communicator to get the error handler from (handle). OUTPUT PARAMETERS
errhandler MPI error handler currently associated with communicator (handle). IERROR Fortran only: Error status (integer). DESCRIPTION
Note that use of this routine is deprecated as of MPI-2. Please use MPI_Comm_get_errhandler instead. This deprecated routine is not available in C++. Returns in errhandler (a handle to) the error handler that is currently associated with communicator comm. Example: A library function may register at its entry point the current error handler for a communicator, set its own private error handler for this communicator, and restore before exiting the previous error handler. 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_Comm_create_errhandler MPI_Comm_get_errhandler MPI_Comm_set_errhandler Open MPI 1.2 September 2006 MPI_Errhandler_get(3OpenMPI)
Man Page