MPIX_Comm_revoke(3) Manual Page

This function notifies all MPI processes in the groups (local and remote) associated with the communicator comm that this communicator is revoked. The revocation of a communicator by any MPI process completes non-local MPI operations on comm at all MPI processes by raising an error of class MPI_ERR_REVOKED (with the exception of MPIX_Comm_shrink, MPIX_Comm_agree). This function is not collective and therefore does not have a matching call on remote MPI processes. All non-failed MPI processes belonging to comm will be notified of the revocation despite failures.

A communicator is revoked at a given MPI process either when MPIX_Comm_revoke is locally called on it, or when any MPI operation on comm raises an error of class MPI_ERR_REVOKED at that process. Once a communicator has been revoked at an MPI process, all subsequent non-local operations on that communicator (with thesame exceptions as above), are considered local and must complete by raising an error of class MPI_ERR_REVOKED at that MPI process.

This routine is part of the MPIX extension to the MPI standard. It may become part of the standard in the future, in which its signature will change to the MPI prefix.

This routine is thread-safe. This means that this routine may be safely used by multiple threads without the need for any user-provided thread locks. However, the routine is not interrupt safe. Typically, this is due to the use of memory allocation routines such as 'malloc' or other non-MPICH runtime routines that are themselves not interrupt-safe.

All MPI routines in Fortran (except for 'MPI_WTIME' and 'MPI_WTICK') have an additional argument 'ierr' at the end of the argument list. 'ierr' is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the 'call' statement.

All MPI objects (e.g., 'MPI_Datatype', 'MPI_Comm') are of type 'INTEGER' in Fortran.

All MPI routines (except 'MPI_Wtime' and 'MPI_Wtick') return an error value; C routines as the value of the function and Fortran routines in the last argument. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with 'MPI_Comm_set_errhandler' (for communicators), 'MPI_File_set_errhandler' (for files), and 'MPI_Win_set_errhandler' (for RMA windows). The MPI-1 routine 'MPI_Errhandler_set' may be used but its use is deprecated. 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; however, MPI implementations will attempt to continue whenever possible.