10-17-2016
So if there is faulty rank in middle. There will be address aliasing.
Who manages address aliasing, memory controller or os?
Dhaval
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LEARN ABOUT DEBIAN
mpi_group_range_incl
MPI_Group_range_incl(3) MPI MPI_Group_range_incl(3)
NAME
MPI_Group_range_incl - Creates a new group from ranges of ranks in an existing group
SYNOPSIS
int MPI_Group_range_incl(MPI_Group group, int n, int ranges[][3],
MPI_Group *newgroup)
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 ranks in group or processes to
be included in newgroup .
OUTPUT PARAMETER
newgroup
- new group derived from above, in the order defined by ranges (handle)
THREAD AND INTERRUPT SAFETY
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.
NOTES FOR FORTRAN
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.
ERRORS
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 guarentee that an MPI program can
continue past an error; however, MPI implementations will attempt to continue whenever possible.
MPI_SUCCESS
- No error; MPI routine completed successfully.
MPI_ERR_GROUP
- Null or invalid group passed to function.
MPI_ERR_INTERN
- This error is returned when some part of the MPICH implementation is unable to acquire memory.
MPI_ERR_ARG
- Invalid argument. Some argument is invalid and is not identified by a specific error class (e.g., MPI_ERR_RANK ).
MPI_ERR_RANK
- Invalid source or destination rank. Ranks must be between zero and the size of the communicator minus one; ranks in a receive (
MPI_Recv , MPI_Irecv , MPI_Sendrecv , etc.) may also be MPI_ANY_SOURCE .
SEE ALSO
MPI_Group_free
LOCATION
group_range_incl.c
11/6/2010 MPI_Group_range_incl(3)