MPI_Get_processor_name(3) MPI MPI_Get_processor_name(3)
NAME
MPI_Get_processor_name - Gets the name of the processor
SYNOPSIS
int MPI_Get_processor_name( char *name, int *resultlen )
OUTPUT PARAMETERS
name - A unique specifier for the actual (as opposed to virtual) node. This must be an array of size at least MPI_MAX_PROCESSOR_NAME .
resultlen
- Length (in characters) of the name
NOTES
The name returned should identify a particular piece of hardware; the exact format is implementation defined. This name may or may not be
the same as might be returned by gethostname , uname , or sysinfo .
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.
In Fortran, the character argument should be declared as a character string of MPI_MAX_PROCESSOR_NAME rather than an array of dimension
MPI_MAX_PROCESSOR_NAME . That is,
character*(MPI_MAX_PROCESSOR_NAME) name
rather than
character name(MPI_MAX_PROCESSOR_NAME)
The two
The sizes of MPI strings in Fortran are one less than the sizes of that string in C/C++ because the C/C++ versions provide room for the
trailing null character required by C/C++. For example, MPI_MAX_ERROR_STRING is mpif.h is one smaller than the same value in mpi.h . See
the MPI-2 standard, sections 2.6.2 and 4.12.9.
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.
LOCATION
getpname.c
11/6/2008 MPI_Get_processor_name(3)