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<TITLE>MPI_Get_processor_name</TITLE>
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MPI_Get_processor_name
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Gets the name of the processor
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Synopsis
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int MPI_Get_processor_name( char *name, int *resultlen )
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Output Parameters
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name A unique specifier for the actual (as opposed to virtual) node. This
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must be an array of size at least <tt>MPI_MAX_PROCESSOR_NAME</tt>.
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resultlen Length (in characters) of the name
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Notes
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The name returned should identify a particular piece of hardware;
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the exact format is implementation defined. This name may or may not
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be the same as might be returned by <tt>gethostname</tt>, <tt>uname</tt>, or <tt>sysinfo</tt>.
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Thread and Interrupt Safety
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This routine is thread-safe. This means that this routine may be
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safely used by multiple threads without the need for any user-provided
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thread locks. However, the routine is not interrupt safe. Typically,
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this is due to the use of memory allocation routines such as <tt>malloc
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</tt>or other non-MPICH runtime routines that are themselves not interrupt-safe.
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Notes for Fortran
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All MPI routines in Fortran (except for <tt>MPI_WTIME</tt> and <tt>MPI_WTICK</tt>) have
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an additional argument <tt>ierr</tt> at the end of the argument list. <tt>ierr
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</tt>is an integer and has the same meaning as the return value of the routine
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in C. In Fortran, MPI routines are subroutines, and are invoked with the
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<tt>call</tt> statement.
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All MPI objects (e.g., <tt>MPI_Datatype</tt>, <tt>MPI_Comm</tt>) are of type <tt>INTEGER
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</tt>in Fortran.
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In Fortran, the character argument should be declared as a character string
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of <tt>MPI_MAX_PROCESSOR_NAME</tt> rather than an array of dimension
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<tt>MPI_MAX_PROCESSOR_NAME</tt>. That is,
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character*(MPI_MAX_PROCESSOR_NAME) name
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rather than
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character name(MPI_MAX_PROCESSOR_NAME)
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The two
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The sizes of MPI strings in Fortran are one less than the sizes of that
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string in C/C++ because the C/C++ versions provide room for the trailing
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null character required by C/C++. For example, <tt>MPI_MAX_ERROR_STRING</tt> is
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<tt>mpif.h</tt> is one smaller than the same value in <tt>mpi.h</tt>. See the MPI
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standard, sections 2.6.2 and 4.12.9.
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Errors
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All MPI routines (except <tt>MPI_Wtime</tt> and <tt>MPI_Wtick</tt>) return an error value;
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C routines as the value of the function and Fortran routines in the last
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argument. Before the value is returned, the current MPI error handler is
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called. By default, this error handler aborts the MPI job. The error handler
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may be changed with <tt>MPI_Comm_set_errhandler</tt> (for communicators),
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<tt>MPI_File_set_errhandler</tt> (for files), and <tt>MPI_Win_set_errhandler</tt> (for
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RMA windows). The MPI-1 routine <tt>MPI_Errhandler_set</tt> may be used but
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its use is deprecated. The predefined error handler
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<tt>MPI_ERRORS_RETURN</tt> may be used to cause error values to be returned.
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Note that MPI does not guarentee that an MPI program can continue past
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an error; however, MPI implementations will attempt to continue whenever
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possible.
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- MPI_SUCCESS
- No error; MPI routine completed successfully.
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