68 строки
2.3 KiB
Groff
68 строки
2.3 KiB
Groff
.\"Copyright 2006, Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
|
|
.\" Copyright (c) 1996 Thinking Machines Corporation
|
|
.TH MPI_Graph_map 3OpenMPI "September 2006" "Open MPI 1.2" " "
|
|
.SH NAME
|
|
\fBMPI_Graph_map \fP \- Maps process to graph topology information.
|
|
|
|
.SH SYNTAX
|
|
.ft R
|
|
.SH C Syntax
|
|
.nf
|
|
#include <mpi.h>
|
|
int MPI_Graph_map(MPI_Comm \fIcomm\fP, int\fI nnodes\fP, int\fI *index\fP,
|
|
int\fI *edges\fP, int\fI *newrank\fP)
|
|
|
|
.SH Fortran Syntax
|
|
.nf
|
|
INCLUDE 'mpif.h'
|
|
MPI_GRAPH_MAP(\fICOMM, NNODES, INDEX, EDGES, NEWRANK, IERROR\fP)
|
|
INTEGER \fICOMM, NNODES, INDEX(*), EDGES(*), NEWRANK, IERROR\fP
|
|
|
|
.SH C++ Syntax
|
|
.nf
|
|
#include <mpi.h>
|
|
int Graphcomm::Map(int \fInnodes\fP, const int \fIindex\fP[],
|
|
const int \fIedges\fP[]) const
|
|
|
|
.SH INPUT PARAMETERS
|
|
.ft R
|
|
.TP 1i
|
|
comm
|
|
Input communicator (handle).
|
|
.TP 1i
|
|
nnodes
|
|
Number of graph nodes (integer).
|
|
.TP 1i
|
|
index
|
|
Integer array specifying the graph structure, see MPI_Graph_ create.
|
|
.TP 1i
|
|
edges
|
|
Integer array specifying the graph structure.
|
|
|
|
.SH OUTPUT PARAMETERS
|
|
.ft R
|
|
.TP 1i
|
|
newrank
|
|
Reordered rank of the calling process; MPI_UNDEFINED if the calling process does not belong to graph (integer).
|
|
.ft R
|
|
.TP 1i
|
|
IERROR
|
|
Fortran only: Error status (integer).
|
|
|
|
.SH DESCRIPTION
|
|
.ft R
|
|
MPI_Cart_map and MPI_Graph_map can be used to implement all other topology
|
|
functions. In general they will not be called by the user directly, unless he or she is creating additional virtual topology capability other than that provided by MPI.
|
|
|
|
.SH 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++ functions 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.
|
|
.sp
|
|
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.
|
|
|
|
.SH SEE ALSO
|
|
.sp
|
|
MPI_Cart_map
|
|
|
|
' @(#)MPI_Graph_map.3 1.20 06/03/09
|