59cc09fd1a
This commit was SVN r13456. The following Trac tickets were found above: Ticket 850 --> https://svn.open-mpi.org/trac/ompi/ticket/850
74 строки
2.4 KiB
Groff
74 строки
2.4 KiB
Groff
.\"Copyright 2006, Sun Microsystems, Inc.
|
|
.\" Copyright (c) 1996 Thinking Machines Corporation
|
|
.TH MPI_Graph_get 3OpenMPI "September 2006" "Open MPI 1.2" " "
|
|
.SH NAME
|
|
\fBMPI_Graph_get \fP \- Retrieves graph topology information associated with a communicator.
|
|
|
|
.SH SYNTAX
|
|
.ft R
|
|
.SH C Syntax
|
|
.nf
|
|
#include <mpi.h>
|
|
int MPI_Graph_get(MPI_Comm \fIcomm\fP, int\fI maxindex\fP, int\fI maxedges\fP,
|
|
int\fI *index\fP, int\fI *edges\fP)
|
|
|
|
.SH Fortran Syntax
|
|
.nf
|
|
INCLUDE 'mpif.h'
|
|
MPI_GRAPH_GET(\fICOMM, MAXINDEX, MAXEDGES, INDEX, EDGES, IERROR\fP)
|
|
INTEGER \fICOMM, MAXINDEX, MAXEDGES, INDEX(*)\fP
|
|
INTEGER \fIEDGES(*), IERROR\fP
|
|
|
|
.SH C++ Syntax
|
|
.nf
|
|
#include <mpi.h>
|
|
void Graphcomm::Get_topo(int \fImaxindex\fP, int \fImaxedges\fP,
|
|
int \fIindex\fP[], int \fIedges\fP[]) const
|
|
|
|
.SH INPUT PARAMETERS
|
|
.ft R
|
|
.TP 1i
|
|
comm
|
|
Communicator with graph structure (handle).
|
|
.TP 1i
|
|
maxindex
|
|
Length of vector index in the calling program (integer).
|
|
.TP 1i
|
|
maxedges
|
|
Length of vector edges in the calling program (integer).
|
|
|
|
.SH OUTPUT PARAMETERS
|
|
.ft R
|
|
.TP 1i
|
|
index
|
|
Array of integers containing the graph structure (for details see the
|
|
definition of MPI_Graph_create).
|
|
.TP 1i
|
|
edges
|
|
Array of integers containing the graph structure.
|
|
.ft R
|
|
.TP 1i
|
|
IERROR
|
|
Fortran only: Error status (integer).
|
|
|
|
.SH DESCRIPTION
|
|
.ft R
|
|
Functions MPI_Graphdims_get and MPI_Graph_get retrieve the graph-topology information that was associated with a communicator by MPI_Graph_create.
|
|
.sp
|
|
The information provided by MPI_Graphdims_get can be used to dimension the vectors index and edges correctly for a call to MPI_Graph_get.
|
|
|
|
.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
|
|
.ft R
|
|
.sp
|
|
MPI_Graph_create
|
|
.br
|
|
MPI_Graphdims_get
|
|
|
|
' @(#)MPI_Graph_get.3 1.20 06/03/09
|