59 строки
2.0 KiB
C
59 строки
2.0 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2013 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2009 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2012-2013 Inria. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "ompi_config.h"
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#include "ompi/mca/topo/example/topo_example.h"
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#include "ompi/communicator/communicator.h"
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/*
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* function - mca_topo_example_graph_map
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*
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* @param comm input communicator (handle)
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* @param nnodes number of graph nodes (integer)
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* @param index integer array specifying the graph structure
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* @param edges integer array specifying the graph structure
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* @param newrank reordered rank of the calling process; 'MPI_UNDEFINED'
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* if the calling process does not belong to
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* graph (integer)
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*
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* @retval MPI_SUCCESS
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* @retval MPI_UNDEFINED
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*/
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int mca_topo_example_graph_map (ompi_communicator_t* comm,
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int nnodes,
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int *index,
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int *edges,
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int *newrank)
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{
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int myrank;
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/*
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* Compute my new rank. To be slightly different than the "unity"
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* component, start with a rank that is size-my_initial_rank.
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*/
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myrank = ompi_comm_size(comm) - 1 - ompi_comm_rank(comm);
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*newrank =
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((0 > myrank) || (myrank >= nnodes)) ? MPI_UNDEFINED : myrank;
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return OMPI_SUCCESS;
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}
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