0bf06de3f1
This commit modifies ompi's process list group object to support a sentinel value for non-existant ompi_proc_t objects. The sentinel was chosen to be the negative of the opal_process_name_t of the associated ompi_proc_t. This takes advantage of the fact that on most (all?) systems the top bit of a user-space pointer is never set. If this changes then a new sentinel will be needed. In addition this commit modifies the way ompi_mpi_comm_world is initialized to fill in the group with sentinel values if the number of processes exceeds the new add_procs behavior cutoff. Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
51 строка
1.7 KiB
C
51 строка
1.7 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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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) 2004-2005 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) 2006-2007 University of Houston. All rights reserved.
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* Copyright (c) 2015 Los Alamos National Security, LLC. All rights
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* 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/group/group.h"
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#include "ompi/constants.h"
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/*
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* Set group rank in a group structure.
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*/
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void ompi_set_group_rank(ompi_group_t *group, struct ompi_proc_t *proc_pointer)
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{
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/* local variables */
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int proc;
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/* set the rank to MPI_UNDEFINED, just in case this process is not
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* in this group
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*/
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group->grp_my_rank = MPI_UNDEFINED;
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if (NULL != proc_pointer) {
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/* loop over all procs in the group */
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for (proc = 0; proc < group->grp_proc_count; proc++) {
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/* check and see if this proc pointer matches proc_pointer
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*/
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if (ompi_group_peer_lookup_existing (group, proc) == proc_pointer) {
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group->grp_my_rank = proc;
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break;
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}
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} /* end proc loop */
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}
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}
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