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/*
* Copyright (c) 2018-2023 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2020 Bull S.A.S. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
/**
* @file
*
* This files contains all the hierarchical implementations of barrier
*/
#include "coll_han.h"
#include "ompi/mca/coll/base/coll_base_functions.h"
#include "ompi/mca/coll/base/coll_tags.h"
/**
* Short implementation of barrier that only does hierarchical
* communications without tasks.
*/
int
mca_coll_han_barrier_intra_simple(struct ompi_communicator_t *comm,
mca_coll_base_module_t *module)
{
mca_coll_han_module_t *han_module = (mca_coll_han_module_t *)module;
ompi_communicator_t *low_comm, *up_comm;
/* create the subcommunicators */
if( OMPI_SUCCESS != mca_coll_han_comm_create_new(comm, han_module) ) {
OPAL_OUTPUT_VERBOSE((30, mca_coll_han_component.han_output,
"han cannot handle barrier with this communicator. Fall back on another component\n"));
/* Put back the fallback collective support and call it once. All
* future calls will then be automatically redirected.
*/
HAN_LOAD_FALLBACK_COLLECTIVES(han_module, comm);
return han_module->previous_barrier(comm, han_module->previous_barrier_module);
}
low_comm = han_module->sub_comm[INTRA_NODE];
up_comm = han_module->sub_comm[INTER_NODE];
int low_rank = ompi_comm_rank(low_comm);
int root_low_rank = 0; /* rank leader will be 0 on each node */
/* TODO: extend coll interface with half barrier */
low_comm->c_coll->coll_barrier(low_comm,low_comm->c_coll->coll_barrier_module);
if (low_rank == root_low_rank) {
up_comm->c_coll->coll_barrier(up_comm, up_comm->c_coll->coll_barrier_module);
}
low_comm->c_coll->coll_barrier(low_comm,low_comm->c_coll->coll_barrier_module);
return OMPI_SUCCESS;
}
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