+++ /dev/null
-/* Copyright (c) 2013-2014. The SimGrid Team.
- * All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include "colls_private.h"
-
-int flattree_segment_in_byte = 8192;
-
-int
-smpi_coll_tuned_bcast_flattree_pipeline(void *buff, int count,
- MPI_Datatype data_type, int root,
- MPI_Comm comm)
-{
- int i, j, rank, num_procs;
- int tag = COLL_TAG_BCAST;
-
- MPI_Aint extent;
- extent = data_type->get_extent();
-
- int segment = flattree_segment_in_byte / extent;
- segment = segment == 0 ? 1 :segment;
- int pipe_length = count / segment;
- int increment = segment * extent;
- if (pipe_length==0) {
- XBT_WARN("MPI_bcast_flattree_pipeline use default MPI_bcast_flattree.");
- return smpi_coll_tuned_bcast_flattree(buff, count, data_type, root, comm);
- }
- rank = comm->rank();
- num_procs = comm->size();
-
- MPI_Request *request_array;
- MPI_Status *status_array;
-
- request_array = (MPI_Request *) xbt_malloc(pipe_length * sizeof(MPI_Request));
- status_array = (MPI_Status *) xbt_malloc(pipe_length * sizeof(MPI_Status));
-
- if (rank != root) {
- for (i = 0; i < pipe_length; i++) {
- request_array[i] = Request::irecv((char *)buff + (i * increment), segment, data_type, root, tag, comm);
- }
- Request::waitall(pipe_length, request_array, status_array);
- }
-
- else {
- // Root sends data to all others
- for (j = 0; j < num_procs; j++) {
- if (j == rank)
- continue;
- else {
- for (i = 0; i < pipe_length; i++) {
- Request::send((char *)buff + (i * increment), segment, data_type, j, tag, comm);
- }
- }
- }
-
- }
-
- free(request_array);
- free(status_array);
- return MPI_SUCCESS;
-}