+++ /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"
-
-/*****************************************************************************
-
-Copyright (c) 2006, Ahmad Faraj & Xin Yuan,
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
-
- * Neither the name of the Florida State University nor the names of its
- contributors may be used to endorse or promote products derived from this
- software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- *************************************************************************
- * Any results obtained from executing this software require the *
- * acknowledgment and citation of the software and its owners. *
- * The full citation is given below: *
- * *
- * A. Faraj and X. Yuan. "Automatic Generation and Tuning of MPI *
- * Collective Communication Routines." The 19th ACM International *
- * Conference on Supercomputing (ICS), Cambridge, Massachusetts, *
- * June 20-22, 2005. *
- *************************************************************************
-
-*****************************************************************************/
-
-/*****************************************************************************
-
- * Function: bcast_binomial_tree
-
- * Return: int
-
- * Inputs:
- buff: send input buffer
- count: number of elements to send
- data_type: data type of elements being sent
- root: source of data
- comm: communicator
-
- * Descrp: broadcasts using a bionomial tree.
-
- * Auther: MPIH / modified by Ahmad Faraj
-
- ****************************************************************************/
-
-int
-smpi_coll_tuned_bcast_binomial_tree(void *buff, int count,
- MPI_Datatype data_type, int root,
- MPI_Comm comm)
-{
- int src, dst, rank, num_procs, mask, relative_rank;
- int tag = COLL_TAG_BCAST;
-
- rank = comm->rank();
- num_procs = comm->size();
-
- relative_rank = (rank >= root) ? rank - root : rank - root + num_procs;
-
- mask = 0x1;
- while (mask < num_procs) {
- if (relative_rank & mask) {
- src = rank - mask;
- if (src < 0)
- src += num_procs;
- Request::recv(buff, count, data_type, src, tag, comm, MPI_STATUS_IGNORE);
- break;
- }
- mask <<= 1;
- }
-
- mask >>= 1;
- while (mask > 0) {
- if (relative_rank + mask < num_procs) {
- dst = rank + mask;
- if (dst >= num_procs)
- dst -= num_procs;
- Request::send(buff, count, data_type, dst, tag, comm);
- }
- mask >>= 1;
- }
-
- return MPI_SUCCESS;
-}
