--- /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. */
+
+/*
+ * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
+ * University Research and Technology
+ * Corporation. All rights reserved.
+ * Copyright (c) 2004-2009 The University of Tennessee and The University
+ * of Tennessee Research Foundation. All rights
+ * reserved.
+ * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
+ * University of Stuttgart. All rights reserved.
+ * Copyright (c) 2004-2005 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Additional copyrights may follow
+ */
+ /* -*- Mode: C; c-basic-offset:4 ; -*- */
+/* Copyright (c) 2001-2014, The Ohio State University. All rights
+ * reserved.
+ *
+ * This file is part of the MVAPICH2 software package developed by the
+ * team members of The Ohio State University's Network-Based Computing
+ * Laboratory (NBCL), headed by Professor Dhabaleswar K. (DK) Panda.
+ *
+ * For detailed copyright and licensing information, please refer to the
+ * copyright file COPYRIGHT in the top level MVAPICH2 directory.
+ */
+/*
+ *
+ * (C) 2001 by Argonne National Laboratory.
+ * See COPYRIGHT in top-level directory.
+ */
+#include "../colls_private.h"
+
+#define MPIR_Scatter_MV2_Binomial smpi_coll_tuned_scatter_ompi_binomial
+#define MPIR_Scatter_MV2_Direct smpi_coll_tuned_scatter_ompi_basic_linear
+
+extern int (*MV2_Scatter_intra_function) (void *sendbuf, int sendcount, MPI_Datatype sendtype,
+ void *recvbuf, int recvcount, MPI_Datatype recvtype,
+ int root, MPI_Comm comm);
+
+int smpi_coll_tuned_scatter_mvapich2_two_level_direct(void *sendbuf,
+ int sendcnt,
+ MPI_Datatype sendtype,
+ void *recvbuf,
+ int recvcnt,
+ MPI_Datatype recvtype,
+ int root, MPI_Comm comm)
+{
+ int comm_size, rank;
+ int local_rank, local_size;
+ int leader_comm_rank = -1, leader_comm_size = -1;
+ int mpi_errno = MPI_SUCCESS;
+ int recvtype_size, sendtype_size, nbytes;
+ void *tmp_buf = NULL;
+ void *leader_scatter_buf = NULL;
+ MPI_Status status;
+ int leader_root, leader_of_root = -1;
+ MPI_Comm shmem_comm, leader_comm;
+ //if not set (use of the algo directly, without mvapich2 selector)
+ if(MV2_Scatter_intra_function==NULL)
+ MV2_Scatter_intra_function=smpi_coll_tuned_scatter_mpich;
+
+ if(comm->get_leaders_comm()==MPI_COMM_NULL){
+ comm->init_smp();
+ }
+ comm_size = comm->size();
+ rank = comm->rank();
+
+ if (((rank == root) && (recvcnt == 0))
+ || ((rank != root) && (sendcnt == 0))) {
+ return MPI_SUCCESS;
+ }
+
+ /* extract the rank,size information for the intra-node
+ * communicator */
+ shmem_comm = comm->get_intra_comm();
+ local_rank = shmem_comm->rank();
+ local_size = shmem_comm->size();
+
+ if (local_rank == 0) {
+ /* Node leader. Extract the rank, size information for the leader
+ * communicator */
+ leader_comm = comm->get_leaders_comm();
+ leader_comm_size = leader_comm->size();
+ leader_comm_rank = leader_comm->rank();
+ }
+
+ if (local_size == comm_size) {
+ /* purely intra-node scatter. Just use the direct algorithm and we are done */
+ mpi_errno = MPIR_Scatter_MV2_Direct(sendbuf, sendcnt, sendtype,
+ recvbuf, recvcnt, recvtype,
+ root, comm);
+
+ } else {
+ recvtype_size=recvtype->size();
+ sendtype_size=sendtype->size();
+
+ if (rank == root) {
+ nbytes = sendcnt * sendtype_size;
+ } else {
+ nbytes = recvcnt * recvtype_size;
+ }
+
+ if (local_rank == 0) {
+ /* Node leader, allocate tmp_buffer */
+ tmp_buf = smpi_get_tmp_sendbuffer(nbytes * local_size);
+ }
+
+ leader_comm = comm->get_leaders_comm();
+ int* leaders_map = comm->get_leaders_map();
+ leader_of_root = comm->group()->rank(leaders_map[root]);
+ leader_root = leader_comm->group()->rank(leaders_map[root]);
+ /* leader_root is the rank of the leader of the root in leader_comm.
+ * leader_root is to be used as the root of the inter-leader gather ops
+ */
+
+ if ((local_rank == 0) && (root != rank)
+ && (leader_of_root == rank)) {
+ /* The root of the scatter operation is not the node leader. Recv
+ * data from the node leader */
+ leader_scatter_buf = smpi_get_tmp_sendbuffer(nbytes * comm_size);
+ Request::recv(leader_scatter_buf, nbytes * comm_size, MPI_BYTE,
+ root, COLL_TAG_SCATTER, comm, &status);
+
+ }
+
+ if (rank == root && local_rank != 0) {
+ /* The root of the scatter operation is not the node leader. Send
+ * data to the node leader */
+ Request::send(sendbuf, sendcnt * comm_size, sendtype,
+ leader_of_root, COLL_TAG_SCATTER, comm
+ );
+ }
+
+ if (leader_comm_size > 1 && local_rank == 0) {
+ if (!comm->is_uniform()) {
+ int *displs = NULL;
+ int *sendcnts = NULL;
+ int *node_sizes;
+ int i = 0;
+ node_sizes = comm->get_non_uniform_map();
+
+ if (root != leader_of_root) {
+ if (leader_comm_rank == leader_root) {
+ displs = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts[0] = node_sizes[0] * nbytes;
+ displs[0] = 0;
+
+ for (i = 1; i < leader_comm_size; i++) {
+ displs[i] =
+ displs[i - 1] + node_sizes[i - 1] * nbytes;
+ sendcnts[i] = node_sizes[i] * nbytes;
+ }
+ }
+ smpi_mpi_scatterv(leader_scatter_buf, sendcnts, displs,
+ MPI_BYTE, tmp_buf, nbytes * local_size,
+ MPI_BYTE, leader_root, leader_comm);
+ } else {
+ if (leader_comm_rank == leader_root) {
+ displs = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts[0] = node_sizes[0] * sendcnt;
+ displs[0] = 0;
+
+ for (i = 1; i < leader_comm_size; i++) {
+ displs[i] =
+ displs[i - 1] + node_sizes[i - 1] * sendcnt;
+ sendcnts[i] = node_sizes[i] * sendcnt;
+ }
+ }
+ smpi_mpi_scatterv(sendbuf, sendcnts, displs,
+ sendtype, tmp_buf,
+ nbytes * local_size, MPI_BYTE,
+ leader_root, leader_comm);
+ }
+ if (leader_comm_rank == leader_root) {
+ xbt_free(displs);
+ xbt_free(sendcnts);
+ }
+ } else {
+ if (leader_of_root != root) {
+ mpi_errno =
+ MPIR_Scatter_MV2_Direct(leader_scatter_buf,
+ nbytes * local_size, MPI_BYTE,
+ tmp_buf, nbytes * local_size,
+ MPI_BYTE, leader_root,
+ leader_comm);
+ } else {
+ mpi_errno =
+ MPIR_Scatter_MV2_Direct(sendbuf, sendcnt * local_size,
+ sendtype, tmp_buf,
+ nbytes * local_size, MPI_BYTE,
+ leader_root, leader_comm);
+
+ }
+ }
+ }
+ /* The leaders are now done with the inter-leader part. Scatter the data within the nodes */
+
+ if (rank == root && recvbuf == MPI_IN_PLACE) {
+ mpi_errno = MV2_Scatter_intra_function(tmp_buf, nbytes, MPI_BYTE,
+ (void *)sendbuf, sendcnt, sendtype,
+ 0, shmem_comm);
+ } else {
+ mpi_errno = MV2_Scatter_intra_function(tmp_buf, nbytes, MPI_BYTE,
+ recvbuf, recvcnt, recvtype,
+ 0, shmem_comm);
+ }
+ }
+
+ /* check if multiple threads are calling this collective function */
+ if (comm_size != local_size && local_rank == 0) {
+ smpi_free_tmp_buffer(tmp_buf);
+ if (leader_of_root == rank && root != rank) {
+ smpi_free_tmp_buffer(leader_scatter_buf);
+ }
+ }
+ return (mpi_errno);
+}
+
+
+int smpi_coll_tuned_scatter_mvapich2_two_level_binomial(void *sendbuf,
+ int sendcnt,
+ MPI_Datatype sendtype,
+ void *recvbuf,
+ int recvcnt,
+ MPI_Datatype recvtype,
+ int root, MPI_Comm comm)
+{
+ int comm_size, rank;
+ int local_rank, local_size;
+ int leader_comm_rank = -1, leader_comm_size = -1;
+ int mpi_errno = MPI_SUCCESS;
+ int recvtype_size, sendtype_size, nbytes;
+ void *tmp_buf = NULL;
+ void *leader_scatter_buf = NULL;
+ MPI_Status status;
+ int leader_root = -1, leader_of_root = -1;
+ MPI_Comm shmem_comm, leader_comm;
+
+
+ //if not set (use of the algo directly, without mvapich2 selector)
+ if(MV2_Scatter_intra_function==NULL)
+ MV2_Scatter_intra_function=smpi_coll_tuned_scatter_mpich;
+
+ if(comm->get_leaders_comm()==MPI_COMM_NULL){
+ comm->init_smp();
+ }
+ comm_size = comm->size();
+ rank = comm->rank();
+
+ if (((rank == root) && (recvcnt == 0))
+ || ((rank != root) && (sendcnt == 0))) {
+ return MPI_SUCCESS;
+ }
+
+ /* extract the rank,size information for the intra-node
+ * communicator */
+ shmem_comm = comm->get_intra_comm();
+ local_rank = shmem_comm->rank();
+ local_size = shmem_comm->size();
+
+ if (local_rank == 0) {
+ /* Node leader. Extract the rank, size information for the leader
+ * communicator */
+ leader_comm = comm->get_leaders_comm();
+ leader_comm_size = leader_comm->size();
+ leader_comm_rank = leader_comm->rank();
+ }
+
+ if (local_size == comm_size) {
+ /* purely intra-node scatter. Just use the direct algorithm and we are done */
+ mpi_errno = MPIR_Scatter_MV2_Direct(sendbuf, sendcnt, sendtype,
+ recvbuf, recvcnt, recvtype,
+ root, comm);
+
+ } else {
+ recvtype_size=recvtype->size();
+ sendtype_size=sendtype->size();
+
+ if (rank == root) {
+ nbytes = sendcnt * sendtype_size;
+ } else {
+ nbytes = recvcnt * recvtype_size;
+ }
+
+ if (local_rank == 0) {
+ /* Node leader, allocate tmp_buffer */
+ tmp_buf = smpi_get_tmp_sendbuffer(nbytes * local_size);
+ }
+ leader_comm = comm->get_leaders_comm();
+ int* leaders_map = comm->get_leaders_map();
+ leader_of_root = comm->group()->rank(leaders_map[root]);
+ leader_root = leader_comm->group()->rank(leaders_map[root]);
+ /* leader_root is the rank of the leader of the root in leader_comm.
+ * leader_root is to be used as the root of the inter-leader gather ops
+ */
+
+ if ((local_rank == 0) && (root != rank)
+ && (leader_of_root == rank)) {
+ /* The root of the scatter operation is not the node leader. Recv
+ * data from the node leader */
+ leader_scatter_buf = smpi_get_tmp_sendbuffer(nbytes * comm_size);
+ Request::recv(leader_scatter_buf, nbytes * comm_size, MPI_BYTE,
+ root, COLL_TAG_SCATTER, comm, &status);
+ }
+
+ if (rank == root && local_rank != 0) {
+ /* The root of the scatter operation is not the node leader. Send
+ * data to the node leader */
+ Request::send(sendbuf, sendcnt * comm_size, sendtype,
+ leader_of_root, COLL_TAG_SCATTER, comm);
+ }
+
+ if (leader_comm_size > 1 && local_rank == 0) {
+ if (!comm->is_uniform()) {
+ int *displs = NULL;
+ int *sendcnts = NULL;
+ int *node_sizes;
+ int i = 0;
+ node_sizes = comm->get_non_uniform_map();
+
+ if (root != leader_of_root) {
+ if (leader_comm_rank == leader_root) {
+ displs = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts[0] = node_sizes[0] * nbytes;
+ displs[0] = 0;
+
+ for (i = 1; i < leader_comm_size; i++) {
+ displs[i] =
+ displs[i - 1] + node_sizes[i - 1] * nbytes;
+ sendcnts[i] = node_sizes[i] * nbytes;
+ }
+ }
+ smpi_mpi_scatterv(leader_scatter_buf, sendcnts, displs,
+ MPI_BYTE, tmp_buf, nbytes * local_size,
+ MPI_BYTE, leader_root, leader_comm);
+ } else {
+ if (leader_comm_rank == leader_root) {
+ displs = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts = static_cast<int*>(xbt_malloc(sizeof (int) * leader_comm_size));
+ sendcnts[0] = node_sizes[0] * sendcnt;
+ displs[0] = 0;
+
+ for (i = 1; i < leader_comm_size; i++) {
+ displs[i] =
+ displs[i - 1] + node_sizes[i - 1] * sendcnt;
+ sendcnts[i] = node_sizes[i] * sendcnt;
+ }
+ }
+ smpi_mpi_scatterv(sendbuf, sendcnts, displs,
+ sendtype, tmp_buf,
+ nbytes * local_size, MPI_BYTE,
+ leader_root, leader_comm);
+ }
+ if (leader_comm_rank == leader_root) {
+ xbt_free(displs);
+ xbt_free(sendcnts);
+ }
+ } else {
+ if (leader_of_root != root) {
+ mpi_errno =
+ MPIR_Scatter_MV2_Binomial(leader_scatter_buf,
+ nbytes * local_size, MPI_BYTE,
+ tmp_buf, nbytes * local_size,
+ MPI_BYTE, leader_root,
+ leader_comm);
+ } else {
+ mpi_errno =
+ MPIR_Scatter_MV2_Binomial(sendbuf, sendcnt * local_size,
+ sendtype, tmp_buf,
+ nbytes * local_size, MPI_BYTE,
+ leader_root, leader_comm);
+
+ }
+ }
+ }
+ /* The leaders are now done with the inter-leader part. Scatter the data within the nodes */
+
+ if (rank == root && recvbuf == MPI_IN_PLACE) {
+ mpi_errno = MV2_Scatter_intra_function(tmp_buf, nbytes, MPI_BYTE,
+ (void *)sendbuf, sendcnt, sendtype,
+ 0, shmem_comm);
+ } else {
+ mpi_errno = MV2_Scatter_intra_function(tmp_buf, nbytes, MPI_BYTE,
+ recvbuf, recvcnt, recvtype,
+ 0, shmem_comm);
+ }
+
+ }
+
+
+ /* check if multiple threads are calling this collective function */
+ if (comm_size != local_size && local_rank == 0) {
+ smpi_free_tmp_buffer(tmp_buf);
+ if (leader_of_root == rank && root != rank) {
+ smpi_free_tmp_buffer(leader_scatter_buf);
+ }
+ }
+
+ return (mpi_errno);
+}
+
