1 /* Copyright (c) 2013-2017. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
8 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
9 * University Research and Technology
10 * Corporation. All rights reserved.
11 * Copyright (c) 2004-2009 The University of Tennessee and The University
12 * of Tennessee Research Foundation. All rights
14 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
15 * University of Stuttgart. All rights reserved.
16 * Copyright (c) 2004-2005 The Regents of the University of California.
17 * All rights reserved.
19 * Additional copyrights may follow
21 /* -*- Mode: C; c-basic-offset:4 ; -*- */
22 /* Copyright (c) 2001-2014, The Ohio State University. All rights
25 * This file is part of the MVAPICH2 software package developed by the
26 * team members of The Ohio State University's Network-Based Computing
27 * Laboratory (NBCL), headed by Professor Dhabaleswar K. (DK) Panda.
29 * For detailed copyright and licensing information, please refer to the
30 * copyright file COPYRIGHT in the top level MVAPICH2 directory.
34 * (C) 2001 by Argonne National Laboratory.
35 * See COPYRIGHT in top-level directory.
38 #include "../colls_private.hpp"
40 #define MPIR_Gather_MV2_Direct Coll_gather_ompi_basic_linear::gather
41 #define MPIR_Gather_MV2_two_level_Direct Coll_gather_ompi_basic_linear::gather
42 #define MPIR_Gather_intra Coll_gather_mpich::gather
43 typedef int (*MV2_Gather_function_ptr) (void *sendbuf,
45 MPI_Datatype sendtype,
48 MPI_Datatype recvtype,
49 int root, MPI_Comm comm);
51 extern MV2_Gather_function_ptr MV2_Gather_inter_leader_function;
52 extern MV2_Gather_function_ptr MV2_Gather_intra_node_function;
54 #define TEMP_BUF_HAS_NO_DATA (0)
55 #define TEMP_BUF_HAS_DATA (1)
61 /* sendbuf - (in) sender's buffer
62 * sendcnt - (in) sender's element count
63 * sendtype - (in) sender's data type
64 * recvbuf - (in) receiver's buffer
65 * recvcnt - (in) receiver's element count
66 * recvtype - (in) receiver's data type
67 * root - (in)root for the gather operation
68 * rank - (in) global rank(rank in the global comm)
69 * tmp_buf - (out/in) tmp_buf into which intra node
71 * is_data_avail - (in) based on this, tmp_buf acts
72 * as in/out parameter.
73 * 1 - tmp_buf acts as in parameter
74 * 0 - tmp_buf acts as out parameter
75 * comm_ptr - (in) pointer to the communicator
76 * (shmem_comm or intra_sock_comm or
77 * inter-sock_leader_comm)
78 * intra_node_fn_ptr - (in) Function ptr to choose the
79 * intra node gather function
80 * errflag - (out) to record errors
82 static int MPIR_pt_pt_intra_gather( void *sendbuf, int sendcnt, MPI_Datatype sendtype,
83 void *recvbuf, int recvcnt, MPI_Datatype recvtype,
85 void *tmp_buf, int nbytes,
88 MV2_Gather_function_ptr intra_node_fn_ptr)
90 int mpi_errno = MPI_SUCCESS;
91 MPI_Aint recvtype_extent = 0; /* Datatype extent */
92 MPI_Aint true_lb, sendtype_true_extent, recvtype_true_extent;
95 if (sendtype != MPI_DATATYPE_NULL) {
96 sendtype->extent(&true_lb,
97 &sendtype_true_extent);
99 if (recvtype != MPI_DATATYPE_NULL) {
100 recvtype_extent=recvtype->get_extent();
101 recvtype->extent(&true_lb,
102 &recvtype_true_extent);
105 /* Special case, when tmp_buf itself has data */
106 if (rank == root && sendbuf == MPI_IN_PLACE && is_data_avail) {
108 mpi_errno = intra_node_fn_ptr(MPI_IN_PLACE,
109 sendcnt, sendtype, tmp_buf, nbytes,
112 } else if (rank == root && sendbuf == MPI_IN_PLACE) {
113 mpi_errno = intra_node_fn_ptr((char*)recvbuf +
114 rank * recvcnt * recvtype_extent,
115 recvcnt, recvtype, tmp_buf, nbytes,
118 mpi_errno = intra_node_fn_ptr(sendbuf, sendcnt, sendtype,
119 tmp_buf, nbytes, MPI_BYTE,
129 int Coll_gather_mvapich2_two_level::gather(void *sendbuf,
131 MPI_Datatype sendtype,
134 MPI_Datatype recvtype,
138 void *leader_gather_buf = NULL;
140 int local_rank, local_size;
141 int leader_comm_rank = -1, leader_comm_size = 0;
142 int mpi_errno = MPI_SUCCESS;
143 int recvtype_size = 0, sendtype_size = 0, nbytes=0;
144 int leader_root, leader_of_root;
146 MPI_Aint sendtype_extent = 0, recvtype_extent = 0; /* Datatype extent */
147 MPI_Aint true_lb = 0, sendtype_true_extent = 0, recvtype_true_extent = 0;
148 MPI_Comm shmem_comm, leader_comm;
149 void* tmp_buf = NULL;
152 //if not set (use of the algo directly, without mvapich2 selector)
153 if(MV2_Gather_intra_node_function==NULL)
154 MV2_Gather_intra_node_function= Coll_gather_mpich::gather;
156 if(comm->get_leaders_comm()==MPI_COMM_NULL){
159 comm_size = comm->size();
162 if (((rank == root) && (recvcnt == 0)) ||
163 ((rank != root) && (sendcnt == 0))) {
167 if (sendtype != MPI_DATATYPE_NULL) {
168 sendtype_extent=sendtype->get_extent();
169 sendtype_size=sendtype->size();
170 sendtype->extent(&true_lb,
171 &sendtype_true_extent);
173 if (recvtype != MPI_DATATYPE_NULL) {
174 recvtype_extent=recvtype->get_extent();
175 recvtype_size=recvtype->size();
176 recvtype->extent(&true_lb,
177 &recvtype_true_extent);
180 /* extract the rank,size information for the intra-node
182 shmem_comm = comm->get_intra_comm();
183 local_rank = shmem_comm->rank();
184 local_size = shmem_comm->size();
186 if (local_rank == 0) {
187 /* Node leader. Extract the rank, size information for the leader
189 leader_comm = comm->get_leaders_comm();
190 if(leader_comm==MPI_COMM_NULL){
191 leader_comm = MPI_COMM_WORLD;
193 leader_comm_size = leader_comm->size();
194 leader_comm_rank = leader_comm->size();
198 nbytes = recvcnt * recvtype_size;
201 nbytes = sendcnt * sendtype_size;
204 #if defined(_SMP_LIMIC_)
205 if((g_use_limic2_coll) && (shmem_commptr->ch.use_intra_sock_comm == 1)
206 && (use_limic_gather)
207 &&((num_scheme == USE_GATHER_PT_PT_BINOMIAL)
208 || (num_scheme == USE_GATHER_PT_PT_DIRECT)
209 ||(num_scheme == USE_GATHER_PT_LINEAR_BINOMIAL)
210 || (num_scheme == USE_GATHER_PT_LINEAR_DIRECT)
211 || (num_scheme == USE_GATHER_LINEAR_PT_BINOMIAL)
212 || (num_scheme == USE_GATHER_LINEAR_PT_DIRECT)
213 || (num_scheme == USE_GATHER_LINEAR_LINEAR)
214 || (num_scheme == USE_GATHER_SINGLE_LEADER))) {
216 mpi_errno = MV2_Gather_intra_node_function(sendbuf, sendcnt, sendtype,
217 recvbuf, recvcnt,recvtype,
221 #endif/*#if defined(_SMP_LIMIC_)*/
223 if (local_rank == 0) {
224 /* Node leader, allocate tmp_buffer */
226 tmp_buf = smpi_get_tmp_recvbuffer(recvcnt * MAX(recvtype_extent,
227 recvtype_true_extent) * local_size);
229 tmp_buf = smpi_get_tmp_sendbuffer(sendcnt * MAX(sendtype_extent,
230 sendtype_true_extent) *
233 if (tmp_buf == NULL) {
234 mpi_errno = MPI_ERR_OTHER;
238 /*while testing mpich2 gather test, we see that
239 * which basically splits the comm, and we come to
240 * a point, where use_intra_sock_comm == 0, but if the
241 * intra node function is MPIR_Intra_node_LIMIC_Gather_MV2,
242 * it would use the intra sock comm. In such cases, we
243 * fallback to binomial as a default case.*/
244 #if defined(_SMP_LIMIC_)
245 if(*MV2_Gather_intra_node_function == MPIR_Intra_node_LIMIC_Gather_MV2) {
247 mpi_errno = MPIR_pt_pt_intra_gather(sendbuf,sendcnt, sendtype,
248 recvbuf, recvcnt, recvtype,
251 TEMP_BUF_HAS_NO_DATA,
257 /*We are gathering the data into tmp_buf and the output
258 * will be of MPI_BYTE datatype. Since the tmp_buf has no
259 * local data, we pass is_data_avail = TEMP_BUF_HAS_NO_DATA*/
260 mpi_errno = MPIR_pt_pt_intra_gather(sendbuf,sendcnt, sendtype,
261 recvbuf, recvcnt, recvtype,
264 TEMP_BUF_HAS_NO_DATA,
266 MV2_Gather_intra_node_function
270 leader_comm = comm->get_leaders_comm();
271 int* leaders_map = comm->get_leaders_map();
272 leader_of_root = comm->group()->rank(leaders_map[root]);
273 leader_root = leader_comm->group()->rank(leaders_map[root]);
274 /* leader_root is the rank of the leader of the root in leader_comm.
275 * leader_root is to be used as the root of the inter-leader gather ops
277 if (not comm->is_uniform()) {
278 if (local_rank == 0) {
280 int* recvcnts = NULL;
283 /* Node leaders have all the data. But, different nodes can have
284 * different number of processes. Do a Gather first to get the
285 * buffer lengths at each leader, followed by a Gatherv to move
288 if (leader_comm_rank == leader_root && root != leader_of_root) {
289 /* The root of the Gather operation is not a node-level
290 * leader and this process's rank in the leader_comm
291 * is the same as leader_root */
294 smpi_get_tmp_recvbuffer(recvcnt * MAX(recvtype_extent, recvtype_true_extent) * comm_size);
297 smpi_get_tmp_sendbuffer(sendcnt * MAX(sendtype_extent, sendtype_true_extent) * comm_size);
299 if (leader_gather_buf == NULL) {
300 mpi_errno = MPI_ERR_OTHER;
305 node_sizes = comm->get_non_uniform_map();
307 if (leader_comm_rank == leader_root) {
308 displs = static_cast<int*>(xbt_malloc(sizeof(int) * leader_comm_size));
309 recvcnts = static_cast<int*>(xbt_malloc(sizeof(int) * leader_comm_size));
310 if (not displs || not recvcnts) {
311 mpi_errno = MPI_ERR_OTHER;
316 if (root == leader_of_root) {
317 /* The root of the gather operation is also the node
318 * leader. Receive into recvbuf and we are done */
319 if (leader_comm_rank == leader_root) {
320 recvcnts[0] = node_sizes[0] * recvcnt;
323 for (i = 1; i < leader_comm_size; i++) {
324 displs[i] = displs[i - 1] + node_sizes[i - 1] * recvcnt;
325 recvcnts[i] = node_sizes[i] * recvcnt;
328 Colls::gatherv(tmp_buf, local_size * nbytes, MPI_BYTE, recvbuf, recvcnts, displs, recvtype, leader_root,
331 /* The root of the gather operation is not the node leader.
332 * Receive into leader_gather_buf and then send
334 if (leader_comm_rank == leader_root) {
335 recvcnts[0] = node_sizes[0] * nbytes;
338 for (i = 1; i < leader_comm_size; i++) {
339 displs[i] = displs[i - 1] + node_sizes[i - 1] * nbytes;
340 recvcnts[i] = node_sizes[i] * nbytes;
343 Colls::gatherv(tmp_buf, local_size * nbytes, MPI_BYTE, leader_gather_buf, recvcnts, displs, MPI_BYTE,
344 leader_root, leader_comm);
346 if (leader_comm_rank == leader_root) {
352 /* All nodes have the same number of processes.
353 * Just do one Gather to get all
354 * the data at the leader of the root process */
355 if (local_rank == 0) {
356 if (leader_comm_rank == leader_root && root != leader_of_root) {
357 /* The root of the Gather operation is not a node-level leader
359 leader_gather_buf = smpi_get_tmp_sendbuffer(nbytes * comm_size);
360 if (leader_gather_buf == NULL) {
361 mpi_errno = MPI_ERR_OTHER;
365 if (root == leader_of_root) {
366 mpi_errno = MPIR_Gather_MV2_Direct(tmp_buf,
369 recvcnt * local_size,
370 recvtype, leader_root,
374 mpi_errno = MPIR_Gather_MV2_Direct(tmp_buf, nbytes * local_size,
375 MPI_BYTE, leader_gather_buf,
377 MPI_BYTE, leader_root,
382 if ((local_rank == 0) && (root != rank)
383 && (leader_of_root == rank)) {
384 Request::send(leader_gather_buf,
385 nbytes * comm_size, MPI_BYTE,
386 root, COLL_TAG_GATHER, comm);
389 if (rank == root && local_rank != 0) {
390 /* The root of the gather operation is not the node leader. Receive
391 y* data from the node leader */
392 Request::recv(recvbuf, recvcnt * comm_size, recvtype,
393 leader_of_root, COLL_TAG_GATHER, comm,
397 /* check if multiple threads are calling this collective function */
398 if (local_rank == 0 ) {
399 if (tmp_buf != NULL) {
400 smpi_free_tmp_buffer(tmp_buf);
402 if (leader_gather_buf != NULL) {
403 smpi_free_tmp_buffer(leader_gather_buf);