src/smpi/colls/bcast-mvapich-smp.c

   1 /* Copyright (c) 2013-2014. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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. */
   6
   7 /*
   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
  13  *                         reserved.
  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.
  18  *
  19  * Additional copyrights may follow
  20  */
  21  /* -*- Mode: C; c-basic-offset:4 ; -*- */
  22 /* Copyright (c) 2001-2014, The Ohio State University. All rights
  23  * reserved.
  24  *
  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.
  28  *
  29  * For detailed copyright and licensing information, please refer to the
  30  * copyright file COPYRIGHT in the top level MVAPICH2 directory.
  31  */
  32 /*
  33  *
  34  *  (C) 2001 by Argonne National Laboratory.
  35  *      See COPYRIGHT in top-level directory.
  36  */
  37 #include "colls_private.h"
  38
  39
  40 extern int (*MV2_Bcast_function) (void *buffer, int count, MPI_Datatype datatype,
  41                            int root, MPI_Comm comm_ptr);
  42
  43 extern int (*MV2_Bcast_intra_node_function) (void *buffer, int count, MPI_Datatype datatype,
  44                                       int root, MPI_Comm comm_ptr);
  45
  46 extern int zcpy_knomial_factor;
  47 extern int mv2_pipelined_zcpy_knomial_factor;
  48 extern int bcast_segment_size;
  49 extern int mv2_inter_node_knomial_factor;
  50 extern int mv2_intra_node_knomial_factor;
  51 extern int mv2_bcast_two_level_system_size;
  52 #define INTRA_NODE_ROOT 0
  53
  54 #define MPIR_Pipelined_Bcast_Zcpy_MV2 smpi_coll_tuned_bcast_mpich
  55 #define MPIR_Pipelined_Bcast_MV2 smpi_coll_tuned_bcast_mpich
  56 #define MPIR_Bcast_binomial_MV2 smpi_coll_tuned_bcast_binomial_tree
  57 #define MPIR_Bcast_scatter_ring_allgather_shm_MV2 smpi_coll_tuned_bcast_scatter_LR_allgather
  58 #define MPIR_Bcast_scatter_doubling_allgather_MV2 smpi_coll_tuned_bcast_scatter_rdb_allgather
  59 #define MPIR_Bcast_scatter_ring_allgather_MV2 smpi_coll_tuned_bcast_scatter_LR_allgather
  60 #define MPIR_Shmem_Bcast_MV2 smpi_coll_tuned_bcast_mpich
  61 #define MPIR_Bcast_tune_inter_node_helper_MV2 smpi_coll_tuned_bcast_mvapich2_inter_node
  62 #define MPIR_Bcast_inter_node_helper_MV2 smpi_coll_tuned_bcast_mvapich2_inter_node
  63 #define MPIR_Knomial_Bcast_intra_node_MV2 smpi_coll_tuned_bcast_mvapich2_knomial_intra_node
  64 #define MPIR_Bcast_intra_MV2 smpi_coll_tuned_bcast_mvapich2_intra_node
  65
  66 extern int zcpy_knomial_factor;
  67 extern int mv2_pipelined_zcpy_knomial_factor;
  68 extern int bcast_segment_size;
  69 extern int mv2_inter_node_knomial_factor;
  70 extern int mv2_intra_node_knomial_factor;
  71 #define mv2_bcast_two_level_system_size  64
  72 #define mv2_bcast_short_msg             16384
  73 #define mv2_bcast_large_msg            512*1024
  74 #define mv2_knomial_intra_node_threshold 131072
  75 #define mv2_scatter_rd_inter_leader_bcast 1
  76 int smpi_coll_tuned_bcast_mvapich2_inter_node(void *buffer,
  77                                                  int count,
  78                                                  MPI_Datatype datatype,
  79                                                  int root,
  80                                                  MPI_Comm  comm)
  81 {
  82     int rank;
  83     int mpi_errno = MPI_SUCCESS;
  84     MPI_Comm shmem_comm, leader_comm;
  85     int local_rank, local_size, global_rank = -1;
  86     int leader_root, leader_of_root;
  87
  88
  89     rank = smpi_comm_rank(comm);
  90     //comm_size = smpi_comm_size(comm);
  91
  92
  93     if (MV2_Bcast_function==NULL){
  94       MV2_Bcast_function=smpi_coll_tuned_bcast_mpich;
  95     }
  96
  97     if (MV2_Bcast_intra_node_function==NULL){
  98       MV2_Bcast_intra_node_function= smpi_coll_tuned_bcast_mpich;
  99     }
 100
 101     if(smpi_comm_get_leaders_comm(comm)==MPI_COMM_NULL){
 102       smpi_comm_init_smp(comm);
 103     }
 104
 105     shmem_comm = smpi_comm_get_intra_comm(comm);
 106     local_rank = smpi_comm_rank(shmem_comm);
 107     local_size = smpi_comm_size(shmem_comm);
 108
 109     leader_comm = smpi_comm_get_leaders_comm(comm);
 110
 111     if ((local_rank == 0) && (local_size > 1)) {
 112       global_rank = smpi_comm_rank(leader_comm);
 113     }
 114
 115     int* leaders_map = smpi_comm_get_leaders_map(comm);
 116     leader_of_root = smpi_group_rank(smpi_comm_group(comm),leaders_map[root]);
 117     leader_root = smpi_group_rank(smpi_comm_group(leader_comm),leaders_map[root]);
 118
 119
 120     if (local_size > 1) {
 121         if ((local_rank == 0) && (root != rank) && (leader_root == global_rank)) {
 122             smpi_mpi_recv(buffer, count, datatype, root,
 123                                      COLL_TAG_BCAST, comm, MPI_STATUS_IGNORE);
 124         }
 125         if ((local_rank != 0) && (root == rank)) {
 126             smpi_mpi_send(buffer, count, datatype,
 127                                      leader_of_root, COLL_TAG_BCAST, comm);
 128         }
 129     }
 130 #if defined(_MCST_SUPPORT_)
 131     if (comm_ptr->ch.is_mcast_ok) {
 132         mpi_errno = MPIR_Mcast_inter_node_MV2(buffer, count, datatype, root, comm_ptr,
 133                                               errflag);
 134         if (mpi_errno == MPI_SUCCESS) {
 135             goto fn_exit;
 136         } else {
 137             goto fn_fail;
 138         }
 139     }
 140 #endif
 141 /*
 142     if (local_rank == 0) {
 143         leader_comm = smpi_comm_get_leaders_comm(comm);
 144         root = leader_root;
 145     }
 146
 147     if (MV2_Bcast_function == &MPIR_Pipelined_Bcast_MV2) {
 148         mpi_errno = MPIR_Pipelined_Bcast_MV2(buffer, count, datatype,
 149                                              root, comm);
 150     } else if (MV2_Bcast_function == &MPIR_Bcast_scatter_ring_allgather_shm_MV2) {
 151         mpi_errno = MPIR_Bcast_scatter_ring_allgather_shm_MV2(buffer, count,
 152                                                               datatype, root,
 153                                                               comm);
 154     } else */{
 155         if (local_rank == 0) {
 156       /*      if (MV2_Bcast_function == &MPIR_Knomial_Bcast_inter_node_wrapper_MV2) {
 157                 mpi_errno = MPIR_Knomial_Bcast_inter_node_wrapper_MV2(buffer, count,
 158                                                               datatype, root,
 159                                                               comm);
 160             } else {*/
 161                 mpi_errno = MV2_Bcast_function(buffer, count, datatype,
 162                                                leader_root, leader_comm);
 163           //  }
 164         }
 165     }
 166
 167     return mpi_errno;
 168 }
 169
 170
 171 int smpi_coll_tuned_bcast_mvapich2_knomial_intra_node(void *buffer,
 172                                       int count,
 173                                       MPI_Datatype datatype,
 174                                       int root, MPI_Comm  comm)
 175 {
 176     int local_size = 0, rank;
 177     int mpi_errno = MPI_SUCCESS;
 178     MPI_Request *reqarray = NULL;
 179     MPI_Status *starray = NULL;
 180     int src, dst, mask, relative_rank;
 181     int k;
 182     if (MV2_Bcast_function==NULL){
 183       MV2_Bcast_function=smpi_coll_tuned_bcast_mpich;
 184     }
 185
 186     if (MV2_Bcast_intra_node_function==NULL){
 187       MV2_Bcast_intra_node_function= smpi_coll_tuned_bcast_mpich;
 188     }
 189
 190     if(smpi_comm_get_leaders_comm(comm)==MPI_COMM_NULL){
 191       smpi_comm_init_smp(comm);
 192     }
 193
 194     local_size = smpi_comm_size(comm);
 195     rank = smpi_comm_rank(comm);
 196
 197
 198     reqarray=(MPI_Request *)xbt_malloc(2 * mv2_intra_node_knomial_factor * sizeof (MPI_Request));
 199
 200     starray=(MPI_Status *)xbt_malloc(2 * mv2_intra_node_knomial_factor * sizeof (MPI_Status));
 201
 202     /* intra-node k-nomial bcast  */
 203     if (local_size > 1) {
 204         relative_rank = (rank >= root) ? rank - root : rank - root + local_size;
 205         mask = 0x1;
 206
 207         while (mask < local_size) {
 208             if (relative_rank % (mv2_intra_node_knomial_factor * mask)) {
 209                 src = relative_rank / (mv2_intra_node_knomial_factor * mask) *
 210                     (mv2_intra_node_knomial_factor * mask) + root;
 211                 if (src >= local_size) {
 212                     src -= local_size;
 213                 }
 214
 215                 smpi_mpi_recv(buffer, count, datatype, src,
 216                                          COLL_TAG_BCAST, comm,
 217                                          MPI_STATUS_IGNORE);
 218                 break;
 219             }
 220             mask *= mv2_intra_node_knomial_factor;
 221         }
 222         mask /= mv2_intra_node_knomial_factor;
 223
 224         while (mask > 0) {
 225             int reqs = 0;
 226             for (k = 1; k < mv2_intra_node_knomial_factor; k++) {
 227                 if (relative_rank + mask * k < local_size) {
 228                     dst = rank + mask * k;
 229                     if (dst >= local_size) {
 230                         dst -= local_size;
 231                     }
 232                     reqarray[reqs++]=smpi_mpi_isend(buffer, count, datatype, dst,
 233                                               COLL_TAG_BCAST, comm);
 234                 }
 235             }
 236             smpi_mpi_waitall(reqs, reqarray, starray);
 237
 238             mask /= mv2_intra_node_knomial_factor;
 239         }
 240     }
 241
 242     return mpi_errno;
 243 }
 244
 245
 246 int smpi_coll_tuned_bcast_mvapich2_intra_node(void *buffer,
 247                          int count,
 248                          MPI_Datatype datatype,
 249                          int root, MPI_Comm  comm)
 250 {
 251     int mpi_errno = MPI_SUCCESS;
 252     int comm_size;
 253     int two_level_bcast = 1;
 254     size_t nbytes = 0;
 255     int is_homogeneous, is_contig;
 256     MPI_Aint type_size;
 257     void *tmp_buf = NULL;
 258     MPI_Comm shmem_comm;
 259
 260     if (count == 0)
 261         return MPI_SUCCESS;
 262     if (MV2_Bcast_function==NULL){
 263       MV2_Bcast_function=smpi_coll_tuned_bcast_mpich;
 264     }
 265
 266     if (MV2_Bcast_intra_node_function==NULL){
 267       MV2_Bcast_intra_node_function= smpi_coll_tuned_bcast_mpich;
 268     }
 269
 270     if(smpi_comm_get_leaders_comm(comm)==MPI_COMM_NULL){
 271       smpi_comm_init_smp(comm);
 272     }
 273
 274     comm_size = smpi_comm_size(comm);
 275    // rank = smpi_comm_rank(comm);
 276 /*
 277     if (HANDLE_GET_KIND(datatype) == HANDLE_KIND_BUILTIN)*/
 278         is_contig = 1;
 279 /*    else {
 280         MPID_Datatype_get_ptr(datatype, dtp);
 281         is_contig = dtp->is_contig;
 282     }
 283 */
 284     is_homogeneous = 1;
 285 #ifdef MPID_HAS_HETERO
 286     if (comm_ptr->is_hetero)
 287         is_homogeneous = 0;
 288 #endif
 289
 290     /* MPI_Type_size() might not give the accurate size of the packed
 291      * datatype for heterogeneous systems (because of padding, encoding,
 292      * etc). On the other hand, MPI_Pack_size() can become very
 293      * expensive, depending on the implementation, especially for
 294      * heterogeneous systems. We want to use MPI_Type_size() wherever
 295      * possible, and MPI_Pack_size() in other places.
 296      */
 297     //if (is_homogeneous) {
 298         type_size=smpi_datatype_size(datatype);
 299     //} /*else {*/
 300 /*        MPIR_Pack_size_impl(1, datatype, &type_size);*/
 301 /*    }*/
 302     nbytes = (size_t) (count) * (type_size);
 303     if (comm_size <= mv2_bcast_two_level_system_size) {
 304         if (nbytes > mv2_bcast_short_msg && nbytes < mv2_bcast_large_msg) {
 305             two_level_bcast = 1;
 306         } else {
 307             two_level_bcast = 0;
 308         }
 309     }
 310
 311     if (two_level_bcast == 1
 312 #if defined(_MCST_SUPPORT_)
 313             || comm_ptr->ch.is_mcast_ok
 314 #endif
 315         ) {
 316
 317         if (!is_contig || !is_homogeneous) {
 318             tmp_buf=(void *)smpi_get_tmp_sendbuffer(nbytes);
 319
 320             /* TODO: Pipeline the packing and communication */
 321            // position = 0;
 322 /*            if (rank == root) {*/
 323 /*                mpi_errno =*/
 324 /*                    MPIR_Pack_impl(buffer, count, datatype, tmp_buf, nbytes, &position);*/
 325 /*                if (mpi_errno)*/
 326 /*                    MPIU_ERR_POP(mpi_errno);*/
 327 /*            }*/
 328         }
 329
 330         shmem_comm = smpi_comm_get_intra_comm(comm);
 331         if (!is_contig || !is_homogeneous) {
 332             mpi_errno =
 333                 MPIR_Bcast_inter_node_helper_MV2(tmp_buf, nbytes, MPI_BYTE,
 334                                                  root, comm);
 335         } else {
 336             mpi_errno =
 337                 MPIR_Bcast_inter_node_helper_MV2(buffer, count, datatype, root,
 338                                                  comm);
 339         }
 340
 341         /* We are now done with the inter-node phase */
 342             if (nbytes <= mv2_knomial_intra_node_threshold) {
 343                 if (!is_contig || !is_homogeneous) {
 344                     mpi_errno = MPIR_Shmem_Bcast_MV2(tmp_buf, nbytes, MPI_BYTE,
 345                                                      root, shmem_comm);
 346                 } else {
 347                     mpi_errno = MPIR_Shmem_Bcast_MV2(buffer, count, datatype,
 348                                                      root, shmem_comm);
 349                 }
 350             } else {
 351                 if (!is_contig || !is_homogeneous) {
 352                     mpi_errno =
 353                         MPIR_Knomial_Bcast_intra_node_MV2(tmp_buf, nbytes,
 354                                                           MPI_BYTE,
 355                                                           INTRA_NODE_ROOT,
 356                                                           shmem_comm);
 357                 } else {
 358                     mpi_errno =
 359                         MPIR_Knomial_Bcast_intra_node_MV2(buffer, count,
 360                                                           datatype,
 361                                                           INTRA_NODE_ROOT,
 362                                                           shmem_comm);
 363                 }
 364             }
 365
 366     } else {
 367         if (nbytes <= mv2_bcast_short_msg) {
 368             mpi_errno = MPIR_Bcast_binomial_MV2(buffer, count, datatype, root,
 369                                                 comm);
 370         } else {
 371             if (mv2_scatter_rd_inter_leader_bcast) {
 372                 mpi_errno = MPIR_Bcast_scatter_ring_allgather_MV2(buffer, count,
 373                                                                   datatype,
 374                                                                   root,
 375                                                                   comm);
 376             } else {
 377                 mpi_errno =
 378                     MPIR_Bcast_scatter_doubling_allgather_MV2(buffer, count,
 379                                                               datatype, root,
 380                                                               comm);
 381             }
 382         }
 383     }
 384
 385
 386     return mpi_errno;
 387
 388 }