1 /* selector for collective algorithms based on mvapich decision logic */
3 /* Copyright (c) 2009-2019. The SimGrid Team.
4 * All rights reserved. */
6 /* This program is free software; you can redistribute it and/or modify it
7 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "colls_private.hpp"
11 #include "smpi_mvapich2_selector_stampede.hpp"
17 int Coll_alltoall_mvapich2::alltoall( void *sendbuf, int sendcount,
18 MPI_Datatype sendtype,
19 void* recvbuf, int recvcount,
20 MPI_Datatype recvtype,
24 if(mv2_alltoall_table_ppn_conf==NULL)
25 init_mv2_alltoall_tables_stampede();
27 int sendtype_size, recvtype_size, comm_size;
28 char * tmp_buf = NULL;
29 int mpi_errno=MPI_SUCCESS;
31 int range_threshold = 0;
33 comm_size = comm->size();
35 sendtype_size=sendtype->size();
36 recvtype_size=recvtype->size();
37 long nbytes = sendtype_size * sendcount;
39 /* check if safe to use partial subscription mode */
41 /* Search for the corresponding system size inside the tuning table */
42 while ((range < (mv2_size_alltoall_tuning_table[conf_index] - 1)) &&
43 (comm_size > mv2_alltoall_thresholds_table[conf_index][range].numproc)) {
46 /* Search for corresponding inter-leader function */
47 while ((range_threshold < (mv2_alltoall_thresholds_table[conf_index][range].size_table - 1))
49 mv2_alltoall_thresholds_table[conf_index][range].algo_table[range_threshold].max)
50 && (mv2_alltoall_thresholds_table[conf_index][range].algo_table[range_threshold].max != -1)) {
53 MV2_Alltoall_function = mv2_alltoall_thresholds_table[conf_index][range].algo_table[range_threshold]
54 .MV2_pt_Alltoall_function;
56 if(sendbuf != MPI_IN_PLACE) {
57 mpi_errno = MV2_Alltoall_function(sendbuf, sendcount, sendtype,
58 recvbuf, recvcount, recvtype,
63 mv2_alltoall_thresholds_table[conf_index][range].in_place_algo_table[range_threshold].min
64 ||nbytes > mv2_alltoall_thresholds_table[conf_index][range].in_place_algo_table[range_threshold].max
66 tmp_buf = (char *)smpi_get_tmp_sendbuffer( comm_size * recvcount * recvtype_size );
67 Datatype::copy((char *)recvbuf,
68 comm_size*recvcount, recvtype,
70 comm_size*recvcount, recvtype);
72 mpi_errno = MV2_Alltoall_function(tmp_buf, recvcount, recvtype,
73 recvbuf, recvcount, recvtype,
75 smpi_free_tmp_buffer(tmp_buf);
77 mpi_errno = MPIR_Alltoall_inplace_MV2(sendbuf, sendcount, sendtype,
78 recvbuf, recvcount, recvtype,
87 int Coll_allgather_mvapich2::allgather(void *sendbuf, int sendcount, MPI_Datatype sendtype,
88 void *recvbuf, int recvcount, MPI_Datatype recvtype,
92 int mpi_errno = MPI_SUCCESS;
93 long nbytes = 0, comm_size, recvtype_size;
95 int partial_sub_ok = 0;
97 int range_threshold = 0;
100 //MPI_Comm *shmem_commptr=NULL;
101 /* Get the size of the communicator */
102 comm_size = comm->size();
103 recvtype_size=recvtype->size();
104 nbytes = recvtype_size * recvcount;
106 if(mv2_allgather_table_ppn_conf==NULL)
107 init_mv2_allgather_tables_stampede();
109 if(comm->get_leaders_comm()==MPI_COMM_NULL){
113 if (comm->is_uniform()){
114 shmem_comm = comm->get_intra_comm();
115 int local_size = shmem_comm->size();
117 if (mv2_allgather_table_ppn_conf[0] == -1) {
118 // Indicating user defined tuning
123 if (local_size == mv2_allgather_table_ppn_conf[i]) {
129 } while(i < mv2_allgather_num_ppn_conf);
132 if (partial_sub_ok != 1) {
136 /* Search for the corresponding system size inside the tuning table */
137 while ((range < (mv2_size_allgather_tuning_table[conf_index] - 1)) &&
139 mv2_allgather_thresholds_table[conf_index][range].numproc)) {
142 /* Search for corresponding inter-leader function */
143 while ((range_threshold <
144 (mv2_allgather_thresholds_table[conf_index][range].size_inter_table - 1))
145 && (nbytes > mv2_allgather_thresholds_table[conf_index][range].inter_leader[range_threshold].max)
146 && (mv2_allgather_thresholds_table[conf_index][range].inter_leader[range_threshold].max !=
151 /* Set inter-leader pt */
153 mv2_allgather_thresholds_table[conf_index][range].inter_leader[range_threshold].
154 MV2_pt_Allgatherction;
156 is_two_level = mv2_allgather_thresholds_table[conf_index][range].two_level[range_threshold];
158 /* intracommunicator */
159 if(is_two_level ==1){
160 if(partial_sub_ok ==1){
161 if (comm->is_blocked()){
162 mpi_errno = MPIR_2lvl_Allgather_MV2(sendbuf, sendcount, sendtype,
163 recvbuf, recvcount, recvtype,
166 mpi_errno = Coll_allgather_mpich::allgather(sendbuf, sendcount, sendtype,
167 recvbuf, recvcount, recvtype,
171 mpi_errno = MPIR_Allgather_RD_MV2(sendbuf, sendcount, sendtype,
172 recvbuf, recvcount, recvtype,
175 } else if(MV2_Allgatherction == &MPIR_Allgather_Bruck_MV2
176 || MV2_Allgatherction == &MPIR_Allgather_RD_MV2
177 || MV2_Allgatherction == &MPIR_Allgather_Ring_MV2) {
178 mpi_errno = MV2_Allgatherction(sendbuf, sendcount, sendtype,
179 recvbuf, recvcount, recvtype,
182 return MPI_ERR_OTHER;
188 int Coll_gather_mvapich2::gather(void *sendbuf,
190 MPI_Datatype sendtype,
193 MPI_Datatype recvtype,
194 int root, MPI_Comm comm)
196 if(mv2_gather_thresholds_table==NULL)
197 init_mv2_gather_tables_stampede();
199 int mpi_errno = MPI_SUCCESS;
201 int range_threshold = 0;
202 int range_intra_threshold = 0;
204 int recvtype_size, sendtype_size;
205 int comm_size = comm->size();
206 int rank = comm->rank();
209 recvtype_size=recvtype->size();
210 nbytes = recvcnt * recvtype_size;
212 sendtype_size=sendtype->size();
213 nbytes = sendcnt * sendtype_size;
216 /* Search for the corresponding system size inside the tuning table */
217 while ((range < (mv2_size_gather_tuning_table - 1)) &&
218 (comm_size > mv2_gather_thresholds_table[range].numproc)) {
221 /* Search for corresponding inter-leader function */
222 while ((range_threshold < (mv2_gather_thresholds_table[range].size_inter_table - 1))
224 mv2_gather_thresholds_table[range].inter_leader[range_threshold].max)
225 && (mv2_gather_thresholds_table[range].inter_leader[range_threshold].max !=
230 /* Search for corresponding intra node function */
231 while ((range_intra_threshold < (mv2_gather_thresholds_table[range].size_intra_table - 1))
233 mv2_gather_thresholds_table[range].intra_node[range_intra_threshold].max)
234 && (mv2_gather_thresholds_table[range].intra_node[range_intra_threshold].max !=
236 range_intra_threshold++;
239 if (comm->is_blocked() ) {
240 // Set intra-node function pt for gather_two_level
241 MV2_Gather_intra_node_function =
242 mv2_gather_thresholds_table[range].intra_node[range_intra_threshold].
243 MV2_pt_Gather_function;
244 //Set inter-leader pt
245 MV2_Gather_inter_leader_function =
246 mv2_gather_thresholds_table[range].inter_leader[range_threshold].
247 MV2_pt_Gather_function;
248 // We call Gather function
250 MV2_Gather_inter_leader_function(sendbuf, sendcnt, sendtype, recvbuf, recvcnt,
251 recvtype, root, comm);
254 // Indeed, direct (non SMP-aware)gather is MPICH one
255 mpi_errno = Coll_gather_mpich::gather(sendbuf, sendcnt, sendtype,
256 recvbuf, recvcnt, recvtype,
263 int Coll_allgatherv_mvapich2::allgatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype,
264 void *recvbuf, int *recvcounts, int *displs,
265 MPI_Datatype recvtype, MPI_Comm comm )
267 int mpi_errno = MPI_SUCCESS;
268 int range = 0, comm_size, total_count, recvtype_size, i;
269 int range_threshold = 0;
272 if(mv2_allgatherv_thresholds_table==NULL)
273 init_mv2_allgatherv_tables_stampede();
275 comm_size = comm->size();
277 for (i = 0; i < comm_size; i++)
278 total_count += recvcounts[i];
280 recvtype_size=recvtype->size();
281 nbytes = total_count * recvtype_size;
283 /* Search for the corresponding system size inside the tuning table */
284 while ((range < (mv2_size_allgatherv_tuning_table - 1)) &&
285 (comm_size > mv2_allgatherv_thresholds_table[range].numproc)) {
288 /* Search for corresponding inter-leader function */
289 while ((range_threshold < (mv2_allgatherv_thresholds_table[range].size_inter_table - 1))
291 comm_size * mv2_allgatherv_thresholds_table[range].inter_leader[range_threshold].max)
292 && (mv2_allgatherv_thresholds_table[range].inter_leader[range_threshold].max !=
296 /* Set inter-leader pt */
297 MV2_Allgatherv_function =
298 mv2_allgatherv_thresholds_table[range].inter_leader[range_threshold].
299 MV2_pt_Allgatherv_function;
301 if (MV2_Allgatherv_function == &MPIR_Allgatherv_Rec_Doubling_MV2)
303 if (not(comm_size & (comm_size - 1))) {
305 MPIR_Allgatherv_Rec_Doubling_MV2(sendbuf, sendcount, sendtype, recvbuf, recvcounts, displs, recvtype, comm);
308 MPIR_Allgatherv_Bruck_MV2(sendbuf, sendcount,
315 MV2_Allgatherv_function(sendbuf, sendcount, sendtype,
316 recvbuf, recvcounts, displs,
325 int Coll_allreduce_mvapich2::allreduce(void *sendbuf,
328 MPI_Datatype datatype,
329 MPI_Op op, MPI_Comm comm)
332 int mpi_errno = MPI_SUCCESS;
336 comm_size = comm->size();
337 //rank = comm->rank();
343 if (mv2_allreduce_thresholds_table == NULL)
344 init_mv2_allreduce_tables_stampede();
346 /* check if multiple threads are calling this collective function */
348 MPI_Aint sendtype_size = 0;
350 int is_commutative = 0;
351 MPI_Aint true_lb, true_extent;
353 sendtype_size=datatype->size();
354 nbytes = count * sendtype_size;
356 datatype->extent(&true_lb, &true_extent);
358 //is_commutative = op->is_commutative();
361 int range = 0, range_threshold = 0, range_threshold_intra = 0;
362 int is_two_level = 0;
364 /* Search for the corresponding system size inside the tuning table */
365 while ((range < (mv2_size_allreduce_tuning_table - 1)) &&
366 (comm_size > mv2_allreduce_thresholds_table[range].numproc)) {
369 /* Search for corresponding inter-leader function */
370 /* skip mcast poiters if mcast is not available */
371 if(mv2_allreduce_thresholds_table[range].mcast_enabled != 1){
372 while ((range_threshold < (mv2_allreduce_thresholds_table[range].size_inter_table - 1))
373 && ((mv2_allreduce_thresholds_table[range].
374 inter_leader[range_threshold].MV2_pt_Allreducection
375 == &MPIR_Allreduce_mcst_reduce_redscat_gather_MV2) ||
376 (mv2_allreduce_thresholds_table[range].
377 inter_leader[range_threshold].MV2_pt_Allreducection
378 == &MPIR_Allreduce_mcst_reduce_two_level_helper_MV2)
383 while ((range_threshold < (mv2_allreduce_thresholds_table[range].size_inter_table - 1))
385 mv2_allreduce_thresholds_table[range].inter_leader[range_threshold].max)
386 && (mv2_allreduce_thresholds_table[range].inter_leader[range_threshold].max != -1)) {
389 if(mv2_allreduce_thresholds_table[range].is_two_level_allreduce[range_threshold] == 1){
392 /* Search for corresponding intra-node function */
393 while ((range_threshold_intra <
394 (mv2_allreduce_thresholds_table[range].size_intra_table - 1))
396 mv2_allreduce_thresholds_table[range].intra_node[range_threshold_intra].max)
397 && (mv2_allreduce_thresholds_table[range].intra_node[range_threshold_intra].max !=
399 range_threshold_intra++;
402 MV2_Allreducection = mv2_allreduce_thresholds_table[range].inter_leader[range_threshold]
403 .MV2_pt_Allreducection;
405 MV2_Allreduce_intra_function = mv2_allreduce_thresholds_table[range].intra_node[range_threshold_intra]
406 .MV2_pt_Allreducection;
408 /* check if mcast is ready, otherwise replace mcast with other algorithm */
409 if((MV2_Allreducection == &MPIR_Allreduce_mcst_reduce_redscat_gather_MV2)||
410 (MV2_Allreducection == &MPIR_Allreduce_mcst_reduce_two_level_helper_MV2)){
412 MV2_Allreducection = &MPIR_Allreduce_pt2pt_rd_MV2;
414 if(is_two_level != 1) {
415 MV2_Allreducection = &MPIR_Allreduce_pt2pt_rd_MV2;
419 if(is_two_level == 1){
420 // check if shm is ready, if not use other algorithm first
421 if (is_commutative) {
422 if(comm->get_leaders_comm()==MPI_COMM_NULL){
425 mpi_errno = MPIR_Allreduce_two_level_MV2(sendbuf, recvbuf, count,
428 mpi_errno = MPIR_Allreduce_pt2pt_rd_MV2(sendbuf, recvbuf, count,
432 mpi_errno = MV2_Allreducection(sendbuf, recvbuf, count,
437 //comm->ch.intra_node_done=0;
445 int Coll_alltoallv_mvapich2::alltoallv(void *sbuf, int *scounts, int *sdisps,
447 void *rbuf, int *rcounts, int *rdisps,
453 if (sbuf == MPI_IN_PLACE) {
454 return Coll_alltoallv_ompi_basic_linear::alltoallv(sbuf, scounts, sdisps, sdtype,
455 rbuf, rcounts, rdisps,rdtype,
457 } else /* For starters, just keep the original algorithm. */
458 return Coll_alltoallv_ring::alltoallv(sbuf, scounts, sdisps, sdtype,
459 rbuf, rcounts, rdisps,rdtype,
464 int Coll_barrier_mvapich2::barrier(MPI_Comm comm)
466 return Coll_barrier_mvapich2_pair::barrier(comm);
472 int Coll_bcast_mvapich2::bcast(void *buffer,
474 MPI_Datatype datatype,
475 int root, MPI_Comm comm)
477 int mpi_errno = MPI_SUCCESS;
478 int comm_size/*, rank*/;
479 int two_level_bcast = 1;
482 int range_threshold = 0;
483 int range_threshold_intra = 0;
484 int is_homogeneous, is_contig;
487 void *tmp_buf = NULL;
489 //MPID_Datatype *dtp;
493 if(comm->get_leaders_comm()==MPI_COMM_NULL){
496 if (not mv2_bcast_thresholds_table)
497 init_mv2_bcast_tables_stampede();
498 comm_size = comm->size();
499 //rank = comm->rank();
502 /* if (HANDLE_GET_KIND(datatype) == HANDLE_KIND_BUILTIN)*/
505 /* MPID_Datatype_get_ptr(datatype, dtp);*/
506 /* is_contig = dtp->is_contig;*/
511 /* MPI_Type_size() might not give the accurate size of the packed
512 * datatype for heterogeneous systems (because of padding, encoding,
513 * etc). On the other hand, MPI_Pack_size() can become very
514 * expensive, depending on the implementation, especially for
515 * heterogeneous systems. We want to use MPI_Type_size() wherever
516 * possible, and MPI_Pack_size() in other places.
518 //if (is_homogeneous) {
519 type_size=datatype->size();
522 MPIR_Pack_size_impl(1, datatype, &type_size);
524 nbytes = (count) * (type_size);
526 /* Search for the corresponding system size inside the tuning table */
527 while ((range < (mv2_size_bcast_tuning_table - 1)) &&
528 (comm_size > mv2_bcast_thresholds_table[range].numproc)) {
531 /* Search for corresponding inter-leader function */
532 while ((range_threshold < (mv2_bcast_thresholds_table[range].size_inter_table - 1))
534 mv2_bcast_thresholds_table[range].inter_leader[range_threshold].max)
535 && (mv2_bcast_thresholds_table[range].inter_leader[range_threshold].max != -1)) {
539 /* Search for corresponding intra-node function */
540 while ((range_threshold_intra <
541 (mv2_bcast_thresholds_table[range].size_intra_table - 1))
543 mv2_bcast_thresholds_table[range].intra_node[range_threshold_intra].max)
544 && (mv2_bcast_thresholds_table[range].intra_node[range_threshold_intra].max !=
546 range_threshold_intra++;
550 mv2_bcast_thresholds_table[range].inter_leader[range_threshold].
551 MV2_pt_Bcast_function;
553 MV2_Bcast_intra_node_function =
554 mv2_bcast_thresholds_table[range].
555 intra_node[range_threshold_intra].MV2_pt_Bcast_function;
557 /* if (mv2_user_bcast_intra == NULL && */
558 /* MV2_Bcast_intra_node_function == &MPIR_Knomial_Bcast_intra_node_MV2) {*/
559 /* MV2_Bcast_intra_node_function = &MPIR_Shmem_Bcast_MV2;*/
562 if (mv2_bcast_thresholds_table[range].inter_leader[range_threshold].
563 zcpy_pipelined_knomial_factor != -1) {
564 zcpy_knomial_factor =
565 mv2_bcast_thresholds_table[range].inter_leader[range_threshold].
566 zcpy_pipelined_knomial_factor;
569 if (mv2_pipelined_zcpy_knomial_factor != -1) {
570 zcpy_knomial_factor = mv2_pipelined_zcpy_knomial_factor;
573 if(MV2_Bcast_intra_node_function == NULL) {
574 /* if tuning table do not have any intra selection, set func pointer to
575 ** default one for mcast intra node */
576 MV2_Bcast_intra_node_function = &MPIR_Shmem_Bcast_MV2;
579 /* Set value of pipeline segment size */
580 bcast_segment_size = mv2_bcast_thresholds_table[range].bcast_segment_size;
582 /* Set value of inter node knomial factor */
583 mv2_inter_node_knomial_factor = mv2_bcast_thresholds_table[range].inter_node_knomial_factor;
585 /* Set value of intra node knomial factor */
586 mv2_intra_node_knomial_factor = mv2_bcast_thresholds_table[range].intra_node_knomial_factor;
588 /* Check if we will use a two level algorithm or not */
590 #if defined(_MCST_SUPPORT_)
591 mv2_bcast_thresholds_table[range].is_two_level_bcast[range_threshold]
592 || comm->ch.is_mcast_ok;
594 mv2_bcast_thresholds_table[range].is_two_level_bcast[range_threshold];
596 if (two_level_bcast == 1) {
597 if (not is_contig || not is_homogeneous) {
598 tmp_buf = (void*)smpi_get_tmp_sendbuffer(nbytes);
601 /* if (rank == root) {*/
603 /* MPIR_Pack_impl(buffer, count, datatype, tmp_buf, nbytes, &position);*/
605 /* MPIU_ERR_POP(mpi_errno);*/
608 #ifdef CHANNEL_MRAIL_GEN2
609 if ((mv2_enable_zcpy_bcast == 1) &&
610 (&MPIR_Pipelined_Bcast_Zcpy_MV2 == MV2_Bcast_function)) {
611 if (not is_contig || not is_homogeneous) {
612 mpi_errno = MPIR_Pipelined_Bcast_Zcpy_MV2(tmp_buf, nbytes, MPI_BYTE, root, comm);
614 mpi_errno = MPIR_Pipelined_Bcast_Zcpy_MV2(buffer, count, datatype,
618 #endif /* defined(CHANNEL_MRAIL_GEN2) */
620 shmem_comm = comm->get_intra_comm();
621 if (not is_contig || not is_homogeneous) {
622 MPIR_Bcast_tune_inter_node_helper_MV2(tmp_buf, nbytes, MPI_BYTE, root, comm);
624 MPIR_Bcast_tune_inter_node_helper_MV2(buffer, count, datatype, root, comm);
627 /* We are now done with the inter-node phase */
630 root = INTRA_NODE_ROOT;
632 if (not is_contig || not is_homogeneous) {
633 mpi_errno = MV2_Bcast_intra_node_function(tmp_buf, nbytes, MPI_BYTE, root, shmem_comm);
635 mpi_errno = MV2_Bcast_intra_node_function(buffer, count,
636 datatype, root, shmem_comm);
640 /* if (not is_contig || not is_homogeneous) {*/
641 /* if (rank != root) {*/
643 /* mpi_errno = MPIR_Unpack_impl(tmp_buf, nbytes, &position, buffer,*/
644 /* count, datatype);*/
648 /* We use Knomial for intra node */
649 MV2_Bcast_intra_node_function = &MPIR_Knomial_Bcast_intra_node_MV2;
650 /* if (mv2_enable_shmem_bcast == 0) {*/
651 /* Fall back to non-tuned version */
652 /* MPIR_Bcast_intra_MV2(buffer, count, datatype, root, comm);*/
654 mpi_errno = MV2_Bcast_function(buffer, count, datatype, root,
667 int Coll_reduce_mvapich2::reduce( void *sendbuf,
670 MPI_Datatype datatype,
671 MPI_Op op, int root, MPI_Comm comm)
673 if(mv2_reduce_thresholds_table == NULL)
674 init_mv2_reduce_tables_stampede();
676 int mpi_errno = MPI_SUCCESS;
678 int range_threshold = 0;
679 int range_intra_threshold = 0;
680 int is_commutative, pof2;
684 int is_two_level = 0;
686 comm_size = comm->size();
687 sendtype_size=datatype->size();
688 nbytes = count * sendtype_size;
693 is_commutative = (op==MPI_OP_NULL || op->is_commutative());
695 /* find nearest power-of-two less than or equal to comm_size */
696 for( pof2 = 1; pof2 <= comm_size; pof2 <<= 1 );
700 /* Search for the corresponding system size inside the tuning table */
701 while ((range < (mv2_size_reduce_tuning_table - 1)) &&
702 (comm_size > mv2_reduce_thresholds_table[range].numproc)) {
705 /* Search for corresponding inter-leader function */
706 while ((range_threshold < (mv2_reduce_thresholds_table[range].size_inter_table - 1))
708 mv2_reduce_thresholds_table[range].inter_leader[range_threshold].max)
709 && (mv2_reduce_thresholds_table[range].inter_leader[range_threshold].max !=
714 /* Search for corresponding intra node function */
715 while ((range_intra_threshold < (mv2_reduce_thresholds_table[range].size_intra_table - 1))
717 mv2_reduce_thresholds_table[range].intra_node[range_intra_threshold].max)
718 && (mv2_reduce_thresholds_table[range].intra_node[range_intra_threshold].max !=
720 range_intra_threshold++;
723 /* Set intra-node function pt for reduce_two_level */
724 MV2_Reduce_intra_function =
725 mv2_reduce_thresholds_table[range].intra_node[range_intra_threshold].
726 MV2_pt_Reduce_function;
727 /* Set inter-leader pt */
728 MV2_Reduce_function =
729 mv2_reduce_thresholds_table[range].inter_leader[range_threshold].
730 MV2_pt_Reduce_function;
732 if(mv2_reduce_intra_knomial_factor<0)
734 mv2_reduce_intra_knomial_factor = mv2_reduce_thresholds_table[range].intra_k_degree;
736 if(mv2_reduce_inter_knomial_factor<0)
738 mv2_reduce_inter_knomial_factor = mv2_reduce_thresholds_table[range].inter_k_degree;
740 if(mv2_reduce_thresholds_table[range].is_two_level_reduce[range_threshold] == 1){
743 /* We call Reduce function */
744 if(is_two_level == 1)
746 if (is_commutative == 1) {
747 if(comm->get_leaders_comm()==MPI_COMM_NULL){
750 mpi_errno = MPIR_Reduce_two_level_helper_MV2(sendbuf, recvbuf, count,
751 datatype, op, root, comm);
753 mpi_errno = MPIR_Reduce_binomial_MV2(sendbuf, recvbuf, count,
754 datatype, op, root, comm);
756 } else if(MV2_Reduce_function == &MPIR_Reduce_inter_knomial_wrapper_MV2 ){
757 if(is_commutative ==1)
759 mpi_errno = MV2_Reduce_function(sendbuf, recvbuf, count,
760 datatype, op, root, comm);
762 mpi_errno = MPIR_Reduce_binomial_MV2(sendbuf, recvbuf, count,
763 datatype, op, root, comm);
765 } else if(MV2_Reduce_function == &MPIR_Reduce_redscat_gather_MV2){
766 if (/*(HANDLE_GET_KIND(op) == HANDLE_KIND_BUILTIN) &&*/ (count >= pof2))
768 mpi_errno = MV2_Reduce_function(sendbuf, recvbuf, count,
769 datatype, op, root, comm);
771 mpi_errno = MPIR_Reduce_binomial_MV2(sendbuf, recvbuf, count,
772 datatype, op, root, comm);
775 mpi_errno = MV2_Reduce_function(sendbuf, recvbuf, count,
776 datatype, op, root, comm);
785 int Coll_reduce_scatter_mvapich2::reduce_scatter(void *sendbuf, void *recvbuf, int *recvcnts,
786 MPI_Datatype datatype, MPI_Op op,
789 int mpi_errno = MPI_SUCCESS;
790 int i = 0, comm_size = comm->size(), total_count = 0, type_size =
792 int is_commutative = 0;
793 int* disps = new int[comm_size];
795 if(mv2_red_scat_thresholds_table==NULL)
796 init_mv2_reduce_scatter_tables_stampede();
798 is_commutative=(op==MPI_OP_NULL || op->is_commutative());
799 for (i = 0; i < comm_size; i++) {
800 disps[i] = total_count;
801 total_count += recvcnts[i];
804 type_size=datatype->size();
805 nbytes = total_count * type_size;
807 if (is_commutative) {
809 int range_threshold = 0;
811 /* Search for the corresponding system size inside the tuning table */
812 while ((range < (mv2_size_red_scat_tuning_table - 1)) &&
813 (comm_size > mv2_red_scat_thresholds_table[range].numproc)) {
816 /* Search for corresponding inter-leader function */
817 while ((range_threshold < (mv2_red_scat_thresholds_table[range].size_inter_table - 1))
819 mv2_red_scat_thresholds_table[range].inter_leader[range_threshold].max)
820 && (mv2_red_scat_thresholds_table[range].inter_leader[range_threshold].max !=
825 /* Set inter-leader pt */
826 MV2_Red_scat_function =
827 mv2_red_scat_thresholds_table[range].inter_leader[range_threshold].
828 MV2_pt_Red_scat_function;
830 mpi_errno = MV2_Red_scat_function(sendbuf, recvbuf,
834 int is_block_regular = 1;
835 for (i = 0; i < (comm_size - 1); ++i) {
836 if (recvcnts[i] != recvcnts[i+1]) {
837 is_block_regular = 0;
842 while (pof2 < comm_size) pof2 <<= 1;
843 if (pof2 == comm_size && is_block_regular) {
844 /* noncommutative, pof2 size, and block regular */
845 MPIR_Reduce_scatter_non_comm_MV2(sendbuf, recvbuf,
849 mpi_errno = Coll_reduce_scatter_mpich_rdb::reduce_scatter(sendbuf, recvbuf,
860 int Coll_scatter_mvapich2::scatter(void *sendbuf,
862 MPI_Datatype sendtype,
865 MPI_Datatype recvtype,
866 int root, MPI_Comm comm)
868 int range = 0, range_threshold = 0, range_threshold_intra = 0;
869 int mpi_errno = MPI_SUCCESS;
870 // int mpi_errno_ret = MPI_SUCCESS;
871 int rank, nbytes, comm_size;
872 int partial_sub_ok = 0;
875 // MPID_Comm *shmem_commptr=NULL;
876 if(mv2_scatter_thresholds_table==NULL)
877 init_mv2_scatter_tables_stampede();
879 if(comm->get_leaders_comm()==MPI_COMM_NULL){
883 comm_size = comm->size();
888 int sendtype_size = sendtype->size();
889 nbytes = sendcnt * sendtype_size;
891 int recvtype_size = recvtype->size();
892 nbytes = recvcnt * recvtype_size;
895 // check if safe to use partial subscription mode
896 if (comm->is_uniform()) {
898 shmem_comm = comm->get_intra_comm();
899 int local_size = shmem_comm->size();
901 if (mv2_scatter_table_ppn_conf[0] == -1) {
902 // Indicating user defined tuning
906 if (local_size == mv2_scatter_table_ppn_conf[i]) {
912 } while(i < mv2_scatter_num_ppn_conf);
916 if (partial_sub_ok != 1) {
920 /* Search for the corresponding system size inside the tuning table */
921 while ((range < (mv2_size_scatter_tuning_table[conf_index] - 1)) &&
922 (comm_size > mv2_scatter_thresholds_table[conf_index][range].numproc)) {
925 /* Search for corresponding inter-leader function */
926 while ((range_threshold < (mv2_scatter_thresholds_table[conf_index][range].size_inter_table - 1))
928 mv2_scatter_thresholds_table[conf_index][range].inter_leader[range_threshold].max)
929 && (mv2_scatter_thresholds_table[conf_index][range].inter_leader[range_threshold].max != -1)) {
933 /* Search for corresponding intra-node function */
934 while ((range_threshold_intra <
935 (mv2_scatter_thresholds_table[conf_index][range].size_intra_table - 1))
937 mv2_scatter_thresholds_table[conf_index][range].intra_node[range_threshold_intra].max)
938 && (mv2_scatter_thresholds_table[conf_index][range].intra_node[range_threshold_intra].max !=
940 range_threshold_intra++;
943 MV2_Scatter_function = mv2_scatter_thresholds_table[conf_index][range].inter_leader[range_threshold]
944 .MV2_pt_Scatter_function;
946 if(MV2_Scatter_function == &MPIR_Scatter_mcst_wrap_MV2) {
947 #if defined(_MCST_SUPPORT_)
948 if(comm->ch.is_mcast_ok == 1
949 && mv2_use_mcast_scatter == 1
950 && comm->ch.shmem_coll_ok == 1) {
951 MV2_Scatter_function = &MPIR_Scatter_mcst_MV2;
953 #endif /*#if defined(_MCST_SUPPORT_) */
955 if(mv2_scatter_thresholds_table[conf_index][range].inter_leader[range_threshold + 1].
956 MV2_pt_Scatter_function != NULL) {
957 MV2_Scatter_function = mv2_scatter_thresholds_table[conf_index][range].inter_leader[range_threshold + 1]
958 .MV2_pt_Scatter_function;
961 MV2_Scatter_function = &MPIR_Scatter_MV2_Binomial;
966 if( (MV2_Scatter_function == &MPIR_Scatter_MV2_two_level_Direct) ||
967 (MV2_Scatter_function == &MPIR_Scatter_MV2_two_level_Binomial)) {
968 if( comm->is_blocked()) {
969 MV2_Scatter_intra_function = mv2_scatter_thresholds_table[conf_index][range].intra_node[range_threshold_intra]
970 .MV2_pt_Scatter_function;
973 MV2_Scatter_function(sendbuf, sendcnt, sendtype,
974 recvbuf, recvcnt, recvtype, root,
977 mpi_errno = MPIR_Scatter_MV2_Binomial(sendbuf, sendcnt, sendtype,
978 recvbuf, recvcnt, recvtype, root,
983 mpi_errno = MV2_Scatter_function(sendbuf, sendcnt, sendtype,
984 recvbuf, recvcnt, recvtype, root,
993 void smpi_coll_cleanup_mvapich2()
995 if (mv2_alltoall_thresholds_table)
996 delete[] mv2_alltoall_thresholds_table[0];
997 delete[] mv2_alltoall_thresholds_table;
998 delete[] mv2_size_alltoall_tuning_table;
999 delete[] mv2_alltoall_table_ppn_conf;
1001 delete[] mv2_gather_thresholds_table;
1002 if (mv2_allgather_thresholds_table)
1003 delete[] mv2_allgather_thresholds_table[0];
1004 delete[] mv2_size_allgather_tuning_table;
1005 delete[] mv2_allgather_table_ppn_conf;
1006 delete[] mv2_allgather_thresholds_table;
1008 delete[] mv2_allgatherv_thresholds_table;
1009 delete[] mv2_reduce_thresholds_table;
1010 delete[] mv2_red_scat_thresholds_table;
1011 delete[] mv2_allreduce_thresholds_table;
1012 delete[] mv2_bcast_thresholds_table;
1013 if (mv2_scatter_thresholds_table)
1014 delete[] mv2_scatter_thresholds_table[0];
1015 delete[] mv2_scatter_thresholds_table;
1016 delete[] mv2_size_scatter_tuning_table;
1017 delete[] mv2_scatter_table_ppn_conf;