1 #include "colls_private.h"
2 //#include <star-reduction.c>
4 /* change number of core per smp-node
5 we assume that number of core per process will be the same for all implementations */
11 This fucntion performs all-reduce operation as follow.
12 1) binomial_tree reduce inside each SMP node
13 2) reduce-scatter -inter between root of each SMP node
14 3) allgather - inter between root of each SMP node
15 4) binomial_tree bcast inside each SMP node
17 int smpi_coll_tuned_allreduce_smp_rsag_lr(void *send_buf, void *recv_buf,
18 int count, MPI_Datatype dtype,
19 MPI_Op op, MPI_Comm comm)
23 int tag = COLL_TAG_ALLREDUCE;
26 int num_core = simcall_host_get_core(SIMIX_host_self());
27 // do we use the default one or the number of cores in the platform ?
28 // if the number of cores is one, the platform may be simulated with 1 node = 1 core
29 if (num_core == 1) num_core = NUM_CORE;
31 #ifdef MPICH2_REDUCTION
32 MPI_User_function * uop = MPIR_Op_table[op % 16 - 1];
34 MPI_User_function *uop;
35 struct MPIR_OP *op_ptr;
36 op_ptr = MPIR_ToPointer(op);
40 comm_size = smpi_comm_size(comm);
41 rank = smpi_comm_rank(comm);
43 extent = smpi_datatype_get_extent(dtype);
44 tmp_buf = (void *) xbt_malloc(count * extent);
46 int intra_rank, inter_rank;
47 intra_rank = rank % num_core;
48 inter_rank = rank / num_core;
50 //printf("node %d intra_rank = %d, inter_rank = %d\n", rank, intra_rank, inter_rank);
52 int inter_comm_size = (comm_size + num_core - 1) / num_core;
55 //printf("intra com size = %d\n",num_core);
56 //printf("inter com size = %d\n",inter_comm_size);
60 smpi_mpi_sendrecv(send_buf, count, dtype, rank, tag,
61 recv_buf, count, dtype, rank, tag, comm, &status);
64 // SMP_binomial_reduce
66 while (mask < num_core) {
67 if ((mask & intra_rank) == 0) {
68 src = (inter_rank * num_core) + (intra_rank | mask);
69 // if (src < ((inter_rank + 1) * num_core)) {
70 if (src < comm_size) {
71 smpi_mpi_recv(tmp_buf, count, dtype, src, tag, comm, &status);
72 smpi_op_apply(op, tmp_buf, recv_buf, &count, &dtype);
73 //printf("Node %d recv from node %d when mask is %d\n", rank, src, mask);
77 dst = (inter_rank * num_core) + (intra_rank & (~mask));
78 smpi_mpi_send(recv_buf, count, dtype, dst, tag, comm);
79 //printf("Node %d send to node %d when mask is %d\n", rank, dst, mask);
87 // INTER: reduce-scatter
88 if (intra_rank == 0) {
89 int send_offset, recv_offset;
90 int send_count, recv_count;
91 int curr_size = count / inter_comm_size;
92 int curr_remainder = count % inter_comm_size;
94 int to = ((inter_rank + 1) % inter_comm_size) * num_core;
96 ((inter_rank + inter_comm_size - 1) % inter_comm_size) * num_core;
99 //printf("node %d to %d from %d\n",rank,to,from);
101 /* last segment may have a larger size since it also include the remainder */
102 int last_segment_ptr =
103 (inter_comm_size - 1) * (count / inter_comm_size) * extent;
105 for (i = 0; i < (inter_comm_size - 1); i++) {
108 ((inter_rank - 1 - i +
109 inter_comm_size) % inter_comm_size) * curr_size * extent;
111 ((inter_rank - 2 - i +
112 inter_comm_size) % inter_comm_size) * curr_size * extent;
115 if (send_offset != last_segment_ptr)
116 send_count = curr_size;
118 send_count = curr_size + curr_remainder;
120 if (recv_offset != last_segment_ptr)
121 recv_count = curr_size;
123 recv_count = curr_size + curr_remainder;
125 smpi_mpi_sendrecv((char *) recv_buf + send_offset, send_count, dtype, to,
126 tag + i, tmp_buf, recv_count, dtype, from, tag + i, comm,
130 smpi_op_apply(op, tmp_buf, (char *) recv_buf + recv_offset, &recv_count,
135 for (i = 0; i < (inter_comm_size - 1); i++) {
139 inter_comm_size) % inter_comm_size) * curr_size * extent;
141 ((inter_rank - 1 - i +
142 inter_comm_size) % inter_comm_size) * curr_size * extent;
145 if (send_offset != last_segment_ptr)
146 send_count = curr_size;
148 send_count = curr_size + curr_remainder;
150 if (recv_offset != last_segment_ptr)
151 recv_count = curr_size;
153 recv_count = curr_size + curr_remainder;
155 smpi_mpi_sendrecv((char *) recv_buf + send_offset, send_count, dtype, to,
156 tag + i, (char *) recv_buf + recv_offset, recv_count, dtype,
157 from, tag + i, comm, &status);
165 // INTER_binomial_reduce
167 // only root node for each SMP
168 if (intra_rank == 0) {
171 while (mask < inter_comm_size) {
172 if ((mask & inter_rank) == 0) {
173 src = (inter_rank | mask) * num_core;
174 if (src < comm_size) {
175 smpi_mpi_recv(tmp_buf, count, dtype, src, tag, comm, &status);
176 (* uop) (tmp_buf, recv_buf, &count, &dtype);
177 //printf("Node %d recv from node %d when mask is %d\n", rank, src, mask);
181 dst = (inter_rank & (~mask)) * num_core;
182 smpi_mpi_send(recv_buf, count, dtype, dst, tag, comm);
183 //printf("Node %d send to node %d when mask is %d\n", rank, dst, mask);
192 // INTER_binomial_bcast
195 if (intra_rank == 0) {
197 while (mask < inter_comm_size) {
198 if (inter_rank & mask) {
199 src = (inter_rank - mask) * num_core;
200 //printf("Node %d recv from node %d when mask is %d\n", rank, src, mask);
201 smpi_mpi_recv(recv_buf, count, dtype, src, tag, comm, &status);
208 //printf("My rank = %d my mask = %d\n", rank,mask);
211 if (inter_rank < inter_comm_size) {
212 dst = (inter_rank + mask) * num_core;
213 if (dst < comm_size) {
214 //printf("Node %d send to node %d when mask is %d\n", rank, dst, mask);
215 smpi_mpi_send(recv_buf, count, dtype, dst, tag, comm);
224 // INTRA_binomial_bcast
226 int num_core_in_current_smp = num_core;
227 if (inter_rank == (inter_comm_size - 1)) {
228 num_core_in_current_smp = comm_size - (inter_rank * num_core);
230 // printf("Node %d num_core = %d\n",rank, num_core_in_current_smp);
232 while (mask < num_core_in_current_smp) {
233 if (intra_rank & mask) {
234 src = (inter_rank * num_core) + (intra_rank - mask);
235 //printf("Node %d recv from node %d when mask is %d\n", rank, src, mask);
236 smpi_mpi_recv(recv_buf, count, dtype, src, tag, comm, &status);
243 //printf("My rank = %d my mask = %d\n", rank,mask);
246 dst = (inter_rank * num_core) + (intra_rank + mask);
247 if (dst < comm_size) {
248 //printf("Node %d send to node %d when mask is %d\n", rank, dst, mask);
249 smpi_mpi_send(recv_buf, count, dtype, dst, tag, comm);