source: XIOS/dev/branch_openmp/extern/ep_dev/ep_intercomm_unique.cpp @ 1527

Last change on this file since 1527 was 1527, checked in by yushan, 6 years ago

save dev

File size: 6.8 KB
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1#include "ep_lib.hpp"
2#include <mpi.h>
3#include "ep_declaration.hpp"
4#include "ep_mpi.hpp"
5
6using namespace std;
7
8
9namespace ep_lib
10{
11
12/*
13  int MPI_Intercomm_create_unique_leader(MPI_Comm local_comm, int local_leader, MPI_Comm peer_comm, int remote_leader, int tag, MPI_Comm *newintercomm)
14  {
15    //! mpi_size of local comm = 1
16    //! same world rank of leaders
17
18    int ep_rank, ep_rank_loc, mpi_rank;
19    int ep_size, num_ep, mpi_size;
20
21    ep_rank = local_comm->ep_comm_ptr->size_rank_info[0].first;
22    ep_rank_loc = local_comm->ep_comm_ptr->size_rank_info[1].first;
23    mpi_rank = local_comm->ep_comm_ptr->size_rank_info[2].first;
24    ep_size = local_comm->ep_comm_ptr->size_rank_info[0].second;
25    num_ep = local_comm->ep_comm_ptr->size_rank_info[1].second;
26    mpi_size = local_comm->ep_comm_ptr->size_rank_info[2].second;
27
28
29
30    std::vector<int> rank_info[4];  //! 0->rank_in_world of local_comm,  1->rank_in_local_parent of local_comm
31                                    //! 2->rank_in_world of remote_comm, 3->rank_in_local_parent of remote_comm
32
33    int rank_in_world;
34
35    int rank_in_peer_mpi[2];
36
37    ::MPI_Comm_rank(to_mpi_comm(MPI_COMM_WORLD->mpi_comm), &rank_in_world);
38
39
40    int local_num_ep = num_ep;
41    int remote_num_ep;
42    int total_num_ep;
43
44    int leader_rank_in_peer[2];
45
46    int my_position;
47    int tag_label[2];
48
49    vector<int> send_buf(4);
50    vector<int> recv_buf(4);
51
52
53    if(ep_rank == local_leader)
54    {
55      MPI_Status status;
56
57
58
59      MPI_Comm_rank(peer_comm, &leader_rank_in_peer[0]);
60
61      send_buf[0] = local_num_ep;
62      send_buf[1] = leader_rank_in_peer[0];
63
64      MPI_Request req_s, req_r;
65
66      MPI_Isend(send_buf.data(), 2, MPI_INT, remote_leader, tag, peer_comm, &req_s);
67      MPI_Irecv(recv_buf.data(), 2, MPI_INT, remote_leader, tag, peer_comm, &req_r);
68
69
70      MPI_Wait(&req_s, &status);
71      MPI_Wait(&req_r, &status);
72
73      recv_buf[2] = leader_rank_in_peer[0];
74
75    }
76
77    MPI_Bcast(recv_buf.data(), 3, MPI_INT, local_leader, local_comm);
78
79    remote_num_ep = recv_buf[0];
80    leader_rank_in_peer[1] = recv_buf[1];
81    leader_rank_in_peer[0] = recv_buf[2];
82
83    total_num_ep = local_num_ep + remote_num_ep;
84
85
86    if(leader_rank_in_peer[0] < leader_rank_in_peer[1])
87    {
88      my_position = ep_rank_loc;
89      //! LEADER create EP
90      if(ep_rank == local_leader)
91      {
92        ::MPI_Comm *mpi_dup = new ::MPI_Comm;
93       
94        ::MPI_Comm_dup(to_mpi_comm(local_comm->mpi_comm), mpi_dup);
95
96        MPI_Comm *ep_intercomm;
97        MPI_Info info;
98        MPI_Comm_create_endpoints(mpi_dup, total_num_ep, info, ep_intercomm);
99
100
101        for(int i=0; i<total_num_ep; i++)
102        {
103          ep_intercomm[i]->is_intercomm = true;
104          ep_intercomm[i]->ep_comm_ptr->intercomm = new ep_lib::ep_intercomm;
105          ep_intercomm[i]->ep_comm_ptr->intercomm->mpi_inter_comm = 0;
106
107          ep_intercomm[i]->ep_comm_ptr->comm_label = leader_rank_in_peer[0];
108        }
109
110        tag_label[0] = TAG++;
111        tag_label[1] = rank_in_world;
112
113        #pragma omp critical (write_to_tag_list)
114        tag_list.push_back(make_pair( make_pair(tag_label[0], tag_label[1]) , ep_intercomm));
115
116        MPI_Request req_s;
117        MPI_Status sta_s;
118        MPI_Isend(tag_label, 2, MPI_INT, remote_leader, tag, peer_comm, &req_s);
119
120        MPI_Wait(&req_s, &sta_s);
121
122      }
123    }
124    else
125    {
126      //! Wait for EP creation
127      my_position = remote_num_ep + ep_rank_loc;
128      if(ep_rank == local_leader)
129      {
130        MPI_Status status;
131        MPI_Request req_r;
132        MPI_Irecv(tag_label, 2, MPI_INT, remote_leader, tag, peer_comm, &req_r);
133        MPI_Wait(&req_r, &status);
134      }
135    }
136
137    MPI_Bcast(tag_label, 2, MPI_INT, local_leader, local_comm);
138
139
140
141
142    #pragma omp critical (read_from_tag_list)
143    {
144      bool found = false;
145      while(!found)
146      {
147        for(std::list<std::pair < std::pair<int,int>, MPI_Comm* > >::iterator iter = tag_list.begin(); iter!=tag_list.end(); iter++)
148        {
149          if((*iter).first == make_pair(tag_label[0], tag_label[1]))
150          {
151            *newintercomm =  iter->second[my_position];
152            found = true;
153            // tag_list.erase(iter);
154            break;
155          }
156        }
157      }
158    }
159
160    MPI_Barrier_local(local_comm);
161
162    if(leader_rank_in_peer[0] < leader_rank_in_peer[1])
163    {
164      for(std::list<std::pair < std::pair<int,int>, MPI_Comm* > >::iterator iter = tag_list.begin(); iter!=tag_list.end(); iter++)
165        {
166          if((*iter).first == make_pair(tag_label[0], tag_label[1]))
167          {
168            tag_list.erase(iter);
169            break;
170          }
171        }
172    }
173
174
175
176    int intercomm_ep_rank, intercomm_ep_rank_loc, intercomm_mpi_rank;
177    int intercomm_ep_size, intercomm_num_ep, intercomm_mpi_size;
178
179    intercomm_ep_rank = (*newintercomm)->ep_comm_ptr->size_rank_info[0].first;
180    intercomm_ep_rank_loc = (*newintercomm)->ep_comm_ptr->size_rank_info[1].first;
181    intercomm_mpi_rank = (*newintercomm)->ep_comm_ptr->size_rank_info[2].first;
182    intercomm_ep_size = (*newintercomm)->ep_comm_ptr->size_rank_info[0].second;
183    intercomm_num_ep = (*newintercomm)->ep_comm_ptr->size_rank_info[1].second;
184    intercomm_mpi_size = (*newintercomm)->ep_comm_ptr->size_rank_info[2].second;
185
186
187
188    (*newintercomm)->ep_comm_ptr->intercomm->loc_rank_map  = new RANK_MAP;
189    (*newintercomm)->ep_comm_ptr->intercomm->remote_rank_map = new RANK_MAP;
190    (*newintercomm)->ep_comm_ptr->intercomm->loc_rank_map->resize(local_num_ep);
191    (*newintercomm)->ep_comm_ptr->intercomm->remote_rank_map->resize(remote_num_ep);
192
193    (*newintercomm)->ep_comm_ptr->intercomm->size_rank_info[0] = local_comm->ep_comm_ptr->size_rank_info[0];
194    (*newintercomm)->ep_comm_ptr->intercomm->size_rank_info[1] = local_comm->ep_comm_ptr->size_rank_info[1];
195    (*newintercomm)->ep_comm_ptr->intercomm->size_rank_info[2] = local_comm->ep_comm_ptr->size_rank_info[2];
196
197
198
199    int local_rank_map_ele[2];
200    local_rank_map_ele[0] = intercomm_ep_rank;
201    local_rank_map_ele[1] = (*newintercomm)->ep_comm_ptr->comm_label;
202
203    MPI_Allgather(local_rank_map_ele, 2, MPI_INT,
204      (*newintercomm)->ep_comm_ptr->intercomm->loc_rank_map->data(), 2, MPI_INT, local_comm);
205
206    if(ep_rank == local_leader)
207    {
208      MPI_Status status;
209      MPI_Request req_s, req_r;
210
211      MPI_Isend((*newintercomm)->ep_comm_ptr->intercomm->loc_rank_map->data(), 2*local_num_ep, MPI_INT, remote_leader, tag, peer_comm, &req_s);
212      MPI_Irecv((*newintercomm)->ep_comm_ptr->intercomm->remote_rank_map->data(), 2*remote_num_ep, MPI_INT, remote_leader, tag, peer_comm, &req_r);
213
214
215      MPI_Wait(&req_s, &status);
216      MPI_Wait(&req_r, &status);
217
218    }
219
220    MPI_Bcast((*newintercomm)->ep_comm_ptr->intercomm->remote_rank_map->data(), 2*remote_num_ep, MPI_INT, local_leader, local_comm);
221    //(*newintercomm)->ep_comm_ptr->intercomm->local_comm = (local_comm->ep_comm_ptr->comm_list[ep_rank_loc]);
222    (*newintercomm)->ep_comm_ptr->intercomm->intercomm_tag = tag;
223
224
225    return MPI_SUCCESS;
226  }
227*/
228}
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