1 | #include "ep_lib.hpp" |
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2 | #include <mpi.h> |
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3 | #include "ep_declaration.hpp" |
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4 | |
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5 | using namespace std; |
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6 | |
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7 | namespace ep_lib |
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8 | { |
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9 | int MPI_Intercomm_create(MPI_Comm local_comm, int local_leader, MPI_Comm peer_comm, int remote_leader, int tag, MPI_Comm *newintercomm) |
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10 | { |
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11 | assert(local_comm.is_ep); |
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12 | |
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13 | int ep_rank, ep_rank_loc, mpi_rank; |
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14 | int ep_size, num_ep, mpi_size; |
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15 | |
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16 | ep_rank = local_comm.ep_comm_ptr->size_rank_info[0].first; |
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17 | ep_rank_loc = local_comm.ep_comm_ptr->size_rank_info[1].first; |
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18 | mpi_rank = local_comm.ep_comm_ptr->size_rank_info[2].first; |
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19 | ep_size = local_comm.ep_comm_ptr->size_rank_info[0].second; |
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20 | num_ep = local_comm.ep_comm_ptr->size_rank_info[1].second; |
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21 | mpi_size = local_comm.ep_comm_ptr->size_rank_info[2].second; |
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22 | |
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23 | |
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24 | MPI_Barrier(local_comm); |
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25 | |
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26 | |
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27 | |
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28 | int leader_ranks[6]; //! 0: rank in world, 1: mpi_size, 2: rank_in_peer. |
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29 | //! 3, 4, 5 : remote |
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30 | |
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31 | bool is_decider = false; |
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32 | |
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33 | |
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34 | if(ep_rank == local_leader) |
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35 | { |
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36 | MPI_Comm_rank(MPI_COMM_WORLD, &leader_ranks[0]); |
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37 | |
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38 | leader_ranks[1] = mpi_size; |
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39 | MPI_Comm_rank(peer_comm, &leader_ranks[2]); |
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40 | |
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41 | //printf("leader_ranks = %d, %d, %d\n", leader_ranks[0], leader_ranks[1], leader_ranks[2]); |
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42 | MPI_Request request[2]; |
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43 | MPI_Status status[2]; |
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44 | |
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45 | MPI_Isend(&leader_ranks[0], 3, static_cast< ::MPI_Datatype>(MPI_INT), remote_leader, tag, peer_comm, &request[0]); |
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46 | MPI_Irecv(&leader_ranks[3], 3, static_cast< ::MPI_Datatype>(MPI_INT), remote_leader, tag, peer_comm, &request[1]); |
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47 | |
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48 | MPI_Waitall(2, request, status); |
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49 | |
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50 | //MPI_Send(&leader_ranks[0], 3, static_cast< ::MPI_Datatype>(MPI_INT), remote_leader, tag, peer_comm); |
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51 | //MPI_Recv(&leader_ranks[3], 3, static_cast< ::MPI_Datatype>(MPI_INT), remote_leader, tag, peer_comm, &status[1]); |
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52 | } |
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53 | |
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54 | |
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55 | MPI_Bcast(leader_ranks, 6, static_cast< ::MPI_Datatype>(MPI_INT), local_leader, local_comm); |
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56 | |
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57 | |
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58 | MPI_Barrier(local_comm); |
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59 | |
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60 | |
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61 | if(leader_ranks[0] == leader_ranks[3]) |
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62 | { |
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63 | if( leader_ranks[1] * leader_ranks[4] == 1) |
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64 | { |
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65 | if(ep_rank == local_leader) Debug("calling MPI_Intercomm_create_unique_leader\n"); |
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66 | local_comm.ep_comm_ptr->comm_label = -99; |
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67 | |
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68 | return MPI_Intercomm_create_unique_leader(local_comm, local_leader, peer_comm, remote_leader, tag, newintercomm); |
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69 | } |
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70 | else // leader_ranks[1] * leader_ranks[4] != 1 |
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71 | { |
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72 | // change leader |
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73 | int new_local_leader; |
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74 | |
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75 | if(leader_ranks[2] < leader_ranks[5]) |
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76 | { |
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77 | if(leader_ranks[1] > 1) //! change leader |
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78 | { |
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79 | // change leader |
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80 | is_decider = true; |
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81 | int target = local_comm.rank_map->at(local_leader).second; |
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82 | { |
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83 | for(int i=0; i<ep_size; i++) |
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84 | { |
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85 | if(local_comm.rank_map->at(i).second != target && local_comm.rank_map->at(i).first == 0) |
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86 | { |
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87 | new_local_leader = i; |
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88 | break; |
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89 | } |
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90 | } |
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91 | } |
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92 | } |
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93 | else |
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94 | { |
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95 | new_local_leader = local_leader; |
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96 | } |
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97 | } |
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98 | else |
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99 | { |
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100 | if(leader_ranks[4] == 1) |
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101 | { |
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102 | // change leader |
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103 | is_decider = true; |
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104 | int target = local_comm.rank_map->at(local_leader).second; |
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105 | { |
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106 | for(int i=0; i<ep_size; i++) |
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107 | { |
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108 | if(local_comm.rank_map->at(i).second != target && local_comm.rank_map->at(i).first == 0) |
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109 | { |
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110 | new_local_leader = i; |
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111 | break; |
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112 | } |
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113 | } |
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114 | } |
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115 | } |
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116 | else |
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117 | { |
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118 | new_local_leader = local_leader; |
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119 | } |
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120 | } |
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121 | |
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122 | |
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123 | int new_tag_in_world; |
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124 | |
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125 | int leader_in_world[2]; |
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126 | |
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127 | |
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128 | if(is_decider) |
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129 | { |
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130 | if(ep_rank == new_local_leader) |
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131 | { |
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132 | new_tag_in_world = TAG++; |
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133 | } |
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134 | MPI_Bcast(&new_tag_in_world, 1, static_cast< ::MPI_Datatype> (MPI_INT), new_local_leader, local_comm); |
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135 | if(ep_rank == local_leader) MPI_Send(&new_tag_in_world, 1, static_cast< ::MPI_Datatype> (MPI_INT), remote_leader, tag, peer_comm); |
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136 | } |
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137 | else |
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138 | { |
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139 | if(ep_rank == local_leader) |
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140 | { |
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141 | MPI_Status status; |
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142 | MPI_Recv(&new_tag_in_world, 1, static_cast< ::MPI_Datatype> (MPI_INT), remote_leader, tag, peer_comm, &status); |
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143 | } |
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144 | MPI_Bcast(&new_tag_in_world, 1, static_cast< ::MPI_Datatype> (MPI_INT), new_local_leader, local_comm); |
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145 | } |
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146 | |
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147 | |
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148 | if(ep_rank == new_local_leader) |
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149 | { |
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150 | ::MPI_Comm_rank(static_cast< ::MPI_Comm >(MPI_COMM_WORLD.mpi_comm), &leader_in_world[0]); |
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151 | } |
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152 | |
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153 | MPI_Bcast(&leader_in_world[0], 1, static_cast< ::MPI_Datatype> (MPI_INT), new_local_leader, local_comm); |
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154 | |
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155 | |
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156 | if(ep_rank == local_leader) |
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157 | { |
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158 | MPI_Request request[2]; |
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159 | MPI_Status status[2]; |
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160 | |
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161 | MPI_Isend(&leader_in_world[0], 1, static_cast< ::MPI_Datatype> (MPI_INT), remote_leader, tag, peer_comm, &request[0]); |
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162 | MPI_Irecv(&leader_in_world[1], 1, static_cast< ::MPI_Datatype> (MPI_INT), remote_leader, tag, peer_comm, &request[1]); |
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163 | |
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164 | MPI_Waitall(2, request, status); |
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165 | } |
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166 | |
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167 | MPI_Bcast(&leader_in_world[1], 1, MPI_INT, local_leader, local_comm); |
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168 | |
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169 | local_comm.ep_comm_ptr->comm_label = tag; |
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170 | |
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171 | if(ep_rank == local_leader) Debug("calling MPI_Intercomm_create_from_world\n"); |
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172 | |
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173 | return MPI_Intercomm_create_from_world(local_comm, new_local_leader, static_cast< ::MPI_Comm >(MPI_COMM_WORLD.mpi_comm), leader_in_world[1], new_tag_in_world, newintercomm); |
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174 | |
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175 | } |
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176 | } |
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177 | |
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178 | if(ep_rank == local_leader) Debug("calling MPI_Intercomm_create_kernel\n"); |
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179 | |
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180 | return MPI_Intercomm_create_kernel(local_comm, local_leader, peer_comm, remote_leader, tag, newintercomm); |
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181 | |
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182 | } |
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183 | |
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184 | int MPI_Comm_test_inter(MPI_Comm comm, int *flag) |
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185 | { |
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186 | *flag = false; |
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187 | if(comm.is_ep) |
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188 | { |
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189 | *flag = comm.is_intercomm; |
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190 | return 0; |
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191 | } |
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192 | else if(comm.mpi_comm != static_cast< ::MPI_Comm>(MPI_COMM_NULL.mpi_comm)) |
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193 | { |
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194 | ::MPI_Comm mpi_comm = static_cast< ::MPI_Comm> (comm.mpi_comm); |
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195 | |
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196 | ::MPI_Comm_test_inter(mpi_comm, flag); |
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197 | return 0; |
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198 | } |
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199 | return 0; |
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200 | } |
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201 | |
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202 | |
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203 | } |
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