1 | /* ************************************************************************** * |
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2 | * Copyright © IPSL/LSCE, XMLIOServer, Avril 2010 - Octobre 2011 * |
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3 | * ************************************************************************** */ |
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4 | |
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5 | /** |
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6 | * \file mpi_interface.cpp |
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7 | * \brief Gestion des communications MPI via une surcouche interne (implémentation). |
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8 | * \author Hervé Ozdoba |
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9 | * \version 0.4 |
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10 | * \date 28 Juin 2011 |
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11 | */ |
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12 | |
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13 | // XMLIOServer headers |
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14 | #include "mpi_manager.hpp" |
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15 | |
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16 | |
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17 | // /////////////////////////////// Définitions ////////////////////////////// // |
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18 | |
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19 | namespace xmlioserver { |
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20 | namespace comm { |
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21 | |
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22 | // ---------------------- Initialisation & Finalisation --------------------- |
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23 | |
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24 | void CMPIManager::Initialise(int * _argc, char *** _argv) |
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25 | { |
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26 | int flag = 0; |
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27 | if (MPI_Initialized(&flag) != MPI_SUCCESS) |
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28 | ERROR("CMPIManager::Initialise(arc, argv)", << " MPI Error !"); |
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29 | if (!flag) |
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30 | { |
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31 | if (MPI_Init(_argc, _argv) != MPI_SUCCESS) |
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32 | ERROR("CMPIManager::Initialise(arc, argv)", << " MPI Error !"); |
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33 | } |
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34 | |
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35 | } |
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36 | |
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37 | void CMPIManager::Finalize(void) |
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38 | { |
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39 | if (MPI_Finalize() != MPI_SUCCESS) |
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40 | ERROR("CMPIManager::Finalize(void)", << " MPI Error !"); |
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41 | } |
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42 | |
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43 | // ------------------------------ Communicateurs ---------------------------- |
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44 | |
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45 | int CMPIManager::GetCommRank(MPI_Comm _comm) |
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46 | { |
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47 | int rank = 0; |
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48 | if (MPI_Comm_rank(_comm, &rank) != MPI_SUCCESS) |
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49 | ERROR("CMPIManager::GetCommRank(comm)", << " MPI Error !"); |
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50 | return (rank); |
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51 | } |
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52 | |
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53 | int CMPIManager::GetCommSize(MPI_Comm _comm) |
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54 | { |
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55 | int size = 0; |
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56 | if (MPI_Comm_size(_comm, &size) != MPI_SUCCESS) |
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57 | ERROR("CMPIManager::GetCommSize(comm)", << " MPI Error !"); |
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58 | return (size); |
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59 | } |
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60 | |
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61 | MPI_Comm CMPIManager::CreateComm(MPI_Group _group, MPI_Comm _pcomm) |
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62 | { |
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63 | MPI_Comm commu; |
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64 | if (MPI_Comm_create(_pcomm, _group, &commu) != MPI_SUCCESS) |
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65 | ERROR("CMPIManager::CreateComm(group, pcomm)", << " MPI Error !"); |
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66 | return (commu); |
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67 | } |
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68 | |
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69 | //MPI_Comm CMPIManager::GetCommWorld(void) |
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70 | //{ |
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71 | // return (MPI_COMM_WORLD); |
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72 | //} |
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73 | |
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74 | // ---------------------------------- Autre --------------------------------- |
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75 | |
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76 | void CMPIManager::Barrier(MPI_Comm _comm) |
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77 | { |
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78 | if (MPI_Barrier(_comm) != MPI_SUCCESS) |
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79 | ERROR("CMPIManager::Barrier(comm)", << " MPI Error !"); |
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80 | } |
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81 | |
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82 | bool CMPIManager::DispatchClient(bool _is_server, |
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83 | MPI_Comm & _comm_client, |
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84 | MPI_Comm & _comm_client_server, |
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85 | MPI_Comm & _comm_server, |
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86 | MPI_Comm _comm_parent) |
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87 | { |
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88 | int value = (_is_server) ? 1 : 2; |
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89 | std::size_t nbClient = 0, nbServer = 0, nbClientByServer = 0; |
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90 | std::vector<int> info, rank_client, rank_server; |
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91 | CMPIManager::AllGather(value, info, _comm_parent); |
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92 | |
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93 | for (std::size_t s = 0; s < info.size(); s++) |
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94 | { |
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95 | if (info[s] == 1) rank_server.push_back(s); |
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96 | else rank_client.push_back(s); |
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97 | } |
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98 | nbClient = rank_client.size(); |
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99 | nbServer = rank_server.size(); |
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100 | |
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101 | if (nbClient == 0) |
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102 | ERROR("CMPIManager::DispatchClient()", << " Aucun client disponible !"); |
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103 | |
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104 | |
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105 | _comm_client = CMPIManager::CreateComm(CMPIManager::CreateSubGroup( |
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106 | CMPIManager::GetGroupWorld(), rank_client), _comm_parent); |
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107 | |
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108 | if (nbServer != 0) |
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109 | { |
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110 | std::size_t currentServer = 0; |
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111 | nbClientByServer = nbClient/nbServer; |
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112 | _comm_server = CMPIManager::CreateComm(CMPIManager::CreateSubGroup( |
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113 | CMPIManager::GetGroupWorld(), rank_server), _comm_parent); |
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114 | |
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115 | //std::cout << nbClient << "," << nbServer << "," << nbClientByServer << std::endl; |
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116 | |
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117 | for (std::size_t mm = 0; mm < nbClient; mm += nbClientByServer) |
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118 | { |
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119 | std::vector<int> group_rank; |
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120 | group_rank.push_back(rank_server[currentServer++]); |
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121 | for (std::size_t nn = 0; nn < nbClientByServer; nn++) |
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122 | group_rank.push_back(rank_client[nn+mm]); |
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123 | MPI_Comm comm_client_server_ = CMPIManager::CreateComm(CMPIManager::CreateSubGroup( |
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124 | CMPIManager::GetGroupWorld(), group_rank), _comm_parent); |
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125 | |
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126 | if (std::find(group_rank.begin(), group_rank.end(), |
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127 | CMPIManager::GetCommRank(_comm_parent)) != group_rank.end()) |
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128 | { |
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129 | _comm_client_server = comm_client_server_; |
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130 | } |
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131 | |
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132 | group_rank.clear(); |
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133 | } |
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134 | return (true); |
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135 | } |
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136 | else |
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137 | { |
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138 | _comm_server = _comm_client; |
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139 | return (false); |
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140 | } |
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141 | } |
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142 | |
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143 | |
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144 | // --------------------------------- Groupes -------------------------------- |
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145 | |
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146 | MPI_Group CMPIManager::GetGroupWorld(void) |
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147 | { |
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148 | MPI_Group group = 0; |
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149 | if (MPI_Comm_group(MPI_COMM_WORLD, &group) != MPI_SUCCESS) |
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150 | ERROR("CMPIManager::GetGroupWorld()", << " MPI Error !"); |
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151 | return (group); |
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152 | } |
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153 | |
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154 | MPI_Group CMPIManager::CreateSubGroup(MPI_Group _pgroup, const std::vector<int> & _ranks) |
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155 | { |
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156 | MPI_Group group = 0; |
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157 | if (MPI_Group_incl(_pgroup, _ranks.size(), const_cast<int*>(&(_ranks[0])), &group) != MPI_SUCCESS) |
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158 | ERROR("CMPIManager::CreateSubGroup(pgroup, ranks)", << " MPI Error !"); |
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159 | return (group); |
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160 | } |
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161 | |
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162 | MPI_Group CMPIManager::CreateSubGroup |
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163 | (MPI_Group _pgroup, int _min_rank, int _max_rank, int _intval) |
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164 | { |
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165 | std::vector<int> ranks; |
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166 | for (int i = _min_rank; i <= _max_rank; i += _intval) |
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167 | ranks.push_back(i); |
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168 | return (CMPIManager::CreateSubGroup(_pgroup, ranks)); |
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169 | } |
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170 | |
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171 | // ----------------------------------- Tests -------------------------------- |
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172 | |
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173 | bool CMPIManager::IsMaster(MPI_Comm _comm) |
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174 | { |
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175 | return (CMPIManager::GetCommRank(_comm) == 0); |
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176 | } |
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177 | |
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178 | bool CMPIManager::IsRank(int _rank, MPI_Comm _comm) |
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179 | { |
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180 | return (CMPIManager::GetCommRank(_comm) == _rank); |
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181 | } |
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182 | |
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183 | // --------------------------- Communication simple ------------------------- |
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184 | |
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185 | void CMPIManager::Send (MPI_Comm _comm, int _dest_rank, char * _data, |
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186 | std::size_t _size, MPI_Request & _request) |
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187 | { |
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188 | int nsize = _size; |
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189 | if (MPI_Issend(_data, nsize, MPI_CHAR, _dest_rank, 0, _comm, &_request) != MPI_SUCCESS) |
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190 | ERROR("CMPIManager::Send (comm, dest_rank, data, size, request)", << " MPI Error !"); |
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191 | } |
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192 | |
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193 | void CMPIManager::Wait (MPI_Request & _request) |
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194 | { |
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195 | MPI_Status status; |
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196 | if (MPI_Wait(&_request, &status) != MPI_SUCCESS) |
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197 | ERROR("CMPIManager::Wait (request)", << " MPI Error !"); |
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198 | } |
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199 | |
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200 | bool CMPIManager::Test (MPI_Request & _request) |
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201 | { |
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202 | MPI_Status status; |
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203 | int flag = 0; |
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204 | if (MPI_Test(&_request, &flag, &status) != MPI_SUCCESS) |
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205 | ERROR("CMPIManager::Test (request)", << " MPI Error !"); |
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206 | return (flag); |
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207 | } |
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208 | |
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209 | bool CMPIManager::HasReceivedData(MPI_Comm _comm, int _src_rank) |
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210 | { |
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211 | MPI_Status status; |
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212 | int flag = 0; |
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213 | if (MPI_Iprobe(_src_rank, MPI_ANY_TAG, _comm, &flag, &status) != MPI_SUCCESS) |
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214 | ERROR("CMPIManager::HasReceivedData (comm, rank)", << " MPI Error !"); |
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215 | return (flag); |
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216 | } |
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217 | |
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218 | std::size_t CMPIManager::GetReceivedDataSize(MPI_Comm _comm, int _src_rank) |
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219 | { |
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220 | MPI_Status status; |
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221 | int flag = 0, size = 0; |
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222 | if (MPI_Iprobe(_src_rank, MPI_ANY_TAG, _comm, &flag, &status) != MPI_SUCCESS) |
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223 | ERROR("CMPIManager::getReceivedDataSize (comm, rank)", << " MPI Error !"); |
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224 | if (!flag) return (0); |
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225 | if (MPI_Get_count(&status, MPI_CHAR, &size) != MPI_SUCCESS) |
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226 | ERROR("CMPIManager::getReceivedDataSize (comm, rank)", << " MPI Error !"); |
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227 | |
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228 | return (size); |
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229 | } |
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230 | |
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231 | void CMPIManager::Receive(MPI_Comm _comm, int _src_rank, char * _data) |
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232 | { |
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233 | MPI_Request request = 0; |
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234 | int size = CMPIManager::GetReceivedDataSize(_comm, _src_rank); |
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235 | if (MPI_Irecv(_data, size, MPI_CHAR, _src_rank, MPI_ANY_TAG, _comm, &request) != MPI_SUCCESS) |
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236 | ERROR("CMPIManager::Receive (comm, src_rank, data)", << " MPI Error !"); |
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237 | CMPIManager::Wait (request); // Temporaire |
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238 | } |
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239 | |
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240 | void CMPIManager::AllGather(int _indata, std::vector<int> & _outdata, MPI_Comm _comm) |
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241 | { |
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242 | std::vector<int> data; data.push_back(_indata); |
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243 | CMPIManager::AllGather(data, _outdata, _comm); |
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244 | } |
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245 | |
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246 | void CMPIManager::AllGather(const std::vector<int> & _indata, |
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247 | std::vector<int> & _outdata, MPI_Comm _comm) |
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248 | { |
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249 | int sendcount = _indata.size(), |
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250 | recvcount = _indata.size() * CMPIManager::GetCommSize(_comm); |
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251 | _outdata.resize(recvcount); |
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252 | if (MPI_Allgather ( const_cast<int*>(&(_indata[0])), sendcount, MPI_INTEGER, |
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253 | &(_outdata[0]) , recvcount, MPI_INTEGER, _comm) != MPI_SUCCESS) |
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254 | ERROR("CMPIManager::AllGather (indata, outdata, comm)", << " MPI Error !"); |
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255 | } |
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256 | |
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257 | // ------------------------- Communication 'complexe' ----------------------- |
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258 | |
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259 | void CMPIManager::SendLinearBuffer(MPI_Comm _comm, int _dest_rank, CLinearBuffer & _lbuffer, MPI_Request & _request) |
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260 | { |
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261 | CMPIManager::Send(_comm, _dest_rank, _lbuffer, _lbuffer.getUsedSize(), _request); |
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262 | _lbuffer.clear(); |
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263 | } |
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264 | |
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265 | void CMPIManager::ReceiveLinearBuffer(MPI_Comm _comm, int _src_rank, CLinearBuffer & _lbuffer) |
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266 | { |
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267 | CMPIManager::Receive(_comm, _src_rank, _lbuffer); |
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268 | _lbuffer.computeBufferData(); |
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269 | } |
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270 | |
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271 | boost::shared_ptr<CLinearBuffer> CMPIManager::ReceiveLinearBuffer(MPI_Comm _comm, int _src_rank) |
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272 | { |
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273 | boost::shared_ptr<CLinearBuffer> buff_ptr |
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274 | (new CLinearBuffer(CMPIManager::GetReceivedDataSize(_comm, _src_rank))); |
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275 | CMPIManager::ReceiveLinearBuffer(_comm, _src_rank, *buff_ptr); |
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276 | return (buff_ptr); |
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277 | } |
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278 | |
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279 | void CMPIManager::ReceiveCircularBuffer(MPI_Comm _comm, int _src_rank, CCircularBuffer & _cbuffer) |
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280 | { |
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281 | std::size_t data_size = CMPIManager::GetReceivedDataSize(_comm, _src_rank); |
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282 | std::size_t data_begin = _cbuffer.prepareNextDataPosition(data_size); |
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283 | CMPIManager::Receive(_comm, _src_rank, _cbuffer.getData(data_begin)); |
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284 | _cbuffer.updateNbRequests(data_begin, data_begin + data_size); |
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285 | } |
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286 | |
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287 | // ---------------------- Mémoire (non fonctionnel ....) -------------------- |
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288 | |
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289 | void CMPIManager::AllocMemory(void * _data, std::size_t _size) |
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290 | { |
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291 | if (MPI_Alloc_mem(sizeof(char) * _size, MPI_INFO_NULL, _data) != MPI_SUCCESS) |
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292 | ERROR("CMPIManager::AllocMem(data, size)", << " MPI Error !"); |
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293 | } |
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294 | |
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295 | void CMPIManager::FreeMemory (void * _data) |
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296 | { |
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297 | MPI_Free_mem(_data); |
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298 | } |
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299 | |
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300 | } // namespace comm |
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301 | } // namespace xmlioserver |
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302 | |
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