1 | #include "xios_spl.hpp" |
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2 | #include "context_client.hpp" |
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3 | #include "context_server.hpp" |
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4 | #include "event_client.hpp" |
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5 | #include "buffer_out.hpp" |
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6 | #include "buffer_client.hpp" |
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7 | #include "type.hpp" |
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8 | #include "event_client.hpp" |
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9 | #include "context.hpp" |
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10 | #include "mpi.hpp" |
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11 | #include "timer.hpp" |
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12 | #include "cxios.hpp" |
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13 | #include "server.hpp" |
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14 | |
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15 | namespace xios |
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16 | { |
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17 | /*! |
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18 | \param [in] parent Pointer to context on client side |
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19 | \param [in] intraComm_ communicator of group client |
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20 | \param [in] interComm_ communicator of group server |
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21 | \cxtSer [in] cxtSer Pointer to context of server side. (It is only used in case of attached mode). |
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22 | */ |
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23 | CContextClient::CContextClient(CContext* parent, MPI_Comm intraComm_, MPI_Comm interComm_, CContext* cxtSer) |
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24 | : mapBufferSize_(), parentServer(cxtSer), maxBufferedEvents(4) |
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25 | { |
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26 | context = parent; |
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27 | intraComm = intraComm_; |
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28 | interComm = interComm_; |
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29 | MPI_Comm_rank(intraComm, &clientRank); |
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30 | MPI_Comm_size(intraComm, &clientSize); |
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31 | |
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32 | int flag; |
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33 | MPI_Comm_test_inter(interComm, &flag); |
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34 | if (flag) MPI_Comm_remote_size(interComm, &serverSize); |
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35 | else MPI_Comm_size(interComm, &serverSize); |
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36 | |
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37 | if (clientSize < serverSize) |
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38 | { |
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39 | int serverByClient = serverSize / clientSize; |
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40 | int remain = serverSize % clientSize; |
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41 | int rankStart = serverByClient * clientRank; |
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42 | |
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43 | if (clientRank < remain) |
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44 | { |
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45 | serverByClient++; |
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46 | rankStart += clientRank; |
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47 | } |
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48 | else |
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49 | rankStart += remain; |
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50 | |
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51 | for (int i = 0; i < serverByClient; i++) |
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52 | ranksServerLeader.push_back(rankStart + i); |
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53 | |
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54 | ranksServerNotLeader.resize(0); |
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55 | } |
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56 | else |
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57 | { |
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58 | int clientByServer = clientSize / serverSize; |
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59 | int remain = clientSize % serverSize; |
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60 | |
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61 | if (clientRank < (clientByServer + 1) * remain) |
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62 | { |
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63 | if (clientRank % (clientByServer + 1) == 0) |
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64 | ranksServerLeader.push_back(clientRank / (clientByServer + 1)); |
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65 | else |
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66 | ranksServerNotLeader.push_back(clientRank / (clientByServer + 1)); |
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67 | } |
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68 | else |
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69 | { |
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70 | int rank = clientRank - (clientByServer + 1) * remain; |
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71 | if (rank % clientByServer == 0) |
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72 | ranksServerLeader.push_back(remain + rank / clientByServer); |
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73 | else |
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74 | ranksServerNotLeader.push_back(remain + rank / clientByServer); |
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75 | } |
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76 | } |
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77 | |
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78 | timeLine = 0; |
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79 | } |
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80 | |
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81 | /*! |
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82 | In case of attached mode, the current context must be reset to context for client |
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83 | \param [in] event Event sent to server |
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84 | */ |
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85 | void CContextClient::sendEvent(CEventClient& event) |
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86 | { |
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87 | list<int> ranks = event.getRanks(); |
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88 | |
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89 | if (!event.isEmpty()) |
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90 | { |
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91 | list<int> sizes = event.getSizes(); |
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92 | |
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93 | // We force the getBuffers call to be non-blocking on classical servers |
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94 | list<CBufferOut*> buffList; |
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95 | bool couldBuffer = getBuffers(ranks, sizes, buffList, (!CXios::isClient && (CServer::serverLevel == 0) )); |
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96 | // bool couldBuffer = getBuffers(ranks, sizes, buffList, CXios::isServer ); |
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97 | |
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98 | if (couldBuffer) |
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99 | { |
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100 | event.send(timeLine, sizes, buffList); |
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101 | |
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102 | checkBuffers(ranks); |
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103 | |
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104 | if (isAttachedModeEnabled()) // couldBuffer is always true in attached mode |
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105 | { |
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106 | waitEvent(ranks); |
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107 | CContext::setCurrent(context->getId()); |
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108 | } |
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109 | } |
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110 | else |
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111 | { |
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112 | tmpBufferedEvent.ranks = ranks; |
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113 | tmpBufferedEvent.sizes = sizes; |
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114 | |
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115 | for (list<int>::const_iterator it = sizes.begin(); it != sizes.end(); it++) |
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116 | tmpBufferedEvent.buffers.push_back(new CBufferOut(*it)); |
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117 | |
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118 | event.send(timeLine, tmpBufferedEvent.sizes, tmpBufferedEvent.buffers); |
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119 | } |
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120 | } |
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121 | |
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122 | timeLine++; |
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123 | } |
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124 | |
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125 | /*! |
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126 | * Send the temporarily buffered event (if any). |
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127 | * |
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128 | * \return true if a temporarily buffered event could be sent, false otherwise |
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129 | */ |
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130 | bool CContextClient::sendTemporarilyBufferedEvent() |
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131 | { |
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132 | bool couldSendTmpBufferedEvent = false; |
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133 | |
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134 | if (hasTemporarilyBufferedEvent()) |
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135 | { |
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136 | list<CBufferOut*> buffList; |
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137 | if (getBuffers(tmpBufferedEvent.ranks, tmpBufferedEvent.sizes, buffList, true)) // Non-blocking call |
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138 | { |
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139 | list<CBufferOut*>::iterator it, itBuffer; |
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140 | |
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141 | for (it = tmpBufferedEvent.buffers.begin(), itBuffer = buffList.begin(); it != tmpBufferedEvent.buffers.end(); it++, itBuffer++) |
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142 | (*itBuffer)->put((char*)(*it)->start(), (*it)->count()); |
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143 | |
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144 | checkBuffers(tmpBufferedEvent.ranks); |
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145 | |
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146 | tmpBufferedEvent.clear(); |
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147 | |
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148 | couldSendTmpBufferedEvent = true; |
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149 | } |
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150 | } |
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151 | |
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152 | return couldSendTmpBufferedEvent; |
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153 | } |
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154 | |
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155 | /*! |
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156 | If client is also server (attached mode), after sending event, it should process right away |
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157 | the incoming event. |
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158 | \param [in] ranks list rank of server connected this client |
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159 | */ |
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160 | void CContextClient::waitEvent(list<int>& ranks) |
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161 | { |
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162 | parentServer->server->setPendingEvent(); |
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163 | while (checkBuffers(ranks)) |
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164 | { |
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165 | parentServer->server->listen(); |
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166 | parentServer->server->checkPendingRequest(); |
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167 | } |
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168 | |
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169 | while (parentServer->server->hasPendingEvent()) |
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170 | { |
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171 | parentServer->server->eventLoop(); |
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172 | } |
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173 | } |
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174 | |
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175 | /*! |
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176 | * Get buffers for each connection to the servers. This function blocks until there is enough room in the buffers unless |
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177 | * it is explicitly requested to be non-blocking. |
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178 | * |
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179 | * \param [in] serverList list of rank of connected server |
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180 | * \param [in] sizeList size of message corresponding to each connection |
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181 | * \param [out] retBuffers list of buffers that can be used to store an event |
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182 | * \param [in] nonBlocking whether this function should be non-blocking |
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183 | * \return whether the already allocated buffers could be used |
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184 | */ |
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185 | bool CContextClient::getBuffers(const list<int>& serverList, const list<int>& sizeList, list<CBufferOut*>& retBuffers, |
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186 | bool nonBlocking /*= false*/) |
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187 | { |
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188 | list<int>::const_iterator itServer, itSize; |
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189 | list<CClientBuffer*> bufferList; |
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190 | map<int,CClientBuffer*>::const_iterator it; |
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191 | list<CClientBuffer*>::iterator itBuffer; |
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192 | bool areBuffersFree; |
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193 | |
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194 | for (itServer = serverList.begin(); itServer != serverList.end(); itServer++) |
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195 | { |
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196 | it = buffers.find(*itServer); |
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197 | if (it == buffers.end()) |
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198 | { |
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199 | newBuffer(*itServer); |
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200 | it = buffers.find(*itServer); |
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201 | } |
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202 | bufferList.push_back(it->second); |
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203 | } |
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204 | |
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205 | CTimer::get("Blocking time").resume(); |
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206 | do |
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207 | { |
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208 | areBuffersFree = true; |
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209 | for (itBuffer = bufferList.begin(), itSize = sizeList.begin(); itBuffer != bufferList.end(); itBuffer++, itSize++) |
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210 | areBuffersFree &= (*itBuffer)->isBufferFree(*itSize); |
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211 | |
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212 | if (!areBuffersFree) |
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213 | { |
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214 | checkBuffers(); |
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215 | if (CServer::serverLevel == 0) |
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216 | context->server->listen(); |
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217 | |
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218 | else if (CServer::serverLevel == 1) |
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219 | { |
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220 | context->server->listen(); |
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221 | for (int i = 0; i < context->serverPrimServer.size(); ++i) |
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222 | context->serverPrimServer[i]->listen(); |
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223 | } |
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224 | |
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225 | else if (CServer::serverLevel == 2) |
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226 | context->server->listen(); |
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227 | |
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228 | } |
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229 | } while (!areBuffersFree && !nonBlocking); |
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230 | |
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231 | CTimer::get("Blocking time").suspend(); |
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232 | |
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233 | if (areBuffersFree) |
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234 | { |
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235 | for (itBuffer = bufferList.begin(), itSize = sizeList.begin(); itBuffer != bufferList.end(); itBuffer++, itSize++) |
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236 | retBuffers.push_back((*itBuffer)->getBuffer(*itSize)); |
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237 | } |
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238 | |
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239 | return areBuffersFree; |
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240 | } |
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241 | |
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242 | /*! |
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243 | Make a new buffer for a certain connection to server with specific rank |
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244 | \param [in] rank rank of connected server |
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245 | */ |
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246 | void CContextClient::newBuffer(int rank) |
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247 | { |
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248 | if (!mapBufferSize_.count(rank)) |
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249 | { |
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250 | error(0) << "WARNING: Unexpected request for buffer to communicate with server " << rank << std::endl; |
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251 | mapBufferSize_[rank] = CXios::minBufferSize; |
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252 | maxEventSizes[rank] = CXios::minBufferSize; |
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253 | } |
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254 | CClientBuffer* buffer = buffers[rank] = new CClientBuffer(interComm, rank, mapBufferSize_[rank], maxEventSizes[rank], maxBufferedEvents); |
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255 | // Notify the server |
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256 | CBufferOut* bufOut = buffer->getBuffer(sizeof(StdSize)); |
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257 | bufOut->put(mapBufferSize_[rank]); // Stupid C++ |
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258 | buffer->checkBuffer(); |
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259 | } |
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260 | |
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261 | /*! |
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262 | Verify state of buffers. Buffer is under pending state if there is no message on it |
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263 | \return state of buffers, pending(true), ready(false) |
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264 | */ |
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265 | bool CContextClient::checkBuffers(void) |
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266 | { |
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267 | map<int,CClientBuffer*>::iterator itBuff; |
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268 | bool pending = false; |
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269 | for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++) |
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270 | pending |= itBuff->second->checkBuffer(); |
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271 | return pending; |
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272 | } |
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273 | |
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274 | //! Release all buffers |
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275 | void CContextClient::releaseBuffers() |
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276 | { |
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277 | map<int,CClientBuffer*>::iterator itBuff; |
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278 | for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++) |
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279 | { |
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280 | delete itBuff->second; |
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281 | } |
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282 | buffers.clear(); |
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283 | } |
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284 | |
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285 | /*! |
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286 | Verify state of buffers corresponding to a connection |
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287 | \param [in] ranks list rank of server to which client connects to |
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288 | \return state of buffers, pending(true), ready(false) |
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289 | */ |
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290 | bool CContextClient::checkBuffers(list<int>& ranks) |
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291 | { |
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292 | list<int>::iterator it; |
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293 | bool pending = false; |
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294 | for (it = ranks.begin(); it != ranks.end(); it++) pending |= buffers[*it]->checkBuffer(); |
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295 | return pending; |
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296 | } |
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297 | |
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298 | /*! |
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299 | * Set the buffer size for each connection. Warning: This function is collective. |
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300 | * |
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301 | * \param [in] mapSize maps the rank of the connected servers to the size of the correspoinding buffer |
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302 | * \param [in] maxEventSize maps the rank of the connected servers to the size of the biggest event |
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303 | */ |
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304 | void CContextClient::setBufferSize(const std::map<int,StdSize>& mapSize, const std::map<int,StdSize>& maxEventSize) |
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305 | { |
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306 | mapBufferSize_ = mapSize; |
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307 | maxEventSizes = maxEventSize; |
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308 | |
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309 | // Compute the maximum number of events that can be safely buffered. |
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310 | double minBufferSizeEventSizeRatio = std::numeric_limits<double>::max(); |
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311 | for (std::map<int,StdSize>::const_iterator it = mapSize.begin(), ite = mapSize.end(); it != ite; ++it) |
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312 | { |
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313 | double ratio = double(it->second) / maxEventSize.at(it->first); |
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314 | if (ratio < minBufferSizeEventSizeRatio) minBufferSizeEventSizeRatio = ratio; |
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315 | } |
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316 | MPI_Allreduce(MPI_IN_PLACE, &minBufferSizeEventSizeRatio, 1, MPI_DOUBLE, MPI_MIN, intraComm); |
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317 | |
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318 | if (minBufferSizeEventSizeRatio < 1.0) |
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319 | { |
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320 | ERROR("void CContextClient::setBufferSize(const std::map<int,StdSize>& mapSize, const std::map<int,StdSize>& maxEventSize)", |
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321 | << "The buffer sizes and the maximum events sizes are incoherent."); |
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322 | } |
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323 | else if (minBufferSizeEventSizeRatio == std::numeric_limits<double>::max()) |
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324 | minBufferSizeEventSizeRatio = 1.0; // In this case, maxBufferedEvents will never be used but we want to avoid any floating point exception |
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325 | |
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326 | maxBufferedEvents = size_t(2 * minBufferSizeEventSizeRatio) // there is room for two local buffers on the server |
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327 | + size_t(minBufferSizeEventSizeRatio) // one local buffer can always be fully used |
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328 | + 1; // the other local buffer might contain only one event |
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329 | } |
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330 | |
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331 | /*! |
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332 | Get leading server in the group of connected server |
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333 | \return ranks of leading servers |
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334 | */ |
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335 | const std::list<int>& CContextClient::getRanksServerNotLeader(void) const |
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336 | { |
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337 | return ranksServerNotLeader; |
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338 | } |
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339 | |
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340 | /*! |
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341 | Check if client connects to leading server |
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342 | \return connected(true), not connected (false) |
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343 | */ |
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344 | bool CContextClient::isServerNotLeader(void) const |
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345 | { |
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346 | return !ranksServerNotLeader.empty(); |
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347 | } |
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348 | |
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349 | /*! |
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350 | Get leading server in the group of connected server |
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351 | \return ranks of leading servers |
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352 | */ |
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353 | const std::list<int>& CContextClient::getRanksServerLeader(void) const |
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354 | { |
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355 | return ranksServerLeader; |
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356 | } |
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357 | |
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358 | /*! |
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359 | Check if client connects to leading server |
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360 | \return connected(true), not connected (false) |
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361 | */ |
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362 | bool CContextClient::isServerLeader(void) const |
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363 | { |
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364 | return !ranksServerLeader.empty(); |
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365 | } |
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366 | |
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367 | /*! |
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368 | * Check if the attached mode is used. |
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369 | * |
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370 | * \return true if and only if attached mode is used |
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371 | */ |
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372 | bool CContextClient::isAttachedModeEnabled() const |
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373 | { |
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374 | return (parentServer != 0); |
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375 | } |
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376 | |
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377 | /*! |
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378 | * Finalize context client and do some reports. Function is non-blocking. |
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379 | */ |
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380 | void CContextClient::finalize(void) |
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381 | { |
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382 | map<int,CClientBuffer*>::iterator itBuff; |
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383 | bool stop = false; |
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384 | |
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385 | CTimer::get("Blocking time").resume(); |
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386 | while (hasTemporarilyBufferedEvent()) |
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387 | { |
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388 | checkBuffers(); |
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389 | sendTemporarilyBufferedEvent(); |
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390 | } |
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391 | CTimer::get("Blocking time").suspend(); |
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392 | |
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393 | CEventClient event(CContext::GetType(), CContext::EVENT_ID_CONTEXT_FINALIZE); |
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394 | if (isServerLeader()) |
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395 | { |
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396 | CMessage msg; |
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397 | const std::list<int>& ranks = getRanksServerLeader(); |
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398 | for (std::list<int>::const_iterator itRank = ranks.begin(), itRankEnd = ranks.end(); itRank != itRankEnd; ++itRank) |
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399 | event.push(*itRank, 1, msg); |
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400 | sendEvent(event); |
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401 | } |
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402 | else sendEvent(event); |
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403 | |
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404 | CTimer::get("Blocking time").resume(); |
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405 | // while (!stop) |
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406 | { |
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407 | checkBuffers(); |
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408 | if (hasTemporarilyBufferedEvent()) |
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409 | sendTemporarilyBufferedEvent(); |
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410 | |
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411 | stop = true; |
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412 | // for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++) stop &= !itBuff->second->hasPendingRequest(); |
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413 | } |
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414 | CTimer::get("Blocking time").suspend(); |
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415 | |
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416 | std::map<int,StdSize>::const_iterator itbMap = mapBufferSize_.begin(), |
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417 | iteMap = mapBufferSize_.end(), itMap; |
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418 | |
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419 | StdSize totalBuf = 0; |
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420 | for (itMap = itbMap; itMap != iteMap; ++itMap) |
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421 | { |
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422 | report(10) << " Memory report : Context <" << context->getId() << "> : client side : memory used for buffer of each connection to server" << endl |
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423 | << " +) To server with rank " << itMap->first << " : " << itMap->second << " bytes " << endl; |
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424 | totalBuf += itMap->second; |
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425 | } |
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426 | report(0) << " Memory report : Context <" << context->getId() << "> : client side : total memory used for buffer " << totalBuf << " bytes" << endl; |
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427 | |
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428 | //releaseBuffers(); // moved to CContext::finalize() |
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429 | } |
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430 | |
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431 | |
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432 | /*! |
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433 | */ |
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434 | bool CContextClient::havePendingRequests(void) |
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435 | { |
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436 | bool pending = false; |
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437 | map<int,CClientBuffer*>::iterator itBuff; |
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438 | for (itBuff = buffers.begin(); itBuff != buffers.end(); itBuff++) |
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439 | pending |= itBuff->second->hasPendingRequest(); |
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440 | return pending; |
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441 | } |
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442 | |
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443 | |
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444 | } |
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