[623] | 1 | /*! |
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| 2 | \file transformation_mapping.cpp |
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| 3 | \author Ha NGUYEN |
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| 4 | \since 14 May 2015 |
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[624] | 5 | \date 18 June 2015 |
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[623] | 6 | |
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| 7 | \brief Take charge of communication among clients to exchange transformed data. |
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| 8 | */ |
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| 9 | |
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[620] | 10 | #include "transformation_mapping.hpp" |
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| 11 | #include <boost/unordered_map.hpp> |
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| 12 | #include "context.hpp" |
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| 13 | #include "context_client.hpp" |
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[622] | 14 | #include "distribution_client.hpp" |
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[620] | 15 | |
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| 16 | namespace xios { |
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| 17 | |
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| 18 | CTransformationMapping::CTransformationMapping(CGrid* destination, CGrid* source) |
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| 19 | : gridSource_(source), gridDestination_(destination) |
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| 20 | { |
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| 21 | CContext* context = CContext::getCurrent(); |
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| 22 | CContextClient* client=context->client; |
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| 23 | int clientRank = client->clientRank; |
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| 24 | |
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[623] | 25 | CDistributionClient distributionClientSrc(client->clientRank, gridSource_); |
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[622] | 26 | |
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[623] | 27 | const CArray<size_t,1>& globalIndexGridSrc = distributionClientSrc.getGlobalDataIndexSendToServer(); //gridSource_->getDistributionClient()->getGlobalDataIndexSendToServer(); |
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[620] | 28 | boost::unordered_map<size_t,int> globalIndexOfServer; |
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| 29 | int globalIndexSize = globalIndexGridSrc.numElements(); |
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| 30 | for (int idx = 0; idx < globalIndexSize; ++idx) |
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| 31 | { |
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| 32 | globalIndexOfServer[globalIndexGridSrc(idx)] = clientRank; |
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| 33 | } |
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| 34 | |
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| 35 | gridIndexClientClientMapping_ = new CClientServerMappingDistributed(globalIndexOfServer, |
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| 36 | client->intraComm, |
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| 37 | true); |
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| 38 | } |
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| 39 | |
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[630] | 40 | CTransformationMapping::CTransformationMapping(CAxis* destination, CAxis* source) |
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| 41 | : gridSource_(0), gridDestination_(0) |
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| 42 | { |
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| 43 | CContext* context = CContext::getCurrent(); |
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| 44 | CContextClient* client=context->client; |
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| 45 | int clientRank = client->clientRank; |
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| 46 | |
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[666] | 47 | int niSrc = source->n.getValue(); |
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| 48 | int ibeginSrc = source->begin.getValue(); |
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[630] | 49 | |
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| 50 | boost::unordered_map<size_t,int> globalIndexOfAxisSource; |
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| 51 | for (int idx = 0; idx < niSrc; ++idx) |
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| 52 | { |
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| 53 | globalIndexOfAxisSource[idx+ibeginSrc] = clientRank; |
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| 54 | } |
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| 55 | |
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| 56 | gridIndexClientClientMapping_ = new CClientServerMappingDistributed(globalIndexOfAxisSource, |
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| 57 | client->intraComm, |
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| 58 | true); |
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| 59 | } |
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| 60 | |
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[620] | 61 | CTransformationMapping::~CTransformationMapping() |
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| 62 | { |
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| 63 | if (0 != gridIndexClientClientMapping_) delete gridIndexClientClientMapping_; |
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| 64 | } |
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| 65 | |
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| 66 | /*! |
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| 67 | Suppose that we have transformations between two grids, which are represented in form of mapping between global indexes of these two grids, |
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[621] | 68 | this function tries to find out which clients a client needs to send and receive these global indexes to accomplish the transformations. |
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[630] | 69 | The grid destination is the grid whose global indexes demande global indexes from the other grid |
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[622] | 70 | Grid destination and grid source are also distributed among clients but in different manners. |
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[630] | 71 | \param [in] globaIndexWeightFromDestToSource mapping representing the transformations |
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[620] | 72 | */ |
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[630] | 73 | void CTransformationMapping::computeTransformationMapping(const std::map<size_t, std::vector<std::pair<size_t,double> > >& globaIndexWeightFromDestToSource) |
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[620] | 74 | { |
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| 75 | CContext* context = CContext::getCurrent(); |
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| 76 | CContextClient* client=context->client; |
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| 77 | |
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[630] | 78 | std::map<size_t, std::vector<std::pair<size_t,double> > >::const_iterator itbMap = globaIndexWeightFromDestToSource.begin(), itMap, |
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| 79 | iteMap = globaIndexWeightFromDestToSource.end(); |
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| 80 | |
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| 81 | // Not only one index on grid destination can demande two indexes from grid source |
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| 82 | // but an index on grid source has to be sent to two indexes of grid destination |
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| 83 | std::map<size_t, std::vector<std::pair<size_t,double> > > globalIndexMapFromSrcToDest; |
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| 84 | std::vector<std::pair<size_t,double> >::const_iterator itbVecPair, itVecPair, iteVecPair; |
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[620] | 85 | for (itMap = itbMap; itMap != iteMap; ++itMap) |
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| 86 | { |
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[630] | 87 | itbVecPair = (itMap->second).begin(); |
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| 88 | iteVecPair = (itMap->second).end(); |
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| 89 | for (itVecPair = itbVecPair; itVecPair != iteVecPair; ++itVecPair) |
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| 90 | { |
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| 91 | globalIndexMapFromSrcToDest[itVecPair->first].push_back(std::make_pair(itMap->first, itVecPair->second)); |
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| 92 | } |
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[620] | 93 | } |
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| 94 | |
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| 95 | // All global indexes of a client on grid destination |
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[630] | 96 | CArray<size_t,1> globalIndexMap(globalIndexMapFromSrcToDest.size()); |
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| 97 | itbMap = globalIndexMapFromSrcToDest.begin(); |
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| 98 | iteMap = globalIndexMapFromSrcToDest.end(); |
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[620] | 99 | int idx = 0; |
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| 100 | for (itMap = itbMap; itMap != iteMap; ++itMap) |
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| 101 | { |
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[630] | 102 | globalIndexMap(idx) = itMap->first; |
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| 103 | ++idx; |
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[620] | 104 | } |
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| 105 | |
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| 106 | // Find out on which clients the necessary indexes of grid source are. |
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| 107 | gridIndexClientClientMapping_->computeServerIndexMapping(globalIndexMap); |
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| 108 | const std::map<int, std::vector<size_t> >& globalIndexSentFromGridSource = gridIndexClientClientMapping_->getGlobalIndexOnServer(); |
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| 109 | std::map<int, std::vector<size_t> >::const_iterator itbMapSrc = globalIndexSentFromGridSource.begin(), itMapSrc, |
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| 110 | iteMapSrc = globalIndexSentFromGridSource.end(); |
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| 111 | std::vector<size_t>::const_iterator itbVec, itVec, iteVec; |
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| 112 | for (itMapSrc = itbMapSrc; itMapSrc != iteMapSrc; ++itMapSrc) |
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| 113 | { |
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| 114 | int sourceRank = itMapSrc->first; |
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| 115 | itbVec = (itMapSrc->second).begin(); |
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| 116 | iteVec = (itMapSrc->second).end(); |
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| 117 | for (itVec = itbVec; itVec != iteVec; ++itVec) |
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| 118 | { |
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| 119 | (globalIndexReceivedOnGridDestMapping_[sourceRank]).push_back(globalIndexMapFromSrcToDest[*itVec]); |
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| 120 | } |
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| 121 | } |
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| 122 | |
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| 123 | // Inform client about the destination to which it needs to send global indexes |
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| 124 | int nbClient = client->clientSize; |
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| 125 | int* sendBuff = new int[nbClient]; |
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| 126 | int* recvBuff = new int[nbClient]; |
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| 127 | for (int i = 0; i < nbClient; ++i) sendBuff[i] = 0; |
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| 128 | |
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| 129 | // First of all, inform the number of destination a client needs to send global index |
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| 130 | for (itMapSrc = itbMapSrc; itMapSrc != iteMapSrc; ++itMapSrc) sendBuff[itMapSrc->first] = 1; |
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| 131 | MPI_Allreduce(sendBuff, recvBuff, nbClient, MPI_INT, MPI_SUM, client->intraComm); |
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| 132 | int numClientToReceive = recvBuff[client->clientRank]; |
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| 133 | |
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| 134 | // Then specify the size of receiving buffer, because we use synch send/receive so only necessary to know maximum size |
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| 135 | for (itMapSrc = itbMapSrc; itMapSrc != iteMapSrc; ++itMapSrc) sendBuff[itMapSrc->first] = (itMapSrc->second).size(); |
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| 136 | MPI_Allreduce(sendBuff, recvBuff, nbClient, MPI_INT, MPI_MAX, client->intraComm); |
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| 137 | |
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| 138 | int buffSize = recvBuff[client->clientRank]; |
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| 139 | unsigned long* recvBuffGlobalIndex; |
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| 140 | if (0 != buffSize) recvBuffGlobalIndex = new unsigned long [buffSize]; |
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| 141 | |
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[634] | 142 | std::map<int, MPI_Request> requests; |
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| 143 | |
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[620] | 144 | // Inform all "source clients" about index that they need to send |
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| 145 | for (itMapSrc = itbMapSrc; itMapSrc != iteMapSrc; ++itMapSrc) |
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| 146 | { |
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| 147 | unsigned long* sendPtr = const_cast<unsigned long*>(&(itMapSrc->second)[0]); |
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| 148 | MPI_Isend(sendPtr, |
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| 149 | (itMapSrc->second).size(), |
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| 150 | MPI_UNSIGNED_LONG, |
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| 151 | itMapSrc->first, |
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| 152 | 11, |
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| 153 | client->intraComm, |
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[634] | 154 | &requests[itMapSrc->first]); |
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[620] | 155 | } |
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| 156 | |
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| 157 | // Now all the "source clients" try listening messages from other "destination clients" |
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| 158 | int numClientReceived = 0; // number of client to which data has been already sent |
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| 159 | int countBuff; |
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| 160 | while (numClientReceived < numClientToReceive) |
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| 161 | { |
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| 162 | MPI_Status status; |
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| 163 | MPI_Recv(recvBuffGlobalIndex, |
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| 164 | buffSize, |
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| 165 | MPI_UNSIGNED_LONG, |
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| 166 | MPI_ANY_SOURCE, |
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| 167 | 11, |
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| 168 | client->intraComm, |
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| 169 | &status); |
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| 170 | |
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| 171 | MPI_Get_count(&status, MPI_UNSIGNED_LONG, &countBuff); |
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| 172 | int clientDestRank = status.MPI_SOURCE; |
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| 173 | for (int idx = 0; idx < countBuff; ++idx) |
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| 174 | { |
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| 175 | globalIndexSendToGridDestMapping_[clientDestRank].push_back(recvBuffGlobalIndex[idx]); |
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| 176 | } |
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| 177 | ++numClientReceived; |
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| 178 | } |
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| 179 | |
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[634] | 180 | std::map<int, MPI_Request>::iterator itRequest; |
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| 181 | for (itRequest = requests.begin(); itRequest != requests.end(); ++itRequest) |
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| 182 | MPI_Wait(&itRequest->second, MPI_STATUS_IGNORE); |
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| 183 | |
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[620] | 184 | delete [] sendBuff; |
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| 185 | delete [] recvBuff; |
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| 186 | if (0 != buffSize) delete [] recvBuffGlobalIndex; |
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| 187 | } |
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| 188 | |
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[623] | 189 | /*! |
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| 190 | Return (grid) global index on grid destination. This mapping contains the rank of client source (that sends info to grid destination) |
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| 191 | and the corresponding global index to write on grid destination. |
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| 192 | \return global index mapping to receive on grid destination |
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| 193 | */ |
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[630] | 194 | const std::map<int,std::vector<std::vector<std::pair<size_t,double> > > >& CTransformationMapping::getGlobalIndexReceivedOnGridDestMapping() const |
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[620] | 195 | { |
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| 196 | return globalIndexReceivedOnGridDestMapping_; |
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| 197 | } |
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| 198 | |
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[623] | 199 | /*! |
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| 200 | Return (grid) global index on grid source. This mapping contains the rank of client destination (which receives transformation info) and |
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| 201 | the corresponding global index to send |
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| 202 | \return global index mapping to send on grid source |
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| 203 | */ |
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[620] | 204 | const std::map<int,std::vector<size_t> >& CTransformationMapping::getGlobalIndexSendToGridDestMapping() const |
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| 205 | { |
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| 206 | return globalIndexSendToGridDestMapping_; |
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| 207 | } |
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| 208 | |
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| 209 | } |
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