1 | /*! |
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2 | \file client_client_dht_template.hpp |
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3 | \author Ha NGUYEN |
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4 | \since 01 Oct 2015 |
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5 | \date 06 Oct 2015 |
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6 | |
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7 | \brief Distributed hashed table implementation. |
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8 | */ |
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9 | |
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10 | #ifndef __XIOS_CLIENT_CLIENT_DHT_TEMPLATE_HPP__ |
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11 | #define __XIOS_CLIENT_CLIENT_DHT_TEMPLATE_HPP__ |
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12 | |
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13 | #include "xios_spl.hpp" |
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14 | #include "array_new.hpp" |
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15 | #include "mpi.hpp" |
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16 | #include "policy.hpp" |
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17 | #include <boost/unordered_map.hpp> |
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18 | |
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19 | namespace xios |
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20 | { |
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21 | template<typename T, class HierarchyPolicy = DivideCommByTwo> class CClientClientDHTTemplate; |
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22 | |
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23 | /*! |
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24 | \class CClientClientDHTTemplate |
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25 | This class provides the similar features like \class CClientServerMappingDistributed, |
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26 | which implements a simple distributed hashed table; Moreover, by extending with hierarchical structure, |
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27 | it allows to reduce greatly the number of communication among processes. |
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28 | */ |
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29 | template<typename T, typename HierarchyPolicy> |
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30 | class CClientClientDHTTemplate: public HierarchyPolicy |
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31 | { |
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32 | public: |
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33 | typedef T InfoType; |
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34 | static const int infoTypeSize = sizeof(InfoType); |
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35 | |
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36 | public: |
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37 | /** Default constructor */ |
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38 | CClientClientDHTTemplate(const boost::unordered_map<size_t,T>& indexInfoInitMap, |
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39 | const MPI_Comm& clientIntraComm, |
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40 | int hierarLvl = 2); |
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41 | |
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42 | void computeIndexInfoMapping(const CArray<size_t,1>& indices); |
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43 | |
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44 | const std::map<T, std::vector<size_t> >& getInfoIndexMap() const {return indexGlobalOnServer_; } |
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45 | |
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46 | /** Default destructor */ |
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47 | virtual ~CClientClientDHTTemplate(); |
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48 | |
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49 | protected: |
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50 | // Redistribute index and info among clients |
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51 | void computeDistributedIndex(const boost::unordered_map<size_t,T>& indexInfoInitMap, |
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52 | const MPI_Comm& intraCommLevel, |
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53 | int level); |
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54 | |
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55 | void computeHashIndex(std::vector<size_t>& indexClientHash, int nbClient); |
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56 | |
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57 | void computeIndexInfoMappingLevel(const CArray<size_t,1>& indices, |
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58 | const MPI_Comm& intraCommLevel, |
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59 | int level); |
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60 | |
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61 | protected: |
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62 | void probeIndexMessageFromClients(unsigned long* recvIndexGlobalBuff, |
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63 | const int recvNbIndexCount, |
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64 | int& countIndexGlobal, |
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65 | std::map<int, unsigned long*>& indexGlobalBuffBegin, |
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66 | std::map<int, MPI_Request>& requestRecvIndexGlobal, |
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67 | const MPI_Comm& intraComm); |
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68 | |
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69 | void probeInfoMessageFromClients(InfoType* recvIndexServerBuff, |
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70 | const int recvNbIndexCount, |
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71 | int& countIndexServer, |
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72 | std::map<int, InfoType*>& indexServerBuffBegin, |
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73 | std::map<int, MPI_Request>& requestRecvIndexServer, |
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74 | const MPI_Comm& intraComm); |
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75 | |
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76 | // Send server index to clients |
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77 | void sendInfoToClients(int clientDestRank, std::vector<InfoType>& indexServer, |
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78 | const MPI_Comm& clientIntraComm, std::list<MPI_Request>& requestSendIndexServer); |
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79 | |
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80 | // Send global index to clients |
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81 | void sendIndexToClients(int clientDestRank, std::vector<size_t>& indexGlobal, |
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82 | const MPI_Comm& clientIntraComm, std::list<MPI_Request>& requestSendIndexGlobal); |
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83 | |
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84 | // Verify sending request |
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85 | void testSendRequest(std::list<MPI_Request>& sendRequest); |
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86 | |
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87 | // Compute size of receiving buffer for global index |
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88 | int computeBuffCountIndex(MPI_Request& requestRecv); |
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89 | |
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90 | // Compute size of receiving buffer for server index |
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91 | int computeBuffCountInfo(MPI_Request& requestRecv); |
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92 | |
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93 | protected: |
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94 | //! Mapping of global index to the corresponding client |
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95 | boost::unordered_map<size_t,InfoType> index2InfoMapping_; |
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96 | |
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97 | //! A temporary mapping of index to the corresponding information in each level of hierarchy |
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98 | boost::unordered_map<size_t,InfoType> indexToInfoMappingLevel_; |
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99 | |
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100 | //! Global index of data on SERVER, which are calculated by client(s) |
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101 | std::map<int, std::vector<size_t> > indexGlobalOnServer_; |
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102 | |
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103 | //! intracommuntion of clients |
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104 | MPI_Comm intraCommRoot_; |
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105 | |
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106 | //! Flag to specify whether data is distributed or not |
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107 | bool isDataDistributed_; |
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108 | }; |
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109 | |
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110 | typedef CClientClientDHTTemplate<int> CClientClientDHTInt; |
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111 | |
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112 | } // namespace xios |
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113 | #endif // __XIOS_CLIENT_CLIENT_DHT_TEMPLATE_HPP__ |
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