1 | /*! |
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2 | \file distribution_server.cpp |
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3 | \author Ha NGUYEN |
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4 | \since 13 Jan 2015 |
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5 | \date 10 Sep 2016 |
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6 | |
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7 | \brief Index distribution on server side. |
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8 | */ |
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9 | #include "distribution_server.hpp" |
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10 | #include "utils.hpp" |
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11 | |
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12 | namespace xios { |
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13 | |
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14 | CDistributionServer::CDistributionServer(int rank, int dims, const CArray<size_t,1>& globalIndex) |
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15 | : CDistribution(rank, dims, globalIndex), nGlobal_(), nZoomSize_(), nZoomBegin_(), globalLocalIndexMap_() |
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16 | { |
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17 | } |
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18 | |
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19 | CDistributionServer::CDistributionServer(int rank, const std::vector<int>& nZoomBegin, |
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20 | const std::vector<int>& nZoomSize, const std::vector<int>& nGlobal) |
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21 | : CDistribution(rank, nGlobal.size()), nGlobal_(nGlobal), nZoomSize_(nZoomSize), nZoomBegin_(nZoomBegin), globalLocalIndexMap_() |
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22 | { |
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23 | createGlobalIndex(); |
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24 | } |
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25 | |
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26 | CDistributionServer::CDistributionServer(int rank, const std::vector<int>& nZoomBegin, |
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27 | const std::vector<int>& nZoomSize, |
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28 | const std::vector<int>& nZoomBeginGlobal, |
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29 | const std::vector<int>& nGlobal) |
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30 | : CDistribution(rank, nGlobal.size()), nGlobal_(nGlobal), nZoomBeginGlobal_(nZoomBeginGlobal), |
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31 | nZoomSize_(nZoomSize), nZoomBegin_(nZoomBegin), globalLocalIndexMap_() |
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32 | { |
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33 | createGlobalIndex(); |
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34 | } |
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35 | |
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36 | CDistributionServer::~CDistributionServer() |
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37 | { |
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38 | } |
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39 | |
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40 | /*! |
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41 | Create global index on server side |
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42 | Like the similar function on client side, this function serves on creating global index |
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43 | for data written by the server. The global index is used to calculating local index of data |
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44 | written on each server |
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45 | */ |
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46 | void CDistributionServer::createGlobalIndex() |
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47 | { |
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48 | size_t idx = 0, ssize = 1; |
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49 | for (int i = 0; i < nZoomSize_.size(); ++i) ssize *= nZoomSize_[i]; |
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50 | |
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51 | this->globalIndex_.resize(ssize); |
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52 | std::vector<int> idxLoop(this->getDims(),0); |
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53 | std::vector<int> currentIndex(this->getDims()); |
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54 | int innerLoopSize = nZoomSize_[0]; |
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55 | |
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56 | globalLocalIndexMap_.rehash(std::ceil(ssize/globalLocalIndexMap_.max_load_factor())); |
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57 | while (idx<ssize) |
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58 | { |
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59 | for (int i = 0; i < this->dims_-1; ++i) |
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60 | { |
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61 | if (idxLoop[i] == nZoomSize_[i]) |
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62 | { |
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63 | idxLoop[i] = 0; |
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64 | ++idxLoop[i+1]; |
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65 | } |
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66 | } |
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67 | |
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68 | for (int i = 1; i < this->dims_; ++i) currentIndex[i] = idxLoop[i] + nZoomBegin_[i]; |
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69 | |
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70 | size_t mulDim, globalIndex; |
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71 | for (int i = 0; i < innerLoopSize; ++i) |
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72 | { |
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73 | mulDim = 1; |
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74 | globalIndex = i + nZoomBegin_[0]; |
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75 | |
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76 | for (int k = 1; k < this->dims_; ++k) |
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77 | { |
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78 | mulDim *= nGlobal_[k-1]; |
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79 | globalIndex += (currentIndex[k])*mulDim; |
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80 | } |
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81 | globalLocalIndexMap_[globalIndex] = idx; |
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82 | this->globalIndex_(idx) = globalIndex; |
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83 | |
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84 | ++idx; |
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85 | } |
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86 | idxLoop[0] += innerLoopSize; |
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87 | } |
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88 | } |
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89 | |
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90 | /*! |
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91 | Compute local index for writing data on server |
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92 | \param [in] globalIndex global index received from client |
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93 | \return local index of written data |
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94 | */ |
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95 | CArray<size_t,1> CDistributionServer::computeLocalIndex(const CArray<size_t,1>& globalIndex) |
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96 | { |
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97 | int ssize = globalIndex.numElements(); |
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98 | CArray<size_t,1> localIndex(ssize); |
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99 | GlobalLocalMap::const_iterator ite = globalLocalIndexMap_.end(), it; |
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100 | for (int idx = 0; idx < ssize; ++idx) |
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101 | { |
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102 | it = globalLocalIndexMap_.find(globalIndex(idx)); |
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103 | if (ite != it) |
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104 | localIndex(idx) = it->second; |
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105 | } |
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106 | |
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107 | return localIndex; |
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108 | } |
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109 | |
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110 | /*! |
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111 | Compute local index for writing data on server |
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112 | \param [in] globalIndex Global index received from client |
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113 | */ |
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114 | void CDistributionServer::computeLocalIndex(CArray<size_t,1>& globalIndex) |
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115 | { |
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116 | int ssize = globalIndex.numElements(); |
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117 | CArray<size_t,1> localIndex(ssize); |
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118 | GlobalLocalMap::const_iterator ite = globalLocalIndexMap_.end(), it; |
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119 | for (int idx = 0; idx < ssize; ++idx) |
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120 | { |
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121 | it = globalLocalIndexMap_.find(globalIndex(idx)); |
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122 | if (ite != it) |
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123 | localIndex(idx) = it->second; |
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124 | } |
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125 | |
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126 | globalIndex.reference(localIndex); |
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127 | } |
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128 | |
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129 | /*! |
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130 | Transforms local indexes owned by the server into global indexes |
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131 | \param [in/out] indexes on input, local indexes of the server, |
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132 | on output, the corresponding global indexes |
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133 | */ |
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134 | void CDistributionServer::computeGlobalIndex(CArray<int,1>& indexes) const |
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135 | { |
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136 | for (int i = 0; i < indexes.numElements(); ++i) |
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137 | { |
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138 | indexes(i) = globalIndex_(indexes(i)); |
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139 | } |
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140 | } |
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141 | |
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142 | |
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143 | const std::vector<int>& CDistributionServer::getZoomBeginGlobal() const |
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144 | { |
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145 | return nZoomBeginGlobal_; |
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146 | } |
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147 | |
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148 | const std::vector<int>& CDistributionServer::getZoomBeginServer() const |
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149 | { |
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150 | return nZoomBegin_; |
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151 | } |
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152 | |
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153 | const std::vector<int>& CDistributionServer::getZoomSizeServer() const |
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154 | { |
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155 | return nZoomSize_; |
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156 | } |
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157 | } // namespace xios |
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