[553] | 1 | /*! |
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| 2 | \file server_distribution_description.hpp |
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| 3 | \author Ha NGUYEN |
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| 4 | \since 04 Jan 2015 |
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[569] | 5 | \date 09 Mars 2015 |
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[553] | 6 | |
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| 7 | \brief Description of index distribution on server(s). |
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| 8 | */ |
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| 9 | |
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| 10 | #include "server_distribution_description.hpp" |
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| 11 | |
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| 12 | namespace xios |
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| 13 | { |
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| 14 | CServerDistributionDescription::CServerDistributionDescription(const std::vector<int>& globalDimensionSize) |
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[568] | 15 | : nGlobal_(globalDimensionSize), indexBegin_(), dimensionSizes_(), globalIndex_(), vecGlobalIndex_() |
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[553] | 16 | { |
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| 17 | } |
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| 18 | |
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| 19 | CServerDistributionDescription::~CServerDistributionDescription() |
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[653] | 20 | { /* Nothing to do */ } |
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[553] | 21 | |
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| 22 | /*! |
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| 23 | Compute pre-defined global index distribution of server(s). |
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| 24 | \param [in] nServer number of server |
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| 25 | \param [in] doComputeGlobalIndex flag to compute global index on each server. By default, false |
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| 26 | \param [in] serType type of server distribution. For now, we can distribute server by band or plan |
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| 27 | */ |
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| 28 | void CServerDistributionDescription::computeServerDistribution(int nServer, |
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| 29 | bool doComputeGlobalIndex, |
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| 30 | ServerDistributionType serType) |
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| 31 | { |
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| 32 | switch (serType) { |
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| 33 | case BAND_DISTRIBUTION: |
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| 34 | computeBandDistribution(nServer); |
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| 35 | break; |
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| 36 | default: |
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| 37 | break; |
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| 38 | } |
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| 39 | |
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| 40 | if (doComputeGlobalIndex) |
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| 41 | { |
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| 42 | vecGlobalIndex_.resize(nServer); |
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| 43 | int dim = nGlobal_.size(); |
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| 44 | std::vector<int> currentIndex(dim); |
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| 45 | |
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| 46 | for (int idxServer = 0; idxServer < nServer; ++idxServer) |
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| 47 | { |
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| 48 | size_t ssize = 1, idx = 0; |
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| 49 | for (int j = 0; j < dim; ++j) ssize *= dimensionSizes_[idxServer][j]; |
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[653] | 50 | vecGlobalIndex_[idxServer].resize(ssize); |
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[553] | 51 | |
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| 52 | std::vector<int> idxLoop(dim,0); |
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| 53 | |
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| 54 | int innerLoopSize = dimensionSizes_[idxServer][0]; |
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| 55 | |
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| 56 | while (idx<ssize) |
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| 57 | { |
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| 58 | for (int idxDim = 0; idxDim < dim-1; ++idxDim) |
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| 59 | { |
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| 60 | if (idxLoop[idxDim] == dimensionSizes_[idxServer][idxDim]) |
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| 61 | { |
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| 62 | idxLoop[idxDim] = 0; |
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| 63 | ++idxLoop[idxDim+1]; |
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| 64 | } |
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| 65 | } |
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| 66 | |
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| 67 | for (int idxDim = 1; idxDim < dim; ++idxDim) currentIndex[idxDim] = idxLoop[idxDim] + indexBegin_[idxServer][idxDim]; |
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| 68 | |
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| 69 | size_t mulDim, globalIndex; |
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| 70 | for (int j = 0; j < innerLoopSize; ++j) |
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| 71 | { |
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| 72 | mulDim = 1; |
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| 73 | globalIndex = j + indexBegin_[idxServer][0]; |
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| 74 | |
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| 75 | for (int k = 1; k < dim; ++k) |
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| 76 | { |
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| 77 | mulDim *= nGlobal_[k-1]; |
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[653] | 78 | globalIndex += currentIndex[k] * mulDim; |
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[553] | 79 | } |
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[653] | 80 | vecGlobalIndex_[idxServer](idx) = globalIndex; |
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[553] | 81 | ++idx; |
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| 82 | } |
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| 83 | idxLoop[0] += innerLoopSize; |
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| 84 | } |
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| 85 | } |
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| 86 | } |
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| 87 | } |
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| 88 | |
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[569] | 89 | /*! |
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| 90 | Compute global index assigned to a server with a range.E.g: if a grid has 100 points and |
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| 91 | there are 2 servers, the first one takes index from 0 to 49, the second has index from 50 to 99 |
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| 92 | \param [in] nServer number of server |
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| 93 | \param [in] indexBeginEnd begining and ending index of range |
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| 94 | \param [in] serType type of server distribution. For now, we can distribute server by band or plan |
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| 95 | */ |
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[568] | 96 | void CServerDistributionDescription::computeServerGlobalIndexInRange(int nServer, |
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| 97 | const std::pair<size_t, size_t>& indexBeginEnd, |
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| 98 | ServerDistributionType distributionType) |
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| 99 | { |
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| 100 | switch (distributionType) { |
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| 101 | case BAND_DISTRIBUTION: |
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| 102 | computeBandDistribution(nServer); |
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| 103 | break; |
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| 104 | default: |
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| 105 | break; |
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| 106 | } |
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| 107 | |
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| 108 | size_t indexBegin = indexBeginEnd.first; |
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| 109 | size_t indexEnd = indexBeginEnd.second; |
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| 110 | if (indexBegin > indexEnd) |
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| 111 | ERROR("CServerDistributionDescription::computeServerGlobalIndexInRange", |
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| 112 | << "Index begin is larger than index end"); |
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| 113 | |
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| 114 | int dim = nGlobal_.size(); |
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| 115 | std::vector<int> currentIndex(dim); |
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| 116 | |
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| 117 | for (int idxServer = 0; idxServer < nServer; ++idxServer) |
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| 118 | { |
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| 119 | size_t ssize = 1, idx = 0; |
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| 120 | for (int j = 0; j < dim; ++j) ssize *= dimensionSizes_[idxServer][j]; |
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| 121 | |
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| 122 | std::vector<int> idxLoop(dim,0); |
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| 123 | int innerLoopSize = dimensionSizes_[idxServer][0]; |
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| 124 | |
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| 125 | while (idx<ssize) |
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| 126 | { |
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| 127 | for (int idxDim = 0; idxDim < dim-1; ++idxDim) |
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| 128 | { |
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| 129 | if (idxLoop[idxDim] == dimensionSizes_[idxServer][idxDim]) |
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| 130 | { |
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| 131 | idxLoop[idxDim] = 0; |
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| 132 | ++idxLoop[idxDim+1]; |
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| 133 | } |
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| 134 | } |
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| 135 | |
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| 136 | for (int idxDim = 1; idxDim < dim; ++idxDim) currentIndex[idxDim] = idxLoop[idxDim] + indexBegin_[idxServer][idxDim]; |
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| 137 | |
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| 138 | size_t mulDim, globalIndex; |
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| 139 | for (int j = 0; j < innerLoopSize; ++j) |
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| 140 | { |
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| 141 | mulDim = 1; |
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| 142 | globalIndex = j + indexBegin_[idxServer][0]; |
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| 143 | |
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| 144 | for (int k = 1; k < dim; ++k) |
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| 145 | { |
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| 146 | mulDim *= nGlobal_[k-1]; |
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| 147 | globalIndex += (currentIndex[k])*mulDim; |
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| 148 | } |
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| 149 | if ((indexBegin <= globalIndex) && (globalIndex <= indexEnd)) |
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| 150 | globalIndex_.insert(std::make_pair<size_t,int>(globalIndex, idxServer)); |
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| 151 | ++idx; |
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| 152 | } |
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| 153 | idxLoop[0] += innerLoopSize; |
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| 154 | } |
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| 155 | } |
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| 156 | |
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| 157 | } |
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| 158 | |
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[553] | 159 | /*! |
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| 160 | Compute global index of servers with band distribution |
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| 161 | \param [in] nServer number of server |
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| 162 | */ |
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| 163 | void CServerDistributionDescription::computeBandDistribution(int nServer) |
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| 164 | { |
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| 165 | int dim = nGlobal_.size(); |
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[557] | 166 | indexBegin_.resize(nServer); |
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| 167 | dimensionSizes_.resize(nServer); |
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[553] | 168 | |
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| 169 | for (int i = 0; i< nServer; ++i) |
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| 170 | { |
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[557] | 171 | indexBegin_[i].resize(dim); |
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| 172 | dimensionSizes_[i].resize(dim); |
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[553] | 173 | } |
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| 174 | |
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| 175 | int njRangeSize; |
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| 176 | int nGlobTemp = 0; |
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| 177 | std::vector<int> njRangeBegin(nServer,0); |
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| 178 | std::vector<int> njRangeEnd(nServer,0); |
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| 179 | |
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| 180 | if (1<dim) nGlobTemp = nGlobal_[1]; |
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| 181 | else nGlobTemp = nGlobal_[0]; |
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| 182 | |
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| 183 | for (int i = 0; i < nServer; ++i) |
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| 184 | { |
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| 185 | if (0 < i) njRangeBegin[i] = njRangeEnd[i-1]; |
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| 186 | njRangeSize = nGlobTemp / nServer; |
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| 187 | if (i < nGlobTemp%nServer) ++njRangeSize; |
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| 188 | njRangeEnd[i] = njRangeSize + njRangeBegin[i]; |
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| 189 | } |
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| 190 | njRangeEnd[nServer-1] = nGlobTemp; |
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| 191 | |
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| 192 | for (int i = 0; i < nServer; ++i) |
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| 193 | { |
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| 194 | for (int j = 0; j < dim; ++j) |
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| 195 | { |
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| 196 | if (1 != j) |
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| 197 | { |
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| 198 | if (1 == dim) |
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| 199 | { |
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| 200 | indexBegin_[i][j] = njRangeBegin[i]; |
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| 201 | dimensionSizes_[i][j] = njRangeEnd[i] - njRangeBegin[i]; |
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| 202 | } |
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| 203 | else |
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| 204 | { |
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| 205 | indexBegin_[i][j] = 0; |
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| 206 | dimensionSizes_[i][j] = nGlobal_[j]; |
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| 207 | } |
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| 208 | } |
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| 209 | else |
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| 210 | { |
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| 211 | indexBegin_[i][j] = njRangeBegin[i]; |
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| 212 | dimensionSizes_[i][j] = njRangeEnd[i] - njRangeBegin[i]; |
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| 213 | } |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | |
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| 218 | /*! |
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| 219 | Get size of each dimension on distributed server |
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| 220 | \return size of dimensions on server(s) |
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| 221 | */ |
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| 222 | std::vector<std::vector<int> > CServerDistributionDescription::getServerDimensionSizes() const |
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| 223 | { |
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| 224 | return dimensionSizes_; |
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| 225 | } |
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| 226 | |
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| 227 | /*! |
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| 228 | Get index begin of each dimension on distributed server |
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| 229 | \return index begin of dimensions on server(s) |
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| 230 | */ |
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| 231 | std::vector<std::vector<int> > CServerDistributionDescription::getServerIndexBegin() const |
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| 232 | { |
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| 233 | return indexBegin_; |
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| 234 | } |
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| 235 | |
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| 236 | /*! |
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| 237 | Get global index on distributed server |
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| 238 | \return global index on server(s) |
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| 239 | */ |
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[653] | 240 | const std::vector<CArray<size_t,1> >& CServerDistributionDescription::getGlobalIndex() const |
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[553] | 241 | { |
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| 242 | return vecGlobalIndex_; |
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| 243 | } |
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| 244 | |
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[569] | 245 | /*! |
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| 246 | Get global index calculated by computeServerGlobalIndexInRange |
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| 247 | */ |
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[568] | 248 | const boost::unordered_map<size_t,int>& CServerDistributionDescription::getGlobalIndexRange() const |
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| 249 | { |
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| 250 | return globalIndex_; |
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| 251 | } |
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[553] | 252 | } // namespace xios |
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