1 | #ifndef __WINDOW_MANAGER_HPP__ |
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2 | #define __WINDOW_MANAGER_HPP__ |
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3 | |
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4 | #include <map> |
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5 | #include "mpi.hpp" |
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6 | #include "buffer_in.hpp" |
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7 | #include "buffer_out.hpp" |
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8 | #include "message.hpp" |
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9 | |
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10 | namespace xios |
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11 | { |
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12 | |
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13 | |
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14 | class CWindowManager |
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15 | { |
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16 | |
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17 | private : |
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18 | const MPI_Aint OFFSET_LOCK=0 ; |
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19 | const int SIZE_LOCK=sizeof(int) ; |
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20 | const MPI_Aint OFFSET_BUFFER_SIZE=OFFSET_LOCK+SIZE_LOCK ; |
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21 | const int SIZE_BUFFER_SIZE=sizeof(size_t) ; |
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22 | const MPI_Aint OFFSET_BUFFER=OFFSET_BUFFER_SIZE+SIZE_BUFFER_SIZE ; |
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23 | const int WINDOWS_LOCKED=-1 ; |
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24 | |
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25 | MPI_Win window_ ; |
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26 | void * winBuffer_ ; |
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27 | map<int,double> lastTimeLock_ ; |
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28 | const double latency_=0e-2 ; |
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29 | |
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30 | public : |
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31 | |
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32 | CWindowManager(MPI_Comm winComm, size_t bufferSize) |
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33 | { |
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34 | const MPI_Aint windowSize=bufferSize+OFFSET_BUFFER ; |
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35 | MPI_Win_allocate(windowSize, 1, MPI_INFO_NULL, winComm, &winBuffer_, &window_) ; |
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36 | int lock=0 ; |
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37 | size_t size=0 ; |
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38 | int commRank ; |
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39 | MPI_Comm_rank(winComm, &commRank) ; |
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40 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, commRank, 0, window_) ; |
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41 | MPI_Put(&lock, SIZE_LOCK, MPI_CHAR, commRank, OFFSET_LOCK, SIZE_LOCK, MPI_CHAR, window_) ; |
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42 | MPI_Put(&size, SIZE_BUFFER_SIZE, MPI_CHAR, commRank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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43 | MPI_Win_unlock(commRank, window_) ; |
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44 | MPI_Barrier(winComm) ; |
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45 | } |
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46 | |
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47 | void lockWindow(int rank, int state ) |
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48 | { |
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49 | int lock=state ; |
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50 | double time ; |
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51 | auto it=lastTimeLock_.find(rank) ; |
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52 | if (it == lastTimeLock_.end()) |
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53 | { |
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54 | lastTimeLock_[rank] = 0. ; |
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55 | it=lastTimeLock_.find(rank) ; |
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56 | } |
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57 | double& lastTime = it->second ; |
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58 | |
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59 | do |
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60 | { |
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61 | time=MPI_Wtime() ; |
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62 | while(time-lastTime < latency_) time=MPI_Wtime() ; |
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63 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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64 | MPI_Compare_and_swap(&WINDOWS_LOCKED, &state, &lock, MPI_INT, rank, OFFSET_LOCK, window_) ; |
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65 | MPI_Win_unlock(rank, window_) ; |
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66 | lastTime=MPI_Wtime() ; |
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67 | } while (lock!=state) ; |
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68 | |
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69 | |
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70 | } |
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71 | |
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72 | void lockWindowExclusive(int rank, int state ) |
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73 | { |
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74 | int lock=state ; |
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75 | double time ; |
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76 | auto it=lastTimeLock_.find(rank) ; |
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77 | if (it == lastTimeLock_.end()) |
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78 | { |
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79 | lastTimeLock_[rank] = 0. ; |
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80 | it=lastTimeLock_.find(rank) ; |
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81 | } |
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82 | double& lastTime = it->second ; |
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83 | |
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84 | do |
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85 | { |
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86 | time=MPI_Wtime() ; |
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87 | while(time-lastTime < latency_) time=MPI_Wtime() ; |
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88 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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89 | MPI_Compare_and_swap(&WINDOWS_LOCKED, &state, &lock, MPI_INT, rank, OFFSET_LOCK, window_) ; |
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90 | MPI_Win_unlock(rank, window_) ; |
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91 | lastTime=MPI_Wtime() ; |
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92 | } while (lock!=state) ; |
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93 | } |
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94 | |
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95 | void lockWindowExclusive(int rank) |
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96 | { |
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97 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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98 | } |
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99 | |
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100 | void lockWindowShared(int rank) |
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101 | { |
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102 | MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, window_) ; |
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103 | } |
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104 | |
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105 | void unlockWindow(int rank) |
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106 | { |
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107 | MPI_Win_unlock(rank, window_) ; |
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108 | } |
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109 | |
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110 | void flushWindow(int rank) |
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111 | { |
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112 | MPI_Win_flush(rank, window_) ; |
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113 | } |
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114 | |
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115 | void unlockWindow(int rank, int state ) |
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116 | { |
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117 | int lock ; |
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118 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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119 | MPI_Compare_and_swap(&state, &WINDOWS_LOCKED, &lock, MPI_INT, rank, OFFSET_LOCK, window_) ; |
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120 | MPI_Win_unlock(rank, window_) ; |
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121 | } |
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122 | |
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123 | template< class T > |
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124 | void updateToWindow(int rank, T* object, void (T::*dumpOut)(CBufferOut&) ) |
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125 | { |
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126 | CBufferOut buffer ; |
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127 | (object->*dumpOut)(buffer) ; |
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128 | size_t size=buffer.count() ; |
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129 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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130 | MPI_Put(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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131 | MPI_Put(buffer.start(), size, MPI_CHAR, rank,OFFSET_BUFFER, size, MPI_CHAR, window_) ; |
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132 | MPI_Win_unlock(rank, window_) ; |
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133 | } |
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134 | |
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135 | template< class T > |
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136 | void updateToLockedWindow(int rank, T* object, void (T::*dumpOut)(CBufferOut&) ) |
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137 | { |
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138 | CBufferOut buffer ; |
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139 | (object->*dumpOut)(buffer) ; |
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140 | size_t size=buffer.count() ; |
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141 | // MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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142 | MPI_Put(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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143 | MPI_Put(buffer.start(), size, MPI_CHAR, rank,OFFSET_BUFFER, size, MPI_CHAR, window_) ; |
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144 | // MPI_Win_unlock(rank, window_) ; |
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145 | } |
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146 | |
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147 | template< typename T > |
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148 | void updateFromWindow(int rank, T* object, void (T::*dumpIn)(CBufferIn&) ) |
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149 | { |
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150 | size_t size ; |
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151 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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152 | MPI_Get(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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153 | MPI_Win_flush(rank,window_) ; |
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154 | CBufferIn buffer(size) ; |
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155 | MPI_Get(buffer.start(), size, MPI_CHAR, rank,OFFSET_BUFFER, size, MPI_CHAR, window_) ; |
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156 | MPI_Win_unlock(rank, window_) ; |
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157 | (object->*dumpIn)(buffer) ; |
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158 | } |
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159 | |
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160 | template< typename T > |
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161 | void updateFromLockedWindow(int rank, T* object, void (T::*dumpIn)(CBufferIn&) ) |
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162 | { |
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163 | size_t size ; |
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164 | // MPI_Win_lock(MPI_LOCK_SHARED, rank, 0, window_) ; |
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165 | MPI_Get(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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166 | MPI_Win_flush(rank,window_) ; |
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167 | CBufferIn buffer(size) ; |
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168 | MPI_Get(buffer.start(), size, MPI_CHAR, rank,OFFSET_BUFFER, size, MPI_CHAR, window_) ; |
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169 | // MPI_Win_unlock(rank, window_) ; |
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170 | MPI_Win_flush(rank, window_) ; |
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171 | (object->*dumpIn)(buffer) ; |
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172 | } |
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173 | |
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174 | |
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175 | template< class T > |
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176 | void pushToWindow(int rank, T* object, void (T::*dumpOut)(CBufferOut&) ) |
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177 | { |
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178 | size_t size ; |
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179 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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180 | MPI_Get(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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181 | MPI_Win_flush(rank,window_) ; |
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182 | CBufferOut buffer ; |
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183 | (object->*dumpOut)(buffer) ; |
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184 | size_t bufferSize=buffer.count() ; |
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185 | size_t newSize = size + bufferSize; |
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186 | MPI_Put(&newSize, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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187 | MPI_Put(buffer.start(), bufferSize, MPI_CHAR, rank, OFFSET_BUFFER+size, bufferSize, MPI_CHAR, window_) ; |
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188 | MPI_Win_unlock(rank, window_) ; |
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189 | } |
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190 | |
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191 | template< typename T > |
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192 | void popFromWindow(int rank, T* object, void (T::*dumpIn)(CBufferIn&) ) |
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193 | { |
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194 | size_t size ; |
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195 | MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, window_) ; |
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196 | MPI_Get(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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197 | MPI_Win_flush(rank,window_) ; |
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198 | CBufferIn buffer(size) ; |
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199 | MPI_Get(buffer.start(), size, MPI_CHAR, rank,OFFSET_BUFFER, size, MPI_CHAR, window_) ; |
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200 | MPI_Win_flush(rank,window_) ; |
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201 | (object->*dumpIn)(buffer) ; |
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202 | |
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203 | size=buffer.remain() ; |
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204 | MPI_Put(&size, SIZE_BUFFER_SIZE, MPI_CHAR, rank, OFFSET_BUFFER_SIZE, SIZE_BUFFER_SIZE, MPI_CHAR, window_) ; |
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205 | MPI_Put(buffer.ptr(),buffer.remain(), MPI_CHAR, rank, OFFSET_BUFFER, buffer.remain(), MPI_CHAR, window_) ; |
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206 | MPI_Win_unlock(rank, window_) ; |
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207 | |
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208 | } |
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209 | |
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210 | ~CWindowManager() |
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211 | { |
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212 | MPI_Win_free(&window_) ; |
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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 | #endif |
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