[2547] | 1 | #ifndef __WINDOW_DYNAMIC_HPP__ |
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| 2 | #define __WINDOW_DYNAMIC_HPP__ |
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| 3 | |
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| 4 | #include <map> |
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| 5 | //#include "exception.hpp" |
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| 6 | #include "mpi.hpp" |
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| 7 | #include "cxios.hpp" |
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| 8 | #include <iostream> |
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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 CWindowDynamic |
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| 15 | { |
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| 16 | private: |
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| 17 | void * winBuffer_ ; |
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| 18 | const MPI_Aint OFFSET_LOCK=0 ; |
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| 19 | const int SIZE_LOCK=sizeof(long) ; |
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| 20 | const MPI_Aint OFFSET_BUFFER = SIZE_LOCK ; |
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| 21 | const MPI_Aint OFFSET_BUFFER_SIZE = SIZE_LOCK ; |
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| 22 | MPI_Aint bufferSize_ ; |
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| 23 | const double maxLatency_ = 1e-3 ; // 1ms latency maximum |
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| 24 | MPI_Win window_ ; |
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| 25 | MPI_Aint windowSize_ ; |
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| 26 | int winCommRank_ ; |
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| 27 | map<int,MPI_Aint> winBufferAddress_ ; |
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| 28 | |
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| 29 | |
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| 30 | public : |
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| 31 | |
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| 32 | void allocateBuffer(MPI_Aint size) |
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| 33 | { |
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| 34 | bufferSize_ = size ; |
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| 35 | windowSize_ = size+OFFSET_BUFFER_SIZE ; |
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| 36 | MPI_Alloc_mem(windowSize_, MPI_INFO_NULL, &winBuffer_) ; |
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| 37 | MPI_Aint& lock = *((MPI_Aint*)(static_cast<char*>(winBuffer_)+OFFSET_LOCK)) ; |
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| 38 | lock=0 ; |
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| 39 | } |
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| 40 | |
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| 41 | void create(MPI_Comm winComm) |
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| 42 | { |
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| 43 | MPI_Win_create_dynamic(MPI_INFO_NULL, winComm, &window_); |
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| 44 | CXios::getMpiGarbageCollector().registerWindow(window_) ; |
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| 45 | MPI_Barrier(winComm) ; |
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| 46 | MPI_Comm_rank(winComm, &winCommRank_) ; |
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| 47 | MPI_Win_lock_all(0, window_) ; |
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| 48 | } |
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| 49 | |
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| 50 | void lockAll() |
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| 51 | { |
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| 52 | MPI_Win_lock_all(0, window_) ; |
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| 53 | } |
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| 54 | |
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| 55 | void unlockAll() |
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| 56 | { |
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| 57 | MPI_Win_unlock_all(window_) ; |
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| 58 | } |
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| 59 | |
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| 60 | void setWinBufferAddress(MPI_Aint addr, int rank) |
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| 61 | { |
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| 62 | winBufferAddress_[rank]=addr ; |
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| 63 | } |
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| 64 | |
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| 65 | MPI_Aint getWinBufferAddress() |
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| 66 | { |
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| 67 | MPI_Aint ret ; |
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| 68 | MPI_Get_address(winBuffer_, &ret) ; |
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| 69 | return ret ; |
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| 70 | } |
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| 71 | |
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| 72 | void* getBufferAddress() |
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| 73 | { |
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| 74 | return static_cast<char*>(winBuffer_)+OFFSET_BUFFER_SIZE ; |
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| 75 | } |
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| 76 | |
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| 77 | bool tryLockExclusive(int rank) |
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| 78 | { |
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| 79 | long lock = 1; |
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| 80 | long unlock = 0; |
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| 81 | long state; |
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| 82 | |
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| 83 | int flag ; |
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| 84 | if (rank==winCommRank_) MPI_Win_sync(window_) ; |
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| 85 | MPI_Compare_and_swap(&lock, &unlock, &state, MPI_LONG, rank, winBufferAddress_[rank]+OFFSET_LOCK, window_) ; |
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| 86 | MPI_Win_flush(rank, window_); |
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| 87 | // if (rank==winCommRank_) MPI_Win_sync(window_) ; |
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| 88 | bool locked = (state == unlock) ; |
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| 89 | return locked ; |
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| 90 | } |
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| 91 | |
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| 92 | bool tryLockShared(int rank, MPI_Op op) |
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| 93 | { |
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| 94 | long one = 0x100000000; |
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| 95 | long res; |
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| 96 | |
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| 97 | MPI_Fetch_and_op(&one, &res, MPI_LONG, rank, winBufferAddress_[rank]+OFFSET_LOCK, op, window_); |
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| 98 | MPI_Win_flush(rank, window_); |
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| 99 | |
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| 100 | bool locked = ! (res & 1) ; |
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| 101 | return locked ; |
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| 102 | } |
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| 103 | |
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| 104 | void unlockExclusive(int rank) |
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| 105 | { |
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| 106 | int lock = 1; |
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| 107 | int unlock = 0; |
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| 108 | int state; |
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| 109 | |
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| 110 | if (rank==winCommRank_) MPI_Win_sync(window_) ; |
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| 111 | MPI_Win_flush(rank, window_); |
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| 112 | MPI_Compare_and_swap(&unlock, &lock, &state, MPI_INT, rank, winBufferAddress_[rank]+OFFSET_LOCK, window_) ; |
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| 113 | MPI_Win_flush(rank, window_); |
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| 114 | // if (rank==winCommRank_) MPI_Win_sync(window_) ; |
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| 115 | if (lock != state) |
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| 116 | { |
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| 117 | info(100)<<"Bad State : "<<((long*)winBuffer_)[0]<<endl ; |
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| 118 | ERROR("CWindowBase::unlockWindowExclusive",<<"unlockWindow failed: bad state"<<endl) ; |
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| 119 | } |
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| 120 | } |
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| 121 | |
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| 122 | void unlockShared(int rank) |
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| 123 | { |
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| 124 | int minusone = -1; |
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| 125 | int res; |
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| 126 | MPI_Fetch_and_op(&minusone, &res, MPI_INT, rank, winBufferAddress_[rank]+OFFSET_LOCK+4, MPI_SUM, window_); |
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| 127 | MPI_Win_flush(rank, window_); |
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| 128 | } |
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| 129 | |
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| 130 | void lockExclusive(int rank) |
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| 131 | { |
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| 132 | double time = MPI_Wtime() ; |
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| 133 | bool locked = tryLockExclusive(rank); |
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| 134 | double lastTime = MPI_Wtime() ; |
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| 135 | double delta = lastTime-time ; |
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| 136 | |
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| 137 | while (!locked) |
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| 138 | { |
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| 139 | time = MPI_Wtime() ; |
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| 140 | if (delta > maxLatency_) delta = maxLatency_ ; |
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| 141 | if (time >= lastTime+delta) |
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| 142 | { |
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| 143 | locked = tryLockExclusive(rank); |
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| 144 | delta=delta*2.; |
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| 145 | lastTime = time ; |
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| 146 | } |
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| 147 | } |
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| 148 | } |
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| 149 | |
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| 150 | void lockShared(int rank) |
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| 151 | { |
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| 152 | double time = MPI_Wtime() ; |
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| 153 | bool locked = tryLockShared(rank, MPI_SUM); |
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| 154 | double lastTime = MPI_Wtime() ; |
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| 155 | double delta = lastTime-time ; |
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| 156 | |
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| 157 | while (!locked) |
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| 158 | { |
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| 159 | time = MPI_Wtime() ; |
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| 160 | if (delta > maxLatency_) delta = maxLatency_ ; |
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| 161 | if (time >= lastTime+delta) |
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| 162 | { |
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| 163 | locked = tryLockShared(rank, MPI_NO_OP); |
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| 164 | delta=delta*2.; |
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| 165 | lastTime = time ; |
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| 166 | } |
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| 167 | } |
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| 168 | } |
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| 169 | |
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[2549] | 170 | void attach(MPI_Aint size) |
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[2547] | 171 | { |
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| 172 | windowSize_ = size+OFFSET_BUFFER_SIZE ; |
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| 173 | MPI_Alloc_mem(windowSize_, MPI_INFO_NULL, &winBuffer_) ; |
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| 174 | MPI_Aint& lock = *((MPI_Aint*)(static_cast<char*>(winBuffer_)+OFFSET_LOCK)) ; |
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| 175 | lock=0 ; |
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| 176 | MPI_Win_attach(window_, winBuffer_, size+OFFSET_BUFFER_SIZE) ; |
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| 177 | setWinBufferAddress(getWinBufferAddress(),winCommRank_) ; |
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| 178 | } |
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| 179 | |
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[2549] | 180 | void attach() |
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[2547] | 181 | { |
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| 182 | MPI_Win_attach(window_, winBuffer_, windowSize_) ; |
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| 183 | setWinBufferAddress(getWinBufferAddress(),winCommRank_) ; |
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| 184 | } |
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| 185 | |
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[2549] | 186 | void detach() |
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[2547] | 187 | { |
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| 188 | MPI_Win_detach(window_, winBuffer_) ; |
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| 189 | MPI_Free_mem(winBuffer_) ; |
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| 190 | } |
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| 191 | |
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| 192 | int flush(int rank) |
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| 193 | { |
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| 194 | return MPI_Win_flush(rank, window_) ; |
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| 195 | } |
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| 196 | |
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| 197 | int put(const void *origin_addr, int origin_count, MPI_Datatype origin_datatype, int target_rank, MPI_Aint target_disp, |
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| 198 | int target_count, MPI_Datatype target_datatype) |
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| 199 | { |
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| 200 | return MPI_Put(origin_addr, origin_count, origin_datatype, target_rank, target_disp + OFFSET_BUFFER, target_count, target_datatype, window_) ; |
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| 201 | } |
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| 202 | |
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| 203 | int get(void *origin_addr, int origin_count, MPI_Datatype origin_datatype, int target_rank, MPI_Aint target_disp, |
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| 204 | int target_count, MPI_Datatype target_datatype) |
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| 205 | { |
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| 206 | return MPI_Get(origin_addr, origin_count, origin_datatype, target_rank, target_disp + OFFSET_BUFFER, target_count, target_datatype, window_) ; |
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| 207 | } |
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| 208 | |
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| 209 | int compareAndSwap(const void *origin_addr, const void *compare_addr, void *result_addr, MPI_Datatype datatype, |
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| 210 | int target_rank, MPI_Aint target_disp) |
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| 211 | { |
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| 212 | return MPI_Compare_and_swap(origin_addr, compare_addr, result_addr, datatype, target_rank, target_disp + OFFSET_BUFFER, window_) ; |
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| 213 | } |
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| 214 | |
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| 215 | ~CWindowDynamic() |
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| 216 | { |
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| 217 | MPI_Win_unlock_all(window_) ; |
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| 218 | } |
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| 219 | |
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| 220 | } ; |
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| 221 | } |
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| 222 | |
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| 223 | |
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| 224 | |
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| 225 | #endif |
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