[1134] | 1 | /*! |
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| 2 | \file ep_reduce.cpp |
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| 3 | \since 2 may 2016 |
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| 4 | |
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| 5 | \brief Definitions of MPI collective function: MPI_Reduce, MPI_Allreduce |
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| 6 | */ |
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| 7 | |
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| 8 | #include "ep_lib.hpp" |
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| 9 | #include <mpi.h> |
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| 10 | #include "ep_declaration.hpp" |
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[1295] | 11 | #include "ep_mpi.hpp" |
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[1134] | 12 | |
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| 13 | using namespace std; |
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| 14 | |
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| 15 | |
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| 16 | namespace ep_lib { |
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| 17 | |
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| 18 | template<typename T> |
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| 19 | T max_op(T a, T b) |
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| 20 | { |
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| 21 | return max(a,b); |
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| 22 | } |
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| 23 | |
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| 24 | template<typename T> |
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| 25 | T min_op(T a, T b) |
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| 26 | { |
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| 27 | return min(a,b); |
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| 28 | } |
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| 29 | |
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[1295] | 30 | template<typename T> |
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| 31 | void reduce_max(const T * buffer, T* recvbuf, int count) |
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| 32 | { |
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| 33 | transform(buffer, buffer+count, recvbuf, recvbuf, max_op<T>); |
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| 34 | } |
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[1134] | 35 | |
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[1295] | 36 | template<typename T> |
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| 37 | void reduce_min(const T * buffer, T* recvbuf, int count) |
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[1134] | 38 | { |
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[1295] | 39 | transform(buffer, buffer+count, recvbuf, recvbuf, min_op<T>); |
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[1134] | 40 | } |
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| 41 | |
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[1295] | 42 | template<typename T> |
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| 43 | void reduce_sum(const T * buffer, T* recvbuf, int count) |
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| 44 | { |
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| 45 | transform(buffer, buffer+count, recvbuf, recvbuf, std::plus<T>()); |
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| 46 | } |
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[1134] | 47 | |
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[1295] | 48 | int MPI_Reduce_local(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int local_root, MPI_Comm comm) |
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[1134] | 49 | { |
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[1295] | 50 | assert(valid_type(datatype)); |
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| 51 | assert(valid_op(op)); |
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[1134] | 52 | |
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[1295] | 53 | ::MPI_Aint datasize, lb; |
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| 54 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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[1134] | 55 | |
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[1295] | 56 | int ep_rank = comm.ep_comm_ptr->size_rank_info[0].first; |
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| 57 | int ep_rank_loc = comm.ep_comm_ptr->size_rank_info[1].first; |
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| 58 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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[1134] | 59 | |
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[1295] | 60 | #pragma omp critical (_reduce) |
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| 61 | comm.my_buffer->void_buffer[ep_rank_loc] = const_cast< void* >(sendbuf); |
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[1134] | 62 | |
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[1295] | 63 | MPI_Barrier_local(comm); |
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[1134] | 64 | |
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[1295] | 65 | if(ep_rank_loc == local_root) |
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[1134] | 66 | { |
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| 67 | |
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[1295] | 68 | memcpy(recvbuf, comm.my_buffer->void_buffer[0], datasize * count); |
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[1289] | 69 | |
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[1295] | 70 | if(op == MPI_MAX) |
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[1134] | 71 | { |
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[1295] | 72 | if(datatype == MPI_INT) |
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[1134] | 73 | { |
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[1295] | 74 | assert(datasize == sizeof(int)); |
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| 75 | for(int i=1; i<num_ep; i++) |
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| 76 | reduce_max<int>(static_cast<int*>(comm.my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 77 | } |
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[1134] | 78 | |
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[1295] | 79 | else if(datatype == MPI_FLOAT) |
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| 80 | { |
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| 81 | assert(datasize == sizeof(float)); |
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| 82 | for(int i=1; i<num_ep; i++) |
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| 83 | reduce_max<float>(static_cast<float*>(comm.my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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| 84 | } |
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[1134] | 85 | |
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[1295] | 86 | else if(datatype == MPI_DOUBLE) |
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| 87 | { |
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| 88 | assert(datasize == sizeof(double)); |
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| 89 | for(int i=1; i<num_ep; i++) |
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| 90 | reduce_max<double>(static_cast<double*>(comm.my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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| 91 | } |
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[1134] | 92 | |
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[1295] | 93 | else if(datatype == MPI_CHAR) |
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| 94 | { |
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| 95 | assert(datasize == sizeof(char)); |
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| 96 | for(int i=1; i<num_ep; i++) |
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| 97 | reduce_max<char>(static_cast<char*>(comm.my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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| 98 | } |
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[1134] | 99 | |
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[1295] | 100 | else if(datatype == MPI_LONG) |
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| 101 | { |
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| 102 | assert(datasize == sizeof(long)); |
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| 103 | for(int i=1; i<num_ep; i++) |
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| 104 | reduce_max<long>(static_cast<long*>(comm.my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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[1134] | 105 | } |
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| 106 | |
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[1295] | 107 | else if(datatype == MPI_UNSIGNED_LONG) |
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| 108 | { |
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| 109 | assert(datasize == sizeof(unsigned long)); |
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| 110 | for(int i=1; i<num_ep; i++) |
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| 111 | reduce_max<unsigned long>(static_cast<unsigned long*>(comm.my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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| 112 | } |
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[1134] | 113 | |
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[1295] | 114 | else printf("datatype Error\n"); |
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[1134] | 115 | |
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| 116 | } |
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| 117 | |
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[1295] | 118 | if(op == MPI_MIN) |
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[1134] | 119 | { |
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[1295] | 120 | if(datatype ==MPI_INT) |
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[1134] | 121 | { |
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[1295] | 122 | assert(datasize == sizeof(int)); |
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| 123 | for(int i=1; i<num_ep; i++) |
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| 124 | reduce_min<int>(static_cast<int*>(comm.my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 125 | } |
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[1134] | 126 | |
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[1295] | 127 | else if(datatype == MPI_FLOAT) |
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| 128 | { |
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| 129 | assert(datasize == sizeof(float)); |
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| 130 | for(int i=1; i<num_ep; i++) |
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| 131 | reduce_min<float>(static_cast<float*>(comm.my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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| 132 | } |
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[1134] | 133 | |
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[1295] | 134 | else if(datatype == MPI_DOUBLE) |
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| 135 | { |
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| 136 | assert(datasize == sizeof(double)); |
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| 137 | for(int i=1; i<num_ep; i++) |
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| 138 | reduce_min<double>(static_cast<double*>(comm.my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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| 139 | } |
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[1134] | 140 | |
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[1295] | 141 | else if(datatype == MPI_CHAR) |
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| 142 | { |
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| 143 | assert(datasize == sizeof(char)); |
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| 144 | for(int i=1; i<num_ep; i++) |
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| 145 | reduce_min<char>(static_cast<char*>(comm.my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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| 146 | } |
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[1134] | 147 | |
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[1295] | 148 | else if(datatype == MPI_LONG) |
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| 149 | { |
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| 150 | assert(datasize == sizeof(long)); |
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| 151 | for(int i=1; i<num_ep; i++) |
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| 152 | reduce_min<long>(static_cast<long*>(comm.my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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| 153 | } |
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[1134] | 154 | |
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[1295] | 155 | else if(datatype == MPI_UNSIGNED_LONG) |
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| 156 | { |
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| 157 | assert(datasize == sizeof(unsigned long)); |
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| 158 | for(int i=1; i<num_ep; i++) |
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| 159 | reduce_min<unsigned long>(static_cast<unsigned long*>(comm.my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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[1134] | 160 | } |
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| 161 | |
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[1295] | 162 | else printf("datatype Error\n"); |
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[1134] | 163 | |
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| 164 | } |
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| 165 | |
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| 166 | |
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[1295] | 167 | if(op == MPI_SUM) |
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[1134] | 168 | { |
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[1295] | 169 | if(datatype==MPI_INT) |
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| 170 | { |
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| 171 | assert(datasize == sizeof(int)); |
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| 172 | for(int i=1; i<num_ep; i++) |
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| 173 | reduce_sum<int>(static_cast<int*>(comm.my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 174 | } |
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[1289] | 175 | |
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[1295] | 176 | else if(datatype == MPI_FLOAT) |
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| 177 | { |
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| 178 | assert(datasize == sizeof(float)); |
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| 179 | for(int i=1; i<num_ep; i++) |
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| 180 | reduce_sum<float>(static_cast<float*>(comm.my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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| 181 | } |
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[1289] | 182 | |
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[1295] | 183 | else if(datatype == MPI_DOUBLE) |
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[1287] | 184 | { |
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[1295] | 185 | assert(datasize == sizeof(double)); |
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| 186 | for(int i=1; i<num_ep; i++) |
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| 187 | reduce_sum<double>(static_cast<double*>(comm.my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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| 188 | } |
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[1134] | 189 | |
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[1295] | 190 | else if(datatype == MPI_CHAR) |
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| 191 | { |
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| 192 | assert(datasize == sizeof(char)); |
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| 193 | for(int i=1; i<num_ep; i++) |
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| 194 | reduce_sum<char>(static_cast<char*>(comm.my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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| 195 | } |
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[1289] | 196 | |
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[1295] | 197 | else if(datatype == MPI_LONG) |
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| 198 | { |
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| 199 | assert(datasize == sizeof(long)); |
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| 200 | for(int i=1; i<num_ep; i++) |
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| 201 | reduce_sum<long>(static_cast<long*>(comm.my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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[1287] | 202 | } |
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[1134] | 203 | |
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[1295] | 204 | else if(datatype ==MPI_UNSIGNED_LONG) |
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[1134] | 205 | { |
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[1295] | 206 | assert(datasize == sizeof(unsigned long)); |
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| 207 | for(int i=1; i<num_ep; i++) |
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| 208 | reduce_sum<unsigned long>(static_cast<unsigned long*>(comm.my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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[1287] | 209 | } |
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[1134] | 210 | |
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[1295] | 211 | else printf("datatype Error\n"); |
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[1289] | 212 | |
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| 213 | } |
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| 214 | } |
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| 215 | |
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[1295] | 216 | MPI_Barrier_local(comm); |
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[1289] | 217 | |
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[1134] | 218 | } |
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| 219 | |
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| 220 | |
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| 221 | int MPI_Reduce(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm) |
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| 222 | { |
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[1295] | 223 | |
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[1134] | 224 | if(!comm.is_ep && comm.mpi_comm) |
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| 225 | { |
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[1295] | 226 | return ::MPI_Reduce(sendbuf, recvbuf, count, to_mpi_type(datatype), to_mpi_op(op), root, to_mpi_comm(comm.mpi_comm)); |
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[1134] | 227 | } |
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| 228 | |
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| 229 | |
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| 230 | |
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[1295] | 231 | int ep_rank = comm.ep_comm_ptr->size_rank_info[0].first; |
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| 232 | int ep_rank_loc = comm.ep_comm_ptr->size_rank_info[1].first; |
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| 233 | int mpi_rank = comm.ep_comm_ptr->size_rank_info[2].first; |
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| 234 | int ep_size = comm.ep_comm_ptr->size_rank_info[0].second; |
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| 235 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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| 236 | int mpi_size = comm.ep_comm_ptr->size_rank_info[2].second; |
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| 237 | |
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[1134] | 238 | int root_mpi_rank = comm.rank_map->at(root).second; |
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| 239 | int root_ep_loc = comm.rank_map->at(root).first; |
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| 240 | |
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[1295] | 241 | ::MPI_Aint datasize, lb; |
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[1134] | 242 | |
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[1365] | 243 | ::MPI_Type_get_extent(*(static_cast< ::MPI_Datatype*>(datatype)), &lb, &datasize); |
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[1134] | 244 | |
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[1295] | 245 | bool is_master = (ep_rank_loc==0 && mpi_rank != root_mpi_rank ) || ep_rank == root; |
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| 246 | bool is_root = ep_rank == root; |
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[1134] | 247 | |
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[1295] | 248 | void* local_recvbuf; |
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[1134] | 249 | |
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[1295] | 250 | if(is_master) |
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[1134] | 251 | { |
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[1295] | 252 | local_recvbuf = new void*[datasize * count]; |
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[1134] | 253 | } |
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| 254 | |
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[1295] | 255 | if(mpi_rank == root_mpi_rank) MPI_Reduce_local(sendbuf, local_recvbuf, count, datatype, op, root_ep_loc, comm); |
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| 256 | else MPI_Reduce_local(sendbuf, local_recvbuf, count, datatype, op, 0, comm); |
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[1134] | 257 | |
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| 258 | |
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| 259 | |
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[1295] | 260 | if(is_master) |
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[1134] | 261 | { |
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[1295] | 262 | ::MPI_Reduce(local_recvbuf, recvbuf, count, to_mpi_type(datatype), to_mpi_op(op), root_mpi_rank, to_mpi_comm(comm.mpi_comm)); |
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| 263 | |
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[1134] | 264 | } |
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| 265 | |
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[1295] | 266 | if(is_master) |
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[1134] | 267 | { |
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[1295] | 268 | delete[] local_recvbuf; |
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[1134] | 269 | } |
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| 270 | |
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[1295] | 271 | MPI_Barrier_local(comm); |
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[1134] | 272 | } |
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| 273 | |
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| 274 | |
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| 275 | } |
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| 276 | |
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