[1603] | 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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| 11 | #include "ep_mpi.hpp" |
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| 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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| 30 | template<typename T> |
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| 31 | T lor_op(T a, T b) |
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| 32 | { |
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| 33 | return a||b; |
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| 34 | } |
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| 35 | |
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| 36 | template<typename T> |
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| 37 | void reduce_max(const T * buffer, T* recvbuf, int count) |
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| 38 | { |
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| 39 | transform(buffer, buffer+count, recvbuf, recvbuf, max_op<T>); |
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| 40 | } |
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| 41 | |
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| 42 | template<typename T> |
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| 43 | void reduce_min(const T * buffer, T* recvbuf, int count) |
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| 44 | { |
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| 45 | transform(buffer, buffer+count, recvbuf, recvbuf, min_op<T>); |
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| 46 | } |
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| 47 | |
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| 48 | template<typename T> |
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| 49 | void reduce_sum(const T * buffer, T* recvbuf, int count) |
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| 50 | { |
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| 51 | transform(buffer, buffer+count, recvbuf, recvbuf, std::plus<T>()); |
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| 52 | } |
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| 53 | |
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| 54 | template<typename T> |
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| 55 | void reduce_lor(const T * buffer, T* recvbuf, int count) |
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| 56 | { |
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| 57 | transform(buffer, buffer+count, recvbuf, recvbuf, lor_op<T>); |
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| 58 | } |
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| 59 | |
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| 60 | 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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| 61 | { |
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| 62 | assert(valid_type(datatype)); |
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| 63 | assert(valid_op(op)); |
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| 64 | |
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| 65 | ::MPI_Aint datasize, lb; |
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| 66 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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| 67 | |
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| 68 | int ep_rank = comm->ep_comm_ptr->size_rank_info[0].first; |
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| 69 | int ep_rank_loc = comm->ep_comm_ptr->size_rank_info[1].first; |
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| 70 | int num_ep = comm->ep_comm_ptr->size_rank_info[1].second; |
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| 71 | |
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| 72 | #pragma omp critical (_reduce) |
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| 73 | comm->my_buffer->void_buffer[ep_rank_loc] = const_cast< void* >(sendbuf); |
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| 74 | |
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| 75 | MPI_Barrier_local(comm); |
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| 76 | |
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| 77 | if(ep_rank_loc == local_root) |
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| 78 | { |
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| 79 | |
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| 80 | memcpy(recvbuf, comm->my_buffer->void_buffer[0], datasize * count); |
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| 81 | |
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| 82 | if(op == MPI_MAX) |
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| 83 | { |
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| 84 | if(datatype == MPI_INT) |
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| 85 | { |
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| 86 | assert(datasize == sizeof(int)); |
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| 87 | for(int i=1; i<num_ep; i++) |
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| 88 | reduce_max<int>(static_cast<int*>(comm->my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 89 | } |
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| 90 | |
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| 91 | else if(datatype == MPI_FLOAT) |
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| 92 | { |
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| 93 | assert(datasize == sizeof(float)); |
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| 94 | for(int i=1; i<num_ep; i++) |
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| 95 | reduce_max<float>(static_cast<float*>(comm->my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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| 96 | } |
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| 97 | |
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| 98 | else if(datatype == MPI_DOUBLE) |
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| 99 | { |
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| 100 | assert(datasize == sizeof(double)); |
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| 101 | for(int i=1; i<num_ep; i++) |
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| 102 | reduce_max<double>(static_cast<double*>(comm->my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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| 103 | } |
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| 104 | |
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| 105 | else if(datatype == MPI_CHAR) |
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| 106 | { |
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| 107 | assert(datasize == sizeof(char)); |
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| 108 | for(int i=1; i<num_ep; i++) |
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| 109 | reduce_max<char>(static_cast<char*>(comm->my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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| 110 | } |
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| 111 | |
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| 112 | else if(datatype == MPI_LONG) |
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| 113 | { |
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| 114 | assert(datasize == sizeof(long)); |
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| 115 | for(int i=1; i<num_ep; i++) |
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| 116 | reduce_max<long>(static_cast<long*>(comm->my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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| 117 | } |
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| 118 | |
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| 119 | else if(datatype == MPI_UNSIGNED_LONG) |
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| 120 | { |
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| 121 | assert(datasize == sizeof(unsigned long)); |
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| 122 | for(int i=1; i<num_ep; i++) |
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| 123 | reduce_max<unsigned long>(static_cast<unsigned long*>(comm->my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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| 124 | } |
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| 125 | |
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| 126 | else if(datatype == MPI_LONG_LONG_INT) |
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| 127 | { |
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| 128 | assert(datasize == sizeof(long long)); |
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| 129 | for(int i=1; i<num_ep; i++) |
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| 130 | reduce_max<long long>(static_cast<long long*>(comm->my_buffer->void_buffer[i]), static_cast<long long*>(recvbuf), count); |
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| 131 | } |
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| 132 | |
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| 133 | else |
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| 134 | { |
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| 135 | printf("datatype Error in ep_reduce : INT, FLOAT, DOUBLE, CHAR, LONG, UNSIGNED_LONG, LONG_LONG_INT\n"); |
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| 136 | MPI_Abort(comm, 0); |
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| 137 | } |
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| 138 | |
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| 139 | } |
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| 140 | |
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| 141 | else if(op == MPI_MIN) |
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| 142 | { |
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| 143 | if(datatype ==MPI_INT) |
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| 144 | { |
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| 145 | assert(datasize == sizeof(int)); |
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| 146 | for(int i=1; i<num_ep; i++) |
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| 147 | reduce_min<int>(static_cast<int*>(comm->my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 148 | } |
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| 149 | |
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| 150 | else if(datatype == MPI_FLOAT) |
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| 151 | { |
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| 152 | assert(datasize == sizeof(float)); |
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| 153 | for(int i=1; i<num_ep; i++) |
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| 154 | reduce_min<float>(static_cast<float*>(comm->my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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| 155 | } |
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| 156 | |
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| 157 | else if(datatype == MPI_DOUBLE) |
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| 158 | { |
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| 159 | assert(datasize == sizeof(double)); |
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| 160 | for(int i=1; i<num_ep; i++) |
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| 161 | reduce_min<double>(static_cast<double*>(comm->my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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| 162 | } |
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| 163 | |
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| 164 | else if(datatype == MPI_CHAR) |
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| 165 | { |
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| 166 | assert(datasize == sizeof(char)); |
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| 167 | for(int i=1; i<num_ep; i++) |
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| 168 | reduce_min<char>(static_cast<char*>(comm->my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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| 169 | } |
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| 170 | |
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| 171 | else if(datatype == MPI_LONG) |
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| 172 | { |
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| 173 | assert(datasize == sizeof(long)); |
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| 174 | for(int i=1; i<num_ep; i++) |
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| 175 | reduce_min<long>(static_cast<long*>(comm->my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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| 176 | } |
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| 177 | |
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| 178 | else if(datatype == MPI_UNSIGNED_LONG) |
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| 179 | { |
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| 180 | assert(datasize == sizeof(unsigned long)); |
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| 181 | for(int i=1; i<num_ep; i++) |
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| 182 | reduce_min<unsigned long>(static_cast<unsigned long*>(comm->my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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| 183 | } |
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| 184 | |
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| 185 | else if(datatype == MPI_LONG_LONG_INT) |
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| 186 | { |
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| 187 | assert(datasize == sizeof(long long)); |
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| 188 | for(int i=1; i<num_ep; i++) |
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| 189 | reduce_min<long long>(static_cast<long long*>(comm->my_buffer->void_buffer[i]), static_cast<long long*>(recvbuf), count); |
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| 190 | } |
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| 191 | |
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| 192 | else |
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| 193 | { |
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| 194 | printf("datatype Error in ep_reduce : INT, FLOAT, DOUBLE, CHAR, LONG, UNSIGNED_LONG, LONG_LONG_INT\n"); |
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| 195 | MPI_Abort(comm, 0); |
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| 196 | } |
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| 197 | |
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| 198 | } |
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| 199 | |
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| 200 | |
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| 201 | else if(op == MPI_SUM) |
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| 202 | { |
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| 203 | if(datatype==MPI_INT) |
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| 204 | { |
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| 205 | assert(datasize == sizeof(int)); |
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| 206 | for(int i=1; i<num_ep; i++) |
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| 207 | reduce_sum<int>(static_cast<int*>(comm->my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 208 | } |
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| 209 | |
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| 210 | else if(datatype == MPI_FLOAT) |
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| 211 | { |
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| 212 | assert(datasize == sizeof(float)); |
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| 213 | for(int i=1; i<num_ep; i++) |
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| 214 | reduce_sum<float>(static_cast<float*>(comm->my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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| 215 | } |
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| 216 | |
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| 217 | else if(datatype == MPI_DOUBLE) |
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| 218 | { |
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| 219 | assert(datasize == sizeof(double)); |
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| 220 | for(int i=1; i<num_ep; i++) |
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| 221 | reduce_sum<double>(static_cast<double*>(comm->my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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| 222 | } |
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| 223 | |
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| 224 | else if(datatype == MPI_CHAR) |
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| 225 | { |
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| 226 | assert(datasize == sizeof(char)); |
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| 227 | for(int i=1; i<num_ep; i++) |
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| 228 | reduce_sum<char>(static_cast<char*>(comm->my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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| 229 | } |
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| 230 | |
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| 231 | else if(datatype == MPI_LONG) |
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| 232 | { |
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| 233 | assert(datasize == sizeof(long)); |
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| 234 | for(int i=1; i<num_ep; i++) |
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| 235 | reduce_sum<long>(static_cast<long*>(comm->my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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| 236 | } |
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| 237 | |
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| 238 | else if(datatype ==MPI_UNSIGNED_LONG) |
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| 239 | { |
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| 240 | assert(datasize == sizeof(unsigned long)); |
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| 241 | for(int i=1; i<num_ep; i++) |
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| 242 | reduce_sum<unsigned long>(static_cast<unsigned long*>(comm->my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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| 243 | } |
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| 244 | |
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| 245 | else if(datatype ==MPI_LONG_LONG_INT) |
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| 246 | { |
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| 247 | assert(datasize == sizeof(long long)); |
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| 248 | for(int i=1; i<num_ep; i++) |
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| 249 | reduce_sum<long long>(static_cast<long long*>(comm->my_buffer->void_buffer[i]), static_cast<long long*>(recvbuf), count); |
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| 250 | } |
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| 251 | |
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| 252 | else |
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| 253 | { |
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| 254 | printf("datatype Error in ep_reduce : INT, FLOAT, DOUBLE, CHAR, LONG, UNSIGNED_LONG, LONG_LONG_INT\n"); |
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| 255 | MPI_Abort(comm, 0); |
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| 256 | } |
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| 257 | |
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| 258 | } |
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| 259 | |
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| 260 | else if(op == MPI_LOR) |
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| 261 | { |
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| 262 | if(datatype != MPI_INT) |
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| 263 | printf("datatype Error, must be MPI_INT\n"); |
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| 264 | else |
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| 265 | { |
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| 266 | assert(datasize == sizeof(int)); |
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| 267 | for(int i=1; i<num_ep; i++) |
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| 268 | reduce_lor<int>(static_cast<int*>(comm->my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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| 269 | } |
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| 270 | } |
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| 271 | |
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| 272 | else |
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| 273 | { |
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| 274 | printf("op type Error in ep_reduce : MPI_MAX, MPI_MIN, MPI_SUM, MPI_LOR\n"); |
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| 275 | MPI_Abort(comm, 0); |
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| 276 | } |
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| 277 | } |
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| 278 | |
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| 279 | MPI_Barrier_local(comm); |
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| 280 | |
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| 281 | } |
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| 282 | |
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| 283 | |
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| 284 | 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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| 285 | { |
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| 286 | |
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| 287 | if(!comm->is_ep) 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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| 288 | if(comm->is_intercomm) return MPI_Reduce_intercomm(sendbuf, recvbuf, count, datatype, op, root, comm); |
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| 289 | |
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| 290 | |
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| 291 | |
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| 292 | int ep_rank = comm->ep_comm_ptr->size_rank_info[0].first; |
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| 293 | int ep_rank_loc = comm->ep_comm_ptr->size_rank_info[1].first; |
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| 294 | int mpi_rank = comm->ep_comm_ptr->size_rank_info[2].first; |
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| 295 | int ep_size = comm->ep_comm_ptr->size_rank_info[0].second; |
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| 296 | int num_ep = comm->ep_comm_ptr->size_rank_info[1].second; |
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| 297 | int mpi_size = comm->ep_comm_ptr->size_rank_info[2].second; |
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| 298 | |
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| 299 | int root_mpi_rank = comm->ep_rank_map->at(root).second; |
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| 300 | int root_ep_loc = comm->ep_rank_map->at(root).first; |
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| 301 | |
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| 302 | ::MPI_Aint datasize, lb; |
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| 303 | |
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| 304 | ::MPI_Type_get_extent(*(static_cast< ::MPI_Datatype*>(datatype)), &lb, &datasize); |
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| 305 | |
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| 306 | bool is_master = (ep_rank_loc==0 && mpi_rank != root_mpi_rank ) || ep_rank == root; |
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| 307 | bool is_root = ep_rank == root; |
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| 308 | |
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| 309 | void* local_recvbuf; |
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| 310 | |
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| 311 | if(is_master) |
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| 312 | { |
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| 313 | local_recvbuf = new void*[datasize * count]; |
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| 314 | } |
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| 315 | |
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| 316 | if(mpi_rank == root_mpi_rank) MPI_Reduce_local(sendbuf, local_recvbuf, count, datatype, op, root_ep_loc, comm); |
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| 317 | else MPI_Reduce_local(sendbuf, local_recvbuf, count, datatype, op, 0, comm); |
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| 318 | |
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| 319 | |
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| 320 | |
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| 321 | if(is_master) |
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| 322 | { |
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| 323 | ::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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| 324 | |
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| 325 | } |
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| 326 | |
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| 327 | if(is_master) |
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| 328 | { |
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| 329 | delete[] local_recvbuf; |
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| 330 | } |
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| 331 | |
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| 332 | MPI_Barrier_local(comm); |
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| 333 | } |
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| 334 | |
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| 335 | |
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| 336 | int MPI_Reduce_intercomm(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, int root, MPI_Comm comm) |
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| 337 | { |
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| 338 | printf("MPI_Reduce_intercomm not yet implemented\n"); |
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| 339 | MPI_Abort(comm, 0); |
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| 340 | } |
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| 341 | } |
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| 342 | |
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