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 | 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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35 | |
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36 | template<typename T> |
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37 | void reduce_min(const T * buffer, T* recvbuf, int count) |
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38 | { |
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39 | transform(buffer, buffer+count, recvbuf, recvbuf, min_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_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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47 | |
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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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49 | { |
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50 | assert(valid_type(datatype)); |
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51 | assert(valid_op(op)); |
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52 | |
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53 | ::MPI_Aint datasize, lb; |
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54 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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55 | |
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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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59 | |
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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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62 | |
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63 | MPI_Barrier_local(comm); |
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64 | |
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65 | if(ep_rank_loc == local_root) |
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66 | { |
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67 | |
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68 | memcpy(recvbuf, comm.my_buffer->void_buffer[0], datasize * count); |
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69 | |
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70 | if(op == MPI_MAX) |
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71 | { |
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72 | if(datatype == MPI_INT) |
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73 | { |
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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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78 | |
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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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85 | |
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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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92 | |
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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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99 | |
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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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105 | } |
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106 | |
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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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113 | |
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114 | else printf("datatype Error\n"); |
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115 | |
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116 | } |
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117 | |
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118 | if(op == MPI_MIN) |
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119 | { |
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120 | if(datatype ==MPI_INT) |
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121 | { |
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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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126 | |
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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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133 | |
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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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140 | |
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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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147 | |
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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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154 | |
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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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160 | } |
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161 | |
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162 | else printf("datatype Error\n"); |
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163 | |
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164 | } |
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165 | |
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166 | |
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167 | if(op == MPI_SUM) |
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168 | { |
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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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175 | |
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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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182 | |
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183 | else if(datatype == MPI_DOUBLE) |
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184 | { |
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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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189 | |
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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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196 | |
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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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202 | } |
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203 | |
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204 | else if(datatype ==MPI_UNSIGNED_LONG) |
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205 | { |
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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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209 | } |
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210 | |
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211 | else printf("datatype Error\n"); |
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212 | |
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213 | } |
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214 | } |
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215 | |
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216 | MPI_Barrier_local(comm); |
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217 | |
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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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223 | |
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224 | if(!comm.is_ep && comm.mpi_comm) |
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225 | { |
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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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227 | } |
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228 | |
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229 | |
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230 | |
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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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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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241 | ::MPI_Aint datasize, lb; |
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242 | |
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243 | ::MPI_Type_get_extent(*(static_cast< ::MPI_Datatype*>(datatype)), &lb, &datasize); |
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244 | |
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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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247 | |
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248 | void* local_recvbuf; |
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249 | |
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250 | if(is_master) |
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251 | { |
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252 | local_recvbuf = new void*[datasize * count]; |
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253 | } |
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254 | |
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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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257 | |
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258 | |
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259 | |
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260 | if(is_master) |
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261 | { |
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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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264 | } |
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265 | |
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266 | if(is_master) |
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267 | { |
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268 | delete[] local_recvbuf; |
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269 | } |
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270 | |
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271 | MPI_Barrier_local(comm); |
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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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