1 | /*! |
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2 | \file ep_scan.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_Exscan |
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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 | namespace ep_lib |
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16 | { |
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17 | template<typename T> |
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18 | T max_op(T a, T b) |
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19 | { |
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20 | return max(a,b); |
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21 | } |
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22 | |
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23 | template<typename T> |
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24 | T min_op(T a, T b) |
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25 | { |
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26 | return min(a,b); |
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27 | } |
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28 | |
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29 | template<typename T> |
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30 | void reduce_max(const T * buffer, T* recvbuf, int count) |
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31 | { |
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32 | transform(buffer, buffer+count, recvbuf, recvbuf, max_op<T>); |
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33 | } |
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34 | |
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35 | template<typename T> |
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36 | void reduce_min(const T * buffer, T* recvbuf, int count) |
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37 | { |
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38 | transform(buffer, buffer+count, recvbuf, recvbuf, min_op<T>); |
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39 | } |
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40 | |
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41 | template<typename T> |
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42 | void reduce_sum(const T * buffer, T* recvbuf, int count) |
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43 | { |
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44 | transform(buffer, buffer+count, recvbuf, recvbuf, std::plus<T>()); |
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45 | } |
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46 | |
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47 | |
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48 | int MPI_Exscan_local(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) |
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49 | { |
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50 | valid_op(op); |
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51 | |
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52 | int ep_rank_loc = comm->ep_comm_ptr->size_rank_info[1].first; |
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53 | int num_ep = comm->ep_comm_ptr->size_rank_info[1].second; |
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54 | int mpi_rank = comm->ep_comm_ptr->size_rank_info[2].first; |
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55 | |
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56 | |
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57 | ::MPI_Aint datasize, lb; |
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58 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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59 | |
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60 | if(ep_rank_loc == 0 && mpi_rank != 0) |
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61 | { |
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62 | comm->my_buffer->void_buffer[0] = recvbuf; |
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63 | } |
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64 | if(ep_rank_loc == 0 && mpi_rank == 0) |
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65 | { |
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66 | comm->my_buffer->void_buffer[0] = const_cast<void*>(sendbuf); |
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67 | } |
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68 | |
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69 | |
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70 | MPI_Barrier_local(comm); |
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71 | |
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72 | memcpy(recvbuf, comm->my_buffer->void_buffer[0], datasize*count); |
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73 | |
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74 | MPI_Barrier_local(comm); |
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75 | |
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76 | comm->my_buffer->void_buffer[ep_rank_loc] = const_cast<void*>(sendbuf); |
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77 | |
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78 | MPI_Barrier_local(comm); |
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79 | |
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80 | if(op == MPI_SUM) |
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81 | { |
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82 | if(datatype == MPI_INT ) |
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83 | { |
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84 | assert(datasize == sizeof(int)); |
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85 | for(int i=0; i<ep_rank_loc; i++) |
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86 | reduce_sum<int>(static_cast<int*>(comm->my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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87 | } |
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88 | |
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89 | else if(datatype == MPI_FLOAT ) |
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90 | { |
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91 | assert(datasize == sizeof(float)); |
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92 | for(int i=0; i<ep_rank_loc; i++) |
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93 | reduce_sum<float>(static_cast<float*>(comm->my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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94 | } |
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95 | |
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96 | |
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97 | else if(datatype == MPI_DOUBLE ) |
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98 | { |
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99 | assert(datasize == sizeof(double)); |
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100 | for(int i=0; i<ep_rank_loc; i++) |
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101 | reduce_sum<double>(static_cast<double*>(comm->my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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102 | } |
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103 | |
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104 | else if(datatype == MPI_CHAR ) |
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105 | { |
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106 | assert(datasize == sizeof(char)); |
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107 | for(int i=0; i<ep_rank_loc; i++) |
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108 | reduce_sum<char>(static_cast<char*>(comm->my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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109 | } |
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110 | |
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111 | else if(datatype == MPI_LONG ) |
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112 | { |
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113 | assert(datasize == sizeof(long)); |
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114 | for(int i=0; i<ep_rank_loc; i++) |
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115 | reduce_sum<long>(static_cast<long*>(comm->my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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116 | } |
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117 | |
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118 | else if(datatype == MPI_UNSIGNED_LONG ) |
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119 | { |
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120 | assert(datasize == sizeof(unsigned long)); |
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121 | for(int i=0; i<ep_rank_loc; i++) |
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122 | reduce_sum<unsigned long>(static_cast<unsigned long*>(comm->my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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123 | } |
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124 | |
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125 | else if(datatype == MPI_LONG_LONG_INT ) |
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126 | { |
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127 | assert(datasize == sizeof(long long int)); |
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128 | for(int i=0; i<ep_rank_loc; i++) |
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129 | reduce_sum<long long int>(static_cast<long long int*>(comm->my_buffer->void_buffer[i]), static_cast<long long int*>(recvbuf), count); |
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130 | } |
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131 | |
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132 | else |
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133 | { |
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134 | printf("datatype Error in ep_exscan : INT, FLOAT, DOUBLE, CHAR, LONG, UNSIGNED_LONG, LONG_LONG_INT\n"); |
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135 | MPI_Abort(comm, 0); |
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136 | } |
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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_MAX) |
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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=0; i<ep_rank_loc; i++) |
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147 | reduce_max<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=0; i<ep_rank_loc; i++) |
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154 | reduce_max<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=0; i<ep_rank_loc; i++) |
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161 | reduce_max<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=0; i<ep_rank_loc; i++) |
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168 | reduce_max<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=0; i<ep_rank_loc; i++) |
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175 | reduce_max<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=0; i<ep_rank_loc; i++) |
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182 | reduce_max<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 int)); |
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188 | for(int i=0; i<ep_rank_loc; i++) |
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189 | reduce_max<long long int>(static_cast<long long int*>(comm->my_buffer->void_buffer[i]), static_cast<long long int*>(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_exscan : 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 | else if(op == MPI_MIN) |
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200 | { |
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201 | if(datatype == MPI_INT ) |
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202 | { |
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203 | assert(datasize == sizeof(int)); |
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204 | for(int i=0; i<ep_rank_loc; i++) |
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205 | reduce_min<int>(static_cast<int*>(comm->my_buffer->void_buffer[i]), static_cast<int*>(recvbuf), count); |
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206 | } |
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207 | |
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208 | else if(datatype == MPI_FLOAT ) |
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209 | { |
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210 | assert(datasize == sizeof(float)); |
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211 | for(int i=0; i<ep_rank_loc; i++) |
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212 | reduce_min<float>(static_cast<float*>(comm->my_buffer->void_buffer[i]), static_cast<float*>(recvbuf), count); |
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213 | } |
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214 | |
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215 | else if(datatype == MPI_DOUBLE ) |
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216 | { |
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217 | assert(datasize == sizeof(double)); |
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218 | for(int i=0; i<ep_rank_loc; i++) |
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219 | reduce_min<double>(static_cast<double*>(comm->my_buffer->void_buffer[i]), static_cast<double*>(recvbuf), count); |
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220 | } |
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221 | |
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222 | else if(datatype == MPI_CHAR ) |
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223 | { |
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224 | assert(datasize == sizeof(char)); |
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225 | for(int i=0; i<ep_rank_loc; i++) |
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226 | reduce_min<char>(static_cast<char*>(comm->my_buffer->void_buffer[i]), static_cast<char*>(recvbuf), count); |
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227 | } |
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228 | |
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229 | else if(datatype == MPI_LONG ) |
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230 | { |
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231 | assert(datasize == sizeof(long)); |
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232 | for(int i=0; i<ep_rank_loc; i++) |
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233 | reduce_min<long>(static_cast<long*>(comm->my_buffer->void_buffer[i]), static_cast<long*>(recvbuf), count); |
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234 | } |
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235 | |
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236 | else if(datatype == MPI_UNSIGNED_LONG ) |
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237 | { |
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238 | assert(datasize == sizeof(unsigned long)); |
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239 | for(int i=0; i<ep_rank_loc; i++) |
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240 | reduce_min<unsigned long>(static_cast<unsigned long*>(comm->my_buffer->void_buffer[i]), static_cast<unsigned long*>(recvbuf), count); |
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241 | } |
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242 | |
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243 | else if(datatype == MPI_LONG_LONG_INT ) |
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244 | { |
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245 | assert(datasize == sizeof(long long int)); |
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246 | for(int i=0; i<ep_rank_loc; i++) |
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247 | reduce_min<long long int>(static_cast<long long int*>(comm->my_buffer->void_buffer[i]), static_cast<long long int*>(recvbuf), count); |
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248 | } |
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249 | |
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250 | else |
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251 | { |
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252 | printf("datatype Error in ep_exscan : INT, FLOAT, DOUBLE, CHAR, LONG, UNSIGNED_LONG, LONG_LONG_INT\n"); |
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253 | MPI_Abort(comm, 0); |
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254 | } |
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255 | } |
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256 | |
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257 | else |
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258 | { |
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259 | printf("op type Error in ep_exscan : MPI_MAX, MPI_MIN, MPI_SUM\n"); |
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260 | MPI_Abort(comm, 0); |
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261 | } |
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262 | |
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263 | MPI_Barrier_local(comm); |
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264 | |
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265 | } |
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266 | |
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267 | int MPI_Exscan(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) |
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268 | { |
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269 | if(!comm->is_ep) return ::MPI_Exscan(sendbuf, recvbuf, count, to_mpi_type(datatype), to_mpi_op(op), to_mpi_comm(comm->mpi_comm)); |
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270 | if(comm->is_intercomm) return MPI_Exscan_intercomm(sendbuf, recvbuf, count, datatype, op, comm); |
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271 | |
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272 | assert(valid_type(datatype)); |
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273 | assert(valid_op(op)); |
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274 | |
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275 | int ep_rank = comm->ep_comm_ptr->size_rank_info[0].first; |
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276 | int ep_rank_loc = comm->ep_comm_ptr->size_rank_info[1].first; |
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277 | int mpi_rank = comm->ep_comm_ptr->size_rank_info[2].first; |
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278 | int ep_size = comm->ep_comm_ptr->size_rank_info[0].second; |
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279 | int num_ep = comm->ep_comm_ptr->size_rank_info[1].second; |
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280 | int mpi_size = comm->ep_comm_ptr->size_rank_info[2].second; |
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281 | |
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282 | ::MPI_Aint datasize, lb; |
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283 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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284 | |
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285 | void* tmp_sendbuf; |
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286 | tmp_sendbuf = new void*[datasize * count]; |
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287 | |
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288 | int my_src = 0; |
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289 | int my_dst = ep_rank; |
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290 | |
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291 | std::vector<int> my_map(mpi_size, 0); |
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292 | |
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293 | for(int i=0; i<comm->ep_rank_map->size(); i++) my_map[comm->ep_rank_map->at(i).second]++; |
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294 | |
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295 | for(int i=0; i<mpi_rank; i++) my_src += my_map[i]; |
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296 | my_src += ep_rank_loc; |
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297 | |
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298 | |
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299 | for(int i=0; i<mpi_size; i++) |
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300 | { |
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301 | if(my_dst < my_map[i]) |
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302 | { |
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303 | my_dst = get_ep_rank(comm, my_dst, i); |
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304 | break; |
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305 | } |
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306 | else |
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307 | my_dst -= my_map[i]; |
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308 | } |
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309 | |
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310 | if(ep_rank != my_dst) |
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311 | { |
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312 | MPI_Request request[2]; |
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313 | MPI_Status status[2]; |
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314 | |
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315 | MPI_Isend(sendbuf, count, datatype, my_dst, my_dst, comm, &request[0]); |
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316 | |
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317 | MPI_Irecv(tmp_sendbuf, count, datatype, my_src, ep_rank, comm, &request[1]); |
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318 | |
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319 | MPI_Waitall(2, request, status); |
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320 | } |
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321 | |
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322 | else memcpy(tmp_sendbuf, sendbuf, datasize*count); |
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323 | |
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324 | |
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325 | void* tmp_recvbuf; |
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326 | tmp_recvbuf = new void*[datasize * count]; |
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327 | |
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328 | MPI_Reduce_local(tmp_sendbuf, tmp_recvbuf, count, datatype, op, 0, comm); |
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329 | |
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330 | if(ep_rank_loc == 0) |
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331 | { |
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332 | ::MPI_Exscan(MPI_IN_PLACE, tmp_recvbuf, count, to_mpi_type(datatype), to_mpi_op(op), to_mpi_comm(comm->mpi_comm)); |
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333 | } |
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334 | |
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335 | MPI_Exscan_local(tmp_sendbuf, tmp_recvbuf, count, datatype, op, comm); |
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336 | |
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337 | |
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338 | if(ep_rank != my_src) |
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339 | { |
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340 | MPI_Request request[2]; |
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341 | MPI_Status status[2]; |
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342 | |
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343 | MPI_Isend(tmp_recvbuf, count, datatype, my_src, my_src, comm, &request[0]); |
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344 | |
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345 | MPI_Irecv(recvbuf, count, datatype, my_dst, ep_rank, comm, &request[1]); |
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346 | |
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347 | MPI_Waitall(2, request, status); |
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348 | } |
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349 | |
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350 | else memcpy(recvbuf, tmp_recvbuf, datasize*count); |
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351 | |
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352 | delete[] tmp_sendbuf; |
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353 | delete[] tmp_recvbuf; |
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354 | |
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355 | } |
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356 | |
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357 | |
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358 | int MPI_Exscan_intercomm(const void *sendbuf, void *recvbuf, int count, MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) |
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359 | { |
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360 | printf("MPI_Exscan_intercomm not yet implemented\n"); |
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361 | MPI_Abort(comm, 0); |
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362 | } |
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363 | |
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364 | } |
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