1 | /*! |
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2 | \file ep_bcast.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_Bcast |
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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 | |
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12 | using namespace std; |
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13 | |
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14 | |
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15 | namespace ep_lib |
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16 | { |
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17 | int MPI_Bcast_local(void *buffer, int count, MPI_Datatype datatype, MPI_Comm comm) |
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18 | { |
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19 | if(datatype == MPI_INT) |
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20 | { |
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21 | return MPI_Bcast_local_int(buffer, count, comm); |
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22 | } |
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23 | else if(datatype == MPI_FLOAT) |
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24 | { |
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25 | return MPI_Bcast_local_float(buffer, count, comm); |
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26 | } |
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27 | else if(datatype == MPI_DOUBLE) |
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28 | { |
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29 | return MPI_Bcast_local_double(buffer, count, comm); |
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30 | } |
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31 | else if(datatype == MPI_CHAR) |
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32 | { |
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33 | return MPI_Bcast_local_char(buffer, count, comm); |
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34 | } |
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35 | else if(datatype == MPI_LONG) |
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36 | { |
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37 | return MPI_Bcast_local_long(buffer, count, comm); |
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38 | } |
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39 | else if(datatype == MPI_UNSIGNED_LONG) |
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40 | { |
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41 | return MPI_Bcast_local_char(buffer, count, comm); |
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42 | } |
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43 | else |
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44 | { |
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45 | printf("MPI_Bcast Datatype not supported!\n"); |
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46 | exit(0); |
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47 | } |
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48 | } |
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49 | |
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50 | int MPI_Bcast_local_int(void *buf, int count, MPI_Comm comm) |
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51 | { |
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52 | int my_rank = 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 | |
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55 | int *buffer = comm.my_buffer->buf_int; |
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56 | int *tmp = static_cast<int*>(buf); |
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57 | |
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58 | for(int j=0; j<count; j+=BUFFER_SIZE) |
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59 | { |
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60 | if(my_rank == 0) |
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61 | { |
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62 | #pragma omp critical (write_to_buffer) |
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63 | { |
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64 | copy(tmp+j, tmp+j+min(BUFFER_SIZE, count-j), buffer); |
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65 | } |
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66 | #pragma omp flush |
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67 | } |
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68 | |
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69 | MPI_Barrier_local(comm); |
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70 | |
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71 | |
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72 | |
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73 | if(my_rank != 0) |
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74 | { |
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75 | #pragma omp flush |
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76 | #pragma omp critical (read_from_buffer) |
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77 | { |
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78 | copy(buffer, buffer+min(BUFFER_SIZE, count-j), tmp+j); |
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79 | } |
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80 | } |
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81 | |
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82 | MPI_Barrier_local(comm); |
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83 | } |
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84 | } |
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85 | |
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86 | int MPI_Bcast_local_float(void *buf, int count, MPI_Comm comm) |
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87 | { |
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88 | int my_rank = comm.ep_comm_ptr->size_rank_info[1].first; |
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89 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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90 | |
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91 | float *buffer = comm.my_buffer->buf_float; |
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92 | float *tmp = static_cast<float*>(buf); |
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93 | |
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94 | for(int j=0; j<count; j+=BUFFER_SIZE) |
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95 | { |
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96 | if(my_rank == 0) |
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97 | { |
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98 | #pragma omp critical (write_to_buffer) |
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99 | { |
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100 | copy(tmp+j, tmp+j+min(BUFFER_SIZE, count-j), buffer); |
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101 | } |
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102 | #pragma omp flush |
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103 | } |
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104 | |
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105 | MPI_Barrier_local(comm); |
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106 | |
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107 | |
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108 | if(my_rank != 0) |
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109 | { |
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110 | #pragma omp flush |
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111 | #pragma omp critical (read_from_buffer) |
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112 | { |
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113 | copy(buffer, buffer+min(BUFFER_SIZE, count-j), tmp+j); |
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114 | } |
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115 | } |
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116 | |
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117 | MPI_Barrier_local(comm); |
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118 | } |
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119 | } |
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120 | |
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121 | int MPI_Bcast_local_double(void *buf, int count, MPI_Comm comm) |
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122 | { |
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123 | int my_rank = comm.ep_comm_ptr->size_rank_info[1].first; |
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124 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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125 | |
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126 | double *buffer = comm.my_buffer->buf_double; |
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127 | double *tmp = static_cast<double*>(buf); |
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128 | |
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129 | for(int j=0; j<count; j+=BUFFER_SIZE) |
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130 | { |
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131 | if(my_rank == 0) |
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132 | { |
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133 | #pragma omp critical (write_to_buffer) |
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134 | { |
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135 | copy(tmp+j, tmp+j+min(BUFFER_SIZE, count-j), buffer); |
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136 | } |
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137 | #pragma omp flush |
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138 | } |
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139 | |
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140 | MPI_Barrier_local(comm); |
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141 | |
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142 | |
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143 | if(my_rank != 0) |
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144 | { |
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145 | #pragma omp flush |
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146 | #pragma omp critical (read_from_buffer) |
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147 | { |
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148 | copy(buffer, buffer+min(BUFFER_SIZE, count-j), tmp+j); |
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149 | } |
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150 | } |
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151 | |
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152 | MPI_Barrier_local(comm); |
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153 | } |
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154 | } |
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155 | |
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156 | |
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157 | int MPI_Bcast_local_char(void *buf, int count, MPI_Comm comm) |
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158 | { |
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159 | int my_rank = comm.ep_comm_ptr->size_rank_info[1].first; |
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160 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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161 | |
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162 | char *buffer = comm.my_buffer->buf_char; |
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163 | char *tmp = static_cast<char*>(buf); |
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164 | |
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165 | for(int j=0; j<count; j+=BUFFER_SIZE) |
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166 | { |
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167 | if(my_rank == 0) |
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168 | { |
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169 | #pragma omp critical (write_to_buffer) |
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170 | { |
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171 | copy(tmp+j, tmp+j+min(BUFFER_SIZE, count-j), buffer); |
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172 | } |
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173 | #pragma omp flush |
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174 | } |
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175 | |
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176 | MPI_Barrier_local(comm); |
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177 | |
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178 | |
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179 | if(my_rank != 0) |
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180 | { |
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181 | #pragma omp flush |
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182 | #pragma omp critical (read_from_buffer) |
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183 | { |
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184 | copy(buffer, buffer+min(BUFFER_SIZE, count-j), tmp+j); |
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185 | } |
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186 | } |
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187 | |
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188 | MPI_Barrier_local(comm); |
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189 | } |
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190 | } |
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191 | |
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192 | int MPI_Bcast_local_long(void *buf, int count, MPI_Comm comm) |
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193 | { |
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194 | int my_rank = comm.ep_comm_ptr->size_rank_info[1].first; |
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195 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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196 | |
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197 | long *buffer = comm.my_buffer->buf_long; |
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198 | long *tmp = static_cast<long*>(buf); |
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199 | |
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200 | for(int j=0; j<count; j+=BUFFER_SIZE) |
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201 | { |
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202 | if(my_rank == 0) |
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203 | { |
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204 | #pragma omp critical (write_to_buffer) |
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205 | { |
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206 | copy(tmp+j, tmp+j+min(BUFFER_SIZE, count-j), buffer); |
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207 | } |
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208 | #pragma omp flush |
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209 | } |
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210 | |
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211 | MPI_Barrier_local(comm); |
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212 | |
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213 | |
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214 | if(my_rank != 0) |
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215 | { |
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216 | #pragma omp flush |
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217 | #pragma omp critical (read_from_buffer) |
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218 | { |
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219 | copy(buffer, buffer+min(BUFFER_SIZE, count-j), tmp+j); |
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220 | } |
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221 | } |
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222 | |
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223 | MPI_Barrier_local(comm); |
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224 | } |
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225 | } |
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226 | |
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227 | int MPI_Bcast_local_ulong(void *buf, int count, MPI_Comm comm) |
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228 | { |
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229 | int my_rank = comm.ep_comm_ptr->size_rank_info[1].first; |
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230 | int num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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231 | |
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232 | unsigned long *buffer = comm.my_buffer->buf_ulong; |
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233 | unsigned long *tmp = static_cast<unsigned long*>(buf); |
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234 | |
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235 | for(int j=0; j<count; j+=BUFFER_SIZE) |
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236 | { |
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237 | if(my_rank == 0) |
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238 | { |
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239 | #pragma omp critical (write_to_buffer) |
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240 | { |
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241 | copy(tmp+j, tmp+j+min(BUFFER_SIZE, count-j), buffer); |
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242 | } |
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243 | #pragma omp flush |
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244 | } |
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245 | |
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246 | MPI_Barrier_local(comm); |
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247 | |
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248 | |
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249 | if(my_rank != 0) |
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250 | { |
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251 | #pragma omp flush |
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252 | #pragma omp critical (read_from_buffer) |
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253 | { |
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254 | copy(buffer, buffer+min(BUFFER_SIZE, count-j), tmp+j); |
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255 | } |
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256 | } |
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257 | |
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258 | MPI_Barrier_local(comm); |
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259 | } |
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260 | } |
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261 | |
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262 | |
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263 | int MPI_Bcast(void *buffer, int count, MPI_Datatype datatype, int root, MPI_Comm comm) |
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264 | { |
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265 | |
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266 | if(!comm.is_ep) |
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267 | { |
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268 | ::MPI_Bcast(buffer, count, static_cast< ::MPI_Datatype>(datatype), root, static_cast< ::MPI_Comm>(comm.mpi_comm)); |
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269 | return 0; |
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270 | } |
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271 | |
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272 | |
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273 | int ep_rank, ep_rank_loc, mpi_rank; |
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274 | int ep_size, num_ep, mpi_size; |
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275 | |
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276 | ep_rank = comm.ep_comm_ptr->size_rank_info[0].first; |
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277 | ep_rank_loc = comm.ep_comm_ptr->size_rank_info[1].first; |
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278 | mpi_rank = comm.ep_comm_ptr->size_rank_info[2].first; |
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279 | ep_size = comm.ep_comm_ptr->size_rank_info[0].second; |
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280 | num_ep = comm.ep_comm_ptr->size_rank_info[1].second; |
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281 | mpi_size = comm.ep_comm_ptr->size_rank_info[2].second; |
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282 | |
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283 | |
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284 | |
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285 | int root_mpi_rank = comm.rank_map->at(root).second; |
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286 | int root_ep_rank_loc = comm.rank_map->at(root).first; |
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287 | |
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288 | |
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289 | // if root is not master thread, send first to master |
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290 | if(root_ep_rank_loc != 0 && mpi_rank == root_mpi_rank) |
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291 | { |
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292 | innode_memcpy(root_ep_rank_loc, buffer, 0, buffer, count, datatype, comm); |
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293 | } |
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294 | |
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295 | |
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296 | if(ep_rank_loc==0) |
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297 | { |
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298 | ::MPI_Bcast(buffer, count, static_cast< ::MPI_Datatype>(datatype), root_mpi_rank, static_cast< ::MPI_Comm>(comm.mpi_comm)); |
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299 | } |
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300 | |
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301 | MPI_Bcast_local(buffer, count, datatype, comm); |
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302 | |
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303 | return 0; |
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304 | } |
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305 | |
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306 | |
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307 | } |
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