1 | /*! |
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2 | \file ep_wait.cpp |
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3 | \since 2 may 2016 |
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4 | |
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5 | \brief Definitions of MPI wait function: MPI_Wait, MPI_Waitall, MPI_Waitsome, MPI_Waitany |
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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 | |
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16 | namespace ep_lib |
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17 | { |
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18 | |
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19 | int MPI_Wait(MPI_Request *request, MPI_Status *status) |
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20 | { |
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21 | |
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22 | if(request->type == 1) |
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23 | { |
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24 | ::MPI_Request mpi_request = static_cast< ::MPI_Request >(request->mpi_request); |
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25 | ::MPI_Status mpi_status; |
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26 | ::MPI_Errhandler_set(MPI_COMM_WORLD_STD, MPI_ERRORS_RETURN); |
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27 | int error_code = ::MPI_Wait(&mpi_request, &mpi_status); |
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28 | if (error_code != MPI_SUCCESS) { |
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29 | |
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30 | char error_string[BUFSIZ]; |
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31 | int length_of_error_string, error_class; |
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32 | |
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33 | ::MPI_Error_class(error_code, &error_class); |
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34 | ::MPI_Error_string(error_class, error_string, &length_of_error_string); |
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35 | printf("%s\n", error_string); |
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36 | } |
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37 | |
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38 | status->mpi_status = &mpi_status; |
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39 | status->ep_src = request->ep_src; |
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40 | status->ep_tag = request->ep_tag; |
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41 | status->ep_datatype = request->ep_datatype; |
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42 | |
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43 | return 0; |
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44 | } |
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45 | |
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46 | if(request->type == 2) |
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47 | { |
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48 | int flag = false; |
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49 | MPI_Message message; |
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50 | |
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51 | while(!flag) |
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52 | { |
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53 | Message_Check(request->comm); |
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54 | #pragma omp flush |
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55 | MPI_Improbe(request->ep_src, request->ep_tag, request->comm, &flag, &message, status); |
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56 | } |
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57 | |
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58 | int count; |
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59 | request->type = 3; |
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60 | MPI_Get_count(status, request->ep_datatype, &count); |
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61 | MPI_Mrecv(request->buf, count, request->ep_datatype, &message, status); |
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62 | status->ep_datatype = request->ep_datatype; |
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63 | |
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64 | //check_sum_recv(request->buf, count, request->ep_datatype, request->ep_src, request->ep_tag, request->comm, 2); |
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65 | |
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66 | return 0; |
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67 | } |
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68 | |
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69 | if(request->type == 3) |
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70 | { |
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71 | ::MPI_Request mpi_request = static_cast< ::MPI_Request >(request->mpi_request); |
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72 | ::MPI_Status mpi_status; |
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73 | ::MPI_Errhandler_set(MPI_COMM_WORLD_STD, MPI_ERRORS_RETURN); |
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74 | int error_code = ::MPI_Wait(&mpi_request, &mpi_status); |
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75 | if (error_code != MPI_SUCCESS) { |
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76 | |
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77 | char error_string[BUFSIZ]; |
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78 | int length_of_error_string, error_class; |
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79 | |
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80 | ::MPI_Error_class(error_code, &error_class); |
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81 | ::MPI_Error_string(error_class, error_string, &length_of_error_string); |
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82 | printf("%s\n", error_string); |
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83 | } |
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84 | |
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85 | |
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86 | status->mpi_status = new ::MPI_Status(mpi_status); |
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87 | status->ep_src = request->ep_src; |
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88 | status->ep_tag = request->ep_tag; |
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89 | status->ep_datatype = request->ep_datatype; |
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90 | |
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91 | //check_sum_recv(request->buf, count, request->ep_datatype, request->ep_src, request->ep_tag, request->comm, 2); |
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92 | } |
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93 | |
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94 | return MPI_SUCCESS; |
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95 | |
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96 | } /*end of mpi_wait*/ |
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97 | |
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98 | |
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99 | |
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100 | |
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101 | |
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102 | |
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103 | int MPI_Waitall(int count, MPI_Request *array_of_requests, MPI_Status *array_of_statuses) |
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104 | { |
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105 | //int dest_rank; |
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106 | //MPI_Comm_rank(MPI_COMM_WORLD, &dest_rank); |
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107 | //printf("proc %d enters waitall\n", dest_rank); |
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108 | |
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109 | int finished = 0; |
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110 | int finished_index[count]; |
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111 | |
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112 | for(int i=0; i<count; i++) |
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113 | { |
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114 | finished_index[i] = false; |
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115 | } |
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116 | |
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117 | while(finished < count) |
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118 | { |
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119 | |
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120 | for(int i=0; i<count; i++) |
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121 | { |
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122 | if(finished_index[i] == false) // this request has not been tested. |
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123 | { |
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124 | if(array_of_requests[i].type != 2) // isend or imrecv |
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125 | { |
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126 | //MPI_Wait(&array_of_requests[i], &array_of_statuses[i]); |
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127 | int tested; |
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128 | MPI_Test(&array_of_requests[i], &tested, &array_of_statuses[i]); |
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129 | if(!tested) MPI_Wait(&array_of_requests[i], &array_of_statuses[i]); |
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130 | finished++; |
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131 | finished_index[i] = true; |
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132 | } |
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133 | else // irecv |
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134 | { |
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135 | // parcours pending list |
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136 | // find request in waitall |
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137 | Message_Check(array_of_requests[i].comm); |
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138 | // improbe + mrecv |
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139 | // erase element in pending list |
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140 | // finished++; |
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141 | // finished_index[i] = true; |
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142 | |
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143 | |
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144 | int flag = false; |
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145 | MPI_Message message; |
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146 | |
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147 | MPI_Improbe(array_of_requests[i].ep_src, array_of_requests[i].ep_tag, array_of_requests[i].comm, &flag, &message, &array_of_statuses[i]); |
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148 | |
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149 | if(flag) |
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150 | { |
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151 | int recv_count; |
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152 | MPI_Get_count(&array_of_statuses[i], array_of_requests[i].ep_datatype, &recv_count); |
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153 | MPI_Mrecv(array_of_requests[i].buf, recv_count, array_of_requests[i].ep_datatype, &message, &array_of_statuses[i]); |
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154 | //check_sum_recv(array_of_requests[i].buf, recv_count, array_of_requests[i].ep_datatype, array_of_requests[i].ep_src, array_of_requests[i].ep_tag, array_of_requests[i].comm, 2); |
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155 | |
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156 | finished++; |
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157 | finished_index[i] = true; |
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158 | } |
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159 | } |
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160 | } |
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161 | } |
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162 | } |
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163 | //printf("proc %d exits waitall\n", dest_rank); |
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164 | return MPI_SUCCESS; |
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165 | } /* end of mpi_waitall*/ |
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166 | |
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167 | |
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168 | } |
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