[1134] | 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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