[1381] | 1 | /*! |
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| 2 | \file ep_create.cpp |
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| 3 | \since 2 may 2016 |
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| 4 | |
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| 5 | \brief Definitions of MPI endpoint function: MPI_Comm_create_endpoints |
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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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[1499] | 16 | |
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| 17 | /*! |
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| 18 | Dynamic creation of endpoints for each MPI process. |
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| 19 | The output of this function is an array of communicator handles of length num_ep, where each handle |
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| 20 | corresponds to a nez local randk in the output communicator. |
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| 21 | Once created, endpoints behave as MPI processes. |
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| 22 | \param [in] mpi_comm Parent MPI communicator. |
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| 23 | \param [in] num_ep Number of endpoints per process. |
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| 24 | \param [out] info Information of the EP creation. |
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| 25 | \param [out] out_comm_hdls Handles of EP communicators. |
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| 26 | */ |
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[1381] | 27 | |
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| 28 | int MPI_Comm_create_endpoints(void* base_comm_ptr, int num_ep, MPI_Info info, MPI_Comm *& out_comm_hdls) |
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| 29 | { |
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| 30 | |
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| 31 | int base_rank; |
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| 32 | int base_size; |
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| 33 | |
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| 34 | ::MPI_Comm mpi_base_comm = to_mpi_comm(base_comm_ptr); |
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| 35 | |
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| 36 | ::MPI_Comm_size(mpi_base_comm, &base_size); // ep_lib::mpi_comm_size |
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| 37 | ::MPI_Comm_rank(mpi_base_comm, &base_rank); // ep_lib::mpi_comm_rank |
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| 38 | // parent_comm can also be endpoints communicators |
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[1499] | 39 | |
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[1381] | 40 | std::vector<int> recv_num_ep(base_size); |
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| 41 | |
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| 42 | out_comm_hdls = new MPI_Comm[num_ep]; |
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| 43 | |
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| 44 | for (int idx = 0; idx < num_ep; ++idx) |
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| 45 | { |
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[1500] | 46 | out_comm_hdls[idx] = new ep_comm; |
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| 47 | out_comm_hdls[idx]->is_ep = true; |
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| 48 | out_comm_hdls[idx]->is_intercomm = false; |
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| 49 | out_comm_hdls[idx]->ep_comm_ptr = new ep_communicator; |
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| 50 | *(static_cast< ::MPI_Comm*>(out_comm_hdls[idx]->mpi_comm)) = *(static_cast< ::MPI_Comm*>(base_comm_ptr)); |
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| 51 | out_comm_hdls[idx]->ep_comm_ptr->comm_list = out_comm_hdls; |
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| 52 | out_comm_hdls[idx]->ep_comm_ptr->comm_label = 0; |
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[1381] | 53 | } |
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| 54 | |
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| 55 | ::MPI_Allgather(&num_ep, 1, to_mpi_type(MPI_INT), &recv_num_ep[0], 1, to_mpi_type(MPI_INT), mpi_base_comm); |
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| 56 | |
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| 57 | |
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| 58 | int sum = 0; // representing total ep number of process with smaller rank |
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| 59 | for (int i = 0; i < base_rank; ++i) {sum += recv_num_ep[i]; } |
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| 60 | |
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| 61 | int ep_size = std::accumulate(recv_num_ep.begin(), recv_num_ep.end(), 0); |
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| 62 | |
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[1500] | 63 | out_comm_hdls[0]->ep_barrier = new ep_barrier(num_ep); |
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| 64 | out_comm_hdls[0]->my_buffer = new BUFFER; |
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[1381] | 65 | |
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[1503] | 66 | out_comm_hdls[0]->ep_rank_map = new EP_RANK_MAP; |
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[1381] | 67 | |
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[1503] | 68 | |
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[1381] | 69 | for (int i = 1; i < num_ep; i++) |
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| 70 | { |
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[1500] | 71 | out_comm_hdls[i]->ep_barrier = out_comm_hdls[0]->ep_barrier; |
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| 72 | out_comm_hdls[i]->my_buffer = out_comm_hdls[0]->my_buffer; |
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[1503] | 73 | out_comm_hdls[i]->ep_rank_map= out_comm_hdls[0]->ep_rank_map; |
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[1381] | 74 | } |
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| 75 | |
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| 76 | |
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| 77 | for (int i = 0; i < num_ep; i++) |
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| 78 | { |
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[1500] | 79 | out_comm_hdls[i]->ep_comm_ptr->size_rank_info[0] = std::make_pair(sum+i, ep_size); |
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| 80 | out_comm_hdls[i]->ep_comm_ptr->size_rank_info[1] = std::make_pair(i, num_ep); |
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| 81 | out_comm_hdls[i]->ep_comm_ptr->size_rank_info[2] = std::make_pair(base_rank, base_size); |
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[1381] | 82 | |
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[1500] | 83 | out_comm_hdls[i]->ep_comm_ptr->message_queue = new Message_list; |
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[1381] | 84 | } |
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| 85 | |
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| 86 | |
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| 87 | int ind = 0; |
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| 88 | |
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| 89 | for(int i=0; i<base_size; i++) |
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| 90 | { |
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| 91 | for(int j=0; j<recv_num_ep[i]; j++) |
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| 92 | { |
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[1503] | 93 | //out_comm_hdls[0]->rank_map->at(ind) = make_pair(j, i); |
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| 94 | out_comm_hdls[0]->ep_rank_map->insert(std::pair< int, std::pair<int,int> >(ind, j, i)); |
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[1381] | 95 | ind++; |
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| 96 | } |
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| 97 | } |
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| 98 | |
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| 99 | return 0; |
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| 100 | |
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| 101 | } //MPI_Comm_create_endpoints |
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| 102 | |
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| 103 | |
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| 104 | } //namespace ep_lib |
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