| 1 | #ifdef _usingEP |
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| 2 | /*! |
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| 3 | \file ep_gather.cpp |
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| 4 | \since 2 may 2016 |
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| 5 | |
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| 6 | \brief Definitions of MPI collective function: MPI_Gatherv, MPI_Allgatherv |
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| 7 | */ |
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| 8 | |
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| 9 | #include "ep_lib.hpp" |
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| 10 | #include <mpi.h> |
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| 11 | #include "ep_declaration.hpp" |
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| 12 | #include "ep_mpi.hpp" |
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| 13 | |
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| 14 | using namespace std; |
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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_Gatherv_local(const void *sendbuf, int count, MPI_Datatype datatype, void *recvbuf, const int recvcounts[], const int displs[], int local_root, MPI_Comm comm) |
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| 20 | { |
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| 21 | assert(valid_type(datatype)); |
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| 22 | |
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| 23 | ::MPI_Aint datasize, lb; |
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| 24 | ::MPI_Type_get_extent(to_mpi_type(datatype), &lb, &datasize); |
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| 25 | |
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| 26 | int ep_rank_loc = comm->ep_comm_ptr->size_rank_info[1].first; |
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| 27 | int num_ep = comm->ep_comm_ptr->size_rank_info[1].second; |
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| 28 | |
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| 29 | |
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| 30 | #pragma omp critical (_gatherv) |
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| 31 | comm->my_buffer->void_buffer[ep_rank_loc] = const_cast< void* >(sendbuf); |
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| 32 | |
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| 33 | MPI_Barrier_local(comm); |
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| 34 | |
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| 35 | if(ep_rank_loc == local_root) |
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| 36 | { |
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| 37 | for(int i=0; i<num_ep; i++) |
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| 38 | memcpy(recvbuf + datasize*displs[i], comm->my_buffer->void_buffer[i], datasize*recvcounts[i]); |
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| 39 | |
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| 40 | } |
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| 41 | |
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| 42 | MPI_Barrier_local(comm); |
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| 43 | } |
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| 44 | |
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| 45 | int MPI_Gatherv(const void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, const int input_recvcounts[], const int input_displs[], |
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| 46 | MPI_Datatype recvtype, int root, MPI_Comm comm) |
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| 47 | { |
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| 48 | |
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| 49 | if(!comm->is_ep) return ::MPI_Gatherv(const_cast<void*>(sendbuf), sendcount, to_mpi_type(sendtype), recvbuf, const_cast<int*>(input_recvcounts), const_cast<int*>(input_displs), |
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| 50 | to_mpi_type(recvtype), root, to_mpi_comm(comm->mpi_comm)); |
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| 51 | if(comm->is_intercomm) return MPI_Gatherv_intercomm(sendbuf, sendcount, sendtype, recvbuf, input_recvcounts, input_displs, recvtype, root, comm); |
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| 52 | |
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| 53 | assert(sendtype == recvtype); |
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| 54 | |
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| 55 | |
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| 56 | int ep_rank = comm->ep_comm_ptr->size_rank_info[0].first; |
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| 57 | int ep_rank_loc = comm->ep_comm_ptr->size_rank_info[1].first; |
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| 58 | int mpi_rank = comm->ep_comm_ptr->size_rank_info[2].first; |
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| 59 | int ep_size = comm->ep_comm_ptr->size_rank_info[0].second; |
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| 60 | int num_ep = comm->ep_comm_ptr->size_rank_info[1].second; |
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| 61 | int mpi_size = comm->ep_comm_ptr->size_rank_info[2].second; |
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| 62 | |
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| 63 | int root_mpi_rank = comm->ep_rank_map->at(root).second; |
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| 64 | int root_ep_loc = comm->ep_rank_map->at(root).first; |
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| 65 | |
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| 66 | ::MPI_Aint datasize, lb; |
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| 67 | ::MPI_Type_get_extent(to_mpi_type(sendtype), &lb, &datasize); |
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| 68 | |
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| 69 | int *recvcounts; |
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| 70 | int* displs; |
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| 71 | |
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| 72 | recvcounts = new int[ep_size]; |
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| 73 | displs = new int[ep_size]; |
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| 74 | |
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| 75 | |
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| 76 | bool is_master = (ep_rank_loc==0 && mpi_rank != root_mpi_rank ) || ep_rank == root; |
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| 77 | bool is_root = ep_rank == root; |
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| 78 | |
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| 79 | void* local_recvbuf; |
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| 80 | std::vector<int>local_recvcounts(num_ep, 0); |
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| 81 | std::vector<int>local_displs(num_ep, 0); |
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| 82 | |
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| 83 | |
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| 84 | if(is_root) |
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| 85 | { |
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| 86 | copy(input_recvcounts, input_recvcounts+ep_size, recvcounts); |
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| 87 | copy(input_displs, input_displs+ep_size, displs); |
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| 88 | } |
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| 89 | |
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| 90 | MPI_Bcast(recvcounts, ep_size, MPI_INT, root, comm); |
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| 91 | MPI_Bcast(displs, ep_size, MPI_INT, root, comm); |
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| 92 | |
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| 93 | if(mpi_rank == root_mpi_rank) MPI_Gather_local(&sendcount, 1, MPI_INT, local_recvcounts.data(), root_ep_loc, comm); |
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| 94 | else MPI_Gather_local(&sendcount, 1, MPI_INT, local_recvcounts.data(), 0, comm); |
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| 95 | |
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| 96 | |
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| 97 | //if(is_root) printf("rank %d =================local_recvcounts = %d %d\n", ep_rank, local_recvcounts[0], local_recvcounts[1]); |
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| 98 | //if(!is_root && ep_rank_loc==0 && mpi_rank != root_mpi_rank) printf("rank %d =================local_recvcounts = %d %d\n", ep_rank, local_recvcounts[0], local_recvcounts[1]); |
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| 99 | |
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| 100 | if(is_master) |
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| 101 | { |
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| 102 | int local_recvbuf_size = std::accumulate(local_recvcounts.begin(), local_recvcounts.end(), 0); |
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| 103 | |
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| 104 | for(int i=1; i<num_ep; i++) |
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| 105 | local_displs[i] = local_displs[i-1] + local_recvcounts[i-1]; |
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| 106 | |
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| 107 | local_recvbuf = new void*[datasize * local_recvbuf_size]; |
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| 108 | } |
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| 109 | |
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| 110 | if(mpi_rank == root_mpi_rank) MPI_Gatherv_local(sendbuf, sendcount, sendtype, local_recvbuf, local_recvcounts.data(), local_displs.data(), root_ep_loc, comm); |
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| 111 | else MPI_Gatherv_local(sendbuf, sendcount, sendtype, local_recvbuf, local_recvcounts.data(), local_displs.data(), 0, comm); |
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| 112 | |
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| 113 | |
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| 114 | //if(is_root) printf("rank %d =================local_recvbuf = %d %d\n", ep_rank, static_cast<int*>(local_recvbuf)[0], static_cast<int*>(local_recvbuf)[1]); |
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| 115 | //if(!is_root && ep_rank_loc==0 && mpi_rank != root_mpi_rank && ep_rank!=6) printf("rank %d =================local_recvbuf = %d %d\n", ep_rank, static_cast<int*>(local_recvbuf)[0], static_cast<int*>(local_recvbuf)[1]); |
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| 116 | //if(!is_root && ep_rank_loc==0 && mpi_rank != root_mpi_rank && ep_rank==6) printf("rank %d =================local_recvbuf = %d %d %d\n", ep_rank, static_cast<int*>(local_recvbuf)[0], static_cast<int*>(local_recvbuf)[1], static_cast<int*>(local_recvbuf)[2]); |
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| 117 | |
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| 118 | void* tmp_recvbuf; |
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| 119 | int tmp_recvbuf_size = std::accumulate(recvcounts, recvcounts+ep_size, 0); |
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| 120 | |
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| 121 | |
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| 122 | |
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| 123 | if(is_root) tmp_recvbuf = new void*[datasize * tmp_recvbuf_size]; |
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| 124 | |
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| 125 | |
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| 126 | std::vector<int> mpi_recvcounts(mpi_size, 0); |
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| 127 | std::vector<int> mpi_displs(mpi_size, 0); |
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| 128 | |
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| 129 | |
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| 130 | if(is_master) |
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| 131 | { |
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| 132 | int sendcount_mpi = 0; |
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| 133 | for(int i=0; i<num_ep; i++) |
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| 134 | { |
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| 135 | sendcount_mpi += local_recvcounts[i]; |
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| 136 | } |
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| 137 | |
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| 138 | for(int i=0; i<ep_size; i++) |
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| 139 | { |
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| 140 | mpi_recvcounts[comm->ep_rank_map->at(i).second]+=recvcounts[i]; |
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| 141 | } |
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| 142 | |
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| 143 | for(int i=1; i<mpi_size; i++) |
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| 144 | mpi_displs[i] = mpi_displs[i-1] + mpi_recvcounts[i-1]; |
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| 145 | |
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| 146 | |
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| 147 | ::MPI_Gatherv(local_recvbuf, sendcount_mpi, to_mpi_type(sendtype), tmp_recvbuf, mpi_recvcounts.data(), mpi_displs.data(), to_mpi_type(recvtype), root_mpi_rank, to_mpi_comm(comm->mpi_comm)); |
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| 148 | //printf("****************** rank %d, sendcount*num_ep = %d, sendcount_mpi = %d\n", ep_rank, sendcount*num_ep, sendcount_mpi); |
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| 149 | |
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| 150 | /*if(is_root) printf("rank %d =================tmp_recvbuf = %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d\n", ep_rank, static_cast<int*>(tmp_recvbuf)[0], static_cast<int*>(tmp_recvbuf)[1], static_cast<int*>(tmp_recvbuf)[2], |
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| 151 | static_cast<int*>(tmp_recvbuf)[3], static_cast<int*>(tmp_recvbuf)[4], static_cast<int*>(tmp_recvbuf)[5], |
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| 152 | static_cast<int*>(tmp_recvbuf)[6], static_cast<int*>(tmp_recvbuf)[7], static_cast<int*>(tmp_recvbuf)[8], |
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| 153 | static_cast<int*>(tmp_recvbuf)[9], static_cast<int*>(tmp_recvbuf)[10], static_cast<int*>(tmp_recvbuf)[11], |
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| 154 | static_cast<int*>(tmp_recvbuf)[12], static_cast<int*>(tmp_recvbuf)[13], static_cast<int*>(tmp_recvbuf)[14], |
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| 155 | static_cast<int*>(tmp_recvbuf)[15], static_cast<int*>(tmp_recvbuf)[16]);*/ |
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| 156 | } |
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| 157 | |
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| 158 | |
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| 159 | // reorder data |
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| 160 | if(is_root) |
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| 161 | { |
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| 162 | int offset; |
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| 163 | for(int i=0; i<ep_size; i++) |
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| 164 | { |
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| 165 | int extra = 0; |
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| 166 | for(int j=0, k=0; j<ep_size, k<comm->ep_rank_map->at(i).first; j++) |
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| 167 | if(comm->ep_rank_map->at(i).second == comm->ep_rank_map->at(j).second) |
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| 168 | { |
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| 169 | extra += recvcounts[j]; |
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| 170 | k++; |
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| 171 | } |
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| 172 | |
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| 173 | offset = mpi_displs[comm->ep_rank_map->at(i).second] + extra; |
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| 174 | |
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| 175 | memcpy(recvbuf+displs[i]*datasize, tmp_recvbuf+offset*datasize, recvcounts[i]*datasize); |
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| 176 | |
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| 177 | } |
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| 178 | |
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| 179 | } |
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| 180 | |
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| 181 | delete[] recvcounts; |
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| 182 | delete[] displs; |
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| 183 | |
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| 184 | if(is_master) |
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| 185 | { |
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| 186 | delete[] local_recvbuf; |
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| 187 | } |
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| 188 | if(is_root) delete[] tmp_recvbuf; |
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| 189 | } |
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| 190 | |
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| 191 | int MPI_Gatherv_intercomm(const void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, const int input_recvcounts[], const int input_displs[], |
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| 192 | MPI_Datatype recvtype, int root, MPI_Comm comm) |
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| 193 | { |
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| 194 | printf("MPI_Gatherv_intercomm not yet implemented\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 | #endif |
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