mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-12 00:59:16 +05:00
584 lines
16 KiB
C++
584 lines
16 KiB
C++
#ifdef PARALLEL
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#include <meshing.hpp>
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#include "paralleltop.hpp"
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namespace netgen
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{
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ParallelMeshTopology :: ParallelMeshTopology (const Mesh & amesh)
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: mesh(amesh)
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{
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is_updated = false;
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}
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ParallelMeshTopology :: ~ParallelMeshTopology ()
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{
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;
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}
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void ParallelMeshTopology :: Reset ()
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{
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*testout << "ParallelMeshTopology::Reset" << endl;
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if ( mesh.GetCommunicator().Size() == 1 ) return;
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int ned = mesh.GetTopology().GetNEdges();
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int nfa = mesh.GetTopology().GetNFaces();
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if (glob_edge.Size() != ned)
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{
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glob_edge.SetSize(ned);
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glob_face.SetSize(nfa);
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glob_edge = -1;
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glob_face = -1;
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loc2distedge.ChangeSize (ned);
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loc2distface.ChangeSize (nfa);
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}
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if (glob_vert.Size() != mesh.GetNV())
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{
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SetNV(mesh.GetNV());
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SetNE(mesh.GetNE());
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}
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}
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void ParallelMeshTopology :: Print() const
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{
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;
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}
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void ParallelMeshTopology :: SetDistantFaceNum (int dest, int locnum)
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{
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for ( int i = 0; i < loc2distface[locnum-1].Size(); i+=1 )
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if ( loc2distface[locnum-1][i] == dest )
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return;
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loc2distface.Add(locnum-1, dest);
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}
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void ParallelMeshTopology :: SetDistantPNum (int dest, int locnum)
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{
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for ( int i = 0; i < loc2distvert[locnum-1].Size(); i+=1 )
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if ( loc2distvert[locnum-1][i] == dest )
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return;
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loc2distvert.Add (locnum-1, dest);
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}
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void ParallelMeshTopology :: SetDistantEdgeNum (int dest, int locnum)
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{
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for ( int i = 0; i < loc2distedge[locnum-1].Size(); i+=1 )
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if ( loc2distedge[locnum-1][i] == dest )
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return;
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loc2distedge.Add (locnum-1, dest);
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}
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void ParallelMeshTopology :: SetNV (int anv)
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{
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glob_vert.SetSize(anv);
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glob_vert = -1;
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loc2distvert.ChangeSize (anv);
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}
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void ParallelMeshTopology :: SetNE ( int ane )
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{
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glob_el.SetSize (ane);
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glob_el = -1;
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}
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void ParallelMeshTopology :: SetNSE ( int anse )
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{
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glob_surfel.SetSize(anse);
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glob_surfel = -1;
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}
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void ParallelMeshTopology :: SetNSegm ( int anseg )
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{
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glob_segm.SetSize (anseg);
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glob_segm = -1;
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}
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void ParallelMeshTopology :: UpdateCoarseGridGlobal ()
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{
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// cout << "updatecoarsegridglobal called" << endl;
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if (id == 0)
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PrintMessage ( 3, "UPDATE GLOBAL COARSEGRID STARTS" );
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int timer = NgProfiler::CreateTimer ("UpdateCoarseGridGlobal");
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NgProfiler::RegionTimer reg(timer);
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*testout << "ParallelMeshTopology :: UpdateCoarseGridGlobal" << endl;
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const MeshTopology & topology = mesh.GetTopology();
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MPI_Comm comm = mesh.GetCommunicator();
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if ( id == 0 )
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{
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NgArray<NgArray<int>*> sendarrays(ntasks);
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for (int dest = 1; dest < ntasks; dest++)
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sendarrays[dest] = new NgArray<int>;
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NgArray<int> edges, faces;
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for (int el = 1; el <= mesh.GetNE(); el++)
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{
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topology.GetElementFaces (el, faces);
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topology.GetElementEdges (el, edges);
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const Element & volel = mesh.VolumeElement (el);
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// NgArray<int> & sendarray = *sendarrays[volel.GetPartition()];
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NgArray<int> & sendarray = *sendarrays[mesh.vol_partition[el-1]];
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for ( int i = 0; i < edges.Size(); i++ )
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sendarray.Append (edges[i]);
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for ( int i = 0; i < faces.Size(); i++ )
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sendarray.Append (faces[i]);
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}
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for (int el = 1; el <= mesh.GetNSE(); el++)
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{
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topology.GetSurfaceElementEdges (el, edges);
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const Element2d & surfel = mesh.SurfaceElement (el);
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// NgArray<int> & sendarray = *sendarrays[surfel.GetPartition()];
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NgArray<int> & sendarray = *sendarrays[mesh.surf_partition[el-1]];
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for ( int i = 0; i < edges.Size(); i++ )
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sendarray.Append (edges[i]);
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sendarray.Append (topology.GetSurfaceElementFace (el));
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}
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Array<MPI_Request> sendrequests;
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for (int dest = 1; dest < ntasks; dest++)
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sendrequests.Append (MyMPI_ISend (*sendarrays[dest], dest, MPI_TAG_MESH+10, comm));
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MyMPI_WaitAll (sendrequests);
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for (int dest = 1; dest < ntasks; dest++)
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delete sendarrays[dest];
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}
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else
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{
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NgArray<int> recvarray;
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MyMPI_Recv (recvarray, 0, MPI_TAG_MESH+10, comm);
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int ii = 0;
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NgArray<int> faces, edges;
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for (int volel = 1; volel <= mesh.GetNE(); volel++)
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{
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topology.GetElementEdges ( volel, edges);
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for ( int i = 0; i < edges.Size(); i++)
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SetLoc2Glob_Edge ( edges[i], recvarray[ii++]);
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topology.GetElementFaces( volel, faces);
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for ( int i = 0; i < faces.Size(); i++)
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SetLoc2Glob_Face ( faces[i], recvarray[ii++]);
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}
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for (int surfel = 1; surfel <= mesh.GetNSE(); surfel++)
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{
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topology.GetSurfaceElementEdges (surfel, edges);
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for (int i = 0; i < edges.Size(); i++)
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SetLoc2Glob_Edge (edges[i], recvarray[ii++]);
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int face = topology.GetSurfaceElementFace (surfel);
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SetLoc2Glob_Face ( face, recvarray[ii++]);
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}
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}
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is_updated = true;
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}
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void ParallelMeshTopology :: UpdateCoarseGrid ()
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{
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// cout << "UpdateCoarseGrid" << endl;
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// if (is_updated) return;
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NgMPI_Comm comm = mesh.GetCommunicator();
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int id = comm.Rank();
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int ntasks = comm.Size();
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if (ntasks == 1) return;
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Reset();
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static int timer = NgProfiler::CreateTimer ("UpdateCoarseGrid");
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NgProfiler::RegionTimer reg(timer);
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(*testout) << "UPDATE COARSE GRID PARALLEL TOPOLOGY " << endl;
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if (id == 0)
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PrintMessage (1, "update parallel topology");
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// UpdateCoarseGridGlobal();
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// MPI_Barrier (MPI_COMM_WORLD);
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MPI_Group MPI_GROUP_comm;
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MPI_Group MPI_LocalGroup;
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MPI_Comm MPI_LocalComm;
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int process_ranks[] = { 0 };
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MPI_Comm_group (comm, &MPI_GROUP_comm);
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MPI_Group_excl (MPI_GROUP_comm, 1, process_ranks, &MPI_LocalGroup);
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MPI_Comm_create (comm, MPI_LocalGroup, &MPI_LocalComm);
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if (id == 0) return;
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const MeshTopology & topology = mesh.GetTopology();
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NgArray<int> cnt_send(ntasks-1);
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// update new vertices after mesh-refinement
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if (mesh.mlbetweennodes.Size() > 0)
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{
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// cout << "UpdateCoarseGrid - vertices" << endl;
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int newnv = mesh.mlbetweennodes.Size();
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loc2distvert.ChangeSize(mesh.mlbetweennodes.Size());
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/*
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for (PointIndex pi = PointIndex::BASE; pi < newnv+PointIndex::BASE; pi++)
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{
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PointIndex v1 = mesh.mlbetweennodes[pi][0];
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PointIndex v2 = mesh.mlbetweennodes[pi][1];
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if (mesh.mlbetweennodes[pi][0] != PointIndex::BASE-1)
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for (int dest = 1; dest < ntasks; dest++)
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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SetDistantPNum(dest, pi);
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}
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*/
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bool changed = true;
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while (changed)
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{
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changed = false;
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// build exchange vertices
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cnt_send = 0;
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for (PointIndex pi : mesh.Points().Range())
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for (int dist : GetDistantPNums(pi-PointIndex::BASE))
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cnt_send[dist-1]++;
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TABLE<int> dest2vert(cnt_send);
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for (PointIndex pi : mesh.Points().Range())
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for (int dist : GetDistantPNums(pi-PointIndex::BASE))
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dest2vert.Add (dist-1, pi);
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for (PointIndex pi = PointIndex::BASE; pi < newnv+PointIndex::BASE; pi++)
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{
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PointIndex v1 = mesh.mlbetweennodes[pi][0];
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PointIndex v2 = mesh.mlbetweennodes[pi][1];
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if (mesh.mlbetweennodes[pi][0] != PointIndex::BASE-1)
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// for (int dest = 1; dest < ntasks; dest++)
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for (int dest : GetDistantPNums(v1-PointIndex::BASE))
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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cnt_send[dest-1]++;
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}
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TABLE<int> dest2pair(cnt_send);
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// for (int dest = 1; dest < ntasks; dest++)
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for (PointIndex pi = PointIndex::BASE; pi < newnv+PointIndex::BASE; pi++)
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{
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PointIndex v1 = mesh.mlbetweennodes[pi][0];
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PointIndex v2 = mesh.mlbetweennodes[pi][1];
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if (mesh.mlbetweennodes[pi][0] != PointIndex::BASE-1)
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for (int dest : GetDistantPNums(v1-PointIndex::BASE))
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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dest2pair.Add (dest-1, pi);
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}
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cnt_send = 0;
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int v1, v2;
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for (PointIndex pi = PointIndex::BASE; pi < newnv+PointIndex::BASE; pi++)
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{
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PointIndex v1 = mesh.mlbetweennodes[pi][0];
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PointIndex v2 = mesh.mlbetweennodes[pi][1];
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if (mesh.mlbetweennodes[pi][0] != PointIndex::BASE-1)
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for (int dest : GetDistantPNums(v1-PointIndex::BASE))
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if (IsExchangeVert(dest, v2))
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cnt_send[dest-1]+=2;
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}
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TABLE<int> send_verts(cnt_send);
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NgArray<int, PointIndex::BASE> loc2exchange(mesh.GetNV());
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for (int dest = 1; dest < ntasks; dest++)
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if (dest != id)
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{
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loc2exchange = -1;
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int cnt = 0;
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/*
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for (PointIndex pi : mesh.Points().Range())
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if (IsExchangeVert(dest, pi))
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loc2exchange[pi] = cnt++;
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*/
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for (PointIndex pi : dest2vert[dest-1])
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loc2exchange[pi] = cnt++;
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// for (PointIndex pi = PointIndex::BASE; pi < newnv+PointIndex::BASE; pi++)
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for (PointIndex pi : dest2pair[dest-1])
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{
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PointIndex v1 = mesh.mlbetweennodes[pi][0];
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PointIndex v2 = mesh.mlbetweennodes[pi][1];
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if (mesh.mlbetweennodes[pi][0] != PointIndex::BASE-1)
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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{
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send_verts.Add (dest-1, loc2exchange[v1]);
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send_verts.Add (dest-1, loc2exchange[v2]);
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}
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}
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}
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TABLE<int> recv_verts(ntasks-1);
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MyMPI_ExchangeTable (send_verts, recv_verts, MPI_TAG_MESH+9, MPI_LocalComm);
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for (int dest = 1; dest < ntasks; dest++)
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if (dest != id)
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{
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loc2exchange = -1;
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int cnt = 0;
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/*
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for (PointIndex pi : mesh.Points().Range())
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if (IsExchangeVert(dest, pi))
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loc2exchange[pi] = cnt++;
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*/
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for (PointIndex pi : dest2vert[dest-1])
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loc2exchange[pi] = cnt++;
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NgFlatArray<int> recvarray = recv_verts[dest-1];
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for (int ii = 0; ii < recvarray.Size(); ii+=2)
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for (PointIndex pi : dest2pair[dest-1])
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// for (PointIndex pi = PointIndex::BASE; pi < newnv+PointIndex::BASE; pi++)
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{
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PointIndex v1 = mesh.mlbetweennodes[pi][0];
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PointIndex v2 = mesh.mlbetweennodes[pi][1];
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if (mesh.mlbetweennodes[pi][0] != PointIndex::BASE-1)
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{
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INDEX_2 re(recvarray[ii], recvarray[ii+1]);
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INDEX_2 es(loc2exchange[v1], loc2exchange[v2]);
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if (es == re && !IsExchangeVert(dest, pi))
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{
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SetDistantPNum(dest, pi);
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changed = true;
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}
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}
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}
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}
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}
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}
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NgArray<int> sendarray, recvarray;
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// cout << "UpdateCoarseGrid - edges" << endl;
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// static int timerv = NgProfiler::CreateTimer ("UpdateCoarseGrid - ex vertices");
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static int timere = NgProfiler::CreateTimer ("UpdateCoarseGrid - ex edges");
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static int timerf = NgProfiler::CreateTimer ("UpdateCoarseGrid - ex faces");
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NgProfiler::StartTimer (timere);
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int nfa = topology . GetNFaces();
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int ned = topology . GetNEdges();
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// build exchange vertices
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cnt_send = 0;
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for (PointIndex pi : mesh.Points().Range())
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for (int dist : GetDistantPNums(pi-PointIndex::BASE))
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cnt_send[dist-1]++;
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TABLE<int> dest2vert(cnt_send);
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for (PointIndex pi : mesh.Points().Range())
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for (int dist : GetDistantPNums(pi-PointIndex::BASE))
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dest2vert.Add (dist-1, pi);
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// exchange edges
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cnt_send = 0;
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int v1, v2;
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for (int edge = 1; edge <= ned; edge++)
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{
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topology.GetEdgeVertices (edge, v1, v2);
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for (int dest = 1; dest < ntasks; dest++)
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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cnt_send[dest-1]+=1;
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}
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TABLE<int> dest2edge(cnt_send);
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for (int & v : cnt_send) v *= 2;
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TABLE<int> send_edges(cnt_send);
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for (int edge = 1; edge <= ned; edge++)
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{
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topology.GetEdgeVertices (edge, v1, v2);
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for (int dest = 1; dest < ntasks; dest++)
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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dest2edge.Add (dest-1, edge);
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}
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NgArray<int, PointIndex::BASE> loc2exchange(mesh.GetNV());
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for (int dest = 1; dest < ntasks; dest++)
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{
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loc2exchange = -1;
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int cnt = 0;
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for (PointIndex pi : dest2vert[dest-1])
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loc2exchange[pi] = cnt++;
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for (int edge : dest2edge[dest-1])
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{
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topology.GetEdgeVertices (edge, v1, v2);
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if (IsExchangeVert (dest, v1) && IsExchangeVert (dest, v2))
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{
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send_edges.Add (dest-1, loc2exchange[v1]);
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send_edges.Add (dest-1, loc2exchange[v2]);
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}
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}
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}
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// cout << "UpdateCoarseGrid - edges mpi-exchange" << endl;
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TABLE<int> recv_edges(ntasks-1);
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MyMPI_ExchangeTable (send_edges, recv_edges, MPI_TAG_MESH+9, MPI_LocalComm);
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// cout << "UpdateCoarseGrid - edges mpi-exchange done" << endl;
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for (int dest = 1; dest < ntasks; dest++)
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{
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auto ex2loc = dest2vert[dest-1];
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if (ex2loc.Size() == 0) continue;
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INDEX_2_CLOSED_HASHTABLE<int> vert2edge(2*dest2edge[dest-1].Size()+10);
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for (int edge : dest2edge[dest-1])
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{
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topology.GetEdgeVertices (edge, v1, v2);
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vert2edge.Set(INDEX_2(v1,v2), edge);
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}
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NgFlatArray<int> recvarray = recv_edges[dest-1];
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for (int ii = 0; ii < recvarray.Size(); ii+=2)
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{
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INDEX_2 re(ex2loc[recvarray[ii]],
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ex2loc[recvarray[ii+1]]);
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if (vert2edge.Used(re))
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SetDistantEdgeNum(dest, vert2edge.Get(re));
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}
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}
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NgProfiler::StopTimer (timere);
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// cout << "UpdateCoarseGrid - faces" << endl;
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if (mesh.GetDimension() == 3)
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{
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NgProfiler::StartTimer (timerf);
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NgArray<int> verts;
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// exchange faces
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cnt_send = 0;
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for (int face = 1; face <= nfa; face++)
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{
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topology.GetFaceVertices (face, verts);
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for (int dest = 1; dest < ntasks; dest++)
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if (dest != id)
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if (IsExchangeVert (dest, verts[0]) &&
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IsExchangeVert (dest, verts[1]) &&
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IsExchangeVert (dest, verts[2]))
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cnt_send[dest-1]++;
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}
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TABLE<int> dest2face(cnt_send);
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for (int face = 1; face <= nfa; face++)
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{
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topology.GetFaceVertices (face, verts);
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for (int dest = 1; dest < ntasks; dest++)
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if (dest != id)
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if (IsExchangeVert (dest, verts[0]) &&
|
|
IsExchangeVert (dest, verts[1]) &&
|
|
IsExchangeVert (dest, verts[2]))
|
|
dest2face.Add(dest-1, face);
|
|
}
|
|
|
|
for (int & c : cnt_send) c*=3;
|
|
TABLE<int> send_faces(cnt_send);
|
|
NgArray<int, PointIndex::BASE> loc2exchange(mesh.GetNV());
|
|
for (int dest = 1; dest < ntasks; dest++)
|
|
if (dest != id)
|
|
{
|
|
if (dest2vert[dest-1].Size() == 0) continue;
|
|
|
|
loc2exchange = -1;
|
|
int cnt = 0;
|
|
for (PointIndex pi : dest2vert[dest-1])
|
|
loc2exchange[pi] = cnt++;
|
|
|
|
for (int face : dest2face[dest-1])
|
|
{
|
|
topology.GetFaceVertices (face, verts);
|
|
if (IsExchangeVert (dest, verts[0]) &&
|
|
IsExchangeVert (dest, verts[1]) &&
|
|
IsExchangeVert (dest, verts[2]))
|
|
{
|
|
send_faces.Add (dest-1, loc2exchange[verts[0]]);
|
|
send_faces.Add (dest-1, loc2exchange[verts[1]]);
|
|
send_faces.Add (dest-1, loc2exchange[verts[2]]);
|
|
}
|
|
}
|
|
}
|
|
|
|
// cout << "UpdateCoarseGrid - faces mpi-exchange" << endl;
|
|
TABLE<int> recv_faces(ntasks-1);
|
|
MyMPI_ExchangeTable (send_faces, recv_faces, MPI_TAG_MESH+9, MPI_LocalComm);
|
|
// cout << "UpdateCoarseGrid - faces mpi-exchange done" << endl;
|
|
|
|
for (int dest = 1; dest < ntasks; dest++)
|
|
{
|
|
auto ex2loc = dest2vert[dest-1];
|
|
if (ex2loc.Size() == 0) continue;
|
|
|
|
INDEX_3_CLOSED_HASHTABLE<int> vert2face(2*dest2face[dest-1].Size()+10);
|
|
for (int face : dest2face[dest-1])
|
|
{
|
|
topology.GetFaceVertices (face, verts);
|
|
vert2face.Set(INDEX_3(verts[0], verts[1], verts[2]), face);
|
|
}
|
|
|
|
NgFlatArray<int> recvarray = recv_faces[dest-1];
|
|
for (int ii = 0; ii < recvarray.Size(); ii+=3)
|
|
{
|
|
INDEX_3 re(ex2loc[recvarray[ii]],
|
|
ex2loc[recvarray[ii+1]],
|
|
ex2loc[recvarray[ii+2]]);
|
|
if (vert2face.Used(re))
|
|
SetDistantFaceNum(dest, vert2face.Get(re));
|
|
}
|
|
}
|
|
|
|
NgProfiler::StopTimer (timerf);
|
|
}
|
|
// cout << "UpdateCoarseGrid - done" << endl;
|
|
|
|
is_updated = true;
|
|
|
|
MPI_Group_free(&MPI_LocalGroup);
|
|
MPI_Comm_free(&MPI_LocalComm);
|
|
}
|
|
}
|
|
|
|
|
|
#endif
|