mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-26 22:00:33 +05:00
1174 lines
27 KiB
C++
1174 lines
27 KiB
C++
#ifdef PARALLEL
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#include <meshing.hpp>
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#include "paralleltop.hpp"
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#define METIS4
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#ifdef METIS
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namespace metis {
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extern "C" {
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#ifdef METIS4
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#include <metis.h>
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typedef idxtype idx_t;
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#else
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#include <metis.h>
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typedef idx_t idxtype;
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#endif
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}
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}
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using namespace metis;
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#endif
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namespace netgen
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{
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template <>
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inline MPI_Datatype MyGetMPIType<netgen::PointIndex> ( )
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{ return MPI_INT; }
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void Mesh :: SendRecvMesh ()
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{
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if (id == 0)
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PrintMessage (1, "Send/Receive mesh");
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{
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// distribute global information
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int nelglob, nseglob, nvglob;
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if (id == 0)
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{
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paralleltop -> SetNV (GetNV());
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paralleltop -> SetNE (GetNE());
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paralleltop -> SetNSegm (GetNSeg());
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paralleltop -> SetNSE (GetNSE());
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nelglob = GetNE();
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nseglob = GetNSE();
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nvglob = GetNV();
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}
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MyMPI_Bcast (dimension);
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MyMPI_Bcast (nelglob);
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MyMPI_Bcast (nseglob);
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MyMPI_Bcast (nvglob);
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if (id > 0)
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{
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paralleltop -> SetNEGlob (nelglob);
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paralleltop -> SetNSEGlob (nseglob);
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paralleltop -> SetNVGlob (nvglob);
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}
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}
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{
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// distribute number of local elements
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if (id == 0)
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{
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Array<int> num_els_on_proc(ntasks);
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num_els_on_proc = 0;
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for (ElementIndex ei = 0; ei < GetNE(); ei++)
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num_els_on_proc[(*this)[ei].GetPartition()]++;
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MPI_Scatter (&num_els_on_proc[0], 1, MPI_INT,
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MPI_IN_PLACE, -1, MPI_INT, 0, MPI_COMM_WORLD);
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}
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else
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{
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int nelloc;
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MPI_Scatter (NULL, 0, MPI_INT,
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&nelloc, 1, MPI_INT, 0, MPI_COMM_WORLD);
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paralleltop -> SetNE (nelloc);
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}
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}
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if (id == 0)
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SendMesh ();
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else
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ReceiveParallelMesh();
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}
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void Mesh :: SendMesh () const
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{
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Array<MPI_Request> sendrequests;
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PrintMessage ( 3, "Sending vertices");
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Array<int> num_els_on_proc(ntasks);
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num_els_on_proc = 0;
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for (ElementIndex ei = 0; ei < GetNE(); ei++)
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num_els_on_proc[(*this)[ei].GetPartition()]++;
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TABLE<ElementIndex> els_of_proc (num_els_on_proc);
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for (ElementIndex ei = 0; ei < GetNE(); ei++)
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els_of_proc.Add ( (*this)[ei].GetPartition(), ei);
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Array<int> num_sels_on_proc(ntasks);
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num_sels_on_proc = 0;
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for (SurfaceElementIndex ei = 0; ei < GetNSE(); ei++)
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num_sels_on_proc[(*this)[ei].GetPartition()]++;
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TABLE<SurfaceElementIndex> sels_of_proc (num_sels_on_proc);
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for (SurfaceElementIndex ei = 0; ei < GetNSE(); ei++)
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sels_of_proc.Add ( (*this)[ei].GetPartition(), ei);
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Array<int, PointIndex::BASE> vert_flag (GetNV());
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Array<int, PointIndex::BASE> num_procs_on_vert (GetNV());
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Array<int> num_verts_on_proc (ntasks);
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num_verts_on_proc = 0;
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num_procs_on_vert = 0;
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vert_flag = -1;
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Array<int> nelloc (ntasks);
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nelloc = 0;
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Array<int> nselloc (ntasks);
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nselloc = 0;
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for (int dest = 1; dest < ntasks; dest++)
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{
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FlatArray<ElementIndex> els = els_of_proc[dest];
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for (int hi = 0; hi < els.Size(); hi++)
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{
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const Element & el = (*this) [ els[hi] ];
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for (int i = 0; i < el.GetNP(); i++)
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{
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PointIndex epi = el[i];
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if (vert_flag[epi] < dest)
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{
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vert_flag[epi] = dest;
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num_verts_on_proc[dest]++;
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num_procs_on_vert[epi]++;
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paralleltop -> SetDistantPNum ( dest, epi, num_verts_on_proc[dest]);
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}
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}
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nelloc[dest] ++;
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paralleltop -> SetDistantEl ( dest, els[hi]+1, nelloc[dest] );
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}
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FlatArray<SurfaceElementIndex> sels = sels_of_proc[dest];
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for (int hi = 0; hi < sels.Size(); hi++)
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{
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const Element2d & el = (*this) [ sels[hi] ];
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for (int i = 0; i < el.GetNP(); i++)
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{
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PointIndex epi = el[i];
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if (vert_flag[epi] < dest)
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{
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vert_flag[epi] = dest;
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num_verts_on_proc[dest]++;
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num_procs_on_vert[epi]++;
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paralleltop -> SetDistantPNum ( dest, epi, num_verts_on_proc[dest]);
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}
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}
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nselloc[dest] ++;
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paralleltop -> SetDistantSurfEl ( dest, sels[hi]+1, nselloc[dest] );
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}
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}
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TABLE<PointIndex> verts_of_proc (num_verts_on_proc);
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TABLE<int, PointIndex::BASE> procs_of_vert (num_procs_on_vert);
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TABLE<int, PointIndex::BASE> loc_num_of_vert (num_procs_on_vert);
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vert_flag = -1;
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for (int dest = 1; dest < ntasks; dest++)
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{
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FlatArray<ElementIndex> els = els_of_proc[dest];
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for (int hi = 0; hi < els.Size(); hi++)
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{
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const Element & el = (*this) [ els[hi] ];
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for (int i = 0; i < el.GetNP(); i++)
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{
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PointIndex epi = el[i];
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if (vert_flag[epi] < dest)
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{
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vert_flag[epi] = dest;
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procs_of_vert.Add (epi, dest);
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}
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}
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}
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FlatArray<SurfaceElementIndex> sels = sels_of_proc[dest];
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for (int hi = 0; hi < sels.Size(); hi++)
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{
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const Element2d & el = (*this) [ sels[hi] ];
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for (int i = 0; i < el.GetNP(); i++)
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{
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PointIndex epi = el[i];
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if (vert_flag[epi] < dest)
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{
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vert_flag[epi] = dest;
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procs_of_vert.Add (epi, dest);
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}
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}
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}
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}
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for (int vert = 1; vert <= GetNP(); vert++ )
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{
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FlatArray<int> procs = procs_of_vert[vert];
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for (int j = 0; j < procs.Size(); j++)
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{
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int dest = procs[j];
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verts_of_proc.Add (dest, vert);
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loc_num_of_vert.Add (vert, verts_of_proc[dest].Size());
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}
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}
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for (int dest = 1; dest < ntasks; dest++)
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{
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FlatArray<PointIndex> verts = verts_of_proc[dest];
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sendrequests.Append (MyMPI_ISend (verts, dest, MPI_TAG_MESH+1));
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MPI_Datatype mptype = MeshPoint::MyGetMPIType();
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int numv = verts.Size();
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MPI_Datatype newtype;
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Array<int> blocklen (numv);
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blocklen = 1;
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MPI_Type_indexed (numv, &blocklen[0],
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reinterpret_cast<int*> (&verts[0]),
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mptype, &newtype);
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MPI_Type_commit (&newtype);
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MPI_Request request;
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MPI_Isend( &points[0], 1, newtype, dest, MPI_TAG_MESH+1, MPI_COMM_WORLD, &request);
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sendrequests.Append (request);
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}
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Array<int> num_distpnums(ntasks);
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num_distpnums = 0;
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for (int vert = 1; vert <= GetNP(); vert++)
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{
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FlatArray<int> procs = procs_of_vert[vert];
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for (int j = 0; j < procs.Size(); j++)
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num_distpnums[procs[j]] += 3 * (procs.Size()-1);
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}
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TABLE<int> distpnums (num_distpnums);
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for (int vert = 1; vert <= GetNP(); vert++)
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{
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FlatArray<int> procs = procs_of_vert[vert];
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for (int j = 0; j < procs.Size(); j++)
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for (int k = 0; k < procs.Size(); k++)
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if (j != k)
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{
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distpnums.Add (procs[j], loc_num_of_vert[vert][j]);
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distpnums.Add (procs[j], procs_of_vert[vert][k]);
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distpnums.Add (procs[j], loc_num_of_vert[vert][k]);
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}
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}
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for ( int dest = 1; dest < ntasks; dest ++ )
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sendrequests.Append (MyMPI_ISend (distpnums[dest], dest, MPI_TAG_MESH+1));
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PrintMessage ( 3, "Sending elements" );
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Array<int> elarraysize (ntasks);
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elarraysize = 0;
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for ( int ei = 1; ei <= GetNE(); ei++)
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{
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const Element & el = VolumeElement (ei);
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int dest = el.GetPartition();
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elarraysize[dest] += 3 + el.GetNP();
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}
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TABLE<int> elementarrays(elarraysize);
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for (int ei = 1; ei <= GetNE(); ei++)
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{
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const Element & el = VolumeElement (ei);
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int dest = el.GetPartition();
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elementarrays.Add (dest, ei);
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elementarrays.Add (dest, el.GetIndex());
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elementarrays.Add (dest, el.GetNP());
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for (int i = 0; i < el.GetNP(); i++)
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elementarrays.Add (dest, el[i]);
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}
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for (int dest = 1; dest < ntasks; dest ++ )
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sendrequests.Append (MyMPI_ISend (elementarrays[dest], dest, MPI_TAG_MESH+2));
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PrintMessage ( 3, "Sending Face Descriptors" );
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Array<double> fddata (6 * GetNFD());
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for (int fdi = 1; fdi <= GetNFD(); fdi++)
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{
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fddata[6*fdi-6] = GetFaceDescriptor(fdi).SurfNr();
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fddata[6*fdi-5] = GetFaceDescriptor(fdi).DomainIn();
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fddata[6*fdi-4] = GetFaceDescriptor(fdi).DomainOut();
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fddata[6*fdi-3] = GetFaceDescriptor(fdi).BCProperty();
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fddata[6*fdi-2] = GetFaceDescriptor(fdi).domin_singular;
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fddata[6*fdi-1] = GetFaceDescriptor(fdi).domout_singular;
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}
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for (int dest = 1; dest < ntasks; dest++)
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sendrequests.Append (MyMPI_ISend (fddata, dest, MPI_TAG_MESH+3));
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PrintMessage ( 3, "Sending Surface elements" );
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Array <int> nlocsel(ntasks), bufsize(ntasks);
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nlocsel = 0;
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bufsize = 1;
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for (int sei = 1; sei <= GetNSE(); sei++ )
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{
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const Element2d & sel = SurfaceElement (sei);
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int dest = sel.GetPartition();
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nlocsel[dest] ++;
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bufsize[dest] += 4 + 2*sel.GetNP();
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}
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TABLE<int> selbuf(bufsize);
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for (int dest = 1; dest < ntasks; dest++ )
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selbuf.Add (dest, nlocsel[dest]);
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for (int sei = 1; sei <= GetNSE(); sei ++ )
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{
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const Element2d & sel = SurfaceElement (sei);
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int dest = sel.GetPartition();
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selbuf.Add (dest, sei);
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selbuf.Add (dest, sel.GetIndex());
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selbuf.Add (dest, 0);
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selbuf.Add (dest, sel.GetNP());
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for ( int ii = 1; ii <= sel.GetNP(); ii++)
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{
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selbuf.Add (dest, sel.PNum(ii));
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selbuf.Add (dest, sel.GeomInfoPi(ii).trignum);
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}
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}
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for (int dest = 1; dest < ntasks; dest++)
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sendrequests.Append (MyMPI_ISend(selbuf[dest], dest, MPI_TAG_MESH+4));
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PrintMessage ( 3, "Sending Edge Segments");
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Array <int> nlocseg(ntasks), segi(ntasks);
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for ( int i = 0; i < ntasks; i++)
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{
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nlocseg[i] = 0;
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bufsize[i] = 0;
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segi[i] = 0;
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}
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for (int segi = 1; segi <= GetNSeg(); segi ++ )
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{
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Array<int> volels;
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const MeshTopology & topol = GetTopology();
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topol . GetSegmentSurfaceElements ( segi, volels );
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for (int j = 0; j < volels.Size(); j++)
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{
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int ei = volels[j];
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if ( ei > 0 && ei <= GetNSE() )
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{
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const Element2d & el = SurfaceElement (ei);
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int dest = el.GetPartition();
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nlocseg[dest] ++;
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bufsize[dest] += 14;
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}
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}
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}
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TABLE<double> segmbuf(bufsize);
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for ( int ls=1; ls <= GetNSeg(); ls++)
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{
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Array<int> volels;
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GetTopology().GetSegmentSurfaceElements ( ls, volels );
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const Segment & seg = LineSegment (ls);
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for (int j = 0; j < volels.Size(); j++)
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{
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int ei = volels[j];
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if ( ei > 0 && ei <= GetNSE() )
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{
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const Element2d & el = SurfaceElement (ei);
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int dest = el.GetPartition();
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if ( dest > 0 )
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{
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segmbuf.Add (dest, ls);
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segmbuf.Add (dest, seg.si);
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segmbuf.Add (dest, seg.pnums[0]);
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segmbuf.Add (dest, seg.pnums[1]);
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segmbuf.Add (dest, seg.geominfo[0].trignum);
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segmbuf.Add (dest, seg.geominfo[1].trignum);
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segmbuf.Add (dest, seg.surfnr1);
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segmbuf.Add (dest, seg.surfnr2);
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segmbuf.Add (dest, seg.edgenr);
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segmbuf.Add (dest, seg.epgeominfo[0].dist);
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segmbuf.Add (dest, seg.epgeominfo[1].edgenr);
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segmbuf.Add (dest, seg.epgeominfo[1].dist);
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segmbuf.Add (dest, seg.singedge_right);
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segmbuf.Add (dest, seg.singedge_left);
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segi[dest] += 14;
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}
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paralleltop -> SetDistantSegm ( dest, ls, int ( segi[dest] / 14 ) );
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}
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}
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}
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for ( int dest = 1; dest < ntasks; dest++)
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sendrequests.Append (MyMPI_ISend(segmbuf[dest], dest, MPI_TAG_MESH+5));
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MPI_Waitall (sendrequests.Size(), &sendrequests[0], MPI_STATUS_IGNORE);
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MPI_Barrier(MPI_COMM_WORLD);
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}
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// slaves receive the mesh from the master
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void Mesh :: ReceiveParallelMesh ( )
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{
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int timer = NgProfiler::CreateTimer ("ReceiveParallelMesh");
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int timer_pts = NgProfiler::CreateTimer ("Receive points");
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int timer_els = NgProfiler::CreateTimer ("Receive elements");
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int timer_sels = NgProfiler::CreateTimer ("Receive surface elements");
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NgProfiler::RegionTimer reg(timer);
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// string st;
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// receive vertices
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NgProfiler::StartTimer (timer_pts);
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Array<int> verts;
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MyMPI_Recv (verts, 0, MPI_TAG_MESH+1);
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int numvert = verts.Size();
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paralleltop -> SetNV (numvert);
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// INDEX_CLOSED_HASHTABLE<int> glob2loc_vert_ht (3*numvert+1);
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INDEX_HASHTABLE<int> glob2loc_vert_ht (3*numvert+1);
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for (int vert = 0; vert < numvert; vert++)
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{
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int globvert = verts[vert];
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paralleltop->SetLoc2Glob_Vert ( vert+1, globvert );
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glob2loc_vert_ht.Set (globvert, vert+1);
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}
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for (int i = 0; i < numvert; i++)
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AddPoint (netgen::Point<3> (0,0,0));
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MPI_Datatype mptype = MeshPoint::MyGetMPIType();
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MPI_Status status;
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MPI_Recv( &points[1], numvert, mptype, 0, MPI_TAG_MESH+1, MPI_COMM_WORLD, &status);
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Array<int> dist_pnums;
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MyMPI_Recv (dist_pnums, 0, MPI_TAG_MESH+1);
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for (int hi = 0; hi < dist_pnums.Size(); hi += 3)
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paralleltop ->
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SetDistantPNum (dist_pnums[hi+1], dist_pnums[hi], dist_pnums[hi+2]);
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NgProfiler::StopTimer (timer_pts);
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*testout << "got " << numvert << " vertices" << endl;
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{
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Element el;
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Array<int> elarray;
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MyMPI_Recv (elarray, 0, MPI_TAG_MESH+2);
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NgProfiler::RegionTimer reg(timer_els);
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|
|
for (int ind = 0, elnum = 1; ind < elarray.Size(); elnum++)
|
|
{
|
|
paralleltop->SetLoc2Glob_VolEl ( elnum, elarray[ind++]);
|
|
|
|
el.SetIndex(elarray[ind++]);
|
|
el.SetNP(elarray[ind++]);
|
|
|
|
for ( int j = 0; j < el.GetNP(); j++)
|
|
el[j] = glob2loc_vert_ht.Get (elarray[ind++]);
|
|
|
|
AddVolumeElement (el);
|
|
}
|
|
}
|
|
|
|
{
|
|
Array<double> fddata;
|
|
MyMPI_Recv (fddata, 0, MPI_TAG_MESH+3);
|
|
for (int i = 0; i < fddata.Size(); i += 6)
|
|
{
|
|
int faceind = AddFaceDescriptor (FaceDescriptor(int(fddata[i]), int(fddata[i+1]), int(fddata[i+2]), 0));
|
|
GetFaceDescriptor(faceind).SetBCProperty (int(fddata[i+3]));
|
|
GetFaceDescriptor(faceind).domin_singular = fddata[i+4];
|
|
GetFaceDescriptor(faceind).domout_singular = fddata[i+5];
|
|
}
|
|
}
|
|
|
|
{
|
|
NgProfiler::RegionTimer reg(timer_sels);
|
|
Array<int> selbuf;
|
|
|
|
MyMPI_Recv ( selbuf, 0, MPI_TAG_MESH+4);
|
|
|
|
int ii = 0;
|
|
int sel = 0;
|
|
|
|
int nlocsel = selbuf[ii++];
|
|
paralleltop -> SetNSE ( nlocsel );
|
|
|
|
while (ii < selbuf.Size()-1)
|
|
{
|
|
int globsel = selbuf[ii++];
|
|
int faceind = selbuf[ii++];
|
|
bool isghost = selbuf[ii++];
|
|
int nep = selbuf[ii++];
|
|
Element2d tri(nep);
|
|
tri.SetIndex(faceind);
|
|
for(int j = 1; j <= nep; j++)
|
|
{
|
|
tri.PNum(j) = glob2loc_vert_ht.Get (selbuf[ii++]);
|
|
tri.GeomInfoPi(j).trignum = selbuf[ii++];
|
|
}
|
|
|
|
tri.SetGhost(isghost);
|
|
|
|
paralleltop->SetLoc2Glob_SurfEl ( sel+1, globsel );
|
|
AddSurfaceElement (tri);
|
|
sel ++;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
{
|
|
Array<double> segmbuf;
|
|
MyMPI_Recv ( segmbuf, 0, MPI_TAG_MESH+5);
|
|
|
|
Segment seg;
|
|
int globsegi;
|
|
int ii = 0;
|
|
int segi = 1;
|
|
int nsegloc = int ( segmbuf.Size() / 14 ) ;
|
|
paralleltop -> SetNSegm ( nsegloc );
|
|
while ( ii < segmbuf.Size() )
|
|
{
|
|
globsegi = int (segmbuf[ii++]);
|
|
seg.si = int (segmbuf[ii++]);
|
|
|
|
seg.pnums[0] = glob2loc_vert_ht.Get (int(segmbuf[ii++]));
|
|
seg.pnums[1] = glob2loc_vert_ht.Get (int(segmbuf[ii++]));
|
|
seg.geominfo[0].trignum = int( segmbuf[ii++] );
|
|
seg.geominfo[1].trignum = int ( segmbuf[ii++]);
|
|
seg.surfnr1 = int ( segmbuf[ii++]);
|
|
seg.surfnr2 = int ( segmbuf[ii++]);
|
|
seg.edgenr = int ( segmbuf[ii++]);
|
|
seg.epgeominfo[0].dist = segmbuf[ii++];
|
|
seg.epgeominfo[1].edgenr = int (segmbuf[ii++]);
|
|
seg.epgeominfo[1].dist = segmbuf[ii++];
|
|
|
|
seg.singedge_left = segmbuf[ii++];
|
|
seg.singedge_right = segmbuf[ii++];
|
|
|
|
seg.epgeominfo[0].edgenr = seg.epgeominfo[1].edgenr;
|
|
|
|
seg.domin = seg.surfnr1;
|
|
seg.domout = seg.surfnr2;
|
|
if ( seg.pnums[0] >0 && seg.pnums[1] > 0 )
|
|
{
|
|
paralleltop-> SetLoc2Glob_Segm ( segi, globsegi );
|
|
|
|
AddSegment (seg);
|
|
segi++;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
MPI_Barrier(MPI_COMM_WORLD);
|
|
|
|
int timerloc = NgProfiler::CreateTimer ("Update local mesh");
|
|
int timerloc2 = NgProfiler::CreateTimer ("CalcSurfacesOfNode");
|
|
|
|
NgProfiler::RegionTimer regloc(timerloc);
|
|
PrintMessage (2, "Got ", GetNE(), " elements and ", GetNSE(), " surface elements");
|
|
// PrintMessage (2, "Got ", GetNSE(), " surface elements");
|
|
|
|
NgProfiler::StartTimer (timerloc2);
|
|
|
|
CalcSurfacesOfNode ();
|
|
|
|
NgProfiler::StopTimer (timerloc2);
|
|
|
|
topology -> Update();
|
|
clusters -> Update();
|
|
|
|
SetNextMajorTimeStamp();
|
|
// paralleltop->Print();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// distribute the mesh to the slave processors
|
|
// call it only for the master !
|
|
void Mesh :: Distribute ()
|
|
{
|
|
if (id != 0 || ntasks == 1 ) return;
|
|
|
|
#ifdef METIS
|
|
ParallelMetis ();
|
|
#else
|
|
for (ElementIndex ei = 0; ei < GetNE(); ei++)
|
|
(*this)[ei].SetPartition(ntasks * ei/GetNE() + 1);
|
|
#endif
|
|
|
|
for (ElementIndex ei = 0; ei < GetNE(); ei++)
|
|
*testout << "el(" << ei << ") is in part " << (*this)[ei].GetPartition() << endl;
|
|
for (SurfaceElementIndex ei = 0; ei < GetNSE(); ei++)
|
|
*testout << "sel(" << int(ei) << ") is in part " << (*this)[ei].GetPartition() << endl;
|
|
|
|
// send partition
|
|
MyMPI_SendCmd ("mesh");
|
|
SendRecvMesh ();
|
|
|
|
paralleltop -> UpdateCoarseGrid();
|
|
// paralleltop -> Print();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef METIS
|
|
void Mesh :: ParallelMetis ( )
|
|
{
|
|
int timer = NgProfiler::CreateTimer ("Mesh::Partition");
|
|
NgProfiler::RegionTimer reg(timer);
|
|
|
|
PrintMessage (3, "Metis called");
|
|
|
|
if (GetDimension() == 2)
|
|
{
|
|
PartDualHybridMesh2D ( ); // neloc );
|
|
return;
|
|
}
|
|
|
|
|
|
idx_t ne = GetNE();
|
|
idx_t nn = GetNP();
|
|
|
|
if (ntasks <= 2 || ne <= 1)
|
|
{
|
|
if (ntasks == 1) return;
|
|
|
|
for (int i=1; i<=ne; i++)
|
|
VolumeElement(i).SetPartition(1);
|
|
|
|
for (int i=1; i<=GetNSE(); i++)
|
|
SurfaceElement(i).SetPartition(1);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
bool uniform_els = true;
|
|
|
|
ELEMENT_TYPE elementtype = TET;
|
|
for ( int el = 1; el <= GetNE(); el++ )
|
|
if ( VolumeElement(el).GetType() != elementtype )
|
|
{
|
|
uniform_els = false;
|
|
break;
|
|
}
|
|
|
|
|
|
if (!uniform_els)
|
|
{
|
|
PartHybridMesh ();
|
|
}
|
|
else
|
|
{
|
|
|
|
// uniform (TET) mesh, JS
|
|
int npe = VolumeElement(1).GetNP();
|
|
Array<idxtype> elmnts(ne*npe);
|
|
|
|
int etype;
|
|
if (elementtype == TET)
|
|
etype = 2;
|
|
else if (elementtype == HEX)
|
|
etype = 3;
|
|
|
|
|
|
for (int i=1; i<=ne; i++)
|
|
for (int j=1; j<=npe; j++)
|
|
elmnts[(i-1)*npe+(j-1)] = VolumeElement(i).PNum(j)-1;
|
|
|
|
int numflag = 0;
|
|
int nparts = ntasks-1;
|
|
int ncommon = 3;
|
|
int edgecut;
|
|
Array<idxtype> epart(ne), npart(nn);
|
|
|
|
// if ( ntasks == 1 )
|
|
// {
|
|
// (*this) = *mastermesh;
|
|
// nparts = 4;
|
|
// metis :: METIS_PartMeshDual (&ne, &nn, elmnts, &etype, &numflag, &nparts,
|
|
// &edgecut, epart, npart);
|
|
// cout << "done" << endl;
|
|
|
|
// cout << "edge-cut: " << edgecut << ", balance: " << metis :: ComputeElementBalance(ne, nparts, epart) << endl;
|
|
|
|
// for (int i=1; i<=ne; i++)
|
|
// {
|
|
// mastermesh->VolumeElement(i).SetPartition(epart[i-1]);
|
|
// }
|
|
|
|
// return;
|
|
// }
|
|
|
|
|
|
|
|
|
|
int timermetis = NgProfiler::CreateTimer ("Metis itself");
|
|
NgProfiler::StartTimer (timermetis);
|
|
|
|
#ifdef METIS4
|
|
cout << "call metis ... " << flush;
|
|
METIS_PartMeshDual (&ne, &nn, &elmnts[0], &etype, &numflag, &nparts,
|
|
&edgecut, &epart[0], &npart[0]);
|
|
#else
|
|
cout << "call metis-5 ... " << endl;
|
|
idx_t options[METIS_NOPTIONS];
|
|
|
|
Array<idx_t> eptr(ne+1);
|
|
for (int j = 0; j < ne+1; j++)
|
|
eptr[j] = 4*j;
|
|
|
|
METIS_PartMeshDual (&ne, &nn, &eptr[0], &elmnts[0], NULL, NULL, &ncommon, &nparts,
|
|
NULL, NULL,
|
|
&edgecut, &epart[0], &npart[0]);
|
|
#endif
|
|
|
|
NgProfiler::StopTimer (timermetis);
|
|
|
|
cout << "complete" << endl;
|
|
#ifdef METIS4
|
|
cout << "edge-cut: " << edgecut << ", balance: "
|
|
<< ComputeElementBalance(ne, nparts, &epart[0]) << endl;
|
|
#endif
|
|
|
|
// partition numbering by metis : 0 ... ntasks - 1
|
|
// we want: 1 ... ntasks
|
|
for (int i=1; i<=ne; i++)
|
|
VolumeElement(i).SetPartition(epart[i-1] + 1);
|
|
}
|
|
|
|
|
|
|
|
for (int sei = 1; sei <= GetNSE(); sei++ )
|
|
{
|
|
int ei1, ei2;
|
|
GetTopology().GetSurface2VolumeElement (sei, ei1, ei2);
|
|
Element2d & sel = SurfaceElement (sei);
|
|
|
|
for (int j = 0; j < 2; j++)
|
|
{
|
|
int ei = (j == 0) ? ei1 : ei2;
|
|
if ( ei > 0 && ei <= GetNE() )
|
|
{
|
|
sel.SetPartition (VolumeElement(ei).GetPartition());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
#endif
|
|
|
|
|
|
void Mesh :: PartHybridMesh ()
|
|
{
|
|
#ifdef METIS
|
|
int ne = GetNE();
|
|
|
|
int nn = GetNP();
|
|
int nedges = topology->GetNEdges();
|
|
|
|
idxtype *xadj, * adjacency, *v_weights = NULL, *e_weights = NULL;
|
|
|
|
int weightflag = 0;
|
|
int numflag = 0;
|
|
int nparts = ntasks - 1;
|
|
|
|
int options[5];
|
|
options[0] = 0;
|
|
int edgecut;
|
|
idxtype * part;
|
|
|
|
xadj = new idxtype[nn+1];
|
|
part = new idxtype[nn];
|
|
|
|
Array<int> cnt(nn+1);
|
|
cnt = 0;
|
|
|
|
for ( int edge = 1; edge <= nedges; edge++ )
|
|
{
|
|
int v1, v2;
|
|
topology->GetEdgeVertices ( edge, v1, v2);
|
|
cnt[v1-1] ++;
|
|
cnt[v2-1] ++;
|
|
}
|
|
|
|
xadj[0] = 0;
|
|
for ( int n = 1; n <= nn; n++ )
|
|
{
|
|
xadj[n] = idxtype(xadj[n-1] + cnt[n-1]);
|
|
}
|
|
|
|
adjacency = new idxtype[xadj[nn]];
|
|
cnt = 0;
|
|
|
|
for ( int edge = 1; edge <= nedges; edge++ )
|
|
{
|
|
int v1, v2;
|
|
topology->GetEdgeVertices ( edge, v1, v2);
|
|
adjacency[ xadj[v1-1] + cnt[v1-1] ] = v2-1;
|
|
adjacency[ xadj[v2-1] + cnt[v2-1] ] = v1-1;
|
|
cnt[v1-1]++;
|
|
cnt[v2-1]++;
|
|
}
|
|
|
|
for ( int vert = 0; vert < nn; vert++ )
|
|
{
|
|
FlatArray<int> array ( cnt[vert], &adjacency[ xadj[vert] ] );
|
|
BubbleSort(array);
|
|
}
|
|
|
|
#ifdef METIS4
|
|
METIS_PartGraphKway ( &nn, xadj, adjacency, v_weights, e_weights, &weightflag,
|
|
&numflag, &nparts, options, &edgecut, part );
|
|
#else
|
|
cout << "currently not supported (metis5), A" << endl;
|
|
#endif
|
|
|
|
Array<int> nodesinpart(ntasks);
|
|
|
|
for ( int el = 1; el <= ne; el++ )
|
|
{
|
|
Element & volel = VolumeElement(el);
|
|
nodesinpart = 0;
|
|
|
|
// VolumeElement(el).SetPartition(part[ volel[1] ] + 1);
|
|
|
|
int el_np = volel.GetNP();
|
|
int partition = 0;
|
|
for ( int i = 0; i < el_np; i++ )
|
|
nodesinpart[ part[volel[i]-1]+1 ] ++;
|
|
|
|
for ( int i = 1; i < ntasks; i++ )
|
|
if ( nodesinpart[i] > nodesinpart[partition] )
|
|
partition = i;
|
|
|
|
volel.SetPartition(partition);
|
|
|
|
}
|
|
|
|
/*
|
|
for ( int i=1; i<=ne; i++)
|
|
{
|
|
neloc[ VolumeElement(i).GetPartition() ] ++;
|
|
}
|
|
*/
|
|
|
|
delete [] xadj;
|
|
delete [] part;
|
|
delete [] adjacency;
|
|
#else
|
|
cout << "parthybridmesh not available" << endl;
|
|
#endif
|
|
}
|
|
|
|
|
|
void Mesh :: PartDualHybridMesh ( ) // Array<int> & neloc )
|
|
{
|
|
#ifdef METIS
|
|
int ne = GetNE();
|
|
|
|
// int nn = GetNP();
|
|
// int nedges = topology->GetNEdges();
|
|
int nfaces = topology->GetNFaces();
|
|
|
|
idxtype *xadj, * adjacency, *v_weights = NULL, *e_weights = NULL;
|
|
|
|
int weightflag = 0;
|
|
int numflag = 0;
|
|
int nparts = ntasks - 1;
|
|
|
|
int options[5];
|
|
options[0] = 0;
|
|
int edgecut;
|
|
idxtype * part;
|
|
|
|
Array<int, 0> facevolels1(nfaces), facevolels2(nfaces);
|
|
facevolels1 = -1;
|
|
facevolels2 = -1;
|
|
|
|
Array<int, 0> elfaces;
|
|
xadj = new idxtype[ne+1];
|
|
part = new idxtype[ne];
|
|
|
|
Array<int, 0> cnt(ne+1);
|
|
cnt = 0;
|
|
|
|
for ( int el=1; el <= ne; el++ )
|
|
{
|
|
Element volel = VolumeElement(el);
|
|
topology->GetElementFaces(el, elfaces);
|
|
for ( int i = 0; i < elfaces.Size(); i++ )
|
|
{
|
|
if ( facevolels1[elfaces[i]-1] == -1 )
|
|
facevolels1[elfaces[i]-1] = el;
|
|
else
|
|
{
|
|
facevolels2[elfaces[i]-1] = el;
|
|
cnt[facevolels1[elfaces[i]-1]-1]++;
|
|
cnt[facevolels2[elfaces[i]-1]-1]++;
|
|
}
|
|
}
|
|
}
|
|
|
|
xadj[0] = 0;
|
|
for ( int n = 1; n <= ne; n++ )
|
|
{
|
|
xadj[n] = idxtype(xadj[n-1] + cnt[n-1]);
|
|
}
|
|
|
|
adjacency = new idxtype[xadj[ne]];
|
|
cnt = 0;
|
|
|
|
for ( int face = 1; face <= nfaces; face++ )
|
|
{
|
|
int e1, e2;
|
|
e1 = facevolels1[face-1];
|
|
e2 = facevolels2[face-1];
|
|
if ( e2 == -1 ) continue;
|
|
adjacency[ xadj[e1-1] + cnt[e1-1] ] = e2-1;
|
|
adjacency[ xadj[e2-1] + cnt[e2-1] ] = e1-1;
|
|
cnt[e1-1]++;
|
|
cnt[e2-1]++;
|
|
}
|
|
|
|
for ( int el = 0; el < ne; el++ )
|
|
{
|
|
FlatArray<int> array ( cnt[el], &adjacency[ xadj[el] ] );
|
|
BubbleSort(array);
|
|
}
|
|
|
|
int timermetis = NgProfiler::CreateTimer ("Metis itself");
|
|
NgProfiler::StartTimer (timermetis);
|
|
|
|
#ifdef METIS4
|
|
METIS_PartGraphKway ( &ne, xadj, adjacency, v_weights, e_weights, &weightflag,
|
|
&numflag, &nparts, options, &edgecut, part );
|
|
#else
|
|
cout << "currently not supported (metis5), B" << endl;
|
|
#endif
|
|
|
|
|
|
NgProfiler::StopTimer (timermetis);
|
|
|
|
Array<int> nodesinpart(ntasks);
|
|
|
|
for ( int el = 1; el <= ne; el++ )
|
|
{
|
|
// Element & volel = VolumeElement(el);
|
|
nodesinpart = 0;
|
|
|
|
VolumeElement(el).SetPartition(part[el-1 ] + 1);
|
|
|
|
}
|
|
|
|
/*
|
|
for ( int i=1; i<=ne; i++)
|
|
{
|
|
neloc[ VolumeElement(i).GetPartition() ] ++;
|
|
}
|
|
*/
|
|
|
|
delete [] xadj;
|
|
delete [] part;
|
|
delete [] adjacency;
|
|
#else
|
|
cout << "partdualmesh not available" << endl;
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void Mesh :: PartDualHybridMesh2D ( )
|
|
{
|
|
#ifdef METIS
|
|
int ne = GetNSE();
|
|
int nv = GetNV();
|
|
|
|
Array<idxtype> xadj(ne+1);
|
|
Array<idxtype> adjacency(ne*4);
|
|
|
|
// first, build the vertex 2 element table:
|
|
Array<int, PointIndex::BASE> cnt(nv);
|
|
cnt = 0;
|
|
for (SurfaceElementIndex sei = 0; sei < GetNSE(); sei++)
|
|
for (int j = 0; j < (*this)[sei].GetNP(); j++)
|
|
cnt[ (*this)[sei][j] ] ++;
|
|
|
|
TABLE<SurfaceElementIndex, PointIndex::BASE> vert2els(cnt);
|
|
for (SurfaceElementIndex sei = 0; sei < GetNSE(); sei++)
|
|
for (int j = 0; j < (*this)[sei].GetNP(); j++)
|
|
vert2els.Add ((*this)[sei][j], sei);
|
|
|
|
|
|
// find all neighbour elements
|
|
int cntnb = 0;
|
|
Array<int> marks(ne); // to visit each neighbour just once
|
|
marks = -1;
|
|
for (SurfaceElementIndex sei = 0; sei < ne; sei++)
|
|
{
|
|
xadj[sei] = cntnb;
|
|
for (int j = 0; j < (*this)[sei].GetNP(); j++)
|
|
{
|
|
PointIndex vnr = (*this)[sei][j];
|
|
|
|
// all elements with at least one common vertex
|
|
for (int k = 0; k < vert2els[vnr].Size(); k++)
|
|
{
|
|
SurfaceElementIndex sei2 = vert2els[vnr][k];
|
|
if (sei == sei2) continue;
|
|
if (marks[sei2] == sei) continue;
|
|
|
|
// neighbour, if two common vertices
|
|
int common = 0;
|
|
for (int m1 = 0; m1 < (*this)[sei].GetNP(); m1++)
|
|
for (int m2 = 0; m2 < (*this)[sei2].GetNP(); m2++)
|
|
if ( (*this)[sei][m1] == (*this)[sei2][m2])
|
|
common++;
|
|
|
|
if (common >= 2)
|
|
{
|
|
marks[sei2] = sei; // mark as visited
|
|
adjacency[cntnb++] = sei2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
xadj[ne] = cntnb;
|
|
|
|
idxtype *v_weights = NULL, *e_weights = NULL;
|
|
|
|
int weightflag = 0;
|
|
int numflag = 0;
|
|
int nparts = ntasks - 1;
|
|
|
|
int options[5];
|
|
options[0] = 0;
|
|
int edgecut;
|
|
Array<idxtype> part(ne);
|
|
|
|
for ( int el = 0; el < ne; el++ )
|
|
BubbleSort (adjacency.Range (xadj[el], xadj[el+1]));
|
|
|
|
#ifdef METIS4
|
|
METIS_PartGraphKway ( &ne, &xadj[0], &adjacency[0], v_weights, e_weights, &weightflag,
|
|
&numflag, &nparts, options, &edgecut, &part[0] );
|
|
#else
|
|
idx_t ncon = 1;
|
|
METIS_PartGraphKway ( &ne, &ncon, &xadj[0], &adjacency[0],
|
|
v_weights, NULL, e_weights,
|
|
&nparts,
|
|
NULL, NULL, NULL,
|
|
&edgecut, &part[0] );
|
|
#endif
|
|
|
|
|
|
for (SurfaceElementIndex sei = 0; sei < ne; sei++)
|
|
(*this) [sei].SetPartition (part[sei]+1);
|
|
#else
|
|
cout << "partdualmesh not available" << endl;
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
void Mesh :: UpdateOverlap()
|
|
{
|
|
cout << "UpdateOverlap depreciated" << endl;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|