mirror of
https://github.com/NGSolve/netgen.git
synced 2024-09-22 17:52:50 +05:00
419 lines
11 KiB
C++
419 lines
11 KiB
C++
#ifndef FILE_PARALLEL
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#define FILE_PARALLEL
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#ifdef VTRACE
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#include "vt_user.h"
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#else
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#define VT_USER_START(n)
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#define VT_USER_END(n)
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#define VT_TRACER(n)
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#endif
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namespace netgen
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{
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using ngcore::id;
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using ngcore::ntasks;
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#ifndef PARALLEL
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/** without MPI, we need a dummy typedef **/
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// typedef int MPI_Comm;
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#endif
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/** This is the "standard" communicator that will be used for netgen-objects. **/
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extern DLL_HEADER NgMPI_Comm ng_comm;
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#ifdef PARALLEL
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inline int MyMPI_GetNTasks (MPI_Comm comm = ng_comm)
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{
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int ntasks;
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MPI_Comm_size(comm, &ntasks);
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return ntasks;
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}
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inline int MyMPI_GetId (MPI_Comm comm = ng_comm)
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{
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int id;
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MPI_Comm_rank(comm, &id);
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return id;
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}
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#else
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// enum { MPI_COMM_WORLD = 12345, MPI_COMM_NULL = 0};
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extern MPI_Comm MPI_COMM_WORLD, MPI_COMM_NULL;
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inline int MyMPI_GetNTasks (MPI_Comm comm = ng_comm) { return 1; }
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inline int MyMPI_GetId (MPI_Comm comm = ng_comm) { return 0; }
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#endif
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/*
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#ifdef PARALLEL
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// For python wrapping of communicators
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struct PyMPI_Comm {
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MPI_Comm comm;
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bool owns_comm;
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PyMPI_Comm (MPI_Comm _comm, bool _owns_comm = false) : comm(_comm), owns_comm(_owns_comm) { }
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PyMPI_Comm (const PyMPI_Comm & c) = delete;
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~PyMPI_Comm () {
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if (owns_comm)
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MPI_Comm_free(&comm);
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}
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inline int Rank() const { return MyMPI_GetId(comm); }
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inline int Size() const { return MyMPI_GetNTasks(comm); }
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};
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#else
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// dummy without MPI
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struct PyMPI_Comm {
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MPI_Comm comm = 0;
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PyMPI_Comm (MPI_Comm _comm, bool _owns_comm = false) { }
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~PyMPI_Comm () { }
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inline int Rank() const { return 0; }
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inline int Size() const { return 1; }
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};
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#endif
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*/
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#ifdef PARALLEL
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template <class T>
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inline MPI_Datatype MyGetMPIType ( )
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{ cerr << "ERROR in GetMPIType() -- no type found" << endl;return 0; }
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template <>
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inline MPI_Datatype MyGetMPIType<int> ( )
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{ return MPI_INT; }
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template <>
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inline MPI_Datatype MyGetMPIType<double> ( )
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{ return MPI_DOUBLE; }
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template <>
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inline MPI_Datatype MyGetMPIType<char> ( )
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{ return MPI_CHAR; }
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template<>
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inline MPI_Datatype MyGetMPIType<size_t> ( )
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{ return MPI_UINT64_T; }
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#else
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typedef int MPI_Datatype;
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template <class T> inline MPI_Datatype MyGetMPIType ( ) { return 0; }
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#endif
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#ifdef PARALLEL
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inline MPI_Comm MyMPI_SubCommunicator(MPI_Comm comm, Array<int> & procs)
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{
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MPI_Comm subcomm;
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MPI_Group gcomm, gsubcomm;
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MPI_Comm_group(comm, &gcomm);
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MPI_Group_incl(gcomm, procs.Size(), &(procs[0]), &gsubcomm);
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MPI_Comm_create_group(comm, gsubcomm, 6969, &subcomm);
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return subcomm;
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}
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#else
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inline MPI_Comm MyMPI_SubCommunicator(MPI_Comm comm, Array<int> & procs)
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{ return comm; }
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#endif
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#ifdef PARALLEL
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enum { MPI_TAG_CMD = 110 };
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enum { MPI_TAG_MESH = 210 };
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enum { MPI_TAG_VIS = 310 };
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inline void MyMPI_Send (int i, int dest, int tag, MPI_Comm comm = ng_comm)
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{
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int hi = i;
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MPI_Send( &hi, 1, MPI_INT, dest, tag, comm);
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}
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inline void MyMPI_Recv (int & i, int src, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Status status;
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MPI_Recv( &i, 1, MPI_INT, src, tag, comm, &status);
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}
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inline void MyMPI_Send (const string & s, int dest, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Send( const_cast<char*> (s.c_str()), s.length(), MPI_CHAR, dest, tag, comm);
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}
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inline void MyMPI_Recv (string & s, int src, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Status status;
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int len;
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MPI_Probe (src, tag, MPI_COMM_WORLD, &status);
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MPI_Get_count (&status, MPI_CHAR, &len);
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s.assign (len, ' ');
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MPI_Recv( &s[0], len, MPI_CHAR, src, tag, comm, &status);
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}
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template <class T, int BASE>
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inline void MyMPI_Send (FlatArray<T, BASE> s, int dest, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Send( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, comm);
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}
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template <class T, int BASE>
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inline void MyMPI_Recv ( FlatArray<T, BASE> s, int src, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Status status;
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MPI_Recv( &s.First(), s.Size(), MyGetMPIType<T>(), src, tag, comm, &status);
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}
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template <class T, int BASE>
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inline void MyMPI_Recv ( Array <T, BASE> & s, int src, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Status status;
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int len;
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MPI_Probe (src, tag, comm, &status);
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MPI_Get_count (&status, MyGetMPIType<T>(), &len);
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s.SetSize (len);
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MPI_Recv( &s.First(), len, MyGetMPIType<T>(), src, tag, comm, &status);
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}
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template <class T, int BASE>
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inline int MyMPI_Recv ( Array <T, BASE> & s, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Status status;
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int len;
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MPI_Probe (MPI_ANY_SOURCE, tag, comm, &status);
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int src = status.MPI_SOURCE;
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MPI_Get_count (&status, MyGetMPIType<T>(), &len);
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s.SetSize (len);
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MPI_Recv( &s.First(), len, MyGetMPIType<T>(), src, tag, comm, &status);
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return src;
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}
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/*
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template <class T, int BASE>
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inline void MyMPI_ISend (FlatArray<T, BASE> s, int dest, int tag, MPI_Request & request)
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{
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MPI_Isend( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, MPI_COMM_WORLD, & request);
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}
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template <class T, int BASE>
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inline void MyMPI_IRecv (FlatArray<T, BASE> s, int dest, int tag, MPI_Request & request)
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{
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MPI_Irecv( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, MPI_COMM_WORLD, & request);
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}
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*/
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template <class T, int BASE>
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inline MPI_Request MyMPI_ISend (FlatArray<T, BASE> s, int dest, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Request request;
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MPI_Isend( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, comm, &request);
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return request;
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}
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template <class T, int BASE>
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inline MPI_Request MyMPI_IRecv (FlatArray<T, BASE> s, int dest, int tag, MPI_Comm comm = ng_comm)
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{
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MPI_Request request;
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MPI_Irecv( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, comm, &request);
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return request;
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}
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/*
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template <class T, int BASE>
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inline void MyMPI_ISend (FlatArray<T, BASE> s, int dest, int tag)
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{
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MPI_Request request;
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MPI_Isend( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, MPI_COMM_WORLD, &request);
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MPI_Request_free (&request);
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}
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template <class T, int BASE>
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inline void MyMPI_IRecv (FlatArray<T, BASE> s, int dest, int tag)
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{
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MPI_Request request;
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MPI_Irecv( &s.First(), s.Size(), MyGetMPIType<T>(), dest, tag, MPI_COMM_WORLD, &request);
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MPI_Request_free (&request);
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}
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*/
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/*
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send a table entry to each of the processes in the group ...
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receive-table entries will be set
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*/
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/*
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template <typename T>
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inline void MyMPI_ExchangeTable (TABLE<T> & send_data,
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TABLE<T> & recv_data, int tag,
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MPI_Comm comm = MPI_COMM_WORLD)
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{
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int ntasks, rank;
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MPI_Comm_size(comm, &ntasks);
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MPI_Comm_rank(comm, &rank);
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Array<MPI_Request> requests;
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for (int dest = 0; dest < ntasks; dest++)
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if (dest != rank)
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requests.Append (MyMPI_ISend (send_data[dest], dest, tag, comm));
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for (int i = 0; i < ntasks-1; i++)
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{
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MPI_Status status;
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MPI_Probe (MPI_ANY_SOURCE, tag, comm, &status);
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int size, src = status.MPI_SOURCE;
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MPI_Get_count (&status, MPI_INT, &size);
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recv_data.SetEntrySize (src, size, sizeof(T));
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requests.Append (MyMPI_IRecv (recv_data[src], src, tag, comm));
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}
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MPI_Barrier (comm);
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MPI_Waitall (requests.Size(), &requests[0], MPI_STATUS_IGNORE);
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}
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*/
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template <typename T>
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inline void MyMPI_ExchangeTable (TABLE<T> & send_data,
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TABLE<T> & recv_data, int tag,
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MPI_Comm comm = ng_comm)
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{
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int rank = MyMPI_GetId(comm);
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int ntasks = MyMPI_GetNTasks(comm);
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Array<int> send_sizes(ntasks);
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Array<int> recv_sizes(ntasks);
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for (int i = 0; i < ntasks; i++)
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send_sizes[i] = send_data[i].Size();
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MPI_Alltoall (&send_sizes[0], 1, MPI_INT,
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&recv_sizes[0], 1, MPI_INT, comm);
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// in-place is buggy !
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// MPI_Alltoall (MPI_IN_PLACE, 1, MPI_INT,
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// &recv_sizes[0], 1, MPI_INT, comm);
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for (int i = 0; i < ntasks; i++)
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recv_data.SetEntrySize (i, recv_sizes[i], sizeof(T));
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Array<MPI_Request> requests;
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for (int dest = 0; dest < ntasks; dest++)
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if (dest != rank && send_data[dest].Size())
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requests.Append (MyMPI_ISend (send_data[dest], dest, tag, comm));
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for (int dest = 0; dest < ntasks; dest++)
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if (dest != rank && recv_data[dest].Size())
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requests.Append (MyMPI_IRecv (recv_data[dest], dest, tag, comm));
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// MPI_Barrier (comm);
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MPI_Waitall (requests.Size(), &requests[0], MPI_STATUS_IGNORE);
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}
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extern void MyMPI_SendCmd (const char * cmd);
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extern string MyMPI_RecvCmd ();
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template <class T>
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inline void MyMPI_Bcast (T & s, MPI_Comm comm = ng_comm)
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{
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MPI_Bcast (&s, 1, MyGetMPIType<T>(), 0, comm);
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}
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template <class T>
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inline void MyMPI_Bcast (Array<T, 0> & s, MPI_Comm comm = ng_comm)
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{
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int size = s.Size();
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MyMPI_Bcast (size, comm);
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if (MyMPI_GetId(comm) != 0) s.SetSize (size);
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MPI_Bcast (&s[0], size, MyGetMPIType<T>(), 0, comm);
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}
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template <class T>
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inline void MyMPI_Bcast (Array<T, 0> & s, int root, MPI_Comm comm = ng_comm)
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{
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int id;
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MPI_Comm_rank(comm, &id);
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int size = s.Size();
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MPI_Bcast (&size, 1, MPI_INT, root, comm);
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if (id != root) s.SetSize (size);
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if ( !size ) return;
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MPI_Bcast (&s[0], size, MyGetMPIType<T>(), root, comm);
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}
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template <class T, class T2>
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inline void MyMPI_Allgather (const T & send, FlatArray<T2> recv, MPI_Comm comm = ng_comm)
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{
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MPI_Allgather( const_cast<T*> (&send), 1, MyGetMPIType<T>(), &recv[0], 1, MyGetMPIType<T2>(), comm);
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}
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template <class T, class T2>
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inline void MyMPI_Alltoall (FlatArray<T> send, FlatArray<T2> recv, MPI_Comm comm = ng_comm)
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{
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MPI_Alltoall( &send[0], 1, MyGetMPIType<T>(), &recv[0], 1, MyGetMPIType<T2>(), comm);
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}
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// template <class T, class T2>
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// inline void MyMPI_Alltoall_Block (FlatArray<T> send, FlatArray<T2> recv, int blocklen, MPI_Comm comm = ng_comm)
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// {
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// MPI_Alltoall( &send[0], blocklen, MyGetMPIType<T>(), &recv[0], blocklen, MyGetMPIType<T2>(), comm);
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// }
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/*
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inline void MyMPI_Send ( int *& s, int len, int dest, int tag)
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{
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int hlen = len;
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MPI_Send( &hlen, 1, MPI_INT, dest, tag, MPI_COMM_WORLD);
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MPI_Send( s, len, MPI_INT, dest, tag, MPI_COMM_WORLD);
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}
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inline void MyMPI_Recv ( int *& s, int & len, int src, int tag)
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{
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MPI_Status status;
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MPI_Recv( &len, 1, MPI_INT, src, tag, MPI_COMM_WORLD, &status);
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if ( s )
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delete [] s;
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s = new int [len];
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MPI_Recv( s, len, MPI_INT, src, tag, MPI_COMM_WORLD, &status);
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}
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inline void MyMPI_Send ( double * s, int len, int dest, int tag)
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{
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MPI_Send( &len, 1, MPI_INT, dest, tag, MPI_COMM_WORLD);
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MPI_Send( s, len, MPI_DOUBLE, dest, tag, MPI_COMM_WORLD);
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}
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inline void MyMPI_Recv ( double *& s, int & len, int src, int tag)
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{
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MPI_Status status;
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MPI_Recv( &len, 1, MPI_INT, src, tag, MPI_COMM_WORLD, &status);
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if ( s )
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delete [] s;
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s = new double [len];
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MPI_Recv( s, len, MPI_DOUBLE, src, tag, MPI_COMM_WORLD, &status);
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}
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*/
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#endif // PARALLEL
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}
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#endif
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