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https://github.com/NGSolve/netgen.git
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634 lines
17 KiB
C++
634 lines
17 KiB
C++
#ifndef NGCORE_MPIWRAPPER_HPP
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#define NGCORE_MPIWRAPPER_HPP
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#include <array>
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#include <complex>
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#include "array.hpp"
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#include "table.hpp"
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#include "exception.hpp"
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#include "profiler.hpp"
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#include "ngstream.hpp"
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#include "ng_mpi.hpp"
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namespace ngcore
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{
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#ifdef PARALLEL
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template <class T> struct MPI_typetrait { };
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template <> struct MPI_typetrait<int> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_INT; } };
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template <> struct MPI_typetrait<short> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_SHORT; } };
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template <> struct MPI_typetrait<char> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_CHAR; } };
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template <> struct MPI_typetrait<signed char> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_CHAR; } };
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template <> struct MPI_typetrait<unsigned char> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_CHAR; } };
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template <> struct MPI_typetrait<size_t> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_UINT64_T; } };
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template <> struct MPI_typetrait<double> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_DOUBLE; } };
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template <> struct MPI_typetrait<std::complex<double>> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_CXX_DOUBLE_COMPLEX; } };
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template <> struct MPI_typetrait<bool> {
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static NG_MPI_Datatype MPIType () { return NG_MPI_C_BOOL; } };
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template<typename T, size_t S>
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struct MPI_typetrait<std::array<T,S>>
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{
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static NG_MPI_Datatype MPIType ()
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{
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static NG_MPI_Datatype NG_MPI_T = 0;
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if (!NG_MPI_T)
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{
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NG_MPI_Type_contiguous ( S, MPI_typetrait<T>::MPIType(), &NG_MPI_T);
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NG_MPI_Type_commit ( &NG_MPI_T );
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}
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return NG_MPI_T;
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}
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};
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template <class T, class T2 = decltype(MPI_typetrait<T>::MPIType())>
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inline NG_MPI_Datatype GetMPIType () {
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return MPI_typetrait<T>::MPIType();
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}
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template <class T>
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inline NG_MPI_Datatype GetMPIType (T &) {
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return GetMPIType<T>();
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}
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class NgMPI_Request
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{
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NG_MPI_Request request;
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public:
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NgMPI_Request (NG_MPI_Request requ) : request{requ} { }
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NgMPI_Request (const NgMPI_Request&) = delete;
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NgMPI_Request (NgMPI_Request&&) = default;
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~NgMPI_Request () { NG_MPI_Wait (&request, NG_MPI_STATUS_IGNORE); }
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void Wait() { NG_MPI_Wait (&request, NG_MPI_STATUS_IGNORE); }
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operator NG_MPI_Request() &&
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{
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auto tmp = request;
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request = NG_MPI_REQUEST_NULL;
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return tmp;
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}
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};
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class NgMPI_Requests
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{
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Array<NG_MPI_Request> requests;
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public:
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NgMPI_Requests() = default;
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~NgMPI_Requests() { WaitAll(); }
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NgMPI_Requests & operator+= (NgMPI_Request && r)
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{
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requests += NG_MPI_Request(std::move(r));
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return *this;
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}
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NgMPI_Requests & operator+= (NG_MPI_Request r)
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{
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requests += r;
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return *this;
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}
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void WaitAll()
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{
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static Timer t("NgMPI - WaitAll"); RegionTimer reg(t);
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if (!requests.Size()) return;
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NG_MPI_Waitall (requests.Size(), requests.Data(), NG_MPI_STATUSES_IGNORE);
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}
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int WaitAny ()
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{
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int nr;
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NG_MPI_Waitany (requests.Size(), requests.Data(), &nr, NG_MPI_STATUS_IGNORE);
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return nr;
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}
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};
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inline void MyMPI_WaitAll (FlatArray<NG_MPI_Request> requests)
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{
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static Timer t("MPI - WaitAll"); RegionTimer reg(t);
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if (!requests.Size()) return;
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NG_MPI_Waitall (requests.Size(), requests.Data(), NG_MPI_STATUSES_IGNORE);
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}
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inline int MyMPI_WaitAny (FlatArray<NG_MPI_Request> requests)
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{
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int nr;
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NG_MPI_Waitany (requests.Size(), requests.Data(), &nr, NG_MPI_STATUS_IGNORE);
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return nr;
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}
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class NgMPI_Comm
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{
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protected:
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NG_MPI_Comm comm;
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bool valid_comm;
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int * refcount;
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int rank, size;
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public:
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NgMPI_Comm ()
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: valid_comm(false), refcount(nullptr), rank(0), size(1)
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{ ; }
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NgMPI_Comm (NG_MPI_Comm _comm, bool owns = false)
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: comm(_comm), valid_comm(true)
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{
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int flag;
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NG_MPI_Initialized (&flag);
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if (!flag)
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{
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valid_comm = false;
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refcount = nullptr;
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rank = 0;
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size = 1;
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return;
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}
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if (!owns)
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refcount = nullptr;
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else
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refcount = new int{1};
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NG_MPI_Comm_rank(comm, &rank);
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NG_MPI_Comm_size(comm, &size);
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}
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NgMPI_Comm (const NgMPI_Comm & c)
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: comm(c.comm), valid_comm(c.valid_comm), refcount(c.refcount),
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rank(c.rank), size(c.size)
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{
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if (refcount) (*refcount)++;
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}
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NgMPI_Comm (NgMPI_Comm && c)
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: comm(c.comm), valid_comm(c.valid_comm), refcount(c.refcount),
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rank(c.rank), size(c.size)
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{
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c.refcount = nullptr;
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}
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~NgMPI_Comm()
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{
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if (refcount)
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if (--(*refcount) == 0)
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NG_MPI_Comm_free(&comm);
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}
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bool ValidCommunicator() const
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{
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return valid_comm;
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}
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NgMPI_Comm & operator= (const NgMPI_Comm & c)
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{
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if (refcount)
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if (--(*refcount) == 0)
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NG_MPI_Comm_free(&comm);
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refcount = c.refcount;
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if (refcount) (*refcount)++;
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comm = c.comm;
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valid_comm = c.valid_comm;
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size = c.size;
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rank = c.rank;
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return *this;
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}
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class InvalidCommException : public Exception {
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public:
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InvalidCommException() : Exception("Do not have a valid communicator") { ; }
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};
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operator NG_MPI_Comm() const {
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if (!valid_comm) throw InvalidCommException();
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return comm;
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}
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int Rank() const { return rank; }
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int Size() const { return size; }
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void Barrier() const {
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static Timer t("MPI - Barrier"); RegionTimer reg(t);
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if (size > 1) NG_MPI_Barrier (comm);
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}
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/** --- blocking P2P --- **/
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template<typename T, typename T2 = decltype(GetMPIType<T>())>
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void Send (T & val, int dest, int tag) const {
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NG_MPI_Send (&val, 1, GetMPIType<T>(), dest, tag, comm);
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}
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void Send (const std::string & s, int dest, int tag) const {
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NG_MPI_Send( const_cast<char*> (&s[0]), s.length(), NG_MPI_CHAR, dest, tag, comm);
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}
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template<typename T, typename TI, typename T2 = decltype(GetMPIType<T>())>
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void Send(FlatArray<T,TI> s, int dest, int tag) const {
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NG_MPI_Send (s.Data(), s.Size(), GetMPIType<T>(), dest, tag, comm);
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}
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template<typename T, typename T2 = decltype(GetMPIType<T>())>
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void Recv (T & val, int src, int tag) const {
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NG_MPI_Recv (&val, 1, GetMPIType<T>(), src, tag, comm, NG_MPI_STATUS_IGNORE);
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}
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void Recv (std::string & s, int src, int tag) const {
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NG_MPI_Status status;
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int len;
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NG_MPI_Probe (src, tag, comm, &status);
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NG_MPI_Get_count (&status, NG_MPI_CHAR, &len);
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// s.assign (len, ' ');
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s.resize (len);
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NG_MPI_Recv( &s[0], len, NG_MPI_CHAR, src, tag, comm, NG_MPI_STATUS_IGNORE);
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}
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template <typename T, typename TI, typename T2 = decltype(GetMPIType<T>())>
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void Recv (FlatArray <T,TI> s, int src, int tag) const {
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NG_MPI_Recv (s.Data(), s.Size(), GetMPIType<T> (), src, tag, comm, NG_MPI_STATUS_IGNORE);
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}
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template <typename T, typename TI, typename T2 = decltype(GetMPIType<T>())>
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void Recv (Array <T,TI> & s, int src, int tag) const
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{
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NG_MPI_Status status;
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int len;
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const NG_MPI_Datatype NG_MPI_T = GetMPIType<T> ();
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NG_MPI_Probe (src, tag, comm, &status);
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NG_MPI_Get_count (&status, NG_MPI_T, &len);
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s.SetSize (len);
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NG_MPI_Recv (s.Data(), len, NG_MPI_T, src, tag, comm, NG_MPI_STATUS_IGNORE);
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}
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/** --- non-blocking P2P --- **/
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template<typename T, typename T2 = decltype(GetMPIType<T>())>
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NG_MPI_Request ISend (T & val, int dest, int tag) const
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{
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NG_MPI_Request request;
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NG_MPI_Isend (&val, 1, GetMPIType<T>(), dest, tag, comm, &request);
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return request;
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}
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template<typename T, typename T2 = decltype(GetMPIType<T>())>
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NG_MPI_Request ISend (FlatArray<T> s, int dest, int tag) const
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{
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NG_MPI_Request request;
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NG_MPI_Isend (s.Data(), s.Size(), GetMPIType<T>(), dest, tag, comm, &request);
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return request;
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}
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template<typename T, typename T2 = decltype(GetMPIType<T>())>
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NG_MPI_Request IRecv (T & val, int dest, int tag) const
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{
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NG_MPI_Request request;
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NG_MPI_Irecv (&val, 1, GetMPIType<T>(), dest, tag, comm, &request);
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return request;
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}
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template<typename T, typename T2 = decltype(GetMPIType<T>())>
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NG_MPI_Request IRecv (FlatArray<T> s, int src, int tag) const
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{
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NG_MPI_Request request;
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NG_MPI_Irecv (s.Data(), s.Size(), GetMPIType<T>(), src, tag, comm, &request);
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return request;
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}
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/** --- collectives --- **/
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template <typename T, typename T2 = decltype(GetMPIType<T>())>
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T Reduce (T d, const NG_MPI_Op & op, int root = 0) const
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{
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static Timer t("MPI - Reduce"); RegionTimer reg(t);
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if (size == 1) return d;
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T global_d;
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NG_MPI_Reduce (&d, &global_d, 1, GetMPIType<T>(), op, root, comm);
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return global_d;
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}
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template <typename T, typename T2 = decltype(GetMPIType<T>())>
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T AllReduce (T d, const NG_MPI_Op & op) const
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{
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static Timer t("MPI - AllReduce"); RegionTimer reg(t);
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if (size == 1) return d;
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T global_d;
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NG_MPI_Allreduce ( &d, &global_d, 1, GetMPIType<T>(), op, comm);
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return global_d;
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}
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template <typename T, typename T2 = decltype(GetMPIType<T>())>
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void AllReduce (FlatArray<T> d, const NG_MPI_Op & op) const
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{
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static Timer t("MPI - AllReduce Array"); RegionTimer reg(t);
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if (size == 1) return;
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NG_MPI_Allreduce (NG_MPI_IN_PLACE, d.Data(), d.Size(), GetMPIType<T>(), op, comm);
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}
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template <typename T, typename T2 = decltype(GetMPIType<T>())>
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void Bcast (T & s, int root = 0) const {
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if (size == 1) return;
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static Timer t("MPI - Bcast"); RegionTimer reg(t);
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NG_MPI_Bcast (&s, 1, GetMPIType<T>(), root, comm);
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}
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template <class T, size_t S>
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void Bcast (std::array<T,S> & d, int root = 0) const
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{
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if (size == 1) return;
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if (S != 0)
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NG_MPI_Bcast (&d[0], S, GetMPIType<T>(), root, comm);
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}
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template <class T>
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void Bcast (Array<T> & d, int root = 0) const
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{
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if (size == 1) return;
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int ds = d.Size();
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Bcast (ds, root);
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if (Rank() != root) d.SetSize (ds);
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if (ds != 0)
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NG_MPI_Bcast (d.Data(), ds, GetMPIType<T>(), root, comm);
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}
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void Bcast (std::string & s, int root = 0) const
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{
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if (size == 1) return;
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int len = s.length();
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Bcast (len, root);
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if (rank != 0) s.resize (len);
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NG_MPI_Bcast (&s[0], len, NG_MPI_CHAR, root, comm);
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}
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template <class T, size_t S>
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NgMPI_Request IBcast (std::array<T,S> & d, int root = 0) const
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{
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NG_MPI_Request request;
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NG_MPI_Ibcast (&d[0], S, GetMPIType<T>(), root, comm, &request);
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return request;
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}
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template <class T>
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NgMPI_Request IBcast (FlatArray<T> d, int root = 0) const
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{
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NG_MPI_Request request;
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int ds = d.Size();
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NG_MPI_Ibcast (d.Data(), ds, GetMPIType<T>(), root, comm, &request);
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return request;
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}
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template <typename T>
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void AllToAll (FlatArray<T> send, FlatArray<T> recv) const
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{
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NG_MPI_Alltoall (send.Data(), 1, GetMPIType<T>(),
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recv.Data(), 1, GetMPIType<T>(), comm);
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}
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template <typename T>
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void ScatterRoot (FlatArray<T> send) const
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{
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if (size == 1) return;
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NG_MPI_Scatter (send.Data(), 1, GetMPIType<T>(),
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NG_MPI_IN_PLACE, -1, GetMPIType<T>(), 0, comm);
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}
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template <typename T>
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void Scatter (T & recv) const
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{
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if (size == 1) return;
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NG_MPI_Scatter (NULL, 0, GetMPIType<T>(),
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&recv, 1, GetMPIType<T>(), 0, comm);
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}
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template <typename T>
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void GatherRoot (FlatArray<T> recv) const
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{
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recv[0] = T(0);
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if (size == 1) return;
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NG_MPI_Gather (NG_MPI_IN_PLACE, 1, GetMPIType<T>(),
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recv.Data(), 1, GetMPIType<T>(), 0, comm);
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}
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template <typename T>
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void Gather (T send) const
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{
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if (size == 1) return;
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NG_MPI_Gather (&send, 1, GetMPIType<T>(),
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NULL, 1, GetMPIType<T>(), 0, comm);
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}
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template <typename T>
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void AllGather (T val, FlatArray<T> recv) const
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{
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if (size == 1)
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{
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recv[0] = val;
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return;
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}
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NG_MPI_Allgather (&val, 1, GetMPIType<T>(),
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recv.Data(), 1, GetMPIType<T>(),
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comm);
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}
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template <typename T>
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void ExchangeTable (DynamicTable<T> & send_data,
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DynamicTable<T> & recv_data, int tag)
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{
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Array<int> send_sizes(size);
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Array<int> recv_sizes(size);
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for (int i = 0; i < size; i++)
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send_sizes[i] = send_data[i].Size();
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AllToAll (send_sizes, recv_sizes);
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recv_data = DynamicTable<T> (recv_sizes, true);
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Array<NG_MPI_Request> requests;
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for (int dest = 0; dest < size; dest++)
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if (dest != rank && send_data[dest].Size())
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requests.Append (ISend (FlatArray<T>(send_data[dest]), dest, tag));
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for (int dest = 0; dest < size; dest++)
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if (dest != rank && recv_data[dest].Size())
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requests.Append (IRecv (FlatArray<T>(recv_data[dest]), dest, tag));
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MyMPI_WaitAll (requests);
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}
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NgMPI_Comm SubCommunicator (FlatArray<int> procs) const
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{
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NG_MPI_Comm subcomm;
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NG_MPI_Group gcomm, gsubcomm;
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NG_MPI_Comm_group(comm, &gcomm);
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NG_MPI_Group_incl(gcomm, procs.Size(), procs.Data(), &gsubcomm);
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NG_MPI_Comm_create_group(comm, gsubcomm, 4242, &subcomm);
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return NgMPI_Comm(subcomm, true);
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}
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}; // class NgMPI_Comm
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#else // PARALLEL
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class NG_MPI_Comm {
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int nr;
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public:
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NG_MPI_Comm (int _nr = 0) : nr(_nr) { ; }
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operator int() const { return nr; }
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bool operator== (NG_MPI_Comm c2) const { return nr == c2.nr; }
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};
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static NG_MPI_Comm NG_MPI_COMM_WORLD = 12345, NG_MPI_COMM_NULL = 10000;
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typedef int NG_MPI_Op;
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typedef int NG_MPI_Datatype;
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typedef int NG_MPI_Request;
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enum { NG_MPI_SUM = 0, NG_MPI_MIN = 1, NG_MPI_MAX = 2, NG_MPI_LOR = 4711 };
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|
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inline void NG_MPI_Type_contiguous ( int, NG_MPI_Datatype, NG_MPI_Datatype*) { ; }
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inline void NG_MPI_Type_commit ( NG_MPI_Datatype * ) { ; }
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|
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template <class T> struct MPI_typetrait {
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static NG_MPI_Datatype MPIType () { return -1; }
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};
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template <class T, class T2=void>
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inline NG_MPI_Datatype GetMPIType () { return -1; }
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|
|
|
class NgMPI_Request { };
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|
class NgMPI_Requests
|
|
{
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public:
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|
NgMPI_Requests & operator+= (NgMPI_Request &&) { return *this; }
|
|
NgMPI_Requests & operator+= (NG_MPI_Request r) { return *this; }
|
|
void WaitAll() { ; }
|
|
int WaitAny() { return 0; }
|
|
};
|
|
|
|
class NgMPI_Comm
|
|
{
|
|
|
|
public:
|
|
NgMPI_Comm () { ; }
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|
NgMPI_Comm (NG_MPI_Comm _comm, bool owns = false) { ; }
|
|
|
|
size_t Rank() const { return 0; }
|
|
size_t Size() const { return 1; }
|
|
bool ValidCommunicator() const { return false; }
|
|
void Barrier() const { ; }
|
|
operator NG_MPI_Comm() const { return NG_MPI_Comm(); }
|
|
|
|
template<typename T>
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|
void Send( T & val, int dest, int tag) const { ; }
|
|
|
|
template<typename T>
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|
void Send(FlatArray<T> s, int dest, int tag) const { ; }
|
|
|
|
template<typename T>
|
|
void Recv (T & val, int src, int tag) const { ; }
|
|
|
|
template <typename T>
|
|
void Recv (FlatArray <T> s, int src, int tag) const { ; }
|
|
|
|
template <typename T>
|
|
void Recv (Array <T> & s, int src, int tag) const { ; }
|
|
|
|
template<typename T>
|
|
NG_MPI_Request ISend (T & val, int dest, int tag) const { return 0; }
|
|
|
|
template<typename T>
|
|
NG_MPI_Request ISend (FlatArray<T> s, int dest, int tag) const { return 0; }
|
|
|
|
template<typename T>
|
|
NG_MPI_Request IRecv (T & val, int dest, int tag) const { return 0; }
|
|
|
|
template<typename T>
|
|
NG_MPI_Request IRecv (FlatArray<T> s, int src, int tag) const { return 0; }
|
|
|
|
template <typename T>
|
|
T Reduce (T d, const NG_MPI_Op & op, int root = 0) const { return d; }
|
|
|
|
template <typename T>
|
|
T AllReduce (T d, const NG_MPI_Op & op) const { return d; }
|
|
|
|
template <typename T>
|
|
void AllReduce (FlatArray<T> d, const NG_MPI_Op & op) const { ; }
|
|
|
|
template <typename T>
|
|
void Bcast (T & s, int root = 0) const { ; }
|
|
|
|
template <class T, size_t S>
|
|
void Bcast (std::array<T,S> & d, int root = 0) const {}
|
|
|
|
template <class T>
|
|
void Bcast (Array<T> & d, int root = 0) const { ; }
|
|
|
|
template <class T, size_t S>
|
|
NG_MPI_Request IBcast (std::array<T,S> & d, int root = 0) const { return 0; }
|
|
|
|
template <class T>
|
|
NG_MPI_Request IBcast (FlatArray<T> d, int root = 0) const { return 0; }
|
|
|
|
template <typename T>
|
|
void AllGather (T val, FlatArray<T> recv) const
|
|
{
|
|
recv[0] = val;
|
|
}
|
|
|
|
template <typename T>
|
|
void ExchangeTable (DynamicTable<T> & send_data,
|
|
DynamicTable<T> & recv_data, int tag) { ; }
|
|
|
|
|
|
NgMPI_Comm SubCommunicator (FlatArray<int> procs) const
|
|
{ return *this; }
|
|
};
|
|
|
|
inline void MyMPI_WaitAll (FlatArray<NG_MPI_Request> requests) { ; }
|
|
inline int MyMPI_WaitAny (FlatArray<NG_MPI_Request> requests) { return 0; }
|
|
|
|
#endif // PARALLEL
|
|
|
|
} // namespace ngcore
|
|
|
|
#endif // NGCORE_MPIWRAPPER_HPP
|
|
|