mirror of
https://github.com/NGSolve/netgen.git
synced 2024-09-23 02:02:49 +05:00
444 lines
12 KiB
C++
444 lines
12 KiB
C++
#ifndef NGCORE_MPIWRAPPER_HPP
|
|
#define NGCORE_MPIWRAPPER_HPP
|
|
|
|
#ifdef PARALLEL
|
|
#define OMPI_SKIP_MPICXX
|
|
#include <mpi.h>
|
|
#endif
|
|
|
|
#include "array.hpp"
|
|
#include "exception.hpp"
|
|
#include "profiler.hpp"
|
|
|
|
namespace ngcore
|
|
{
|
|
|
|
#ifdef PARALLEL
|
|
|
|
template <class T> struct MPI_typetrait { };
|
|
|
|
template <> struct MPI_typetrait<int> {
|
|
static MPI_Datatype MPIType () { return MPI_INT; } };
|
|
|
|
template <> struct MPI_typetrait<short> {
|
|
static MPI_Datatype MPIType () { return MPI_SHORT; } };
|
|
|
|
template <> struct MPI_typetrait<char> {
|
|
static MPI_Datatype MPIType () { return MPI_CHAR; } };
|
|
|
|
template <> struct MPI_typetrait<signed char> {
|
|
static MPI_Datatype MPIType () { return MPI_CHAR; } };
|
|
|
|
template <> struct MPI_typetrait<unsigned char> {
|
|
static MPI_Datatype MPIType () { return MPI_CHAR; } };
|
|
|
|
template <> struct MPI_typetrait<size_t> {
|
|
static MPI_Datatype MPIType () { return MPI_UINT64_T; } };
|
|
|
|
template <> struct MPI_typetrait<double> {
|
|
static MPI_Datatype MPIType () { return MPI_DOUBLE; } };
|
|
|
|
template <> struct MPI_typetrait<bool> {
|
|
static MPI_Datatype MPIType () { return MPI_C_BOOL; } };
|
|
|
|
|
|
template <class T, class T2 = decltype(MPI_typetrait<T>::MPIType())>
|
|
inline MPI_Datatype GetMPIType () {
|
|
return MPI_typetrait<T>::MPIType();
|
|
}
|
|
|
|
template <class T>
|
|
inline MPI_Datatype GetMPIType (T &) {
|
|
return GetMPIType<T>();
|
|
}
|
|
|
|
class NgMPI_Comm
|
|
{
|
|
protected:
|
|
MPI_Comm comm;
|
|
bool valid_comm;
|
|
int * refcount;
|
|
int rank, size;
|
|
public:
|
|
NgMPI_Comm ()
|
|
: valid_comm(false), refcount(nullptr), rank(0), size(1)
|
|
{ ; }
|
|
|
|
NgMPI_Comm (MPI_Comm _comm, bool owns = false)
|
|
: comm(_comm), valid_comm(true)
|
|
{
|
|
int flag;
|
|
MPI_Initialized (&flag);
|
|
if (!flag)
|
|
{
|
|
valid_comm = false;
|
|
refcount = nullptr;
|
|
rank = 0;
|
|
size = 1;
|
|
return;
|
|
}
|
|
|
|
if (!owns)
|
|
refcount = nullptr;
|
|
else
|
|
refcount = new int{1};
|
|
|
|
MPI_Comm_rank(comm, &rank);
|
|
MPI_Comm_size(comm, &size);
|
|
}
|
|
|
|
NgMPI_Comm (const NgMPI_Comm & c)
|
|
: comm(c.comm), valid_comm(c.valid_comm), refcount(c.refcount),
|
|
rank(c.rank), size(c.size)
|
|
{
|
|
if (refcount) (*refcount)++;
|
|
}
|
|
|
|
NgMPI_Comm (NgMPI_Comm && c)
|
|
: comm(c.comm), valid_comm(c.valid_comm), refcount(c.refcount),
|
|
rank(c.rank), size(c.size)
|
|
{
|
|
c.refcount = nullptr;
|
|
}
|
|
|
|
~NgMPI_Comm()
|
|
{
|
|
if (refcount)
|
|
if (--(*refcount) == 0)
|
|
MPI_Comm_free(&comm);
|
|
}
|
|
|
|
bool ValidCommunicator() const
|
|
{
|
|
return valid_comm;
|
|
}
|
|
|
|
NgMPI_Comm & operator= (const NgMPI_Comm & c)
|
|
{
|
|
if (refcount)
|
|
if (--(*refcount) == 0)
|
|
MPI_Comm_free(&comm);
|
|
|
|
refcount = c.refcount;
|
|
if (refcount) (*refcount)++;
|
|
comm = c.comm;
|
|
valid_comm = c.valid_comm;
|
|
size = c.size;
|
|
rank = c.rank;
|
|
return *this;
|
|
}
|
|
|
|
class InvalidCommException : public Exception {
|
|
public:
|
|
InvalidCommException() : Exception("Do not have a valid communicator") { ; }
|
|
};
|
|
|
|
operator MPI_Comm() const {
|
|
if (!valid_comm) throw InvalidCommException();
|
|
return comm;
|
|
}
|
|
|
|
int Rank() const { return rank; }
|
|
int Size() const { return size; }
|
|
void Barrier() const {
|
|
static Timer t("MPI - Barrier"); RegionTimer reg(t);
|
|
if (size > 1) MPI_Barrier (comm);
|
|
}
|
|
|
|
|
|
/** --- blocking P2P --- **/
|
|
|
|
template<typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
void Send (T & val, int dest, int tag) const {
|
|
MPI_Send (&val, 1, GetMPIType<T>(), dest, tag, comm);
|
|
}
|
|
|
|
void Send (const std::string & s, int dest, int tag) const {
|
|
MPI_Send( const_cast<char*> (&s[0]), s.length(), MPI_CHAR, dest, tag, comm);
|
|
}
|
|
|
|
template<typename T, typename TI, typename T2 = decltype(GetMPIType<T>())>
|
|
void Send(FlatArray<T,TI> s, int dest, int tag) const {
|
|
MPI_Send (s.Data(), s.Size(), GetMPIType<T>(), dest, tag, comm);
|
|
}
|
|
|
|
template<typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
void Recv (T & val, int src, int tag) const {
|
|
MPI_Recv (&val, 1, GetMPIType<T>(), src, tag, comm, MPI_STATUS_IGNORE);
|
|
}
|
|
|
|
void Recv (std::string & s, int src, int tag) const {
|
|
MPI_Status status;
|
|
int len;
|
|
MPI_Probe (src, tag, comm, &status);
|
|
MPI_Get_count (&status, MPI_CHAR, &len);
|
|
// s.assign (len, ' ');
|
|
s.resize (len);
|
|
MPI_Recv( &s[0], len, MPI_CHAR, src, tag, comm, MPI_STATUS_IGNORE);
|
|
}
|
|
|
|
|
|
template <typename T, typename TI, typename T2 = decltype(GetMPIType<T>())>
|
|
void Recv (FlatArray <T,TI> s, int src, int tag) const {
|
|
MPI_Recv (s.Data(), s.Size(), GetMPIType<T> (), src, tag, comm, MPI_STATUS_IGNORE);
|
|
}
|
|
|
|
template <typename T, typename TI, typename T2 = decltype(GetMPIType<T>())>
|
|
void Recv (Array <T,TI> & s, int src, int tag) const
|
|
{
|
|
MPI_Status status;
|
|
int len;
|
|
const MPI_Datatype MPI_T = GetMPIType<T> ();
|
|
MPI_Probe (src, tag, comm, &status);
|
|
MPI_Get_count (&status, MPI_T, &len);
|
|
s.SetSize (len);
|
|
MPI_Recv (s.Data(), len, MPI_T, src, tag, comm, MPI_STATUS_IGNORE);
|
|
}
|
|
|
|
/** --- non-blocking P2P --- **/
|
|
|
|
template<typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
MPI_Request ISend (T & val, int dest, int tag) const
|
|
{
|
|
MPI_Request request;
|
|
MPI_Isend (&val, 1, GetMPIType<T>(), dest, tag, comm, &request);
|
|
return request;
|
|
}
|
|
|
|
template<typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
MPI_Request ISend (FlatArray<T> s, int dest, int tag) const
|
|
{
|
|
MPI_Request request;
|
|
MPI_Isend (s.Data(), s.Size(), GetMPIType<T>(), dest, tag, comm, &request);
|
|
return request;
|
|
}
|
|
|
|
template<typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
MPI_Request IRecv (T & val, int dest, int tag) const
|
|
{
|
|
MPI_Request request;
|
|
MPI_Irecv (&val, 1, GetMPIType<T>(), dest, tag, comm, &request);
|
|
return request;
|
|
}
|
|
|
|
template<typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
MPI_Request IRecv (FlatArray<T> s, int src, int tag) const
|
|
{
|
|
MPI_Request request;
|
|
MPI_Irecv (s.Data(), s.Size(), GetMPIType<T>(), src, tag, comm, &request);
|
|
return request;
|
|
}
|
|
|
|
|
|
/** --- collectives --- **/
|
|
|
|
template <typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
T Reduce (T d, const MPI_Op & op, int root = 0) const
|
|
{
|
|
static Timer t("MPI - Reduce"); RegionTimer reg(t);
|
|
if (size == 1) return d;
|
|
|
|
T global_d;
|
|
MPI_Reduce (&d, &global_d, 1, GetMPIType<T>(), op, root, comm);
|
|
return global_d;
|
|
}
|
|
|
|
template <typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
T AllReduce (T d, const MPI_Op & op) const
|
|
{
|
|
static Timer t("MPI - AllReduce"); RegionTimer reg(t);
|
|
if (size == 1) return d;
|
|
|
|
T global_d;
|
|
MPI_Allreduce ( &d, &global_d, 1, GetMPIType<T>(), op, comm);
|
|
return global_d;
|
|
}
|
|
|
|
template <typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
void AllReduce (FlatArray<T> d, const MPI_Op & op) const
|
|
{
|
|
static Timer t("MPI - AllReduce Array"); RegionTimer reg(t);
|
|
if (size == 1) return;
|
|
|
|
MPI_Allreduce (MPI_IN_PLACE, d.Data(), d.Size(), GetMPIType<T>(), op, comm);
|
|
}
|
|
|
|
template <typename T, typename T2 = decltype(GetMPIType<T>())>
|
|
void Bcast (T & s, int root = 0) const {
|
|
if (size == 1) return ;
|
|
static Timer t("MPI - Bcast"); RegionTimer reg(t);
|
|
MPI_Bcast (&s, 1, GetMPIType<T>(), root, comm);
|
|
}
|
|
|
|
void Bcast (std::string & s, int root = 0) const
|
|
{
|
|
if (size == 1) return;
|
|
int len = s.length();
|
|
Bcast (len, root);
|
|
if (rank != 0) s.resize (len);
|
|
MPI_Bcast (&s[0], len, MPI_CHAR, root, comm);
|
|
}
|
|
|
|
template <typename T>
|
|
void AllToAll (FlatArray<T> send, FlatArray<T> recv) const
|
|
{
|
|
MPI_Alltoall (send.Data(), 1, GetMPIType<T>(),
|
|
recv.Data(), 1, GetMPIType<T>(), comm);
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void ScatterRoot (FlatArray<T> send) const
|
|
{
|
|
if (size == 1) return;
|
|
MPI_Scatter (send.Data(), 1, GetMPIType<T>(),
|
|
MPI_IN_PLACE, -1, GetMPIType<T>(), 0, comm);
|
|
}
|
|
|
|
template <typename T>
|
|
void Scatter (T & recv) const
|
|
{
|
|
if (size == 1) return;
|
|
MPI_Scatter (NULL, 0, GetMPIType<T>(),
|
|
&recv, 1, GetMPIType<T>(), 0, comm);
|
|
}
|
|
|
|
template <typename T>
|
|
void GatherRoot (FlatArray<T> recv) const
|
|
{
|
|
recv[0] = T(0);
|
|
if (size == 1) return;
|
|
MPI_Gather (MPI_IN_PLACE, 1, GetMPIType<T>(),
|
|
recv.Data(), 1, GetMPIType<T>(), 0, comm);
|
|
}
|
|
|
|
template <typename T>
|
|
void Gather (T send) const
|
|
{
|
|
if (size == 1) return;
|
|
MPI_Gather (&send, 1, GetMPIType<T>(),
|
|
NULL, 1, GetMPIType<T>(), 0, comm);
|
|
}
|
|
|
|
|
|
template <typename T>
|
|
void AllGather (T val, FlatArray<T> recv) const
|
|
{
|
|
if (size == 1)
|
|
{
|
|
recv[0] = val;
|
|
return;
|
|
}
|
|
MPI_Allgather (&val, 1, GetMPIType<T>(),
|
|
recv.Data(), 1, GetMPIType<T>(),
|
|
comm);
|
|
}
|
|
|
|
|
|
NgMPI_Comm SubCommunicator (FlatArray<int> procs) const
|
|
{
|
|
MPI_Comm subcomm;
|
|
MPI_Group gcomm, gsubcomm;
|
|
MPI_Comm_group(comm, &gcomm);
|
|
MPI_Group_incl(gcomm, procs.Size(), procs.Data(), &gsubcomm);
|
|
MPI_Comm_create_group(comm, gsubcomm, 4242, &subcomm);
|
|
return NgMPI_Comm(subcomm, true);
|
|
}
|
|
|
|
}; // class NgMPI_Comm
|
|
|
|
NETGEN_INLINE void MyMPI_WaitAll (FlatArray<MPI_Request> requests)
|
|
{
|
|
static Timer t("MPI - WaitAll"); RegionTimer reg(t);
|
|
if (!requests.Size()) return;
|
|
MPI_Waitall (requests.Size(), requests.Data(), MPI_STATUSES_IGNORE);
|
|
}
|
|
|
|
NETGEN_INLINE int MyMPI_WaitAny (FlatArray<MPI_Request> requests)
|
|
{
|
|
int nr;
|
|
MPI_Waitany (requests.Size(), requests.Data(), &nr, MPI_STATUS_IGNORE);
|
|
return nr;
|
|
}
|
|
|
|
#else // PARALLEL
|
|
class MPI_Comm {
|
|
int nr;
|
|
public:
|
|
MPI_Comm (int _nr = 0) : nr(_nr) { ; }
|
|
operator int() const { return nr; }
|
|
bool operator== (MPI_Comm c2) const { return nr == c2.nr; }
|
|
};
|
|
static MPI_Comm MPI_COMM_WORLD = 12345, MPI_COMM_NULL = 10000;
|
|
|
|
typedef int MPI_Op;
|
|
typedef int MPI_Datatype;
|
|
typedef int MPI_Request;
|
|
|
|
enum { MPI_SUM = 0, MPI_MIN = 1, MPI_MAX = 2, MPI_LOR = 4711 };
|
|
|
|
class NgMPI_Comm
|
|
{
|
|
|
|
public:
|
|
NgMPI_Comm () { ; }
|
|
NgMPI_Comm (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 MPI_Comm() const { return MPI_Comm(); }
|
|
|
|
template<typename T>
|
|
void Send( T & val, int dest, int tag) const { ; }
|
|
|
|
template<typename T>
|
|
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>
|
|
MPI_Request ISend (T & val, int dest, int tag) const { return 0; }
|
|
|
|
template<typename T>
|
|
MPI_Request ISend (FlatArray<T> s, int dest, int tag) const { return 0; }
|
|
|
|
template<typename T>
|
|
MPI_Request IRecv (T & val, int dest, int tag) const { return 0; }
|
|
|
|
template<typename T>
|
|
MPI_Request IRecv (FlatArray<T> s, int src, int tag) const { return 0; }
|
|
|
|
template <typename T>
|
|
T Reduce (T d, const MPI_Op & op, int root = 0) const { return d; }
|
|
|
|
template <typename T>
|
|
T AllReduce (T d, const MPI_Op & op) const { return d; }
|
|
|
|
template <typename T>
|
|
void AllReduce (FlatArray<T> d, const MPI_Op & op) const { ; }
|
|
|
|
template <typename T>
|
|
void Bcast (T & s, int root = 0) const { ; }
|
|
|
|
NgMPI_Comm SubCommunicator (FlatArray<int> procs) const
|
|
{ return *this; }
|
|
};
|
|
|
|
NETGEN_INLINE void MyMPI_WaitAll (FlatArray<MPI_Request> requests) { ; }
|
|
|
|
#endif // PARALLEL
|
|
|
|
} // namespace ngcore
|
|
|
|
#endif // NGCORE_MPIWRAPPER_HPP
|
|
|