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more in core::mpi_wrapper

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This commit is contained in:
Joachim Schöberl 2019-02-13 00:11:35 +01:00
parent 67c24a044c
commit 402731ea7d
1 changed files with 42 additions and 1 deletions
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43
libsrc/core/mpi_wrapper.hpp
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@ -44,6 +44,7 @@ namespace ngcore
class NgMPI_Comm
{
protected:
MPI_Comm comm;
int * refcount;
int rank, size;
@ -108,6 +109,7 @@ namespace ngcore
}
/** --- blocking P2P --- **/
template<typename T, typename T2 = decltype(GetMPIType<T>())>
void Send (T & val, int dest, int tag) const {
@ -115,13 +117,41 @@ namespace ngcore
}
template<typename T, typename T2 = decltype(GetMPIType<T>())>
void MyMPI_Recv (T & val, int src, int tag) const {
void Recv (T & val, int src, int tag) const {
MPI_Recv (&val, 1, GetMPIType<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 IRecv (T & val, int dest, int tag) const
{
MPI_Request request;
MPI_Irecv (&val, 1, GetMPIType<T>(), dest, 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)
{
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
{
@ -162,6 +192,8 @@ namespace ngcore
static MPI_Comm MPI_COMM_WORLD = 12345, MPI_COMM_NULL = 10000;
typedef int MPI_Op;
typedef int MPI_Request;
enum { MPI_SUM = 0, MPI_MIN = 1, MPI_MAX = 2 };
class NgMPI_Comm
@ -182,6 +214,15 @@ namespace ngcore
template<typename T>
void MyMPI_Recv (T & val, 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 IRecv (T & val, int dest, int tag) const { return 0; }
template <typename T>
T Reduce (T d, const MPI_Op & op, int root = 0) { return d; }
template <typename T>
T AllReduce (T d, const MPI_Op & op) const { return d; }