peclet::core::amr::DistributedGatherHalo< Dim, Bits > Class Template Reference

Value-only, device-resident face-neighbour gather over a fixed topology (C2). More...

#include <distributed_view.hpp>

Public Types
using	DO = DistributedOctree< Dim, Bits >

Public Member Functions
void	init (const DO &d, const typename DO::GatherHaloTopology &t)
Index	nFaces () const
void	gather (View< const double > x, View< double > g, int tag=41) const
	g (size nFaces) := the face-neighbour values of x.

Detailed Description

template<int Dim, unsigned Bits>
class peclet::core::amr::DistributedGatherHalo< Dim, Bits >

Value-only, device-resident face-neighbour gather over a fixed topology (C2).

Built once from a DistributedOctree::GatherHaloTopology; thereafter gather(x, g) moves only the compact send/recv double buffers across MPI (host-staged), with device pack/scatter kernels.

Definition at line 46 of file distributed_view.hpp.

Member Typedef Documentation

DO

template<int Dim, unsigned Bits>

using peclet::core::amr::DistributedGatherHalo< Dim, Bits >::DO = DistributedOctree<Dim, Bits>

Definition at line 48 of file distributed_view.hpp.

Member Function Documentation

init()

template<int Dim, unsigned Bits>

void peclet::core::amr::DistributedGatherHalo< Dim, Bits >::init ( const DO &  d, const typename DO::GatherHaloTopology &  t  )

inline

Definition at line 50 of file distributed_view.hpp.

References peclet::core::amr::DistributedOctree< Dim, Bits >::comm(), and peclet::core::toDevice().

nFaces()

template<int Dim, unsigned Bits>

Index peclet::core::amr::DistributedGatherHalo< Dim, Bits >::nFaces ( ) const

inline

Definition at line 78 of file distributed_view.hpp.

gather()

template<int Dim, unsigned Bits>

void peclet::core::amr::DistributedGatherHalo< Dim, Bits >::gather ( View< const double >  x, View< double >  g, int  tag = 41  ) const

inline

g (size nFaces) := the face-neighbour values of x.

Local faces fill on device; cross-rank faces cross MPI as a compact host-staged values buffer (no coords). Bit-identical to the host faceNeighborGather over the same field (periodic ⇒ every slot is filled; no sentinels).

Definition at line 83 of file distributed_view.hpp.

References peclet::core::halo::detail::gpuAwareMpi(), MPI_BYTE, MPI_Irecv(), MPI_Isend(), MPI_STATUSES_IGNORE, and MPI_Waitall().

---

The documentation for this class was generated from the following file:

• distributed_view.hpp