grid_halo.hpp File Reference

#include <cstdio>
#include <cstdlib>
#include <type_traits>
#include <vector>
#include "peclet/core/common/mpi.hpp"
#include "peclet/core/common/types.hpp"
#include "peclet/core/common/view.hpp"
#include "peclet/core/halo/grid_halo_topology.hpp"

Go to the source code of this file.

Classes
class	peclet::core::halo::GridHalo< T >
	GPU ghost-layer exchange for a contiguous device field peclet::core::View<T> (one element per extended-block cell). More...

Namespaces
namespace	peclet
namespace	peclet::core
namespace	peclet::core::halo
namespace	peclet::core::halo::detail

Functions
bool	peclet::core::halo::detail::mpiReportsCudaAware ()
	Does the MPI library itself claim CUDA awareness (OpenMPI's MPIX_Query_cuda_support)? Some stacks under-report (measured: user-space OpenMPI 5.0.7 + UCX 1.20.1 with working cuda_ipc returns 0 — see core/docs/cuda-aware-mpi.md), so this is only used to AUTO-enable, never to veto an explicit env request.
bool	peclet::core::halo::detail::probeGpuAwareMpi ()
	Probe whether MPI actually accepts DEVICE pointers (GPU-aware MPI): checksummed loopback Sendrecv on MPI_COMM_SELF with device buffers, errors returned (not fatal) and the payload verified on device.
bool	peclet::core::halo::detail::gpuAwareMpi ()
	Whether to hand DEVICE pointers straight to MPI (GPU-aware MPI) instead of host-staging.