PetscSFSetFromOptions#

set PetscSF options using the options database

Synopsis#

#include "petscsf.h" 
PetscErrorCode PetscSFSetFromOptions(PetscSF sf)

Logically Collective

-sf_type - implementation type, see PetscSFSetType()
-sf_rank_order - sort composite points for gathers and scatters in rank order, gathers are non-deterministic otherwise
-sf_use_default_stream - Assume callers of PetscSF computed the input root/leafdata with the default CUDA stream. PetscSF will also use the default stream to process data. Therefore, no stream synchronization is needed between PetscSF and its caller (default: true). If true, this option only works with -use_gpu_aware_mpi 1.
-sf_use_stream_aware_mpi - Assume the underlying MPI is CUDA-stream aware and PetscSF won’t sync streams for send/recv buffers passed to MPI (default: false). If true, this option only works with -use_gpu_aware_mpi 1.
-sf_backend cuda | hip | kokkos - Select the device backend SF uses. Currently PetscSF has these backends: cuda, hip and Kokkos. On CUDA (HIP) devices, one can choose cuda (hip) or kokkos with the default being kokkos. On other devices, the only available is kokkos.