MatCreateH2OpusFromKernel

Creates a MATH2OPUS from a user-supplied kernel.

Synopsis

#include "petscmat.h"   
PetscErrorCode MatCreateH2OpusFromKernel(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt M, PetscInt N, PetscInt spacedim, const PetscReal coords[], PetscBool cdist, MatH2OpusKernelFn *kernel, PetscCtx kernelctx, PetscReal eta, PetscInt leafsize, PetscInt basisord, Mat *nA)

Input Parameters

• comm - MPI communicator

• m - number of local rows (or PETSC_DECIDE to have calculated if M is given)

• n - number of local columns (or PETSC_DECIDE to have calculated if N is given)

• M - number of global rows (or PETSC_DETERMINE to have calculated if m is given)

• N - number of global columns (or PETSC_DETERMINE to have calculated if n is given)

• spacedim - dimension of the space coordinates

• coords - coordinates of the points

• cdist - whether or not coordinates are distributed

• kernel - computational kernel (or NULL), see MatH2OpusKernelFn for the calling sequence

• kernelctx - kernel context

• eta - admissibility condition tolerance

• leafsize - leaf size in cluster tree

• basisord - approximation order for Chebychev interpolation of low-rank blocks

Output Parameter

• nA - matrix

Options Database Keys

• -mat_h2opus_leafsize leafsize - Leaf size of cluster tree

• -mat_h2opus_eta eta - Admissibility condition tolerance

• -mat_h2opus_order order - Chebychev approximation order

• -mat_h2opus_normsamples maxsamples - Maximum number of samples to be used when estimating norms

Note

Requires ./configure with --download-h2opus or --with-h2opus-dir

See Also

Matrices, Mat, MatCreate(), MATH2OPUS, MatCreateH2OpusFromMat(), MatH2OpusKernelFn

Level

intermediate

Location

src/mat/impls/h2opus/cuda/math2opus.cu

Examples

src/mat/tests/ex66.c
src/ksp/ksp/tutorials/ex21.c

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