PETSc version 3.17.4
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MatCreateH2OpusFromKernel

Creates a MATH2OPUS from a user-supplied kernel.

Synopsis

PetscErrorCode MatCreateH2OpusFromKernel(MPI_Comm comm, PetscInt m, PetscInt n, PetscInt M, PetscInt N, PetscInt spacedim, const PetscReal coords[], PetscBool cdist, MatH2OpusKernel kernel, void *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)
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 <PetscInt> - Leaf size of cluster tree
-mat_h2opus_eta <PetscReal> - Admissibility condition tolerance
-mat_h2opus_order <PetscInt> - Chebychev approximation order
-mat_h2opus_normsamples <PetscInt> - Maximum number of samples to be used when estimating norms

See Also

MatCreate(), MATH2OPUS, MatCreateH2OpusFromMat()

Level

intermediate

Location

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

Examples

src/ksp/ksp/tutorials/ex21.c.html

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