PCAIRSetCoarsestMatrixFreePolys

Sets whether PCAIR applies the coarse-grid polynomial solver matrix-free

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetCoarsestMatrixFreePolys(PC pc, PetscBool input_bool)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_bool - PETSC_TRUE to apply the coarse-grid polynomial solver matrix-free

Options Database Key

• -pc_air_coarsest_matrix_free_polys (true|false) - apply the coarse-grid polynomial solver matrix-free; defaults to false

Note

As PCAIRSetMatrixFreePolys() but for the coarse-grid polynomial solver; the coarse solve is applied as matrix-vector products rather than by assembling the inverse, trading memory for a more expensive apply. This only has an effect for the polynomial coarse-grid inverse types.

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetCoarsestMatrixFreePolys(), PCAIRSetMatrixFreePolys(), PCAIRSetCoarsestInverseType()

Level

advanced

Index of all PC routines
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