PCAIRSetAutoTruncateStartLevel

Sets the level from which PCAIR builds and evaluates a coarse-grid solver to decide whether the hierarchy can be truncated there

Synopsis

PETSC_EXTERN PetscErrorCode PCAIRSetAutoTruncateStartLevel(PC pc, PetscInt input_int)

Logically Collective

Input Parameters

• pc - the PCAIR preconditioner context

• input_int - the level from which to build a coarse solver and test whether the hierarchy can be truncated

Options Database Key

• -pc_air_auto_truncate_start_level input_int - use auto truncation from this level onwards; defaults to -1

Note

A value of -1 disables auto truncation, so the hierarchy is always built down to PCAIRSetCoarseEqLimit().

See Also

KSP: Linear System Solvers, PCAIR, PCAIRGetAutoTruncateStartLevel(), PCAIRSetAutoTruncateTol()

Level

advanced

Index of all PC routines
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Index of all manual pages