PCSetReusePreconditioner

reuse the current preconditioner even if the operator in the preconditioner has changed.

Synopsis

#include "petscksp.h" 
PetscErrorCode PCSetReusePreconditioner(PC pc, PetscBool flag)

Logically Collective

Input Parameters

• pc - the preconditioner context

• flag - PETSC_TRUE do not compute a new preconditioner, PETSC_FALSE do compute a new preconditioner

Note

Normally if a matrix inside a PC changes the PC automatically updates itself using information from the changed matrix. This option prevents this.

See Also

PC, PCGetOperators(), MatZeroEntries(), PCGetReusePreconditioner(), KSPSetReusePreconditioner()

Level

intermediate

Location

src/ksp/pc/interface/precon.c

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Index of all PC routines
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