DMKSPSetCreateOperators

set the KSP matrix creation function used in KSPSetUp()

Synopsis

#include "petscksp.h" 
PetscErrorCode DMKSPSetCreateOperators(DM dm, KSPCreateOperatorsFn *func, PetscCtx ctx)

Logically Collective

Input Parameters

• dm - DM to be used with KSP

• func - matrix creation function, for calling sequence see KSPCreateOperatorsFn

• ctx - context for matrix creation

Notes

func is called by KSPSetUp() when KSPSetDMActive() has enabled the KSP_DMACTIVE_OPERATOR flag. It is used to create once the matrices before the matrix evaluation function set with DMKSPSetComputeOperators() is called. Pass NULL for both func and ctx to remove the callback.

If this matrix creation function is not provided, KSPSetUp() will create a single matrix A (also used for P) using DMCreateMatrix().

See Also

KSP: Linear System Solvers, DMKSP, DM, KSP, DMKSPGetCreateOperators(), DMKSPSetComputeOperators(), KSPCreateOperatorsFn, KSPSetDMActive(), KSPSetOperators(), DMCreateMatrix()

Level

developer

Location

src/ksp/ksp/interface/dmksp.c

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