petsc-3.14.6 2021-03-30

DMKSPSetComputeRHS

set KSP right hand side evaluation function

Synopsis

#include "petscksp.h" 
PetscErrorCode DMKSPSetComputeRHS(DM dm,PetscErrorCode (*func)(KSP,Vec,void*),void *ctx)

Not Collective

Input Argument

	dm	- DM to be used with KSP
	func	- right hand side evaluation function, see KSPSetComputeRHS() for calling sequence
	ctx	- context for right hand side evaluation

Note

KSPSetComputeRHS() is normally used, but it calls this function internally because the user context is actually associated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or not. If DM took a more central role at some later date, this could become the primary method of setting the matrix.

Level

advanced

Location