petsc-3.14.6 2021-03-30

PetscOptionsGetViewerOff

does PetscOptionsGetViewer return a viewer?

#include "petscviewer.h" 
PetscErrorCode  PetscOptionsGetViewerOff(PetscBool *flg)

Logically Collective

flg

- whether viewers are returned.

Calling XXXViewFromOptions in an inner loop can be very expensive. This can appear, for example, when using many small subsolves.

developer