petsc-3.7.7 2017-09-25

KSPGetTolerances

Gets the relative, absolute, divergence, and maximum iteration tolerances used by the default KSP convergence tests.

#include "petscksp.h" 
PetscErrorCode  KSPGetTolerances(KSP ksp,PetscReal *rtol,PetscReal *abstol,PetscReal *dtol,PetscInt *maxits)

Not Collective

ksp -the Krylov subspace context

	rtol	- the relative convergence tolerance
	abstol	- the absolute convergence tolerance
	dtol	- the divergence tolerance
	maxits	- maximum number of iterations

The user can specify NULL for any parameter that is not needed.

KSP, get, tolerance, absolute, relative, divergence, convergence,
maximum, iterations