KSPSetMinimumIterations#
Sets the minimum number of iterations to use, regardless of the tolerances
Synopsis#
#include "petscksp.h"
#include "petscmat.h"
PetscErrorCode KSPSetMinimumIterations(KSP ksp, PetscInt minit)
Logically Collective
Input Parameters#
ksp - the Krylov subspace context
minit - minimum number of iterations to use
Options Database Key#
-ksp_min_it
- Setsminit
Notes#
Use KSPSetTolerances() to set a variety of other tolerances
See KSPConvergedDefault() for details on how these parameters are used in the default convergence test. See also KSPSetConvergenceTest()
for setting user-defined stopping criteria.
If the initial residual norm is small enough solvers may return immediately without computing any improvement to the solution. Using this routine prevents that which usually ensures the solution is changed (often minimally) from the previous solution. This option may be used with ODE integrators to ensure the integrator does not fall into a false steady-state solution of the ODE.
See Also#
KSP: Linear System Solvers, KSPGetTolerances(), KSPConvergedDefault(), KSPSetConvergenceTest(), KSP, KSPSetTolerances(), KSPGetMinimumIterations()
Level#
intermediate
Location#
src/ksp/ksp/interface/itfunc.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages