KSPGMRESSetHapTol#
Sets tolerance for determining happy breakdown in KSPGMRES, KSPFGMRES and KSPLGMRES
Synopsis#
#include "petscksp.h"
PetscErrorCode KSPGMRESSetHapTol(KSP ksp, PetscReal tol)
Logically Collective
Input Parameters#
ksp - the Krylov space context
tol - the tolerance
Options Database Key#
-ksp_gmres_haptol
- set tolerance for determining happy breakdown
Note#
Happy breakdown is the rare case in KSPGMRES where an ‘exact’ solution is obtained after
a certain number of iterations. If you attempt more iterations after this point unstable
things can happen hence very occasionally you may need to set this value to detect this condition
See Also#
Level#
intermediate
Location#
Implementations#
KSPGMRESSetHapTol_GMRES() in src/ksp/ksp/impls/gmres/gmres.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages