PCSetErrorIfFailure#
Causes PC to generate an error if a floating point exception, for example a zero pivot, is detected.
Synopsis#
#include "petscksp.h"
PetscErrorCode PCSetErrorIfFailure(PC pc, PetscBool flg)
Logically Collective
Input Parameters#
pc - iterative context obtained from
PCCreate()flg -
PETSC_TRUEindicates you want the error generated
Notes#
Normally PETSc continues if a linear solver fails due to a failed setup of a preconditioner, you can call KSPGetConvergedReason() after a KSPSolve()
to determine if it has converged or failed. Or use -ksp_error_if_not_converged to cause the program to terminate as soon as lack of convergence is
detected.
This is propagated into KSPs used by this PC, which then propagate it into PCs used by those KSPs
See Also#
KSP: Linear System Solvers, PC, KSPSetErrorIfNotConverged(), PCGetInitialGuessNonzero(), PCSetInitialGuessKnoll(), PCGetInitialGuessKnoll()
Level#
advanced
Location#
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages