KSPCheckNorm#
Checks if the result of a norm used by the corresponding KSP contains inf or NaN. These indicate that the previous application of the preconditioner generated an error. Sets a KSPConvergedReason and returns if the PC set a PCFailedReason. Collective
Input Parameter#
ksp - the linear solver
KSPcontext.
Output Parameter#
beta - the result of the norm
Developer Notes#
Used to manage returning from KSP solvers collectively whose preconditioners have failed, possibly only a subset of MPI processes, in some way.
It uses the fact that KSP piggy-backs the collectivity of certain error conditions on the results of norms and inner products.
See Also#
PCFailedReason, KSPConvergedReason, PCGetFailedReasonRank(), KSP, KSPCreate(), KSPSetType(), KSP, KSPCheckDot(), KSPCheckSolve(),
KSPSetErrorIfNotConverged()
Level#
developer
Location#
include/petsc/private/kspimpl.h
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages