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 on ksp
Input Parameter#
ksp - the linear solver (KSP) context.
Output Parameter#
beta - the result of the norm
Developer Notes#
Used to manage returning from KSP
solvers whose preconditioners have failed, possibly only a subset of MPI ranks, 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()
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