its -number of iterations required
Notes
On return, the parameter "its" contains either the
iterationnumber at which convergence was successfully reached, or
thenegative of the iteration at which divergence or breakdown was detected.
If using a direct method (e.g., via the KSP
solverKSPPREONLY and a preconditioner such as PCLU/PCILU),
then its=1. See KSPSetTolerances() and KSPDefaultConverged()
for more details.
Understanding Convergence
The routines KSPSetMonitor(), KSPComputeEigenvalues(),
andKSPComputeEigenvaluesExplicitly() provide information on
additionaloptions to monitor convergence and print eigenvalue information.
Keywords
KSP, solve, linear system
See Also
KSPCreate(), KSPSetUp(), KSPDestroy(), KSPSetTolerances(), KSPDefaultConverged()
Location: src/ksp/interface/itfunc.c
KSP Index
Table of Contents