petsc-3.13.6 2020-09-29
KSPMonitorTrueResidualNorm
Prints the true residual norm as well as the preconditioned residual norm at each iteration of an iterative solver.
Synopsis
#include "petscksp.h"
PetscErrorCode KSPMonitorTrueResidualNorm(KSP ksp,PetscInt n,PetscReal rnorm,PetscViewerAndFormat *dummy)
Collective on ksp
Input Parameters
| ksp | - iterative context
|
| n | - iteration number
|
| rnorm | - 2-norm (preconditioned) residual value (may be estimated).
|
| dummy | - an ASCII PetscViewer
|
Options Database Key
-ksp_monitor_true_residual -Activates KSPMonitorTrueResidualNorm()
Notes
When using right preconditioning, these values are equivalent.
See Also
KSPMonitorSet(), KSPMonitorDefault(), KSPMonitorLGResidualNormCreate(),KSPMonitorTrueResidualMaxNorm()
Level
intermediate
Location
src/ksp/ksp/interface/iterativ.c
Examples
src/snes/tutorials/ex12.c.html
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages