petsc-3.7.1 2016-05-15
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 Many br
Input Parameters
| ksp | - iterative context Many br |
| n | - iteration number Many br |
| rnorm | - 2-norm (preconditioned) residual value (may be estimated). Many br |
| dummy | - an ASCII PetscViewer Many br |
Options Database Key
-ksp_monitor_true_residual -Activates KSPMonitorTrueResidualNorm() Many br
Notes
When using right preconditioning, these values are equivalent. Many br
Many br
Keywords
KSP, default, monitor, residual
See Also
KSPMonitorSet(), KSPMonitorDefault(), KSPMonitorLGResidualNormCreate(),KSPMonitorTrueResidualMaxNorm()
Level:intermediate
Location:src/ksp/ksp/interface/iterativ.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages
Examples
src/snes/examples/tutorials/ex12.c.html