petsc-3.13.6 2020-09-29
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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