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KSPMonitorTrueResidual

Prints the true residual norm, as well as the preconditioned residual norm, at each iteration of an iterative solver.

Synopsis

#include "petscksp.h" 
PetscErrorCode KSPMonitorTrueResidual(KSP ksp, PetscInt n, PetscReal rnorm, PetscViewerAndFormat *vf)
Collective on ksp

Input Parameters

ksp - iterative context
n - iteration number
rnorm - 2-norm (preconditioned) residual value (may be estimated).
vf - The viewer context

Options Database Key

-ksp_monitor_true_residual - Activates KSPMonitorTrueResidual()

Notes

When using right preconditioning, these values are equivalent.

See Also

KSPMonitorSet(), KSPMonitorResidual(),KSPMonitorTrueResidualMaxNorm()

Level

intermediate

Location

src/ksp/ksp/interface/iterativ.c

Examples

src/snes/tutorials/ex12.c.html

Index of all KSP routines
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Index of all manual pages