petsc-3.6.2 2015-10-02
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# KSPMonitorTrueResidualMaxNorm

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

### Synopsis

    #include "petscksp.h"
    PetscErrorCode  KSPMonitorTrueResidualMaxNorm(KSP ksp,PetscInt n,PetscReal rnorm,void *dummy)

Collective on KSP

### Input Parameters

| ksp | - iterative context
| n | - iteration number
| rnorm | - norm (preconditioned) residual value (may be estimated).
| dummy | - unused monitor context

### Options Database Key

-ksp_monitor_max -Activates KSPMonitorTrueResidualMaxNorm()

### Notes

This could be implemented (better) with a flag in ksp.

### Keywords

KSP, default, monitor, residual

### See Also

KSPMonitorSet(), KSPMonitorDefault(), KSPMonitorLGResidualNormCreate(),KSPMonitorTrueResidualNorm()

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