KSPTrueMonitor

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

Synopsis

#include "petscksp.h" 
int KSPTrueMonitor(KSP ksp,int n,PetscReal rnorm,void *dummy)

Collective on KSP

Input Parameters

	ksp	- iterative context
	n	- iteration number
	rnorm	- 2-norm (preconditioned) residual value (may be estimated).
	dummy	- unused monitor context

Options Database Key

-ksp_truemonitor -Activates KSPTrueMonitor()

Notes

When using right preconditioning, these values are equivalent.

When using either ICC or ILU preconditioners in BlockSolve95 (via MATMPIROWBS matrix format), then use this monitor will print both the residual norm associated with the original (unscaled) matrix.

Keywords