/*@C
KSPMonitorTrueResidualMaxNorm - Prints the true residual max norm as well as the preconditioned
residual norm at each iteration of an iterative solver.
Collective on KSP
Input Parameters:
+ ksp - iterative context
. n - iteration number
. rnorm - norm (preconditioned) residual value (may be estimated).
- dummy - an ASCII viewer
Options Database Key:
. -ksp_monitor_max - Activates KSPMonitorTrueResidualMaxNorm()
Notes:
This could be implemented (better) with a flag in ksp.
Level: intermediate
.keywords: KSP, default, monitor, residual
.seealso: KSPMonitorSet(), KSPMonitorDefault(), KSPMonitorLGResidualNormCreate(),KSPMonitorTrueResidualNorm()
@*/
PetscErrorCode KSPMonitorTrueResidualMaxNorm(KSP ksp,PetscInt n,PetscReal rnorm,void *dummy)
{
PetscErrorCode ierr;
Vec resid;
PetscReal truenorm,bnorm;
PetscViewer viewer = (PetscViewer)dummy;
char normtype[256];
PetscFunctionBegin;
PetscValidHeaderSpecific(viewer,PETSC_VIEWER_CLASSID,4);
ierr = PetscViewerASCIIAddTab(viewer,((PetscObject)ksp)->tablevel);CHKERRQ(ierr);
if (n == 0 && ((PetscObject)ksp)->prefix) {
ierr = PetscViewerASCIIPrintf(viewer," Residual norms (max) for %s solve.\n",((PetscObject)ksp)->prefix);CHKERRQ(ierr);
}
ierr = KSPBuildResidual(ksp,NULL,NULL,&resid);CHKERRQ(ierr);
ierr = VecNorm(resid,NORM_INFINITY,&truenorm);CHKERRQ(ierr);
ierr = VecDestroy(&resid);CHKERRQ(ierr);
ierr = VecNorm(ksp->vec_rhs,NORM_INFINITY,&bnorm);CHKERRQ(ierr);
ierr = PetscStrncpy(normtype,KSPNormTypes[ksp->normtype],sizeof(normtype));CHKERRQ(ierr);
ierr = PetscStrtolower(normtype);CHKERRQ(ierr);
/* ierr = PetscViewerASCIIPrintf(viewer,"%3D KSP %s resid norm %14.12e true resid norm %14.12e ||r(i)||_inf/||b||_inf %14.12e\n",n,normtype,(double)rnorm,(double)truenorm,(double)(truenorm/bnorm));CHKERRQ(ierr); */
ierr = PetscViewerASCIIPrintf(viewer,"%3D KSP true resid max norm %14.12e ||r(i)||/||b|| %14.12e\n",n,(double)truenorm,(double)(truenorm/bnorm));CHKERRQ(ierr);
ierr = PetscViewerASCIISubtractTab(viewer,((PetscObject)ksp)->tablevel);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
/*@C
KSPMonitorTrueResidualNorm - Prints the true residual norm as well as the preconditioned
residual norm at each iteration of an iterative solver.
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_monitor_true_residual - Activates KSPMonitorTrueResidualNorm()
Notes:
When using right preconditioning, these values are equivalent.
Level: intermediate
.keywords: KSP, default, monitor, residual
.seealso: KSPMonitorSet(), KSPMonitorDefault(), KSPMonitorLGResidualNormCreate(),KSPMonitorTrueResidualMaxNorm()
@*/
PetscErrorCode KSPMonitorTrueResidualNorm(KSP ksp,PetscInt n,PetscReal rnorm,void *dummy)
{
PetscErrorCode ierr;
Vec resid;
PetscReal truenorm,bnorm;
PetscViewer viewer = (PetscViewer)dummy;
char normtype[256];
PetscFunctionBegin;
if (!viewer) {
ierr = PetscViewerASCIIGetStdout(PetscObjectComm((PetscObject)ksp),&viewer);CHKERRQ(ierr);
}
ierr = PetscViewerASCIIAddTab(viewer,((PetscObject)ksp)->tablevel);CHKERRQ(ierr);
if (n == 0 && ((PetscObject)ksp)->prefix) {
ierr = PetscViewerASCIIPrintf(viewer," Residual norms for %s solve.\n",((PetscObject)ksp)->prefix);CHKERRQ(ierr);
}
ierr = KSPBuildResidual(ksp,NULL,NULL,&resid);CHKERRQ(ierr);
ierr = VecNorm(resid,NORM_2,&truenorm);CHKERRQ(ierr);
ierr = VecDestroy(&resid);CHKERRQ(ierr);
ierr = VecNorm(ksp->vec_rhs,NORM_2,&bnorm);CHKERRQ(ierr);
ierr = PetscStrncpy(normtype,KSPNormTypes[ksp->normtype],sizeof(normtype));CHKERRQ(ierr);
ierr = PetscStrtolower(normtype);CHKERRQ(ierr);
ierr = PetscViewerASCIIPrintf(viewer,"%3D KSP %s resid norm %14.12e true resid norm %14.12e ||r(i)||/||b|| %14.12e\n",n,normtype,(double)rnorm,(double)truenorm,(double)(truenorm/bnorm));CHKERRQ(ierr);
ierr = PetscViewerASCIISubtractTab(viewer,((PetscObject)ksp)->tablevel);CHKERRQ(ierr);
PetscFunctionReturn(0);
}