Prints the true residual norm, as well as the (possibly preconditioned) approximate residual norm, at each iteration of an iterative solver.
#include "petscksp.h" PetscErrorCode KSPMonitorTrueResidual(KSP ksp, PetscInt n, PetscReal rnorm, PetscViewerAndFormat *vf)
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
When using right preconditioning, these values are equivalent.
This is not called directly by users, rather one calls
KSPMonitorSet(), with this function as an argument, to cause the monitor
to be used during the
KSP: Linear System Solvers,
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages