petsc-3.14.6 2021-03-30

KSPMonitorSolution

Monitors progress of the KSP solvers by calling VecView() for the approximate solution at each iteration.

#include "petscksp.h" 
PetscErrorCode  KSPMonitorSolution(KSP ksp,PetscInt its,PetscReal fgnorm,PetscViewerAndFormat *dummy)

Collective on ksp

For some Krylov methods such as GMRES constructing the solution at each iteration is expensive, hence using this will slow the code.

intermediate