#include "petscksp.h" PetscErrorCode KSPGetConvergedReason(KSP ksp,KSPConvergedReason *reason)Not Collective

See also manual page for each reason.

guess: beginner

Notes: Can only be called after the call the KSPSolve() is complete.

** 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

src/ksp/pc/examples/tutorials/ex2.c.html

src/ksp/ksp/examples/tutorials/ex10.c.html

KSP_CONVERGED_RTOL (residual 2 | - norm decreased by a factor of rtol, from 2-norm of right hand side) | |

KSP_CONVERGED_ATOL (residual 2 | - norm less than abstol) | |

KSP_CONVERGED_ITS (used by the preonly preconditioner that always uses ONE iteration, or when the KSPConvergedSkip() convergence | - test routine is set. | |

KSP_CONVERGED_CG_NEG_CURVE | - . KSP_CONVERGED_CG_CONSTRAINED | |

KSP_CONVERGED_STEP_LENGTH | - . KSP_DIVERGED_ITS (required more than its to reach convergence) | |

KSP_DIVERGED_DTOL (residual norm increased by a factor of divtol) | - . KSP_DIVERGED_NANORINF (residual norm became Not-a-number or Inf likely due to 0/0) | |

KSP_DIVERGED_BREAKDOWN (generic breakdown in method) | - - KSP_DIVERGED_BREAKDOWN_BICG (Initial residual is orthogonal to preconditioned initial residual. Try a different preconditioner, or a different initial Level.) |