> On Oct 7, 2015, at 5:12 PM, William Coirier > <[email protected]> wrote: > > Without going into too many details regarding the application, here is a > problem I’ve encountered and wonder if anyone has any suggestions. > > I have supplied a convergence test function for SNES using the > SNESSetConvergenceTest API. My convergence test function sets the > SNESConvergedReason variable referenced in the argument list to a handful of > SNESConvergedReasons (and does other stuff, but that is not relevant…) > > In my application code, after I call SNESSolve, I call > SNESGetConvergedReason, and for some reason I will occasionally see > SNESConvergedReasons that are NOT in the subset of those I supply with my > convergence test function. > > It’s as if my test function setting of the converged reason is either being > overwritten, or ignored. > > As an example, I’m using the newtonls (default) scheme, and (an inexact, but > workable) Jacobian. My test function only will set SNESConvergedReason to > SNES_CONVERGED_ITERATING, SNES_CONVERGED_SNORM_RELATIVE or > SNES_DIVERGED_MAX_IT. But, I see DIVERGED_LINE_SEARCH from the call to > SNESGetConvergedReason.
The line search routines themselves can set the converged reason, when the line search fails, this happens before it has the next solution so before the next time your line search tester is called. So your value is not been overwritten or ignored. I am not sure what you want to do about this? It is just the way it is. Barry > > Is the line search diverging (most likely?!) and blowing by my convergence > test function?? Maybe (most likely?) I’m doing something stupid… > > Otherwise things are working great. PETSc is awesome! > > Any help/suggestions/input is appreciated. > > > ----------------------------------------------------------------------- > William J. Coirier, Ph.D. > Director, Aerosciences and Engineering Analysis > Advanced Technology Division > Kratos/Digital Fusion, Inc. > 4904 Research Drive > Huntsville, AL 35805 > 256-327-8170 > 256-327-8120 (fax) > > > -------------------------------------------------------------------------------------------------------------------- > > ***NOTICE*** This e-mail and/or the attached documents may contain technical > data within the definition of the International Traffic in Arms Regulations > and/or Export Administration Regulations, and are subject to the export > control laws of the U.S. Government. Transfer of this data by any means to a > foreign person, whether in the United States or abroad, without an export > license or other approval from the U.S. Department of State or Commerce, as > applicable, is prohibited. No portion of this e-mail or its attachment(s) may > be reproduced without written consent of Kratos Defense & Security Solutions, > Inc. Any views expressed in this message are those of the individual sender, > except where the message states otherwise and the sender is authorized to > state them to be the views of any such entity. The information contained in > this message and or attachments is intended only for the person or entity to > which it is addressed and may contain confidential and/or privileged > material. If you are not the intended recipient or believe that you may have > received this document in error, please notify the sender and delete this > e-mail and any attachments immediately.
