On Thu, Jan 18, 2024 at 9:24 AM TARDIEU Nicolas via petsc-users < [email protected]> wrote:
> Dear PETSc Team, > > I am trying to understand how to increase the overlap of a matrix. > I wrote the attached petsc4py script where I build a simple matrix and > play with the increaseOverlap method. Unfortunately, before and after the > call, nothing changes in the index set. FYI, I have tried to mimic > src/ksp/ksp/tutorials/ex82.c > <https://petsc.org/main/src/ksp/ksp/tutorials/ex82.c.html> line 72:76. > Here is how I run the script : "mpiexec -n 2 python test_overlap.py" > > Could you please indicate what I am missing ? > Usually matrix functions like this take input in global indices. It looks like your isovl is in local indices. Am I reading that correctly? Thanks, Matt > Regards, > Nicolas > -- > Nicolas Tardieu > Ing PhD Computational Mechanics > EDF - R&D Dpt ERMES > PARIS-SACLAY, FRANCE > > > Ce message et toutes les pièces jointes (ci-après le 'Message') sont > établis à l'intention exclusive des destinataires et les informations qui y > figurent sont strictement confidentielles. Toute utilisation de ce Message > non conforme à sa destination, toute diffusion ou toute publication totale > ou partielle, est interdite sauf autorisation expresse. > > Si vous n'êtes pas le destinataire de ce Message, il vous est interdit de > le copier, de le faire suivre, de le divulguer ou d'en utiliser tout ou > partie. Si vous avez reçu ce Message par erreur, merci de le supprimer de > votre système, ainsi que toutes ses copies, et de n'en garder aucune trace > sur quelque support que ce soit. Nous vous remercions également d'en > avertir immédiatement l'expéditeur par retour du message. > > Il est impossible de garantir que les communications par messagerie > électronique arrivent en temps utile, sont sécurisées ou dénuées de toute > erreur ou virus. > ____________________________________________________ > > This message and any attachments (the 'Message') are intended solely for > the addressees. The information contained in this Message is confidential. > Any use of information contained in this Message not in accord with its > purpose, any dissemination or disclosure, either whole or partial, is > prohibited except formal approval. > > If you are not the addressee, you may not copy, forward, disclose or use > any part of it. If you have received this message in error, please delete > it and all copies from your system and notify the sender immediately by > return message. > > E-mail communication cannot be guaranteed to be timely secure, error or > virus-free. > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
