Bruno, Le lun. 4 mars 2019 à 09:21, Bruno Blais <[email protected]> a écrit : > Would I see significant performance gain for a GMRES + ILU preconditioning setup by going from AztecOO to the Tpetra or Belos stack?
No, I don't think so. You should get very close performance. On top of that, deal.II does not support Tpetra matrices right now, so you will have to make it work yourself. > I guess that the best parallel performance increase I could get would be by using the AMG from ML, but I think this will require some experiments before I can set-up the parameters correctly. My system is not elliptic and can be quite ugly at times due to stabilization. There is a parameter that you can switch if your system is not elliptic (see here <https://dealii.org/developer/doxygen/deal.II/structTrilinosWrappers_1_1PreconditionAMG_1_1AdditionalData.html>) but you will probably need to tweak more than this parameter. If you can start from a coarse mesh that you refine in deal.II, you can use the geometric multigrid preconditioner in deal.II (see step 56) Best, Bruno -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
