Question #107349 on DOLFIN changed: https://answers.launchpad.net/dolfin/+question/107349
Garth Wells proposed the following answer: On 16/04/10 18:51, Anders Logg wrote: > Question #107349 on DOLFIN changed: > https://answers.launchpad.net/dolfin/+question/107349 > > Status: Open => Answered > > Anders Logg proposed the following answer: > It's a global parameter now valid for both the Krylov and Newton > solvers, but perhaps it should be a local paramer. Opinions? It should definitely be possible to set it independently for different instances of Krylov solvers and Newton solvers. Garth > > -- > Anders > > > On Fri, Apr 16, 2010 at 01:33:26PM -0000, bluejerry wrote: >> Question #107349 on DOLFIN changed: >> https://answers.launchpad.net/dolfin/+question/107349 >> >> Status: Answered => Open >> >> bluejerry is still having a problem: >> Thanks that looks better. >> >> I assume this is to be set in the 'krylov_solver' submenu? If so it is not >> in the parameter options (KeyError) in my last bzr pull (today) >> >> Unless there is something I am missing. >> >> Renier >> >> On Thu, Apr 15, 2010 at 9:00 PM, Anders Logg< >> question107...@answers.launchpad.net> wrote: >> >>> Question #107349 on DOLFIN changed: >>> https://answers.launchpad.net/dolfin/+question/107349 >>> >>> Anders Logg proposed the following answer: >>> On Wed, Apr 14, 2010 at 11:50:36AM +0200, Anders Logg wrote: >>>> On Wed, Apr 14, 2010 at 09:33:20AM -0000, Garth Wells wrote: >>>>> Question #107349 on DOLFIN changed: >>>>> https://answers.launchpad.net/dolfin/+question/107349 >>>>> >>>>> Garth Wells proposed the following answer: >>>>> >>>>> On 14/04/10 17:17, Anders Logg wrote: >>>>>> On Wed, Apr 14, 2010 at 07:17:44AM -0000, bluejerry wrote: >>>>>>> New question #107349 on DOLFIN: >>>>>>> https://answers.launchpad.net/dolfin/+question/107349 >>>>>>> >>>>>>> Is it possible to receive some sorf of error feedback when a >>> solution did not converge while using the Krylov solver. A warning is >>> printed by the PETsc solver that it did not converge, but I can't seem to >>> find a way to detect this programatically. The solve method returns a >>> Function even if the solver did not converge. >>>>>>> >>>>>>> Thank you >>>>>>> >>>>>>> Renier >>>>>> >>>>>> We had a similar problem with the Newton solver last week. It didn't >>>>>> converge but we thought it did. >>>>>> >>>>>> I would also like to see an error when the solver doesn't converge. >>>>>> >>>>> >>>>> Just an error is bad. Presently, a warning message is printed, but we >>>>> can add a parameter to switch between error/warning. >>>> >>>> Sounds good. I think it should be set to error by default with the >>>> possibility to change it to a warning. That is safest for first time >>>> users. Someone with a little more experience would check for >>>> convergence and have a strategy for handling the case where things >>>> don't converge (change of parameters, time step etc). >>> >>> Done. The parameter name is "error_on_nonconvergence". >>> >>> >>> >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~dolfin >>> Post to : dolfin@lists.launchpad.net >>> Unsubscribe : https://launchpad.net/~dolfin >>> More help : https://help.launchpad.net/ListHelp >>> >> > -- You received this question notification because you are a member of DOLFIN Team, which is an answer contact for DOLFIN. _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : dolfin@lists.launchpad.net Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
