[petsc-users] Petsc Options

[Matthew Knepley]

On Mon, Nov 14, 2011 at 9:16 PM, Cody Permann <codypermann at gmail.com> wrote:

> How about a function that would fill in a char *[] with the options used
> or a function that would return a boolean for a single option indicating
> whether it was used or not?  Basically we just need a public way to get at
> the data in PetscOptionTable::used.
>

I don't like the whole table of options used, and we definitely need
PetscOptionsOptionUsed(). What about providing
the number of options, and an array of all option names?

   Matt


> Thanks,
> Cody
>
> On Nov 14, 2011, at 12:41 PM, Barry Smith wrote:
>
> >
> >  Cody,
> >
> >    What would you like the API to look like?
> >
> >   Barry
> >
> >
> > On Nov 14, 2011, at 1:39 PM, Cody Permann wrote:
> >
> >> There doesn't appear to be an API in PETSc for getting back the command
> line options "used" or "unused" for a simulation.  Yes I am aware that the
> options unused can be printed but there doesn't appear to be a mechanism
> for returning them back through a function call.  I'd like to add an option
> to MOOSE that would work like PETSc's "-options_left" CLI argument, but in
> order to do so I need to combine the options recognized for both libraries
> to report the global unused list.  Right now both MOOSE and PETSc have full
> access to the raw ARGV vector and each library recognizes it's own options
> and ignores the rest.
> >>
> >> I could strip out the options from ARGV before passing it to PETSc in
> conjunction with "-options_left" but that doesn't give me quite as much
> flexibility as I'd like.  It looks like there are about two dozen or so
> PETSc related options functions in the API but none of them return unused
> options, or otherwise allow me to query whether any particular option was
> recognized or not.  Is this assumption correct?
> >>
> >> Thanks,
> >> Cody
> >
>
>


-- 
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111114/f9b2028b/attachment.htm>