[petsc-users] Redo PetscOptions From Commandline

[Barry Smith]

On Apr 4, 2013, at 7:42 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> 
> On Thu, Apr 4, 2013 at 7:10 PM, Matthew Knepley <knepley at gmail.com> wrote:
> On Fri, Apr 5, 2013 at 9:53 AM, Derek Gaston <friedmud at gmail.com> wrote:
> On Tue, Apr 2, 2013 at 12:09 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>     You can use PetscGetArgs() followed by by PetscOptionsInsert(). Let us know if you have any troubles with this.
> 
> Hmmm... any chance of getting a version of that function that takes an MPI_Comm?  It is using PETSC_COMM_WORLD implicitly inside it.... and I need to call it asynchronously on sub-communicators.
> 
> I don't think we would put that in the interface since it would allow inconsistencies among options. You can
> call PetscOptionsInsertString() yourself to manage that.

   We don't technically forbid having different options on different communicators but unless you are careful it could be risky.

> 
> Derek, what problem are you trying to solve by resetting the options like this?