[petsc-users] about ILUT preconditioner

[Matthew Knepley]

On Mon, Oct 3, 2011 at 8:25 AM, behzad baghapour <behzad.baghapour at gmail.com
> wrote:

> Many thanks.
>
> I have a basic (dummy) question here...Does downloading external packages
> like blas,lapack, hypre with Petsc command make them usable for other codes
> as linked libraries or is just for use of Petsc?
>

They are installed into $PETSC_DIR/$PETSC_ARCH so you could use them from
there.

   Matt


> On Mon, Oct 3, 2011 at 4:24 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>>
>> On Oct 3, 2011, at 3:55 AM, behzad baghapour wrote:
>>
>> > Is it necessary to download and link SPARSEKIT with Petsc to use ILUT
>> (with threshold) as a preconditioner? If so, is it correct to configure
>> Petsc with
>> > --download-sparsekit in this matter?
>> >
>>
>>     We removed the interface to sparsekit a long time ago, because it
>> wasn't very good.
>>
>>    If you want to use ILUT you can use --download-hypre then run with
>> -pc_type boomeramg -pc_hypre_type pilut
>>
>>    See
>> http://www.mcs.anl.gov/petsc/petsc-as/snapshots/petsc-dev/docs/manualpages/PC/PCHYPRE.htmlfor more details and run the PETSc program with the above options and -help
>> to see the various pilut options.
>>
>>    Barry
>>
>>
>> > --
>> > ==================================
>> > Behzad Baghapour
>> > Ph.D. Candidate, Mechecanical Engineering
>> > University of Tehran, Tehran, Iran
>> > https://sites.google.com/site/behzadbaghapour
>> > Fax: 0098-21-88020741
>> > ==================================
>> >
>>
>>
>
>
> --
> ==================================
> Behzad Baghapour
> Ph.D. Candidate, Mechecanical Engineering
> University of Tehran, Tehran, Iran
> https://sites.google.com/site/behzadbaghapour
> Fax: 0098-21-88020741
> ==================================
>
>


-- 
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
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