[petsc-users] FETI-DP implementation and call sequence

[Matthew Knepley]

Please send your configure.log and make.log

  Thanks,

    Matt


On Fri, Sep 5, 2014 at 4:27 AM, Alp Kalpalp <alpkalpalp at gmail.com> wrote:

> As I said before, I have checked out "master" branch and merged with your
> stefano_zampini/pcbddc-primalfixe branch. configured, compiled successfully.
> I have used --with-pcbddc option in configure as Barry suggested.
>
> However, tests are failed with following reason:
>
> akalpalp at a-kalpalp ~/petsc
> $ make PETSC_DIR=/home/akalpalp/petsc PETSC_ARCH=arch-mswin-c-debug test
> Running test examples to verify correct installation
> Using PETSC_DIR=/home/akalpalp/petsc and PETSC_ARCH=arch-mswin-c-debug
> *******************Error detected during compile or
> link!*******************
> See http://www.mcs.anl.gov/petsc/documentation/faq.html
> /home/akalpalp/petsc/src/snes/examples/tutorials ex19
>
> *********************************************************************************
> /home/akalpalp/petsc/arch-mswin-c-debug/bin/mpicc -o ex19.o -c -Wall
> -Wwrite-strings -Wno-strict-aliasing -Wno-unknown-pragmas -g3 -O0
> -I/home/akalpalp/petsc/include
> -I/home/akalpalp/petsc/arch-mswin-c-debug/include    `pwd`/ex19.c
> /home/akalpalp/petsc/arch-mswin-c-debug/bin/mpicc -Wall -Wwrite-strings
> -Wno-strict-aliasing -Wno-unknown-pragmas -g3 -O0  -o ex19  ex19.o
> -L/home/akalpalp/petsc/arch-mswin-c-debug/lib  -lpetsc
> -Wl,-rpath,/home/akalpalp/petsc/arch-mswin-c-debug/lib -lf2clapack
> -lf2cblas -lpthread -lgdi32 -luser32 -ladvapi32 -lkernel32 -ldl
> /home/akalpalp/petsc/arch-mswin-c-debug/lib/libpetsc.a(pcregis.o):pcregis.c:(.rdata$.refptr.PCCreate_BDDC[.refptr.PCCreate_BDDC]+0x0):
> undefined reference to `PCCreate_BDDC'
> collect2: error: ld returned 1 exit status
> makefile:108: recipe for target 'ex19' failed
> make[3]: [ex19] Error 1 (ignored)
> /usr/bin/rm -f ex19.o
> Completed test examples
> =========================================
> Now to evaluate the computer systems you plan use - do:
> make PETSC_DIR=/home/akalpalp/petsc PETSC_ARCH=arch-mswin-c-debug streams
> NPMAX=<number of MPI processes you intend to use>
>
>
>
> On Thu, Sep 4, 2014 at 5:37 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>>
>>    This is likely due to the horrible horrible fact that some of the bddc
>> files only get compiled if ./configure is run with the option --with-pcbddc
>> you will need to rerun ./configure and then make with that option.
>>
>>    I pray that someone removes that horrible confusing configure option.
>>
>>    Barry
>>
>> On Sep 4, 2014, at 8:52 AM, Alp Kalpalp <alpkalpalp at gmail.com> wrote:
>>
>> > Dear Stefano,
>> >
>> > I have checked out "master" branch and merged with your
>> stefano_zampini/pcbddc-primalfixe branch. configured, compiled and all
>> tests are completed successfully.
>> > Then, I tried to compile ex59 with make ex59, it results in unresolved
>> external error. I believe your bddc_feti files are not included in
>> compilation.
>> > Since I am not experienced on how to solve issues in Petsc, I need to
>> ask several questions;
>> >
>> > 1-) Are there any global settings to add additonal directories to
>> compilation  (src\ksp\pc\impls\bddc)
>> > 2-) or should I include these files on top of ex59 (AFAIK, including .c
>> files is not a good thing)
>> > 3-) and finally what is the better way of helping you (creating another
>> branch from yours or what)
>> >
>> > Thanks in advance
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Wed, Sep 3, 2014 at 6:18 PM, Stefano Zampini <
>> stefano.zampini at gmail.com> wrote:
>> > FETIDP is in PETSc as a byproduct of the BDDC preconditioner (one is
>> the dual of the other) and it does not have its own classes so far.
>> >
>> > That said, you can experiment with FETI-DP only after having setup a
>> BDDC preconditioner with the options and customization you prefer.
>> > Use
>> http://www.mcs.anl.gov/petsc/petsc-dev/docs/manualpages/KSP/index.html
>> for manual pages.
>> >
>> > For an 'how to' with FETIDP, please see
>> src/ksp/ksp/examples/tutorials/ex.59.c as Jed told you, specifically look
>> at ComputeKSPFETIDP for obtaining the FETIDP matrix F (implemented
>> Matrix-free) and the optimal FETIDP dirichlet preconditioner. Once you have
>> F, you can use PCBDDCMatFETIDPGetRHS and PCBDDCMatFetiDPGetSolution to
>> obtain a right-hand side for the FETIDP system and a physical solution from
>> the solution of the FETIDP system.
>> >
>> > I would recommend you to use the development version of the library and
>> either use the ‘next’ branch or the ‘master' branch after having merged in
>> the branch stefano_zampini/pcbddc-primalfixes. Note that ‘next’ also
>> contains the new deluxe scaling operator for BDDC which is not available to
>> use with FETI-DP.
>> >
>> > If you have any other questions which can be useful for other PETSc
>> users, please use the mailing list; otherwise you can contact me personally.
>> >
>> > Stefano
>> >
>> >
>> > On Sep 3, 2014, at 5:19 PM, Jed Brown <jed at jedbrown.org> wrote:
>> >
>> >> Matthew Knepley <knepley at gmail.com> writes:
>> >>>> 1- Is it possible to complete a FETI-DP solution with the provided
>> >>>> functions in current PetSc release?
>> >>>>
>> >>>
>> >>> There is no FETI-DP in PETSc.
>> >>
>> >> Wrong.  There is PCBDDC, which has the same eigenvalues as FETI-DP.
>> You
>> >> can enable it by configuring --with-pcbddc.  This will be turned on by
>> >> default soon.  It is fairly new, so you should use the branch 'master'
>> >> instead of the release.  It has an option to do FETI-DP instead of
>> BDDC.
>> >> See src/ksp/ksp/examples/tutorials/ex59.c.
>> >>
>> >> For either of these methods, you have to assemble a MATIS.  If you use
>> >> MatSetValuesLocal, most of your assembly code can stay the same.
>> >>
>> >> Hopefully we can get better examples before the next release.  Stefano
>> >> (the author of PCBDDC, Cc'd) tests mostly with external packages, but
>> we
>> >> really need more complete tests within PETSc.
>> >
>> >
>>
>>
>


-- 
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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