[petsc-users] Rock & Hard Place with SuperLU

[Jed Brown]

Vague "random answers" isn't very helpful. If there is a real problem, we'd
like a test case so we can track it down.


On Mon, Jan 28, 2013 at 3:58 PM, Gaetan Kenway <kenway at utias.utoronto.ca>wrote:

> Hi everyone
>
> I have the exactly same issue actually. When I updated to petsc-3.3,
> SuperLU_dist was giving me random answers to KSPSolve(). Maybe half of the
> time you would get the same result as 3.2, other times it was a little off
> and other times widely differnet. I am using SuperLU_dist with a PREONLY
> ksp object.
>
> I haven't tracked down what is causing it and reverted back to petsc-3.2
> that still works.
>
> Also, to fix the issue with the configure below, just drop out the
> download-metis. You need it for 3.3 but not 3.2
>
> Gaetan
>
>
> On Mon, Jan 28, 2013 at 4:42 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
>
>> Send -ksp_monitor_true_residual -ksp_view output for both cases so we can
>> try to identify the source of the different convergence behavior.
>>
>>
>> On Mon, Jan 28, 2013 at 3:37 PM, Brian Helenbrook <bhelenbr at clarkson.edu>wrote:
>>
>>> Dear Petsc-Users-List,
>>>
>>> I recently upgraded to petsc3.3-p5 from petsc3.2-p7 and the results from
>>> my code have changed.  I am using superLU with the following options:
>>>
>>> -ksp_type preonly -pc_type lu -pc_factor_mat_solver_package superlu_dist
>>>
>>> Everything was working with petsc3.2 but now I get totally different
>>> answers and the iteration doesn't converge.   My build configuration is
>>>
>>> ./config/configure.py --prefix=${HOME}/Packages --with-fortran=0
>>>  --download-superlu_dist=1 --with-x=0 --download-parmetis=1
>>> --download-metis=1 --with-mpi-dir=${HOME}/Packages
>>> --with-valgrind-dir=${HOME}/Packages
>>>
>>> I am running on OS X 10.8.2 with openmpi-1.6.3.
>>>
>>> I have run valgrind on my code and it is clean (except for start-up
>>> issues with mpi which occur before my code is entered.)
>>>
>>> I'm not very sure how to go about debugging this.   What I've tried is
>>> to re-install pets-3.2-p7, but now I am having trouble getting that to
>>> build:
>>>
>>> ./config/configure.py --prefix=${HOME}/Packages --with-fortran=0
>>>  --download-superlu_dist=1 --with-x=0 --download-parmetis=1
>>> --download-metis=1 --with-mpi-dir=${HOME}/Packages
>>> --with-valgrind-dir=${HOME}/Packages
>>>
>>> ===============================================================================
>>>              Configuring PETSc to compile on your system
>>>
>>> ===============================================================================
>>>
>>> ===============================================================================
>>> Compiling & installing Metis; this may take several minutes
>>>
>>> ===============================================================================
>>>
>>>
>>> *******************************************************************************
>>>          UNABLE to CONFIGURE with GIVEN OPTIONS    (see configure.log
>>> for details):
>>>
>>> -------------------------------------------------------------------------------
>>> Error running make on Metis: Could not execute "cd
>>> /Users/bhelenbr/Packages/petsc-3.2-p7/externalpackages/metis-4.0.3 && make
>>> clean && make library && make minstall && make clean":
>>>
>>>
>>> Any ideas what direction to go with this?
>>>
>>> Thanks,
>>>
>>> Brian
>>>
>>>
>>>
>>> Brian Helenbrook
>>> Associate Professor
>>> 362 CAMP
>>> Mech. and Aero. Eng. Dept.
>>> Clarkson University
>>> Potsdam, NY 13699-5725
>>>
>>> work: 315-268-2204
>>> fax: 315-268-6695
>>>
>>>
>>>
>>>
>>
>
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