[petsc-users] Rock & Hard Place with SuperLU

[Sanjay Govindjee]

I have seen similar behavior on my mac (works fine on Linux) -- I 
reported this to the mailing list a few weeks back.   I eventually 
tracked it down to a BLAS issue but gave up on finding the exact cause 
as I needed to move on -- moved over to MUMPS.   But the problem is not 
in your imagination.

If I have the time, I will try to get back to it (especially since I 
finally learned that you have to use dsymutil to get the line numbers in 
the debugger/valgrind).

-sanjay



On 1/28/13 3:09 PM, Jed Brown wrote:
> 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 <mailto: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
>     <mailto: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 <mailto: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 <tel:315-268-2204>
>             fax: 315-268-6695 <tel:315-268-6695>
>
>
>
>
>
>

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