[petsc-users] SLEPc Eigenvalue problem - Zero Pivot

[venkatesh g]

Ok, I followed this process and compiled ex7 successfully.

Now I give the command: './ex7 -f1 A11 -f2 B11 -eps_nev 4 -eps_target 0.5
-st_type sinvert'

The error is the zero pivot problem:

 Reading COMPLEX matrices from binary files...
[0]PETSC ERROR: --------------------- Error Message
------------------------------------
[0]PETSC ERROR: Detected zero pivot in LU factorization:
see http://www.mcs.anl.gov/petsc/documentation/faq.html#ZeroPivot!
[0]PETSC ERROR: Zero pivot row 420 value 0 tolerance 2.22045e-14!
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: Petsc Release Version 3.3.0, Patch 7, Sat May 11 22:15:24
CDT 2013
[0]PETSC ERROR: See docs/changes/index.html for recent updates.
[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[0]PETSC ERROR: See docs/index.html for manual pages.
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: ./ex7 on a linux-gnu named earth.ceas.iisc.ernet.in by
venkatesh Fri May 15 17:07:02 2015
[0]PETSC ERROR: Libraries linked from
/cluster/share/venkatesh/petsc-3.3-p7/linux-gnu-intel-cmplx-batch/lib
[0]PETSC ERROR: Configure run at Fri May 15 15:10:57 2015
[0]PETSC ERROR: Configure options --with-cc=gcc --with-fc=ifort
--with-blas-lapack-dir=/opt/intel/composer_xe_2013.5.192/mkl/lib/intel64
--download-mpich=/cluster/share/apps/mpich2-1.4.1p1.tar.gz
--download-mumps=/cluster/share/apps/MUMPS_4.10.0-p3.tar.gz
--download-scalapack=/cluster/share/apps/SCALAPACK-1.7.tar.gz
--download-blacs=/cluster/share/apps/blacs-dev.tar.gz
--download-parmetis=/cluster/share/apps/parmetis-4.0.2-p3.tar.gz
--download-metis=/cluster/share/apps/metis-5.0.2-p3.tar.gz
--download-cmake=/cluster/share/apps/cmake-2.8.7.tar.gz
--with-scalar-type=complex --with-fortran-kernels=generic
--with-large-file-io=1
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: MatPivotCheck_none() line 583 in
/cluster/share/venkatesh/petsc-3.3-p7/include/petsc-private/matimpl.h
[0]PETSC ERROR: MatPivotCheck() line 602 in
/cluster/share/venkatesh/petsc-3.3-p7/include/petsc-private/matimpl.h
[0]PETSC ERROR: MatLUFactorNumeric_SeqAIJ() line 570 in
/cluster/share/venkatesh/petsc-3.3-p7/src/mat/impls/aij/seq/aijfact.c
[0]PETSC ERROR: MatLUFactorNumeric() line 2803 in
/cluster/share/venkatesh/petsc-3.3-p7/src/mat/interface/matrix.c
[0]PETSC ERROR: PCSetUp_LU() line 160 in
/cluster/share/venkatesh/petsc-3.3-p7/src/ksp/pc/impls/factor/lu/lu.c
[0]PETSC ERROR: PCSetUp() line 832 in
/cluster/share/venkatesh/petsc-3.3-p7/src/ksp/pc/interface/precon.c
[0]PETSC ERROR: KSPSetUp() line 278 in
/cluster/share/venkatesh/petsc-3.3-p7/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: PCSetUp_Redundant() line 176 in
/cluster/share/venkatesh/petsc-3.3-p7/src/ksp/pc/impls/redundant/redundant.c
[0]PETSC ERROR: PCSetUp() line 832 in
/cluster/share/venkatesh/petsc-3.3-p7/src/ksp/pc/interface/precon.c
[0]PETSC ERROR: KSPSetUp() line 278 in
/cluster/share/venkatesh/petsc-3.3-p7/src/ksp/ksp/interface/itfunc.c
[0]PETSC ERROR: STSetUp_Sinvert() line 153 in
/cluster/share/venkatesh/petsc-3.3-p7/slepc-3.3-p4/src/st/impls/sinvert/sinvert.c
[0]PETSC ERROR: STSetUp() line 280 in
/cluster/share/venkatesh/petsc-3.3-p7/slepc-3.3-p4/src/st/interface/stsolve.c
[0]PETSC ERROR: EPSSetUp() line 204 in
/cluster/share/venkatesh/petsc-3.3-p7/slepc-3.3-p4/src/eps/interface/setup.c
[0]PETSC ERROR: EPSSolve() line 109 in
/cluster/share/venkatesh/petsc-3.3-p7/slepc-3.3-p4/src/eps/interface/solve.c
[0]PETSC ERROR: main() line 148 in ex7.c
application called MPI_Abort(MPI_COMM_WORLD, 71) - process 0
[unset]: aborting job:
application called MPI_Abort(MPI_COMM_WORLD, 71) - process 0

Venkatesh

On Fri, May 15, 2015 at 4:22 PM, Jose E. Roman <jroman at dsic.upv.es> wrote:

>
> El 15/05/2015, a las 12:49, venkatesh g escribió:
>
> > Hi,
> > 'make test' was successful on the $PETSC_DIR.
> > I configured MUMPS, metis, parmetis, scalapack through
> '--download-mumps=/path/MUMPS_4.10.0-p3.tar.gz' and etc..
> >
> > I will anyway download the new version and start installing it now., Is
> it due to some flag issue ? I have attached my makefile.
> >
> > Venkatesh
> >
>
> You must link with all libraries, otherwise you will get undefined
> symbols. The easiest way is to include PETSc and SLEPc makefile
> definitions. See for instance section 1.4.2 of SLEPc's users manual.
>
> Jose
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20150515/24ecff0b/attachment-0001.html>