[petsc-users] MatSetBlockSize no longer works after MatCreateSeqAIJ

[Jed Brown]

What I do is

MatCreate(comm,&A);
MatSetSizes(A,...);
MatSetBlockSize(A,bs);
MatSetOptionsPrefix(A,"yourchoice_");
MatSetFromOptions(A);
MatXAIJSetPreallocation(A,...);

This should work with any matrix type, parallel and sequential, and you can
specify it without interfering with any other matrices using
-yourchoice_mat_type aij {baij, sbaij}.


Devs, is there a reason that block size wasn't added to the convenience
constructor? Wasn't there a discussion about adding it?

On Wed, Jun 13, 2012 at 7:55 PM, Geoffrey Irving <irving at naml.us> wrote:

> Hello,
>
> The following code used to work, but breaks after upgrading to 3.3:
>
>    ....
>    CHECK(MatCreateSeqAIJ(comm,3*n,3*n,0,scalar_view(nnz).data(),&mat));
>    CHECK(MatSetBlockSize(mat,3));
>    ...
>
> The error follows.  Presumably MatSetBlockSize got more strict, and I
> need to break the single MatCreateSeqAIJ into multiple lines (matrix
> creation followed by preallocation) in order to insert MatSetBlockSize
> in the middle.  What are the correct functions to call?
>
> Thanks,
> Geoffrey
>
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------
> [0]PETSC ERROR: Arguments are incompatible!
> [0]PETSC ERROR: Cannot change block size 1 to 3!
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.3.0, Patch 0, Tue Jun  5
> 14:20:42 CDT 2012
> [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: Unknown Name on a darwin named tile.local by irving
> Wed Jun 13 17:51:34 2012
> [0]PETSC ERROR: Libraries linked from
>
> /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_petsc/petsc/work/destroot/opt/local/lib/petsc/lib
> [0]PETSC ERROR: Configure run at Wed Jun 13 12:11:05 2012
> [0]PETSC ERROR: Configure options --prefix=/opt/local --with-python
> --with-debugging=0 --with-c-support=1 --with-c++-support=1
> --with-pic=fPIC --with-shared-libraries=0 --with-mpi=1
> --PETSC_ARCH=darwin
>
> --prefix=/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_petsc/petsc/work/destroot/opt/local/lib/petsc
> --with-cc=/opt/local/bin/openmpicc
> --with-cxx=/opt/local/bin/openmpicxx
> --with-mpiexec=/opt/local/bin/openmpiexec
> --with-lapack-lib=/usr/lib/liblapack.dylib
> --with-blas-lib=/usr/lib/libblas.dylib --download-umfpack=1
> --download-ml --download-metis --download-parmetis --download-blacs
> --download-scalapack --download-mumps --download-ptscotch
> --with-fc=/opt/local/bin/openmpif90 --LIBS=-lstdc++
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: PetscLayoutSetBlockSize() line 460 in
>
> /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_petsc/petsc/work/petsc-3.3-p0/src/vec/vec/impls/mpi/pmap.c
> [0]PETSC ERROR: MatSetBlockSize() line 6691 in
>
> /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_petsc/petsc/work/petsc-3.3-p0/src/mat/interface/matrix.c
> [0]PETSC ERROR: --------------------- Error Message
> ------------------------------------
> [0]PETSC ERROR: Arguments are incompatible!
> [0]PETSC ERROR:  !
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: Petsc Release Version 3.3.0, Patch 0, Tue Jun  5
> 14:20:42 CDT 2012
> [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: Unknown Name on a darwin named tile.local by irving
> Wed Jun 13 17:51:34 2012
> [0]PETSC ERROR: Libraries linked from
>
> /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_petsc/petsc/work/destroot/opt/local/lib/petsc/lib
> [0]PETSC ERROR: Configure run at Wed Jun 13 12:11:05 2012
> [0]PETSC ERROR: Configure options --prefix=/opt/local --with-python
> --with-debugging=0 --with-c-support=1 --with-c++-support=1
> --with-pic=fPIC --with-shared-libraries=0 --with-mpi=1
> --PETSC_ARCH=darwin
>
> --prefix=/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_petsc/petsc/work/destroot/opt/local/lib/petsc
> --with-cc=/opt/local/bin/openmpicc
> --with-cxx=/opt/local/bin/openmpicxx
> --with-mpiexec=/opt/local/bin/openmpiexec
> --with-lapack-lib=/usr/lib/liblapack.dylib
> --with-blas-lib=/usr/lib/libblas.dylib --download-umfpack=1
> --download-ml --download-metis --download-parmetis --download-blacs
> --download-scalapack --download-mumps --download-ptscotch
> --with-fc=/opt/local/bin/openmpif90 --LIBS=-lstdc++
> [0]PETSC ERROR:
> ------------------------------------------------------------------------
> [0]PETSC ERROR: PetscSolidMat() line 114 in petsc/ksp.cpp
>
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