[petsc-dev] [petsc-users] MatSetBlockSize no longer works after MatCreateSeqAIJ

[Barry Smith]

On Jun 13, 2012, at 8:03 PM, Jed Brown wrote:

> 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?

    To break less stuff and not make most people change their MatCreateMPIAIJ call()

> Wasn't there a discussion about adding it?

   Yes

|   What should we do?

   Get rid of convenience constructors?

  Barry

   
> 
> 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
>