[petsc-users] unsorted local columns in 3.8?

[Hong]

Randy:
It could be a bug or a missing feature in our new MatCreateSubMatrix_MPIAIJ_
SameRowDist().
It would be helpful if you can provide us a simple example that produces
this example.
Hong

I'm running a Fortran code that was just changed over to using petsc 3.8
> (previously petsc 3.7.6). An error was thrown during a KSPSetUp() call. The
> error is "unsorted iscol_local is not implemented yet" (see full error
> below). I tried to trace down the difference in the source files, but where
> the error occurs (MatCreateSubMatrix_MPIAIJ_SameRowDist()) doesn't seem
> to have existed in v3.7.6, so I'm unsure how to compare. It seems the error
> is that the order of the columns locally are unsorted, though I don't think
> I specify a column order in the creation of the matrix:
>      call MatCreate(this%comm,AA,ierr)
>      call MatSetSizes(AA,npetscloc,npetscloc,nreal,nreal,ierr)
>      call MatSetType(AA,MATAIJ,ierr)
>      call MatSetup(AA,ierr)
>      call MatGetOwnershipRange(AA,low,high,ierr)
>      allocate(d_nnz(npetscloc),o_nnz(npetscloc))
>      call getNNZ(grid,npetscloc,low,high,d_nnz,o_nnz,this%xgc_
> petsc,nreal,ierr)
>      call MatSeqAIJSetPreallocation(AA,PETSC_NULL_INTEGER,d_nnz,ierr)
>      call MatMPIAIJSetPreallocation(AA,PETSC_NULL_INTEGER,d_nnz,
> PETSC_NULL_INTEGER,o_nnz,ierr)
>      deallocate(d_nnz,o_nnz)
>      call MatSetOption(AA,MAT_IGNORE_OFF_PROC_ENTRIES,PETSC_TRUE,ierr)
>      call MatSetOption(AA,MAT_KEEP_NONZERO_PATTERN,PETSC_TRUE,ierr)
>      call MatSetup(AA,ierr)
>
>
> [62]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> [62]PETSC ERROR: No support for this operation for this object type
> [62]PETSC ERROR: unsorted iscol_local is not implemented yet
> [62]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html
> for trouble shooting.
> [62]PETSC ERROR: Petsc Release Version 3.8.0, unknown[62]PETSC ERROR: #1
> MatCreateSubMatrix_MPIAIJ_SameRowDist() line 3418 in
> /global/u1/r/rchurchi/petsc/3.8.0/src/mat/impls/aij/mpi/mpiaij.c
> [62]PETSC ERROR: #2 MatCreateSubMatrix_MPIAIJ() line 3247 in
> /global/u1/r/rchurchi/petsc/3.8.0/src/mat/impls/aij/mpi/mpiaij.c
> [62]PETSC ERROR: #3 MatCreateSubMatrix() line 7872 in
> /global/u1/r/rchurchi/petsc/3.8.0/src/mat/interface/matrix.c
> [62]PETSC ERROR: #4 PCGAMGCreateLevel_GAMG() line 383 in
> /global/u1/r/rchurchi/petsc/3.8.0/src/ksp/pc/impls/gamg/gamg.c
> [62]PETSC ERROR: #5 PCSetUp_GAMG() line 561 in
> /global/u1/r/rchurchi/petsc/3.8.0/src/ksp/pc/impls/gamg/gamg.c
> [62]PETSC ERROR: #6 PCSetUp() line 924 in /global/u1/r/rchurchi/petsc/3.
> 8.0/src/ksp/pc/interface/precon.c
> [62]PETSC ERROR: #7 KSPSetUp() line 378 in /global/u1/r/rchurchi/petsc/3.
> 8.0/src/ksp/ksp/interface/itfunc.c
>
> --
> R. Michael Churchill
>
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