[petsc-users] unsorted local columns in 3.8?

[Hong]

Randy:
Thanks, I'll check it tomorrow.
Hong

> OK, this might not be completely satisfactory, because it doesn't show the
> partitioning or how the matrix is created, but this reproduces the problem.
> I wrote out my matrix, Amat, from the larger simulation, and load it in
> this script. This must be run with MPI rank greater than 1. This may be
> some combination of my petsc.rc, because when I use the PetscInitialize
> with it, it throws the error, but when using default (PETSC_NULL_CHARACTER)
> it runs fine.
>
>
> On Tue, Oct 31, 2017 at 9:58 AM, Hong <hzhang at mcs.anl.gov> wrote:
>
>> 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,nr
>>> eal,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
>>>
>>
>>
>
>
> --
> R. Michael Churchill
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20171101/c5342f66/attachment.html>