[petsc-users] loosing preallocation information

[Jed Brown]

Looks like a memory error. Best bet is to run in Valgrind.

On Mar 7, 2011 5:52 AM, "Alexander Grayver" <agrayver at gfz-potsdam.de> wrote:

 Hi Jed,

It's getting even stranger.

When I run this code under linux I've got error:

[0]PETSC ERROR: --------------------- Error Message
------------------------------------
[0]PETSC ERROR: Argument out of range!
[0]PETSC ERROR: nnz cannot be greater than row length: local row 98 value
1455203639 rowlength 343!
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: Petsc Release Version 3.1.0, Patch 7, Mon Dec 20 14:26:37
CST 2010
[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: /home/mt/agrayver/mt-soft/multiem/INV3D/_tiger/em_model on a
openmpi-i named glic by agrayver Mon Mar  7 14:49:43 2011
[0]PETSC ERROR: Libraries linked from
/panfs/panfs.gfz-hpcc.cluster/home/mt/agrayver/lib/petsc-3.1-p7/openmpi-intel-complex-debug/lib
[0]PETSC ERROR: Configure run at Fri Mar  4 12:43:58 2011
[0]PETSC ERROR: Configure options
--with-petsc-arch=openmpi-intel-complex-debug
--with-mpi-dir=/opt/mpi/intel/openmpi-1.4.2 --with-scalar-type=complex
--with-blas-lapack-dir=/opt/intel/Compiler/11.1/072/mkl/lib/em64t
--with-precision=double --with-x=0
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: MatSeqAIJSetPreallocation_SeqAIJ() line 3003 in
src/mat/impls/aij/seq/aij.c
[0]PETSC ERROR: MatCreateSeqAIJ() line 2906 in src/mat/impls/aij/seq/aij.c


Then I traced it under debugger both on Windows and Linux and realized that
it doesn't crash under Windows only by luck.

The call stack if the folowing:
[C] MatSeqAIJSetPreallocation_SeqAIJ, FP=7fffb4513880
[C] MatCreateSeqAIJ,     FP=7fffb4513900
[C] matcreateseqaij_,    FP=7fffb4513960
[F90] MODELING_MOD`modeling, FP=7fffb4517740

As far as I understand after debugging the problem is that nnz in
MatSeqAIJSetPreallocation isn't 0 and I go through this code:
   if (nnz) {
     for (i=0; i<B->rmap->n; i++) {
       if (nnz[i] < 0) SETERRQ2(PETSC_ERR_ARG_OUTOFRANGE,"nnz cannot be less
than 0: local row %d value %d",i,nnz[i]);
       if (nnz[i] > B->cmap->n) SETERRQ3(PETSC_ERR_ARG_OUTOFRANGE,"nnz
cannot be greater than row length: local row %d value %d rowlength
%d",i,nnz[i],B->cmap->n);
     }
   }

But why is nnz nonzero? I passed PETSC_NULL. It seems like macros
CHKFORTRANNULLINTEGER  in matcreateseqaij_ should set it to zero, but it
doesn't.


Thanks.

On 06.03.2011 16:49, Jed Brown wrote:


>
> On Sun, Mar 6, 2011 at 07:39, Alexander Grayver <agrayver at gfz-potsdam.de>
wrote:
>>
>> Hello,
>...
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