[petsc-users] MatMatMult size error

[Jim Fonseca]

Hi Hong,
It's been a while but we have found that moving to PETSc3.4 solved this
problem with MatMatMult() in PETSc3.3p5.
Thanks,
Jim


On Tue, Jan 15, 2013 at 4:43 PM, Hong Zhang <hzhang at mcs.anl.gov> wrote:

> Jim :
> Can you switch to petsc-dev? MatMatMult()
> has been updated significantly in petsc-dev
> If you still see problem in petsc-dev, send us a short code that
> produce the error. We'll check it.
>
> Hong
>
> > Hi,
> > We are in the process of upgrading from Petsc 3.2 to 3.3p5.
> >
> > We are creating  matrices A and B in this way.
> >       petsc_matrix = new Mat;
> >       ierr = MatCreateDense(comm, m, num_cols ,num_rows,num_cols,data,A);
> >
> > Elsewhere, we have this. It gets called a few times, and on the 4th time,
> > the size of matrix is C is wrong. Please see the output below. What
> could be
> > the problem?
> >      C = new Mat;
> >      double fill = PETSC_DEFAULT;
> >      MatMatMult(A,B,MAT_INITIAL_MATRIX, fill, C);
> >      {
> >        int m,n;
> >        MatGetOwnershipRange(A, &m, &n);
> >        cerr << "A.m = " <<  m << "\n";
> >        cerr << "A.n = " <<  n << "\n";
> >        MatGetSize(A,&m,&n);
> >        cerr << "A global rows = " <<  m << "\n";
> >        cerr << "A global cols = " <<  n << "\n";
> >
> >        MatGetOwnershipRange(B, &m, &n);
> >        cerr << "B.m = " <<  m << "\n";
> >        cerr << "B.n = " <<  n << "\n";
> >        MatGetSize(B,&m,&n);
> >        cerr << "B global rows = " <<  m << "\n";
> >        cerr << "B global cols = " <<  n << "\n";
> >
> >        MatGetOwnershipRange(*C, &m, &n);
> >        cerr << "C.m = " <<  m << "\n";
> >        cerr << "C.n = " <<  n << "\n";
> >
> >        MatGetSize(*C,&m,&n);
> >        cerr << "C global rows = " <<  m << "\n";
> >        cerr << "C global cols = " <<  n << "\n";
> >
> >      }
> >
> > A.m = 0
> > A.n = 59
> > A global rows = 59
> > A global cols = 320
> > B.m = 0
> > B.n = 320
> > B global rows = 320
> > B global cols = 320
> > C.m = 0
> > C.n = 59
> > C global rows = 59
> > C global cols = 320
> > A.m = 0
> > A.n = 59
> > A global rows = 59
> > A global cols = 320
> > B.m = 0
> > B.n = 320
> > B global rows = 320
> > B global cols = 59
> > C.m = 10922
> > C.n = -1389327096
> > C global rows = -1389327112
> > C global cols = -1389327112
> >
> >
> > Thanks,
> > Jim
> > --
> > Jim Fonseca, PhD
> > Research Scientist
> > Network for Computational Nanotechnology
> > Purdue University
> > 765-496-6495
> > www.jimfonseca.com
> >
> >
>



-- 
Jim Fonseca, PhD
Research Scientist
Network for Computational Nanotechnology
Purdue University
765-496-6495
www.jimfonseca.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20130619/64a767e2/attachment.html>