understanding the output from -info

[Ben Tay]

ops.... it worked for ex2 and ex2f  ;-)

so what could be wrong? is there some commands or subroutine which i must
call? btw, i'm programming in fortran.

thank you.


On 2/9/07, Matthew Knepley <knepley at gmail.com> wrote:
>
> Problems do not go away by ignoring them. Something is wrong here, and it
> may
> affect the rest of your program. Please try to run an example:
>
>   cd src/ksp/ksp/examples/tutorials
>   make ex2
>   ./ex2 -log_summary
>
>      Matt
>
> On 2/9/07, Ben Tay <zonexo at gmail.com> wrote:
> >
> > Well, I don't know what's wrong. I did the same thing for -info and it
> > worked. Anyway, is there any other way?
> >
> > Like I can use -mat_view or call matview( ... ) to view a matrix. Is
> > there a similar subroutine for me to call?
> >
> > Thank you.
> >
> >
> >  On 2/9/07, Matthew Knepley <knepley at gmail.com > wrote:
> > >
> > > Impossible, please check the spelling, and make sure your
> > > command line was not truncated.
> > >
> > >   Matt
> > >
> > > On 2/9/07, Ben Tay < zonexo at gmail.com> wrote:
> > > >
> > > > ya, i did use -log_summary. but no output.....
> > > >
> > > > On 2/9/07, Barry Smith <bsmith at mcs.anl.gov> wrote:
> > > > >
> > > > >
> > > > > -log_summary
> > > > >
> > > > >
> > > > > On Fri, 9 Feb 2007, Ben Tay wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > I've tried to use log_summary but nothing came out? Did I miss
> > > > > out
> > > > > > something? It worked when I used -info...
> > > > > >
> > > > > >
> > > > > > On 2/9/07, Lisandro Dalcin <dalcinl at gmail.com > wrote:
> > > > > > >
> > > > > > > On 2/8/07, Ben Tay < zonexo at gmail.com> wrote:
> > > > > > > > i'm trying to solve my cfd code using PETSc in parallel.
> > > > > Besides the
> > > > > > > linear
> > > > > > > > eqns for PETSc, other parts of the code has also been
> > > > > parallelized using
> > > > > > > > MPI.
> > > > > > >
> > > > > > > Finite elements or finite differences, or what?
> > > > > > >
> > > > > > > > however i find that the parallel version of the code running
> > > > > on 4
> > > > > > > processors
> > > > > > > > is even slower than the sequential version.
> > > > > > >
> > > > > > > Can you monitor the convergence and iteration count of
> > > > > momentum and
> > > > > > > poisson steps?
> > > > > > >
> > > > > > >
> > > > > > > > in order to find out why, i've used the -info option to
> > > > > print out the
> > > > > > > > details. there are 2 linear equations being solved -
> > > > > momentum and
> > > > > > > poisson.
> > > > > > > > the momentum one is twice the size of the poisson. it is
> > > > > shown below:
> > > > > > >
> > > > > > > Can you use -log_summary command line option and send the
> > > > > output attached?
> > > > > > >
> > > > > > > > i saw some statements stating "seq". am i running in
> > > > > sequential or
> > > > > > > parallel
> > > > > > > > mode? have i preallocated too much space?
> > > > > > >
> > > > > > > It seems you are running in parallel. The "Seq" are related to
> > > > > local,
> > > > > > > internal objects. In PETSc, parallel matrices have inner
> > > > > sequential
> > > > > > > matrices.
> > > > > > >
> > > > > > > > lastly, if Ax=b, A_sta and A_end from  MatGetOwnershipRange
> > > > > and b_sta
> > > > > > > and
> > > > > > > > b_end from VecGetOwnershipRange should always be the same
> > > > > value, right?
> > > > > > >
> > > > > > > I should. If not, you are likely going to get an runtime
> > > > > error.
> > > > > > >
> > > > > > > Regards,
> > > > > > >
> > > > > > > --
> > > > > > > Lisandro Dalcín
> > > > > > > ---------------
> > > > > > > Centro Internacional de Métodos Computacionales en Ingeniería
> > > > > (CIMEC)
> > > > > > > Instituto de Desarrollo Tecnológico para la Industria Química
> > > > > (INTEC)
> > > > > > > Consejo Nacional de Investigaciones Científicas y Técnicas
> > > > > (CONICET)
> > > > > > > PTLC - Güemes 3450, (3000) Santa Fe, Argentina
> > > > > > > Tel/Fax: +54-(0)342-451.1594
> > > > > > >
> > > > > > >
> > > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > > --
> > > One trouble is that despite this system, anyone who reads journals
> > > widely
> > > and critically is forced to realize that there are scarcely any bars
> > > to eventual
> > > publication. There seems to be no study too fragmented, no hypothesis
> > > too
> > > trivial, no literature citation too biased or too egotistical, no
> > > design too
> > > warped, no methodology too bungled, no presentation of results too
> > > inaccurate, too obscure, and too contradictory, no analysis too
> > > self-serving,
> > > no argument too circular, no conclusions too trifling or too
> > > unjustified, and
> > > no grammar and syntax too offensive for a paper to end up in print. --
> > > Drummond Rennie
> >
> >
> >
>
>
> --
> One trouble is that despite this system, anyone who reads journals widely
> and critically is forced to realize that there are scarcely any bars to
> eventual
> publication. There seems to be no study too fragmented, no hypothesis too
> trivial, no literature citation too biased or too egotistical, no design
> too
> warped, no methodology too bungled, no presentation of results too
> inaccurate, too obscure, and too contradictory, no analysis too
> self-serving,
> no argument too circular, no conclusions too trifling or too unjustified,
> and
> no grammar and syntax too offensive for a paper to end up in print. --
> Drummond Rennie
>
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