possible error error message on "make tests"

[Matthew Knepley]

On Thu, Mar 19, 2009 at 11:24 AM, Ravi Kannan <rxk at cfdrc.com> wrote:

> Hi all,
>        I am having some problems in obtaining speedups for FEM problems; I
> am not sure whether this is a problem related to the way I use MPI or due
> to
> the slow interconnection.
>
>       So I was wondering if there are any sample benchmark FEM problems,
> which are guaranteed to give good speedups.


Different architectures just do not work that way. That is why it is hard.
The idea
of a "good" code does not even make sense. You should run with -log_summary
and then compare to the model you have for your performance.

  Matt


>
> Thanks
> Ravi
>
> -----Original Message-----
> From: petsc-users-bounces at mcs.anl.gov
> [mailto:petsc-users-bounces at mcs.anl.gov]On Behalf Of Toby D. Young
> Sent: Thursday, March 19, 2009 8:31 AM
> To: PETSc users list
> Subject: possible error error message on "make tests"
>
>
>
>
> Hello,
>
> I configure and compile successfully petsc-3.0.0-p3 with:
>  ./config/configure.py  --with-blas-lib=libblas.so
>  --with-lapack-lib=liblapack.so --with-dynamic=1 --with-shared=1
>  --with-mpi=0
> (linux-gnu-c-debug x86_64). I get this worrying "possible error" message
> running the tests.
>
> Running test examples to verify correct installation
> Possible error running C/C++ src/snes/examples/tutorials/ex19 with 1
> MPI process See
> http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html
> ././ex19:
> symbol lookup error: ././ex19: undefined symbol: petsc_tmp_flops
> Possible error running Graphics examples
> src/snes/examples/tutorials/ex19 1 MPI process See
> http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html
> ././ex19:
> symbol lookup error: ././ex19: undefined symbol: petsc_tmp_flops Error
> running Fortran example src/snes/examples/tutorials/ex5f with 1 MPI
> process See
> http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html
> ././ex5f:
> symbol lookup error: ././ex5f: undefined symbol: dmgetlocalvector_
> Completed test examples
>
> I have looked in the documentation and in the troubleshooting guide and
> found nothing. What does this "possible error" mean? ie; can I ignore it
> safely? I am not competent enough to understand why this happens.
>
> Thanks.
>
> Best,
>        Toby
>
> --
>
> Toby D. Young
> Adiunkt (Assistant Professor)
> Philosopher-Physicist
> Department of Computational Science
> Institute of Fundamental Technological Research
> Polish Academy of Sciences
> Room 206, ul. Swietokrzyska 21
> 00-049 Warszawa, Polska
>
> +48 22 826 12 81 ext. 184
> http://rav.ippt.gov.pl/~tyoung <http://rav.ippt.gov.pl/%7Etyoung>
>
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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