dolfin team mailing list archive

["Alessio Quaglino" <alessio@xxxxxx>]

> Alessio Quaglino wrote:
>> Yes, I link dolfin and my code with -pg but not dolfin and UMFPACK,
>> hence
>> I guess I must use tic() and toc() in order to time the LU
>> factorization.
>>
>> There is another problem with UMFPACK, it seems that with all the
>> default
>> values the call:
>>
>> umfpack_dl_numeric( (const long int*) Rp, (const long int*) Ri, Rx,
>> Symbolic, &Numeric, control, info);
>> control[UMFPACK_PRL] = 2;
>> umfpack_dl_report_info(control, info);
>>
>> returns, in particular, the following:
>>
>> BLAS library used:  none.  UMFPACK will be slow.
>>
> This is because your UMFPACK was built without BLAS. In order to make
> UMFPACK more portable this is the default, you have to edit the
> UMFPACKv4.4/UMFPACK/Make/Make.<arch> and
> UMFPACKv4.4/AMD/Make/Make.<arch> files to compile with a BLAS library.
> Dolfin can link to UMFPACK like this just fine, it just has timing
> implications.
>
> Andy

Ok I see. The problem is that I've used the Debian repositories in order
to install UMFPACK. I've thus remove the UMFPACK package and downloaded
the code (again version 4.4 to avoid conflicts) from its website. I had to
install the UBLAS ATLAS Debian packages and then I could compile with the
options:

3: with Fortran interface to the ATLAS BLAS
CONFIG =
LIB = -lf77blas -latlas -lfrtbegin -lg2c -lm

then I configured dolfin with:

./configure --disable-pydolfin
--with-amd-lib=/home/alessio/FEniCS/UMFPACKv4.4/AMD/Lib/
--with-umfpack-lib=/home/alessio/FEniCS/UMFPACKv4.4/UMFPACK/Lib/
--with-umfpack-include=/home/alessio/FEniCS/UMFPACKv4.4/UMFPACK/Include/

I recompiled dolfin and my code, but I still obtain the message:

BLAS library used: none.  UMFPACK will be slow.

can the problem be related to the call of umfpack_dl_* functions? It seems
that UMFPACK demos use BLAS for umfpack_di_* but not fot umfpack_dl_*.
Thanks for the help.

Alessio


>> so I suspect that my UMFPACK and dolfin are not linked properly. I'm
>> using
>> UMFPACK 4.4 and uBlas. Has anyone experienced something similar?
>>
>> Alessio
>>
>>
>>
>>> I don't have alot of experiance with gprof, nor am I familiar with
>>> UMFPACK.
>>> But code that isn't compiled AND linked with -pg are ignored by the
>>> profiler.
>>> Maybe the functions you mention that are ignored aren't compiled and
>>> linked with
>>> -pg?
>>>
>>>
>>>> I'm trying to profile my code using gprof adding -gp to the flags when
>>>> compiling. However it seems that the functions called by UMFPACK are
>>>> completely ignored. Is there a solution to include them or should I
>>>> use
>>>> another profiling tool? Thanks.
>>>>
>>>> Regards,
>>>> Alessio Quaglino
>>>>
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>>
>>
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>
>
> --
>
> ====================
> Andy Terrel
> Computer Science Dept
> University of Chicago
> aterrel@xxxxxxxxxxxx
> ---------------------
>
> Men are equal;
> it is not birth but virtue that makes the difference.
>                                             -Voltaire
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