dolfin team mailing list archive

["Alessio Quaglino" <alessio@xxxxxx>]

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.

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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