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Alessio Quaglino wrote:
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. AndyOk 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_*.
No, dl and di relate to the type of integer used. On 32 bit machines there is no difference. Either you haven't compiled UMFPACK correctly, or DOLFIN is linking to another UMFPACK library. Check that you're DOLFIN executable is linked to the correct UMFPACK library by examining the compiler linking flags and using ldd on the executable.
Garth
Thanks for the help. Alessioso I suspect that my UMFPACK and dolfin are not linked properly. I'm using UMFPACK 4.4 and uBlas. Has anyone experienced something similar? AlessioI 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 _______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@xxxxxxxxxx http://www.fenics.org/mailman/listinfo/dolfin-dev_______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@xxxxxxxxxx http://www.fenics.org/mailman/listinfo/dolfin-dev_______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@xxxxxxxxxx http://www.fenics.org/mailman/listinfo/dolfin-dev-- ==================== Andy Terrel Computer Science Dept University of Chicago aterrel@xxxxxxxxxxxx --------------------- Men are equal; it is not birth but virtue that makes the difference. -Voltaire _______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@xxxxxxxxxx http://www.fenics.org/mailman/listinfo/dolfin-dev_______________________________________________ DOLFIN-dev mailing list DOLFIN-dev@xxxxxxxxxx http://www.fenics.org/mailman/listinfo/dolfin-dev
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