http://matrixprogramming.com/2010/08/blas-basic-linear-algebra-system

I’m trying to install umfpack on my Windows machine, and the download link for the precompiled atlas doesn’t seem to include libg2c.a – any idea where I could find it?

Thanks!
M

I have downloaded a precompiled version of ATLAS for LINUX and now it compiles perfectly !

It is only a 5% faster than without BLAS … at least it was worth the try !

Thanks for all your help.

Néstor.

nm libf77blas.a | grep -i dgemm

it prints in screen …

————————————————————

nm: srotg.o: File format not recognized
nm: srotmg.o: File format not recognized
nm: sscal.o: File format not recognized
nm: snrm2.o: File format not recognized
nm: sasum.o: File format not recognized
nm: isamax.o: File format not recognized
nm: saxpy.o: File format not recognized
nm: scopy.o: File format not recognized
nm: sswap.o: File format not recognized
nm: srot.o: File format not recognized
nm: srotm.o: File format not recognized
nm: sdot.o: File format not recognized
nm: dsdot.o: File format not recognized
nm: sdsdot.o: File format not recognized
nm: ATL_F77wrap_srotg.o: File format not recognized
nm: ATL_F77wrap_srotmg.o: File format not recognized
nm: ATL_F77wrap_sscal.o: File format not recognized
nm: ATL_F77wrap_snrm2.o: File format not recognized
nm: ATL_F77wrap_sasum.o: File format not recognized
nm: ATL_F77wrap_isamax.o: File format not recognized
nm: ATL_F77wrap_saxpy.o: File format not recognized
nm: ATL_F77wrap_scopy.o: File format not recognized
nm: ATL_F77wrap_sswap.o: File format not recognized
nm: ATL_F77wrap_srot.o: File format not recognized
nm: ATL_F77wrap_srotm.o: File format not recognized
nm: ATL_F77wrap_sdot.o: File format not recognized
nm: ATL_F77wrap_dsdot.o: File format not recognized
nm: ATL_F77wrap_sdsdot.o: File format not recognized

————————————————————

and it keeps going with many other files, I think it does not reconize even one of the files.

What does it mean ???

Thank you in advance.

Néstor.

nm libf77blas.a | grep -i dgemm

to see what functions are there.

Now i am trying to compile UMFPACK with ATLAS in a UNIX cluster and I have the same problem as before with the solaris machine …

The path to blas I set it to: BLAS = -L ../../lib/windows -lf77blas -latlas -lg2c

————————————————————

The error messages I get are:

icc -O3 -I../Include -I../../AMD/Include -I../../UFconfig -o umfpack_di_demo umfpack_di_demo.c ../Lib/libumfpack.a ../../AMD/Lib/libamd.a -L ../../lib/windows -lf77blas -latlas -lg2c -lm
umfpack_di_demo.c(96): (col. 5) remark: LOOP WAS VECTORIZED.
../Lib/libumfpack.a(umf_di_local_search.o)(.text+0x6ea): In function `umfdi_local_search’:
: undefined reference to `dtrsv_’
../Lib/libumfpack.a(umf_di_local_search.o)(.text+0x9cf): In function `umfdi_local_search’:
: undefined reference to `dgemv_’
../Lib/libumfpack.a(umf_di_blas3_update.o)(.text+0xf0): In function `umfdi_blas3_update’:
: undefined reference to `dtrsm_’
../Lib/libumfpack.a(umf_di_blas3_update.o)(.text+0x18c): In function `umfdi_blas3_update’:
: undefined reference to `dgemm_’
../Lib/libumfpack.a(umf_di_blas3_update.o)(.text+0x1fe): In function `umfdi_blas3_update’:
: undefined reference to `dger_’
make[1]: *** [umfpack_di_demo] Error 1
make[1]: Leaving directory `/home/afm/afmnrg/Q^3UIC_intel/SPARS/UMFPACK/Demo’

————————————————————
Any idea what I am doing wrong ??

http://matrixprogramming.com/2008/07/bebop

or use my SparseMatrix, see

http://matrixprogramming.com/2011/06/sample-code-in-c-to-run-sparse-solvers

Which is the most efficient way of transforming a SPARSE MATRIX from COO format to CCF format ?? Has umfpack any function for that ??

And can UMPFACK work with the COO format ??

Thank you in advance.

Néstor.

I am running it without Blass and it is really fast:

It takes around 0.05 seconds to solve my system while LAPACK solver was taking almost 3 s. I guess I do not need BLAS, I am quite happy with the speedup ! :)

Thanks for your help.

Néstor.