Bug#580335: Please compile multithreaded ATLAS libraries

[Sylvestre Ledru]

Hello Ryo,


> I have been able to link my program with threaded ATLAS successfully as:
> 
> $ gcc test.c -L/usr/lib/atlas-corei7sse3 -lptf77blas -latlas -lgfortran
> 
> However, I cannot get any speed gain on our 8-core with hyperthreading machine.
Yes, and I guess my answer will disappoint you.
To allow your 8 cores to be used, you must rebuild Atlas (fakeroot
debian/rules custom).

Unlike the MKL, the number of thread is static:
http://math-atlas.sourceforge.net/faq.html#tnum

Sylvestre