Bug#580335: Please compile multithreaded ATLAS libraries

Sylvestre Ledru sylvestre at debian.org
Fri Jul 9 09:16:44 UTC 2010

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:


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