On Sun, 22 Sep 2013 20:27:52 +0100 "Richard W.M. Jones" <rjones@xxxxxxxxxx> wrote: > > However, ATLAS still has different flavors for different CPUs (e.g. > > 3dnow, sse, sse2, sse3 etc). I'm not sure if this can be easily > > handled with alternatives. > > Grrrr. > > Please don't [to ATLAS upstream, not Susi] do this. It breaks all > sorts of scenarios, especially virtual machine migration or simply > moving hard disks from one physical machine to another. > > Arrange your code so it chooses the best available routines when the > program starts up, and compile every feasible alternative into the > binary. Or use kernel vdso/user-helper functions when that is > applicable. I might mention that OpenBLAS (successor to GotoBLAS) is in Fedora, which is often 2x faster than ATLAS. But, it's only available on ix86 and x86_64. It does have runtime CPU detection, though for the 20-odd CPUs supported. -- Susi Lehtola Fedora Project Contributor jussilehtola@xxxxxxxxxxxxxxxxx -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
