Building atlas on a modern processor such an i7 takes ~1 day, because the current atlas shipped in debian/ubuntu is too old and does not provide architectural defaults for modern processors.
As a matter of fact, it is completely impossible to build atlas on recent intel processor, because the build scripts are not compatible with the p-state cpu driver. Furthermore, atlas as shipped in debian/ubuntu is slow to run because it "is terribly out of date, and was released only because the threading rewrite it taking too long. If possible, you should use a developer release after testing that it works for your particular platform. In particular, developer releases are *much* faster for any x86 that uses AVX or later SIMD ISA, or any machine with ncores >= 8." This is from the release notes of the version in ubuntu. See https://bugs.launchpad.net/ubuntu/+source/atlas/+bug/1347026 https://bugs.launchpad.net/ubuntu/+source/atlas/+bug/1370405 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/604574 Title: Enable multi-thread support for atlas in ubuntu packages for multicore architectures To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/atlas/+bug/604574/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
