On Sun, 2009-04-05 at 23:01 +0100, psmith wrote: > i completely understand the reasoning to move i365 up to i586, but why > on earth restrict i686 capable processors to the i586 instruction sets? Again: the only difference between i586 and i686 is the CMOV family of instructions, which are generally *slower* than the i586 version. You can read Linus' detailed explanation here: http://ondioline.org/mail/cmov-a-bad-idea-on-out-of-order-cpus Building for i686 gives *no* real performance benefit[1], but breaks support for i586 machines - Via C7-based netbooks, AMD Geode (e.g. the OLPC XO-1), and so on. -w [1] except on in-order CPUs like Atom and the original Pentium -- fedora-test-list mailing list fedora-test-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-test-list
