On Mon, Jul 22, 2019 at 2:52 PM Ben Cotton <bcotton(a)redhat.com> wrote:
== Summary ==
Fedora currently uses the original K8 micro-architecture (without
3DNow! and other AMD-specific parts) as the baseline for its
<code>x86_64</code> architecture. This baseline dates back to 2003
and has not been updated since. As a result, performance of Fedora is
not as good as it could be on current CPUs.
This change to update the micro-architecture level for the
architecture to something more recent.
* Other developers: Other developers may have to adjust test suites
which expect exact floating point results, and correct linking with
<code>libatomic</code>. They will also have to upgrade their x86-64
machines to something that can execute AVX2 instructions.
I think it's clear just from the initial replies to this thread that
even the most involved Fedorans (AKA the ones most likely to have
access to newer hardware) would be unable to run a sizeable percentage
of their systems if the minimum requirement became AVX2+
With my FESCo hat on, I can't support this action as currently stated.
I think I'd be more inclined to consider it if the Change was proposed
as a new architecture bring-up. Effectively, this would be a whole new
architecture that would just happen to be largely compatible with