On Tue, Jul 23, 2019 at 6:03 AM Josh Boyer <jwboyer(a)fedoraproject.org> wrote:
On Mon, Jul 22, 2019 at 3:27 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.
> == Owner ==
> * Name: [[User:fweimer| Florian Weimer]]
> * Email: [mailto:firstname.lastname@example.org fweimer(a)redhat.com]
> == Detailed Description ==
> After preliminary discussions with CPU vendors, we propose AVX2 as the
> new baseline. AVX2 support was introduced into CPUs from 2013 to
> 2015. See [https://en.wikipedia.org/wiki/Advanced_Vector_Extensions#CPUs_with_AVX2
> CPUs with AVX2].
Would it be possible to include some basic instructions or a script
for people to run on their systems to see if they are AVX2 compliant?
That would help them assess the impact.
They did below, grep avx2 /proc/cpuinfo.
But don't bother, this will just get embarrassing and turn into a pile
on. I think this should be retracted before it ends up being a
phoronix article making the project look bad.