On Mon, Jul 22, 2019 at 4:43 PM David Airlie <airlied(a)redhat.com> wrote:
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:
> >
> >
https://fedoraproject.org/wiki/Changes/x86-64_micro-architecture_update
> >
> > == 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:fweimer@redhat.com 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.
Ah, I completely glossed over that. My apologies.
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.
Hm. I don't think it needs to turn into that. Perhaps it can lead to
a productive conversation in another way.
josh