On Tue, 2019-07-23 at 06:01 +1000, David Airlie wrote: > On Tue, Jul 23, 2019 at 5:58 AM Ben Cotton <bcot...@redhat.com> wrote: > > On Mon, Jul 22, 2019 at 3:45 PM Solomon Peachy <pi...@shaftnet.org> wrote: > > > But since anectdote != data, are there any sort of deployment numbers > > > out there that show how many Fedora deployments are on AVX[2]-capable > > > hardware? > > > > > There are no stats available that could be considered defensible. At > > best, we could come up with some estimates based on the stats from > > other sources that we might assume have a similar profile as Fedora. > > I'm not sure if that data exists anywhere, though. > > > > My main personal machine also lacks AVX2-capable hardware, so from a > > personal perspective, I'm not super keen on this change. I'm > > privileged enough to be able to upgrade my hardware if required, but I > > recognize that it's not a reasonable request for others. > > > > > > Fedora will use current CPUs more efficiently, increasing performance > > > > and reducing power consumption. > > > > > > I think we need to see some actual benchmarks demonstrating this. For > > > the core kernel and system libraries rather than microbenchmarks or > > > specific applications that already sport AVX[2] codepaths. > > > > > I agree. It would be good to see some more specifics about what the > > benefit will be. That's the only way we can decide if it's worth the > > cost. > > I think we don't need to bother, there is way too much hardware still > being sold by CPU vendors that don't meet this baseline.
+1. As I wrote on the talk page for this Change I see it as a complete non-starter. I don't think we need detailed data to just say that a change which means Fedora won't work on all CPUs made prior to 2013 (and apparently quite a lot made since then) is a complete non-starter. Dropping i686 is a Change I can get behind, but this one is being proposed about a decade too early. (For anyone collecting anecdata, though: of the 5 PCs running Fedora in this room, I think only one would be AVX2-capable). -- Adam Williamson Fedora QA Community Monkey IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net http://www.happyassassin.net _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
