On Wed, Jun 16, 2021 at 12:37:57PM +0200, Eugene Syromiatnikov wrote: > On Wed, Jun 16, 2021 at 09:28:47AM +0100, Daniel P. Berrangé wrote: > > On Tue, Jun 15, 2021 at 05:34:02PM -0400, Neal Gompa wrote: > > > Hey all, > > > > > > Earlier this week, I was helping with processing features for openSUSE > > > Leap 15.4[1] and I discovered that they're planning on introducing > > > x86_64-v2 to openSUSE soon. The reference for this change was that > > > RHEL 9 is going to use x86_64-v2[2]. Additionally, other distributions > > > have been considering bumping up to v2 or v3[3][4]. > > > > > > Some cursory examination of the new x86_64 sublevels seem to indicate > > > that x86_64-v2 goes back to roughly 2007~2008, merely cutting off the > > > first couple of generations of x86_64 CPUs from Intel and AMD. I > > > personally don't have any computers that don't have support for > > > x86_64-v2 anymore. > > > > Yes, you loose primarily Intel Conroe and Penryn generations and > > AMD Opteron Gen 1 -> Gen 3. I doubt this is a significant portion > > of Fedora installs. > > What many seem to confuse here is when there were the first CPUs > that support a particular set of instruction versus the last one that > does not. Intel almost prides itself on its product segmentation, > and there is a ton of recently (in 2020!) released Pentium/Celeron/Atom > CPUs that still do not support even AVX[1][2]. > > [1] https://ark.intel.com/content/www/us/en/ark/products/203896/intel-pentium-gold-g6400e-processor-4m-cache-3-80-ghz.html > released in Q2 2020, only SSE4.1/4.2 is listed, cf. > https://ark.intel.com/content/www/us/en/ark/products/199283/intel-core-i3-10100-processor-6m-cache-up-to-4-30-ghz.html > [2] https://www.tomshardware.com/news/intels-latest-celeron-and-pentium-cpus-finally-get-avx2-avx-512-support Oops, I confused "Gen 3" above with x86_64-v3; however, with regards to v2 support, Westmere-based Pentiums/Celerons were released in 2011 and do not support SSE4.1/4.2. [1] https://www.cpu-world.com/sspec/SL/SLBT6.html _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
