On 7/18/18 8:49 AM, Eduardo Habkost wrote: > CCing the AMD people who worked on this. > > On Wed, Jul 18, 2018 at 12:18:45PM +0200, Pavel Hrdina wrote: >> On Wed, Jul 18, 2018 at 10:50:34AM +0100, Daniel P. Berrangé wrote: >>> On Wed, Jul 18, 2018 at 12:41:48PM +0300, Hetz Ben Hamo wrote: >>>> Hi, >>>> >>>> I've been looking at the CPU list and although I see lots of CPU's, I >>>> cannot find 2 CPU families: >>>> >>>> * AMD Ryzen >>>> * AMD Threadripper >>>> >>>> Although EPYC has been added recently. >>>> >>>> Are there any missing details which preventing adding those CPU's to the >>>> list? >>> Libvirt adds CPU models based on what QEMU supports. So from libvirt side the >>> answer is simply that QEMU doesn't expose any models for Ryzen/Threadripper, >>> but I'm not clear why it doesn't... EPYC model should work just fine on Ryzen/Threadripper. Are we seeing some issues? >>> For a while I thought Ryzen/Threadripper would have same feature set as >>> EPYC, but I've seen bugs recently suggesting that is not in fact the >>> case. So it does look like having those models exposed by QEMU might >>> be useful. >>> >>> Copy'ing QEMU devel & the CPU model maintainers for opinions. >> I think that QEMU should figure out some pattern for naming CPU models >> because it's one big mess. EPYC and Ryzen are bad names for QEMU as >> Core/Xeon would be for Intel CPUs. It's the name of a model families >> and it will probably remain the same but with different >> microarchitecture. >> Better name would be similarly like for the latest Inter CPUs, >> Skylake-Client and Skylake-Server. Currently AMD has already two >> microarchitectures, Zen and Zen+ and there is third one Zen 2 planned. >> >> Zen has AMD Ryzen, AMD Ryzen Threadripper and AMD Epyc. >> Zen+ has AMD Ryzen, AMD Ryzen Threadripper >> >> And I bet that Zen 2 will follow the same model families. My guess is same as your :) I hope sales/marketing does not come up with different names for Soc's based Zen 2 core. >> We probably cannot rename EPYC now, but before we introduce Ryzen and >> Threadripper let's thing about it and come up with better names, for >> example Zen-Client/Zen-Server Zen+-Client or something like that. Zen-Client/Zen-Server naming convention looks better. -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list
