On Mon, Jun 17, 2024 at 9:28 AM <[email protected]> wrote: > Hi again > This does not mean that the cpu is not supported, it just means that > instructions/feutures that are above intel icelake will not be available to > virtual machines. The cpu should be recognized and work fine at the > hypervisor. I think the only extra instruction set that will not be > available to virtual machines is intel AMX. > (became available after intel icelake) > > When speaking about AMX, you have to consider three layers: kernel, QEMU, libvirt
. support in the KVM kernel module is there since 5.17 If you decline to Red Hat base OS distros, you can refer to this: https://access.redhat.com/solutions/7033476 that means AMX support is present since 9.0 GA and since 8.6 GA . support of cpu model SapphireRapids, the first offering AMX as an ISA extension, is in QEMU since 7.0 . support for the SapphireRapids CPU model was added in libvirt 9.4.0 I would say that in CentOS 9 Stream all the dependencies above should be satisfied. On RH EL 8 based systems, and so also on OLVM, the missing part is related to libvirt still being at 9.0.0-5 Also, speaking about oVirt, I don't know how it manages the dropdown menu when you select "CPU Type" in cluster creation and edit phases. Does it directly use a command, such as "virsh cpu-models x86_64", on the fly or the list of xml files under /usr/share/libvirt/cpu_map/ directory or an oVirt maintained specific file or inside the engine db? Any clarification on this? For the ones without any AMX knowledge, a good starting point to understand its AI acceleration capabilities for CPU based workloads, is here: https://www.intel.com/content/www/us/en/products/docs/accelerator-engines/advanced-matrix-extensions/overview.html HIH, Gianluca
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