Juergen Gross <jgross@xxxxxxxx> writes: > On 14.07.21 13:45, Vitaly Kuznetsov wrote: > >> Personally, I'd vote for introducing a 'ratio' parameter then so >> generally users will only have to set 'kvm.max_vcpus'. > > Okay. > > Default '4' then? Or '2 ^ (topology_levels - 2)' (assuming a > topology_level of 3 on Intel: thread/core/socket and 4 on EPYC: > thread/core/package/socket). I'd suggest we default to '4' for both Intel and AMD as we haven't given up completely on cross-vendor VMs (running AMD VMs on Intel CPUs and vice versa). It would be great to leave a comment where the number comes from of course. -- Vitaly
