Locking a Qube to specific processor cores

[corporateblush]

Hybrid CPU: benchmarking performance when pinning to specific cores

Related to hybrid CPUs with Performance/Efficient cores and this topic CPU Pinning Alder Lake explaining how to assign CPUs to a Qubes OS VM, I made a benchmark showing the performance difference between 4 performance / 4 efficient / 4 cores with no special pinning in Qubes OS I added a Ryzen 5 5600X desktop CPU and a Laptop with an i5-7300U (Lenovo Thinkpad T470) to the benchmarks. The T470 CPU is only 2 cores with hyperthreading, so it has 4 threads at best, sharing with the single benchmark …

… and from there following links posted, might help.

Also

Qubes Cpu Pinning: automatically pin CPUs for VMs

I was referring to this comment by @renehoj, wherein you could help make SMT (moderately) more secure by setting sched-gran=core, but it was not possible with asymmetric CPUs. I am not fully sure about that, althought the Xen wiki page about CPU pinning does not mention that it should only work with credit(1). Later in the day I can do some testing based on the amount of fan noise/temperature rise when I perform soft pinning.