Comment # 5 on bug 1092035 from Fei Li

(In reply to magist3r sergei from comment #4)
> Hi. I used geekbench benchmark.
> Here is my general result: https://browser.geekbench.com/v4/cpu/8134716
> And here after cpu performance drop:
> https://browser.geekbench.com/v4/cpu/8134665
> 
> CPU performance drop is present right after starting VM with *-IBRS profile
> and restores only with CPU power reset (reboot or suspend/resume). Even
> stopping all VM's not solves the problem.
So your problem is stopping the VM with *-IBRS can not restore the host CPU
performance, and instead the performance can only be restored by rebooting the
host, right? This sounds not like the same with this bug's title. :)
Will try to reproduce it on my environment then and see what's wrong with this.

> I checked this many times and I am
> 100% sure that it is caused by VM with this profile. There are no other
> workloads on the host, but CPU is almost two times slower.
> 
> And as I said IvyBridge profile without IBRS works just fine.