Solved Win11 hypervisor cpu performance impact (~ -10%)

hi all,

I need to run docker containers on my pc (work) but also like to have maximum performance for playing games. It seems that just by having the hypervisor running (no container, no wsl) the cpu performance is about -10% (e.g. cpu-z benchmark).

reproducible by running the following commands, restart, benchmark:
* bcdedit /set hypervisorlaunchtype off -> cpu-z single core score ~920
* bcdedit /set hypervisorlaunchtype auto -> cpu-z single core score ~855

problem is, that with "bcdedit /set hypervisorlaunchtype off" docker won't start.

I thought it had something to do with virtualization based security (vbs) but using various commands to disable that (and checkinging in System Information - "Virtualization-based security": Running, Enabled but not running, ...) does not change the results (keys in HKEY_LOCAL_MACHINE/SystemCurrentControlSetControlDeviceGuard; gpedit - EnableVirtualizationBasedSecurity).
Also, changing the hypervisor scheduler type does not change anything (classic, core, root -> root was default)

It is of course not really important, probably won't notice a difference but I just don't like it (I try to optimize for peformance wherever possible).

Question: Any idea about how to not loose ~10% performance but be able to run docker containers?

I have never experienced such a loss in performance with the hypervisor enabled (at most 2-3%)

Are you comparing things on same basis i.e. running same apps in both cases. It could be Dockers Containers is causing most of the apparent loss of performance.

cereberus said:

I have never experienced such a loss in performance with the hypervisor enabled (at most 2-3%)

Are you comparing things on same basis i.e. running same apps in both cases. It could be Dockers Containers is causing most of the apparent loss of performance.

Click to expand...

cpu-z is executed on the host (windows11), no containers/wsl/vms or docker software (not even the docker service) running - the only difference is windows hypervisor running or not (bcdedit /set hypervisorlaunchtype off/auto)...

sny said:

cpu-z is executed on the host (windows11), no containers/wsl/vms or docker software (not even the docker service) running - the only difference is windows hypervisor running or not (bcdedit /set hypervisorlaunchtype off/auto)...

Click to expand...

Then I question cpu-z. Try running more rigorous benchmarking tools like passmark.

sny said:

I need to run docker containers on my pc (work) but also like to have maximum performance for playing games. It seems that just by having the hypervisor running (no container, no wsl) the cpu performance is about -10% (e.g. cpu-z benchmark).

Click to expand...

Welcome to Eleven Forum.

You can set up a boot menu to choose to start up with or without the Hypervisor. See post #2 here by Kari.

Bree said:

Welcome to Eleven Forum.

You can set up a boot menu to choose to start up with or without the Hypervisor. See post #2 here by Kari.

How to start Hyper-V Hypervisor and then end it? - Windows 10 Help Forums

Hi! I tried Windows Phone Emulator in Hyper-V. It reports that Hyper-V Hypervisor is not running error. So, How to start Hyper-V Hypervisor? And also - how to stop Hyper-V Hypervisor? I need it. No matter of solution, I accept also writing into Windows re

www.tenforums.com

Click to expand...

thank you, very helpful suggestion! this is actually sufficient 99% of the time (pc start, work, shutdown, do whatever, pc start, play)

update: i had to restore a backup from 2 month back, installed all updates and I do not have this performance degredation with enabled hypervisor any longer - it seems something was wrong with my system, for whatever reason.

sny said:

update: i had to restore a backup from 2 month back, installed all updates and I do not have this performance degredation with enabled hypervisor any longer - it seems something was wrong with my system, for whatever reason.

Click to expand...

Thanks for updating - please mark as solved.