Hyper-V memory performance hit in Windows 10

[ochadd]

I recently built a new PC and found that Hyper-V hit memory and cache performance hard when installed. Screenshots were taken @ idle. No virtual machines running or created. Basically Hyper-V installed, restarted, benchmarked. Virtualbox does not seem to have the same problem.

Before Hyper-V and without virtualization enabled in the bios.


With Hyper-V installed and virtualization enabled.


Hyper-V uninstalled and virtualization enabled.


I've always run Virtualbox on my personal home computer but run Hyper-V at work for production. Thought I'd try standardizing and run Hyper-V at home. Not sure if this is expected but I sure didn't.

Virtualbox installed and virt. enabled.

 

[Child of Wonder]

When you install the Hyper-V role your OS is now a VM, hence the dip in performance.

#Inception

 

[ochadd]

Thanks for the info. I had no idea.

 

[PGHammer]

When you install the Hyper-V role your OS is now a VM, hence the dip in performance.

#Inception

Actually, running a type I hypervisor (any of them) would cause a hit compared to straight VT-x (not a large one, but it's there) - that is why they have typically been on servers - not workstations or even general PCs. Windows 8 was, in fact, the first general-purpose OS that was capable of supporting a type I hypervisor that was NOT a server OS; the only real flaw with Windows 8 was that EPT was not exactly commonplace outside of server CPUs; even more problematical was that it was more common in terms of AMD general-purpose CPUs than on Intel - my first Windows 8+ Hyper-V testbed was an AMD-driven HP Pavilion. (It's running Windows 10 today - I use it for Android-development testing.) Nowadays, EPT is MUCH more common - and especially on Intel hardware, as is HTT support - while Hyper-V can use it, it's not a requirement. However, those that think of themselves as gamers - and especially hardcore gamers - hate running ANYTHING in the background while gaming.