Windows 11 (x86_64) runs very slowly on MacOS (Intel)

[p8952]

Issue
Windows 11 (x86_64) runs very slowly for even basic tasks, opening the start menu, browsing files, etc. Application windows appear to be rendered "choppily" when opening or being moved around. SPICE Guest Tools are installed, and Clipboard / File Sharing works, Automatic Window Resizing didn't work until enabling Retina Mode as per #4064.

Configuration

• UTM Version: 3.2.4 (58)
• SPICE Guest Tools Version: 0.164.3
• macOS Version: 12.6 (21G115)
• Mac Chip: Intel
• • MacBook Pro: 13-inch, 2016, Four Thunderbolt 3 Ports
• • Processor: 3.1 GHz Dual-Core Intel Core i5
• • Memory: 16 GB 2133 MHz LPDDR3
• • Graphics: Intel Iris Graphics 550 1536 MB

VM Settings:

[stonerl]

Add these additional lines in the QEMU section:

-cpu
Cascadelake-Server,hv-relaxed,hv-vapic,hv_spinlocks=0x1fff,hv-runtime,hv-time,hv-frequencies,hv-xmm-input
-no-hpet

More Info can be found here: Hyper-V Enlightenments

[brad-x]

Add these additional lines in the QEMU section:

-cpu
Cascadelake-Server,hv-relaxed,hv-vapic,hv_spinlocks=0x1fff,hv-runtime,hv-time,hv-frequencies,hv-xmm-input
-no-hpet

More Info can be found here: Hyper-V Enlightenments

Interesting! Have you tested this with HVF?

[stonerl]

Yes.

[AlBundy33]

Did you found a solution for better performance in a windows 11 vm?
I have currently the same issue (see #6451)

windows 11 is much slower than a parallels vm.
and with the arguments in this issue here I get a bluescreen (inside the vm) when I try to install windows.

I have not tested yet #5468

[squeeb]

Add these additional lines in the QEMU section:

-cpu
Cascadelake-Server,hv-relaxed,hv-vapic,hv_spinlocks=0x1fff,hv-runtime,hv-time,hv-frequencies,hv-xmm-input
-no-hpet

More Info can be found here: Hyper-V Enlightenments

Interesting! Have you tested this with HVF?

Adding the Hyper-V flags made no discernible difference to the performance of Windows 11, sadly.