wilde.fyre

I can't believe it, but I fixed my severe Windows 10 VM stuttering issue. I was really hopeful that the MSI fix proposed above (I used MSI_util_v3.exe to enable msi, and set the interrupt priority to "High") was going to work for me, since lspci told me that my gpu+audio passthrough didn't have MSI enabled. Applied the fix, no dice. Then I resumed my two-day Google-fu and read like a thousand and one posts with all sorts of purported arcane fixes. I'm one post removed from sacrificing a virgin and using his blood to consecrate my VM. It turns out that this was my problem (see attached picture). I enabled this to run WSL, and I didn't suspect that it would cause a major issue with lag and stuttering. This was my last hail-mary, and I disabled it, rebooted the VM thinking it wouldn't do anything. VOILA. SLICK BUTTERY GOODNESS. Granted, I can't use WSL in my VM anymore but it wasn't that important compared to having the VM run smoothly. Now I'm streaming 4K videos on youtube on the VM through Parsec and everything works perfectly. Host setup: i7-7820x, Gigabyte X299 Gaming 3, 32GB RAM, Gigabyte AORUS Xtreme 1080ti (Single GPU passthrough), UEFI boot, ixgbe network bridge. VM setup: Windows 10, 4 isolated cores / 8 threads passthrough, GPU+HD Audio passthrough, 16GB RAM, network bridged to host ixgbe interface. tl;dr: Killing "Virtual Machine Platform" under "Windows Features" fixed my extreme stuttering/lagging problem with my Windows 10 VM.