I’ve created a Windows 10 HVM with my GPU passed through. When playing games that are GPU heavy, I noticed a huge drop off in performance compared to bare metal and KVM passthrough setups I’ve tried previously on this hardware. When benchmarking using userbenchmark.com (not the most reliable, but …

Just got a MASSIVE boost in my Windows HVM after messing with xen.xml, getting native frames in Cyberpunk, Starfield, and Hogwarts Legacy now and seeing much higher GPU usage. Here is my current XML . Going to do a little more testing to try to figure out exactly which option gave me the boost and i…

[image] Cameron: Performance in-game for me is roughly half, Cinebench I got the same scores as metal for CPU for Single and Multi Core but my GPU score did drop by about 3000 points. Yeah, seems like we are both experiencing a huge drop off in GPU performance. What I noticed is on my PCIe U…

Interesting, I am passing through just an existing controller as my board has 3 so I just robbed one from sys-usb and am using a powered USB Hub and switch to switch between 2 ports on the computer and I have not noticed any drop out. The only USB issues I had was actually when using Qubes to attach…

Did a little more digging with nvtop and htop with the game running. You can see it’s reporting as PCIe Gen 4@16x, unsure on the RX and TX rates on that I never used Linux baremetal for gaming. I don’t see any glaring issues, I really can’t understand where the bottleneck is. Searching around I’ve …

I’ve spent the entire day trying to figure out what could cause this. I’ve tried UEFI, qemu-traditional, tweaking my VMs XML, any many other things. 100 benchmarks later, I think it may just be the Xen architecture holding the GPU back and not a Qubes specific issue. I really have no idea what the p…

Is anyone having this issue on an AMD card? it might be worth it to look into opening an issue on the github if multiple people are having this problem

Report back how it works! I’m really trying to get rid of my Dual boot but if I absolutely have to, I’d much rather do VFIO with a Linux host.

Quick update: performance in the HVM is the same all the way down to 2 cores (2 cores with 4 threads is still the same framerate, 2 cores 0 threads finally begins to dip under 30). I turned SMT off in my bios, as well as core boosting and went back to Windows 10 baremetal and reran the benchmark. 8…

[image] Cameron: <feature policy="require" name="invtsc"/> <feature policy="disable" name="hypervisor"/> I added these tweaks to my XML and confirmed in Task Manager that it was disabled, however I am still getting the same benchmarks on my GPU, which is under half. :frowning: However, it …

What are your specs? Sorry tried looking but didn’t notice cpu might have missed it though. Can you provide your current XML? I provided the path to mine above should be similar for yours. I haven’t tried your benchmark yet, do you have any games that are performing poorly or just the benchmark? I…

Nevermind, that crappy benchmark software is a false alarm. I am getting much better performance in games. The GPU bound game I mentioned earlier went from 80fps → 120fps. Awesome job! I’m curious as to why it doesn’t work on Linux. I’m going to look into extra tweaks as well and see if anything ca…

Poor GPU performance in Qube

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apparatus January 9, 2024, 5:56am 19

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