Vfio | Damien Dye's Blog

One physical GPU split into virtual functions handed to separate Windows desktops

Licence-Free Windows VDI on Proxmox with an Intel Arc Pro B50 — and the Firmware Limit That Stopped It

Intel’s Arc Pro cards do SR-IOV natively, with no vGPU licence to buy — which makes a licence-free Windows VDI on Proxmox genuinely possible. The whole build on a B50, the Windows-first bootstrap problem, why the firmware caps it at two virtual functions, and how many each card in the B-series gives you.

A curve rising from 36 percent of bare metal at queue depth 1 to within a few percent by queue depth 32

PCIe Passthrough Performance on Proxmox VE — The IOMMU Tax and How to Minimise It

Why PCIe devices lose throughput when passed through to a VM via VFIO, and the practical tuning steps that claw most of it back.

A latency-percentile curve that stays flat to p90 then climbs steeply, beside one that stays flat

PCIe ASPM and Why You Should Disable It for Passthrough

Active State Power Management saves a few watts on idle PCIe links. Under VFIO passthrough, it adds latency jitter that’s hard to diagnose and easy to fix.