How would one use looking glass to switch between VMs (that are using GPU passthrough) if you want to use only 1 display and 1 keyboard? I would like to be able to switch between VMs using the keyboard without any noticeable latency.
I was thinking this would be more of an “extra hardware” application - where you plug in your GPUs outputs into another card, which has some OS software to switch between them and is connected to only one display. However, I have heard about SR-IOV, but haven’t researched it yet.
Provided the capture is fast, the latency of the transfer is in the microseconds. The upload into the 2nd GPU however may incur additional latency depending on the hardware implementation. In most setups you should not see more then a frame or two of latency at most.