Thread: https://github.com/gnif/LookingGlass/issues/117
Hello, what are possibilities for passing input into VM (which I know): - KVM switch (baremetal performance / latency) - Pass whole USB port into VM (baremetal performance / latency) - Synergy (over network, for example localhost) - Spice (as far as I know, LookingGlass uses this as default) - Evdev (this is what I found, it should be something like event handler which is built into Linux kernel and qemu can work with it and I read that it should be low latency) So KVM switch is the best from performance view, but it is not seamless, because you have to always press button to redirect input back to host. Synergy is seamless, but there is probably some kind of latency and overhead, because it is over network (even localhost). What I heard about Spice is that it have some latency + overhead, because it will setup virtual display. The last one is Evdev what I found recently, here is article about it https://passthroughpo.st/using-evdev-passthrough-seamless-vm-input/ it looks like the best option because it is built into Linux kernel and qemu and as far as I know there is no latency, but disadvantages what I read is that you bind and unbind input devices from VM by pressing both Ctrl at same time, I would like to have it on Scroll lock (because it has led indicator) and another is that it supports (or supported) only basic mouse input (like left click, right lick, scroll wheel and movement). So question is what is the best method (lowest latency --> for gaming) for passing mouse / keyboard input into VM running in localhost, I don't want to use KVM switch or pass whole USB into VM, so I am interested in Spice, Synergy or Evdev. Are there any measured numbers of latency? Thank you very much
