Reducing CPU usage

[LGUG2Z]

I have an AMD Ryzen 9 3900X 12-core processor, and when left running unchecked, kanata's CPU usage sits at 30%+.

If I use Task Manager to restrict which processors kanata.exe can utilise, the CPU drops down to a negligible 0.x% without any noticeable performance impact (including with the TCP server emitting outgoing and processing incoming messages).

I think it would be a good idea to allow the number of processors that kanata utilises to be configurable either via a command line flag or through the configuration file.

[jtroo]

Oops, misclicked on mobile.

Before making any action, it would be good to gather info and understand why kanata is somehow spending 30% of CPU resources.

For me on version 1.0.5 in Windows, kanata usually stays at 0% and I've only seen it reach 0.2% occasionally. This is without doing any processor affinity changes.

My initial guess is something problematic that we missed in the TCP code, but I'm unsure for now.

I wouldn't want a user to have to mess around with configurations of number of processors to reduce CPU consumption; it should be at a good, low level by default.

[LGUG2Z]

Okay the TCP server is probably exactly the root of this problem. 😅

I'll dig around in the code on my branch and try to figure this out.

[LGUG2Z]

Yeah this was definitely the shoddy tcp incoming message handling code on my working branch. 😅

tl;dr I was wasting a lot of cycles trying to acquire mutex locks unnecessarily.

I have fixed this now, CPU usage is back at a cool 0%. 😎