Getting timer to close errors on my toolhead boards

General Discussion
1

Basic Information:

Printer Model: Siboor Voron 2.4
MCU / Printerboard: Octopus Pro 1.0.1 + x2 nitehawk 36
Host / SBC: Libre Computer Renagade (4gb RAM + RK3328)
klippy.log:

klippy (2).log.zip (1.2 MB)

Fill out above information and in all cases attach your klippy.log file (use zip to compress it, if too big). Pasting your printer.cfg is not needed
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Describe your issue:

I was getting TTC on my CB1 with two toolheads and the main MCU, mostly with the main MCU, so I swapped to a libre computer renagade. Though, for some reason, I occasionally get TTCs on the toolhead boards now. It seems to be random which toolhead errors. I’m only using toolhead 1, T0, currently as I need to redo its docking.

THE CB1 issues I chopped up to everything else I ran on it, but the renagade I have nothing definitive as only klipper and moonraker is on it. One hypothesis I have is that the scheduler for the RK3328 is swapping klipper from a P core to an E core sometimes and that’s causing TTC errors, but I’m not sure about that…

I am running KTC easy, as this is a stealthchanger, but it’s mainline klipper otherwise, just about 100 commits behind from main due to breaking changes in newer versions.

2

but it’s mainline klipper otherwise

This is not how it works; you have many different modifications, and it is questionable which one of them can cause this behaviour.
(Or they can be fine, who knows?).

This can help: PoC reactor: timers tracker by nefelim4ag · Pull Request #7170 · Klipper3d/klipper · GitHub
You probably can cherry-pick it.

Hard to tell, from what I can say, both toolheads got TTC,
So, I guess the host was too busy for whatever reason.

-Timofey

3

I am getting TTC on the main MCU as well but my klipper build on the mcu is newer than the host while one of the toolhead boards is still on 0.12. I just flashed the other toolhead with 0.13

4

Hard to tell, from what I can say, both toolheads got TTC,
So, I guess the host was too busy for whatever reason.

doubtful on the toolheads being the cause… I only had one being used while the other one sat there. Also I could be misremembering and only one toolhead did it, mostly the one being used in a print. Though I don’t see how the Renagade could be overloaded with just klipper and moonraker. I’m not even running a camera on it. My cameras are on another host.

The CB1 definitely had load issues, I can confirm that.