Mesa i76e error finishing read. Another Time with LinuxCNC 2.9.1

Hi,

I read a lot of this issue so sorry for opening another topic but i don´t get it working.

- Using a mesa 7i76e
- Error occurs after 30 minutes to about 2 hours runtime.
- I allready disabled the CPU power safe options (i read in other topics here), see attached
- I allready increased the servo thread time to 2 ms - same issue
- My Ethernetcard is an Intel I219-LM
- CPU is i5 6500T
- Kernel version PREEMPT_RT Debian 6.1.55-1 (2023-09-23)

What I read in some other threads is that I have to disable something in IRQ coalsion Setting for an Intel network card. But I have absolutely no idea how I should do this? This seems to be the only thing I do not did for now. Can somebody introduce me step by step?

BR
Jannik

Is the computer setup for UEFI mode?

(there is another thread using a HP EliteDesk Mini G2 with a I5-6500T that had
network latency issues in legacy BIOS mode but was OK in UEFI mode)

To try disabling coalescing, in a terminal window, type

sudo ethtool -C [your_ethernet_device_name] rx-usecs 0

This will only work until you reboot. to fix it permanently, you edit the interfaces
file. the hm2_eth manual page describes this"

man hm2_eth

 

I would be surprised if PCW's suggestion does not resolve the problem.

Hard to find out the UEFI / Lagacy issue. In Bios both seems to be activiated, see attached. But I don´t know how the linuxcnc was installed. If computer choosed UEFI / Lagacy. Is there an information in Debian visible? For Windows I found a lot of informations in googel, but for Debian?!

ethtool is an unknown command. Before I wanted to install it (I am a bit afraid of chrashing my current installation because I don´t know what I am really doing in linux sometimes), I want to go on to modify the interface file hm2_eth. I read the docu, but there is no information how to it?

 

If ethtool is not installed, install with

sudo apt-get install ethtool

The instructions for editing the interfaces file is in the hm2_eth manual page:

man hm2_eth

(in a terminal)

 

Thanks again. I found it and edited the network interface file.
After a restart my network connection disappeared in the graphics overview of debian (right upper corner on desktop). But it is connected.
I think I am using now a different network manager (in background)? Or what I have done?

Ok linuxCNC is still starting and mesa is connected. I will start to let it run tomorrow morning. For overnight my setup is still noch ready for...

Just by the way: Today was a good day without a mesa error finishing read. I don´t really know why. Only thing what was different is that I connected the LAN cable to my second networkcard (which is connected via USB - the USB-Networkcard itself is connected everytime but not the cable to my LAN). This is something I normally not have. It´s now disconnected again to see a different behavior tomorror.

I will report after test tomorrow.

Yes, that connection is no longer managed by the network manager GUI

You should verify that irq coalescing is disabled with

ethtool -c [your_ethernet_device_name]

(because if you have a syntax error in the interfaces file, it
is unreported and will silently fail)

It´s running perfectly since 10 hours.
I also recheckt the setting with ethtool.

Just a small hint: After installation it wasn´t possible to run the command. You need to sudo ethtool -c [your_ethernet_device_name]

So for now the topic is solved I think.

Many thanks!