How build Linuxcnc with xenomai3?

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09 Oct 2022 20:05 #253823 by Bari
Franco,

Which hardware did you test RTAI with and what results did you see. Please post any latency test results with CPU used.

Much thanks!

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09 Oct 2022 22:52 #253830 by fsabbatini
Hi Bari,
Hardware is core i5 4gen single board computer,
The issue was not latency but the pc was always running hot , really hot and also with Ethercat master, lots of missed frames and unmatched datagrams.
Changed to xenomai and issues solved, now pc is running cold with 1ms cycle

Regards,
Franco

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03 Feb 2023 06:04 #263577 by troy
Hi Franco,
Recently I'm  going to use a nuc(intel celeron J4125 + intel i210/i211) to build an lcnc controller with EtherCAT, but  Supported Ethernet Hardware list  on etherlab website does not include intel i210,I was wondering which driver you use to support intel i210,thanks a lot!

link: www.etherlab.org/en/ethercat/hardware.php

 Best egards
 troy

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03 Feb 2023 06:20 #263578 by rodw
I would probably give your NUC a go. I think that network support has been enhanced since that was written.
Follow the sticky in the ethercat section here

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03 Feb 2023 08:50 #263584 by troy

I would probably give your NUC a go. I think that network support has been enhanced since that was written.
Follow the sticky in the ethercat section here
 

Hi rod,
you mean your post "Ethercat installation from repositories - how to step by step" in Ethercat section? ok, I will try it.

Actully, I've already build a ethercat lcnc controllor, solution:
ARM Cortex-A53 + RealTek 8169 + xenomai3.0 + etherlab ethercat master + lcec(linuxcnc-ethercat);
It works well, but the hardware is customized, I'm look for a more general hardware platform such as NUC which has a Higher single-core computing frequency.

and I also want to know the real-time performance about preempt-rt nowaday. 
I read some articles comparing the performance of RTAI XENOMAI PREEMPT-RT there years ago, in that time, most of the conclusions say that xenomai performance is the best of three, I dont know if the latency will become worse when I use preempt-rt  instead of xenomai.

Regards
troy

 

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03 Feb 2023 11:47 #263593 by fsabbatini
Hi! I210 is supported on igb driver my friend

Regards
Franco
The following user(s) said Thank You: troy

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03 Feb 2023 14:23 #263600 by troy

Hi! I210 is supported on igb driver my friend

Regards
Franco
 

oh god yes, I found it on intel website !  thanks!

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06 Feb 2023 03:40 #263790 by troy

Hi! I210 is supported on igb driver my friend

Regards
Franco

Hi Franco,
I have another question: I notice that you realize a real-time linuxcnc controller which has a ethercat master, and the controller seems to be  implemented with hardware (core i5 + intel i210  pc) and software (xenomai3.0 + igb driver + linuxcnc), have you test the latency performance of EtherCAT master?     In the process of implementation, do you need  extra development besides using these existing resources?

Thanks!

Regards
troy
 

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