RPI4 Raspbian 64 bit & LinuxCNC

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07 Oct 2022 02:18 - 07 Oct 2022 02:21 #253641 by Bari
highlab.com/~seb/linuxcnc/rpi4-10us-latency.png

Seb on the IRC dev channel:
'it involves running each RT thread on its own dedicated CPU, and using busywait instead of sleep to start the next thread invocation
that's running on the arm64/aarch64 debian bookworm image from raspi.debian.net, not Raspberry Pi OS/raspbian
it's just a proof of concept at this point, i hope to clean it up and push it for review in the next week or two"

Hopefully transportable to actually available ARM boards vs Rpi.
Last edit: 07 Oct 2022 02:21 by Bari.

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14 Nov 2022 03:42 - 14 Nov 2022 08:36 #256653 by Zuo99
Hello, elovalvo. Thank you for your work.

I used version 2. 8 from other topics before, and then I used your link Linux 5.15.65-rt49-v8 linuxcnc 2.9. But I found that raspberry pie is more stuttered than the previous version, flipping through your post, it seems that the delay effect of the 5.4.61-rt32-v8 version is better, but the previous link is no longer available. I hope you can provide the link to 5.4.61-rt32-v8 2.9. thank you very much.
Last edit: 14 Nov 2022 08:36 by Zuo99.

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15 Nov 2022 18:12 #256791 by elovalvo

Hello, elovalvo. Thank you for your work.

I used version 2. 8 from other topics before, and then I used your link Linux 5.15.65-rt49-v8 linuxcnc 2.9. But I found that raspberry pie is more stuttered than the previous version, flipping through your post, it seems that the delay effect of the 5.4.61-rt32-v8 version is better, but the previous link is no longer available. I hope you can provide the link to 5.4.61-rt32-v8 2.9. thank you very much.


To make room in the google drive I deleted the versions that seemed outdated.

Now let's see if I saved that version you refer to somewhere, but I don't think so.

Or I try to reconstruct it as reported here
forum.linuxcnc.org/9-installing-linuxcnc...uxcnc?start=0#178299

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17 Nov 2022 23:06 #256979 by andypugh
For a possible fix for stuttering, see the last paragraph here:

forum.linuxcnc.org/38-general-linuxcnc-q...lved?start=10#256153

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