Yeah, with Gentoo you could really get that latency down especially with a 
custom 6.0 kernel, but too many people are focused on mocking compiling times.






On Friday, September 16, 2022 at 05:03:42 PM UTC, Sebastian Kuzminsky 
<s...@highlab.com> wrote: 





On 9/14/22 15:35, Rod Webster wrote:
> 
> https://raspi.debian.net/tested-images/

This is awesome!

I tried the "2022-08-08" Bookworm image for Raspberry Pi 4.  The image 
is for the arm64 architecture.  Everything seems to work fine on a 
Raspberry Pi 4B, including wifi, GUI, and the serial console.

After `apt-get install linuxcnc-uspace linux-image-rt-arm64` and a 
little bit of tweaking, I'm now getting latencies around 150 µs, which 
is not as good as the Raspbian Buster armhf image at linuxcnc.org (~70 
µs latency) but probably acceptable.

It's neat that there are several easy(-ish), usable options for LinuxCNC 
on Raspberry Pi now.



-- 
Sebastian Kuzminsky


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