this post was submitted on 19 Nov 2024
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Linux Kernel 6.12 Has Landed – And It's a Big One (www.omgubuntu.co.uk)
submitted 2 weeks ago by [email protected] to c/linux
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cross-posted from: https://lemmy.zip/post/26533086

Linux kernel 6.12 is one of the most significant releases of the year, delivering a feature nearly 20 years in the making: true real-time computing.

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[–] [email protected] 3 points 2 weeks ago (1 children)

@thingsiplay @lemmy.ca A normal preemptive kernel with 1000HZ tick will usually provide sub 1ms latency which for most audio is adequate.

That said, I just built 6.12.0 and the display drivers for UHD630 graphics appear to be broken, at least when compiled for realtime. I am going to go re-compile it normal pre-emptive as I normally do and see if it has the same issues. It booted, and got up to the point where it executed /etc/rc.local because it turned on my keyboard leds, but the screen never displayed.

If you wish to try I have built for both debian and redhat based systems, you can download the install packages, .deb or .rpm at:
https://www.eskimo.com/kernel/linux-6.12-tickless/realtime/

[–] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago)

The issues are mainly under high CPU load. A RT kernel will continue to maintain low latency without xruns but a normal kernel may not. The compromise option is full preemption which generally does a good job but doesn't have the issues with throughput that can occur with a RT kernel.

Although maybe you meant full when you indicated a preemptive kernel (voluntary preemption is still the default I believe but it's kernel dependent).