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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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A noticeable difference in kernels? (lemmy.ml)

submitted 1 week ago by tetris11@lemmy.ml to c/linux@lemmy.ml

29 comments fedilink hide all child comments

I have the following kernels installed:

linux-zen (Zen)
linux-rt (RealTime)
linux-hardened (Security Hardened)
linux-lts (Long Term Support)
linux-tr-lts (Realtime LTS)

When I boot up, I try the different kernels from time to time just to see if anything interesting happens. It never does.

My question: How do I actually physically notice the difference between these kernels? If I use RT, does Firefox spawn quicker (in my testing, no, not really)?

What are some use cases when I can really see the difference in these kernels?

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[–] Laser@feddit.org 58 points 1 week ago (20 children)

Realtime is not about being fast, it's about time guarantees. It helps with or is required for workloads that require realtime, which I think includes audio production, but might also be helpful for things like controllers etc. where you need to make sure incoming data is processed in a guaranteed time or else fail. Browsing the web isn't part of these, so an RT kernel will most likely be a hindrance.

[–] wabasso@lemmy.ca 10 points 1 week ago (8 children)

Ok this discussion reminds me of a gripe: Is there a Linux distribution or kernel that prioritizes the UI over everything else, including an OOM situation?

I’ve never had (modern) Windows kernel panic on me, or completely slow to the point I can’t get Ctrl+Alt+Del registered.

Let me know if I’m just using Linux stupidly though…

[–] Codilingus@sh.itjust.works 6 points 1 week ago (2 children)

There's a systemd OOM service that can be setup. I use CachyOS and they have it as a checkbox to turn it on or off.

[–] wabasso@lemmy.ca 2 points 1 week ago (1 children)

Going to look into this, thanks!

[–] Starfighter@discuss.tchncs.de 3 points 1 week ago

I've had this exact same gripe and can thankfully report that running EarlyOOM has fixed this for me.

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