Homelab

380 readers

9 users here now

Rules

Be Civil.
Post about your homelab, discussion of your homelab, questions you may have, or general discussion about transition your skill from the homelab to the workplace.
No memes or potato images.
We love detailed homelab builds, especially network diagrams!
Report any posts that you feel should be brought to our attention.
Please no shitposting or blogspam.
No Referral Linking.
Keep piracy discussion off of this community

founded 1 year ago

MODERATORS

[email protected]

can somebody(linux crack) confirm or dement this statement? (alien.top)

submitted 1 year ago by [email protected] to c/[email protected]

6 comments fedilink hide all child comments

i just read now a article about hardcoded scaling on linux, which is a maximum of 8 cores (or maybe even threads?) a few days ago also read that the cpu scheduler get's an overhaul so i hope they fix this issue, too. Article: https://thehftguy.com/2023/11/14/the-linux-kernel-has-been-accidentally-hardcoded-to-a-maximum-of-8-cores-for-nearly-20-years/

you are viewing a single comment's thread
view the rest of the comments

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

It’s clickbait and doesn’t have any real impact. It just effects the amount of time each process has before being preempted for multi tasking. You wouldn’t want this number to scale to a large number even with a large number of cores.

The Linux kernel supports using more than 8 cores.

(*not an expert and this is just from reading around a bit)

[–] [email protected] 1 points 11 months ago (1 children)

yes it shows you the cores, that's not the question but does the scheduler use them all or is he throwing the tasks between the cores which results in more latency/overhead to switch also the level1 or 2 cache inbetween. i running also linux for more then 5 years know, but it really would be a game changer if you not use all potential of all cores you have on your rig ... i really want to believe it, because that would have a great impact on mutlicore systems

[–] [email protected] 1 points 11 months ago

Did you read the article? It says it just caps the maximum runtime per thread, which they assume is suboptimal, but they don’t do any real analysis, provide any data, or anything. Could the scaling factor be changed and allow threads to run longer? Sure. Would it make a difference? Who knows, because this guy made a claim and provided no evidence.

Will Linux use more than 8 cores? Of course it will. I’ve got 40 in my home server and I can saturate all of them with no issue. There’s super computers with single system images running thousands of cores on Linux that don’t have a problem.