Eperiences with Linux-ck?

rodaz143 · 2016-03-14 18:51:10

So I decided to try out Linux-ck (I'm running it right now) because I've heard good things about its performance, so I figured "why not?". It's running pretty well so far, but I haven't noticed any drastic changes yet. Benchmarks (which may not necessarily reflect real world circumstances) aside, what have your experiences been? I also have the nvidia-ck package installed because I apparently needed it too.

ugjka · 2016-03-14 19:00:06

rodaz143 wrote:

It's running pretty well so far, but I haven't noticed any drastic changes yet.

Anything drastically positive would get merged and would be the default.

I use ck optimized to my cpu with bfq enabled and I can't tell any difference. Maybe it is a litlle bit smoother, maybe I get 2-5FPS more, I can't tell...

rodaz143 · 2016-03-14 19:04:40

That makes sense. Considering you might have to install other stuff to get it to work (like nvidia-ck) it's probably not worth the effort in most cases, but it was pretty easy.
I enabled the _BFQ_enabled variable as well. What do you mean you have it optimized to your CPU?

ugjka · 2016-03-14 19:11:52

rodaz143 wrote:

What do you mean you have it optimized to your CPU?

Built with -march=native -mtune=native
Graysky's repo-ck already has packages for most CPUs

rodaz143 · 2016-03-14 19:16:59

Ah damn, is that not set by default? I suppose it wouldn't be too difficult to reinstall it from the AUR and add that to the PKGBUILD
But in general, I didn't know -mtune exists.

macstar3000 · 2016-03-14 19:17:29

i used linux-lqx before switching over to linux-ck and no complaints here. however i wonder about the version number 4.3.6.1 still when 4.4.x is out or is the numbering not identical?

ugjka · 2016-03-14 19:19:06

I believe you need this patch if you are building yourself https://github.com/graysky2/kernel_gcc_patch

rodaz143 · 2016-03-14 19:20:32

macstar3000 wrote:

i used linux-lqx before switching over to linux-ck and no complaints here. however i wonder about the version number 4.3.6.1 still when 4.4.x is out or is the numbering not identical?

Oh? I thought I remember checking and the version number was the same as the mainline kernel

ugjka wrote:

I believe you need this patch if you are building yourself https://github.com/graysky2/kernel_gcc_patch

Is adding that command line parameter not enough?

macstar3000 · 2016-03-14 19:24:36

rodaz143 wrote:

macstar3000 wrote:
i used linux-lqx before switching over to linux-ck and no complaints here. however i wonder about the version number 4.3.6.1 still when 4.4.x is out or is the numbering not identical?
Oh? I thought I remember checking and the version number was the same as the mainline kernel

[~] uname -a
Linux AMD 4.3.6-1-ck #1 SMP PREEMPT Fri Feb 19 19:38:19 EST 2016 x86_64 GNU/Linux

is it just me or is it generally lagging behind?

graysky · 2016-03-14 19:25:03

See the comments in the PKGBUILD itself... you want to enable the nconfig it sounds like.

rodaz143 · 2016-03-14 19:27:41

macstar3000 wrote:

[~] uname -a
Linux AMD 4.3.6-1-ck #1 SMP PREEMPT Fri Feb 19 19:38:19 EST 2016 x86_64 GNU/Linux
is it just me or is it generally lagging behind?

Oh, alright. I didn't notice that.

graysky wrote:

See the comments in the PKGBUILD itself... you want to enable the nconfig it sounds like.

I'll look into that. The only part of the PKGBUILD I looked into was the BFQ_enable variable.

Roberth · 2016-03-14 20:20:00

macstar3000 wrote:

rodaz143 wrote:
macstar3000 wrote:
i used linux-lqx before switching over to linux-ck and no complaints here. however i wonder about the version number 4.3.6.1 still when 4.4.x is out or is the numbering not identical?
Oh? I thought I remember checking and the version number was the same as the mainline kernel
[~] uname -a
Linux AMD 4.3.6-1-ck #1 SMP PREEMPT Fri Feb 19 19:38:19 EST 2016 x86_64 GNU/Linux
is it just me or is it generally lagging behind?

The patches hasn't been updated to 4.4 yet.

graysky · 2016-03-14 20:22:01

Roberth wrote:

The patches hasn't been updated to 4.4 yet.

Correct. CK needs to release the patchset for 4.4 but it is more likely it will occur for 4.5 since it has been released today.

Roberth · 2016-03-14 20:54:00

graysky wrote:

Roberth wrote:
The patches hasn't been updated to 4.4 yet.
Correct. CK needs to release the patchset for 4.4 but it is more likely it will occur for 4.5 since it has been released today.

Do you know why he skipped the 4.4 kernel?

ooo · 2016-03-15 11:59:35

None of ck's cpu schedulers (staricase and BFS) were meant to improve performance per se. They are designed to improve responsiveness and reduce latency especially for desktop use. AFAIK BFS should actually reduce throughput by some degree compared to vanilla kernel. Latest version (467) also has a tunable that allows you to prioritize throughput over latency and vice versa.

I think BFS greatly improves responsiveness on my old low-end laptop, especially with games and audio software, but YMMV.

Roberth wrote:

Do you know why he skipped the 4.4 kernel?

Most likely he's just busy with life. This is not the first time..
If you want BFS for 4.4 kernel, Holger Hoffstätte posted an updated version on ck's blog that has been working for me without a hitch.

rodaz143 · 2016-03-15 20:37:52

Hmm? I always equated responsiveness with performance. Is that not normal? Though I guess if it's at the expense of throughput, that makes sense then.

Last edited by rodaz143 (2016-03-15 20:39:26)

Arch Linux

#1 2016-03-14 18:51:10

Eperiences with Linux-ck?

#2 2016-03-14 19:00:06

Re: Eperiences with Linux-ck?

#3 2016-03-14 19:04:40

Re: Eperiences with Linux-ck?

#4 2016-03-14 19:11:52

Re: Eperiences with Linux-ck?

#5 2016-03-14 19:16:59

Re: Eperiences with Linux-ck?

#6 2016-03-14 19:17:29

Re: Eperiences with Linux-ck?

#7 2016-03-14 19:19:06

Re: Eperiences with Linux-ck?

#8 2016-03-14 19:20:32

Re: Eperiences with Linux-ck?

#9 2016-03-14 19:24:36

Re: Eperiences with Linux-ck?

#10 2016-03-14 19:25:03

Re: Eperiences with Linux-ck?

#11 2016-03-14 19:27:41

Re: Eperiences with Linux-ck?

#12 2016-03-14 20:20:00

Re: Eperiences with Linux-ck?

#13 2016-03-14 20:22:01

Re: Eperiences with Linux-ck?

#14 2016-03-14 20:54:00

Re: Eperiences with Linux-ck?

#15 2016-03-15 11:59:35

Re: Eperiences with Linux-ck?

#16 2016-03-15 20:37:52

Re: Eperiences with Linux-ck?

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