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#1 2013-04-27 15:38:13

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Does -ck packages make a difference for speed?

I'm using a Core i5-2500 and need to run virtualbox all the time; the problem is that it feels slow. I'm considering switching to BFS and use the virtualbox-ck. Can someone with experience tell me how much I might be able to get for the fspeed gain?

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#2 2013-04-27 15:54:00

graysky
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From: /run/user/1000
Registered: 2008-12-01
Posts: 8,523
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Re: Does -ck packages make a difference for speed?

The BFS in -ck packages will give you superior interactivity and potentially minor improvements in some tasks which depend heavily on queuing.  The short answer is, yes.

Suggesting reading:
http://ck.kolivas.org/patches/bfs/bfs-faq.txt
http://repo-ck.com/bench/cpu_schedulers_compared.pdf

Last edited by graysky (2013-04-27 15:54:22)


CPU-optimized Linux-ck packages @ Repo-ck  • AUR packagesZsh and other configs

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#3 2013-04-27 15:58:09

Army
Member
Registered: 2007-12-07
Posts: 1,784

Re: Does -ck packages make a difference for speed?

10% guaranteed!

Honestly, this question is very hard to answer. What about just trying it out? You can use precompiled packages from

[repo-ck]
Server = http://repo-ck.com/$arch

(you should use linux-ck-sandybridge)
and try it out!

Btw, there's no virtualbox-ck, just install

pacman -S virtualbox-ck-host-modules-sandybridge --asdeps

and then install virtualbox from the repos.

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#4 2013-04-27 16:03:27

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Re: Does -ck packages make a difference for speed?

Thanks for your answer. I've actually seen your report on BFS and that was one of the reasons that made curious. I think I'll just try it out myself and see the difference.

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#5 2013-04-27 16:18:56

WonderWoofy
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From: Los Gatos, CA
Registered: 2012-05-19
Posts: 8,412

Re: Does -ck packages make a difference for speed?

Army wrote:

10% guaranteed!
<snip>

Oh, come one Army!  You know it is more like a 11.12942% gaurantee.  Stop being so pessimistic.

@OP, before I realized the awesomeness of systemd --user, I was using graysky's linux-ck-ivybridge kernel as my daily driver.  In my totally non-scientific testing/usage I felt as though it did bring improvments in responsiveness to my system.  Unfortunately the BFS option conflicts with the necessary cgroup settings to make systemd user sessions work.  But I still keep the CK kernel on my machine as a backup, and then if I boot that kernel, I have it set up so that it goes to a custom made graphical-ck.target rather than the normal graphical.target.

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#6 2013-04-27 16:26:13

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Re: Does -ck packages make a difference for speed?

@WonderWoofy What do you mean by 'the awesomeness of systemd --user'? Haven't known about that

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#7 2013-04-27 16:27:24

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Re: Does -ck packages make a difference for speed?

@Army I installed the packages but it seems that bfs is not running.. Do I still need to build BFS from AUR aside from the linux-ck-XXX packages?

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#8 2013-04-27 16:34:45

graysky
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From: /run/user/1000
Registered: 2008-12-01
Posts: 8,523
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Re: Does -ck packages make a difference for speed?

@yulan - If you're booted into the linux-ck kernel, BFS is running. Try:

% dmesg | grep Kolivas
[    0.504605] BFS CPU scheduler v0.428 by Con Kolivas.

Last edited by graysky (2013-04-27 16:35:10)


CPU-optimized Linux-ck packages @ Repo-ck  • AUR packagesZsh and other configs

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#9 2013-04-27 16:40:16

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Re: Does -ck packages make a difference for speed?

@graysky I tried that but it wasn't l listed. What's the right way to boot into linux-ck by the way?

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#10 2013-04-27 16:41:16

Trilby
Forum Moderator
From: Massachusetts, USA
Registered: 2011-11-29
Posts: 13,804
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Re: Does -ck packages make a difference for speed?

Have you adjusted your bootloader to boot the new kernel?


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#11 2013-04-27 16:46:17

graysky
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From: /run/user/1000
Registered: 2008-12-01
Posts: 8,523
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Re: Does -ck packages make a difference for speed?

yulan6248 wrote:

@graysky I tried that but it wasn't l listed. What's the right way to boot into linux-ck by the way?

https://wiki.archlinux.org/index.php/Li … on_Options

Note: As with *any* additional kernel, users will need to manually edit their boot loader's config file to make it aware of the new kernel images. For example, users of GRUB should execute "grub-mkconfig -o /boot/grub/grub.cfg". Syslinux, GRUB-legacy, etc. will need to be modified as well.


CPU-optimized Linux-ck packages @ Repo-ck  • AUR packagesZsh and other configs

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#12 2013-04-27 16:46:25

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Re: Does -ck packages make a difference for speed?

No, I'm really new to kernel stuff to be honest... Am going to google for some wiki or maybe someone can point me a quick way

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#13 2013-04-27 16:54:01

yulan6248
Member
Registered: 2013-04-06
Posts: 28

Re: Does -ck packages make a difference for speed?

@graysky Thanks a lot for your quick reply. Am running it right now and hope it speeds my system smile

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