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#1 2007-10-11 10:22:19

lenni
Member
From: London, UK
Registered: 2007-09-21
Posts: 95

Will CFS make a noticable difference?

Just wanted to know if the new Completely Fair Scheduler that's in the just released 2.6.23 kernel will really make a noticeable difference for desktop users.

Has anyone got experiences to share?

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#2 2007-10-11 10:47:38

foxbunny
Member
From: Serbia
Registered: 2006-10-31
Posts: 759
Website

Re: Will CFS make a noticable difference?

I have used both CK SD scheduler, and CFS. SD was slightly faster and for small details like loading icons into KDE (or GNOME) menu, it did much better than CFS. However, I haven't tweaked the defaults for CFS so I don't know if CFS can be made to perform better. Anyway, both schedulers are way better than what Linux used to offer.

As a side note, the 2.6.23-MM was a bit unstable on my PC so I didn't use it for long.

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#3 2007-10-11 21:39:33

Gullible Jones
Member
Registered: 2004-12-29
Posts: 4,863

Re: Will CFS make a noticable difference?

Yeah... Flash videos stutter much more and much more often when rendering web pages at the same time. System feels more responsive otherwise though, and I don't doubt that part of the problem is that Flashplugin is doing something stupid.

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#4 2007-10-11 22:27:45

skottish
Forum Fellow
From: Here
Registered: 2006-06-16
Posts: 7,931

Re: Will CFS make a noticable difference?

As I mentioned in another thread, my first Blender tests seem to show that it renders images around 2.5% faster than with the 2.6.22-ck kernel. While not exactly 'desktop' usage, it does make a difference. I also noticed a speed up in web page rendering after I upgraded, but that may be unrelated.

Last edited by skottish (2007-10-11 22:29:21)

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#5 2007-10-12 03:52:20

foxbunny
Member
From: Serbia
Registered: 2006-10-31
Posts: 759
Website

Re: Will CFS make a noticable difference?

Apart from the CFS, the changelog mentions a host of other changes, so, yeah, overall, the new kernel is supposed to be faster (if not more responsive) than the 2.6.22-ck kernel.

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#6 2007-10-12 08:42:54

stylopath
Member
Registered: 2007-07-26
Posts: 112

Re: Will CFS make a noticable difference?

When is the 2.6.23 supposed to hit the repos ?

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#7 2007-10-12 09:12:00

Ramses de Norre
Member
From: Leuven - Belgium
Registered: 2007-03-27
Posts: 1,289

Re: Will CFS make a noticable difference?

2.6.23-2 is currently in testing, so as soon as all bugs are resolved it will be moved to current.

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#8 2007-10-12 09:34:26

cybe-arch
Member
Registered: 2007-09-02
Posts: 53

Re: Will CFS make a noticable difference?

You mean "core", Ramses de Norre wink

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#9 2007-10-12 10:08:29

stylopath
Member
Registered: 2007-07-26
Posts: 112

Re: Will CFS make a noticable difference?

Thanks! Since i had various problems with the "new" xorg from testing i disabled the testing repo (i prefer it stable big_smile) so i didn't notice that.
Another time i see that Arch is really fast when it comes to new packages smile

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#10 2007-10-12 10:15:00

Ramses de Norre
Member
From: Leuven - Belgium
Registered: 2007-03-27
Posts: 1,289

Re: Will CFS make a noticable difference?

Old habits die slowly wink

cybe-arch wrote:

You mean "core", Ramses de Norre wink

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#11 2007-10-12 11:12:30

cybe-arch
Member
Registered: 2007-09-02
Posts: 53

Re: Will CFS make a noticable difference?

I've been looking around, but can't find it.
Where can i follow package status of 2.6.23-2 and registered bugs?

Is the info in http://bugs.archlinux.org all there is?

Last edited by cybe-arch (2007-10-12 11:15:41)

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#12 2007-10-12 11:39:50

shining
Pacman Developer
Registered: 2006-05-10
Posts: 2,043

Re: Will CFS make a noticable difference?

cybe-arch wrote:

I've been looking around, but can't find it.
Where can i follow package status of 2.6.23-2 and registered bugs?

Is the info in http://bugs.archlinux.org all there is?

Yep, there is mostly the bug tracker, but also the arch-dev-public ML :
http://archlinux.org/pipermail/arch-dev … 02133.html


pacman roulette : pacman -S $(pacman -Slq | LANG=C sort -R | head -n $((RANDOM % 10)))

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#13 2007-10-25 00:20:27

dhave
Arch Linux f@h Team Member
From: Outside the matrix.
Registered: 2005-05-15
Posts: 1,110

Re: Will CFS make a noticable difference?

Does CFS need to be enabled as a kernel option (which I haven't found yet), or is it the default scheduler with 2.6.23? Thanks.

Later edit: From a bit of googling, I'm gather that there's just one process scheduler, and CFS is the new default. If anyone wants to confirm that, I'd be grateful.

Last edited by dhave (2007-10-25 00:24:01)


Donate to Arch!

Tired? There's a nap for that. --anonymous

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#14 2007-10-25 00:23:26

lucke
Member
From: Poland
Registered: 2004-11-30
Posts: 4,018

Re: Will CFS make a noticable difference?

It is the default and the only scheduler in .23.

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#15 2007-10-25 00:24:29

dhave
Arch Linux f@h Team Member
From: Outside the matrix.
Registered: 2005-05-15
Posts: 1,110

Re: Will CFS make a noticable difference?

lucke wrote:

It is the default and the only scheduler in .23.

Thanks, lucke.


Donate to Arch!

Tired? There's a nap for that. --anonymous

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#16 2007-10-25 08:42:56

gummibaerchen
Member
Registered: 2007-07-20
Posts: 109

Re: Will CFS make a noticable difference?

foxbunny wrote:

I have used both CK SD scheduler, and CFS. SD was slightly faster and for small details like loading icons into KDE (or GNOME) menu, it did much better than CFS.

Hmm, I can't say sure when it started but recently the creation of thumbnails on my Desktop (GNOME) takes _very_ long.

I have to mouse-over the icons, and then count up to five or so, 'till I can see them.

Could that be an issue with CFS?

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#17 2007-10-25 10:39:13

.:B:.
Forum Fellow
Registered: 2006-11-26
Posts: 5,819

Re: Will CFS make a noticable difference?

Don't think so. Over all, CFS feels a lot smoother than 2.6.22.x.


Got Leenucks? :: Arch: Power in simplicity :: Get Counted! Registered Linux User #392717 :: Blog thingy

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#18 2007-10-25 16:49:06

mic64
Member
Registered: 2005-03-03
Posts: 173

Re: Will CFS make a noticable difference?

HI

I really can't see any difference between .22 and .23.
Under high CPU Load system feels still very slow and unresponsive.

Last edited by mic64 (2007-10-25 16:49:40)

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