Re: Kernel schedulers - ReadList.com

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Kernel schedulers
\ Jason Carson (13 Dec 2007)
. \ Andrey Falko (13 Dec 2007)
. . \ Dan Farrell (14 Dec 2007)
. \ Philip Webb (13 Dec 2007)
. . \ Jason Carson (13 Dec 2007)
. . . \ Hemmann, Volker Armin (13 Dec 2007)
. . . . \ Mick (14 Dec 2007)
. . . . . \ Hemmann, Volker Armin (14 Dec 2007)
. . . \ Joshua Doll (13 Dec 2007)
. . . . \ Hemmann, Volker Armin (13 Dec 2007)
. . . . . \ Joshua Doll (13 Dec 2007)
. . . . . . \ Hemmann, Volker Armin (14 Dec 2007)
. . . \ Andrey Falko (13 Dec 2007)
. \ James (14 Dec 2007)
. . \ Daniel Pielmeier (14 Dec 2007)
. \ James (14 Dec 2007)
. \ forgottenwizard (15 Dec 2007)
. . \ Mick (16 Dec 2007)
. . . \ forgottenwizard (16 Dec 2007)
. . . . \ Mick (17 Dec 2007)
. . . . . \ Hemmann, Volker Armin (17 Dec 2007)
. . . . . \ forgottenwizard (17 Dec 2007)

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Subject:	Re: Kernel schedulers
Group:	Gentoo-user
From:	forgottenwizard
Date:	17 Dec 2007

On 22:11 Mon 17 Dec , Mick wrote:
> On Sunday 16 December 2007, forgottenwizard wrote:
> OK then, I have been using CFQ for the last few days and it 'feels' slower
> (when e.g. I fire up Kmail, Opera and aterm in quick succession) relative to
> anticipatory which I was using before.
> --
> Regards,
> Mick

Without knowing alot of detail about CFQ, the idea itself seems a bit
far-fetched UNLESS it is taking into account time for the head to seek
back and forth, and tries to organize everything into a proper pattern
instead of what could be taking things as they come, giving them all the
same time (meaning multiple reads for longer files), and doing things in
the order in which they are requsted (in other words, spends as much
time seeking as reading).

I think deadline itself is a safer bet unless you are having to read
several long files, and need them all in about the same time (in which
case you should probably be looking into a RAID anyways).

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