kernel IO schedulers

[Matthew Carpenter]

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I think mine always says Anticipatory.  I just don't have all that other
garbage.

Net Llama! wrote:
| On 12/31/2004 10:34 AM, Jerry McBride wrote:
|
|>  On Thursday 30 December 2004 14:58, Net Llama! wrote:
|>  > I could be wrong, but I think that in 2.6.10 there's a choice of
|> several
|>  > different schedulers in the kernel:
|>  >
|>  > # IO Schedulers
|>  > #
|>  > CONFIG_IOSCHED_NOOP=y
|>  > CONFIG_IOSCHED_AS=y
|>  > CONFIG_IOSCHED_DEADLINE=y
|>  > CONFIG_IOSCHED_CFQ=y
|>  >
|>  > What I'm wondering is what happens if you chose Y for all of them (as
|>  > above)?
|>  >
|>  > The reason I'm asking is that I did choose Y for all of them, and
|> now in
|>  > 2.6.10 (but not in earlier kernels) i'm getting some horrific
|>  > performance in X (XFCE specifically).  Scrolling in windows is
|> sluggish,
|>  > sometimes even typing gets lagged.  I'm starting to think that I was
|>  > supposed to choose just one of the schedulers, but I'd like some
|> input.
|>
|> Clicking yes, makes them available in the kernel. At boot time, make
|> your scheduler choice as a kernel parameter like:
|>
|>  elevator= [IOSCHED]
|>    Format: {"as"|"cfq"|"deadline"|"noop"}
|>    See Documentation/block/as-iosched.txt
|>    and Documentation/block/deadline-iosched.txt for details.
|>
|> The default scheduler is deadline.
|
|
| OK, thanks.  So i'm using the anticipatory scheduler, which is what I
| thought i was using for previous 2.6.x kernels.  However, performance is
| very noticably not the same (nor as good) as it was for previous 2.6.x
| kernels.
|
| What is everyone else using right now?
|
|

- --
Matthew Carpenter
matt at eisgr.com                          http://www.eisgr.com/

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