Re: 2.6.9-rc1-mm1

Con Kolivas
2004-08-26T16:40:44Z

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Rafael J. Wysocki wrote:
> On Thursday 26 of August 2004 13:07, Con Kolivas wrote:
>
>>Andrew Morton wrote:
>>
>>>ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc1/2
>>>.6.9-rc1-mm1/
>>>
>>>
>>>- nicksched is still here. There has been very little feedback, except
>>>that it seems to slow some workloads on NUMA.
>>
>>That's because most people aren't interested in a new cpu scheduler for
>>2.6.
>
>
> I am, but I have no benchmarks that give any useful numbers.

That's because there are none for interactivity; you're simply
reinforcing my point.

>>The current one works well enough in most situations and people
>>aren't trying -mm to fix their interactive problems since they are few
>>and far between.
>
>
> Actually, with the current scheduler, updatedb really sucks. It's supposed to
> be a background task, but it hogs IO resources and memory like crazy
> (disclaimer: it's my personal subjective observation).

The cpu scheduler plays almost no part in this. It's the I/O scheduler
and the vm. IOnice will help the former _when it comes out_. Dropping
the swappiness kind of helps the latter; although there are numerous
alternative tweaks appearing for that too.

Cheers,
Con

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