Re: 2.6.9-rc1-mm1

[Con Kolivas]

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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