Re: [patch] swap-speedup-2.4.3-B3 (fwd)

[Marcelo Tosatti]

On Thu, 26 Apr 2001, Mike Galbraith wrote:

> On Thu, 26 Apr 2001, Marcelo Tosatti wrote:
> 
> > > (I can get it to under 9 with MUCH extremely ugly tinkering.  I've done
> > > this enough to know that I _should_ be able to do 8 1/2 minutes ~easily)
> >
> > Which kind of changes you're doing to get better performance on this test?
> 
> :)
> 
> 2.4.4.pre7.virgin
> real    11m33.589s
> user    7m57.790s
> sys     0m38.730s
> 
> 2.4.4.pre7.sillyness
> real    9m30.336s
> user    7m55.270s
> sys     0m38.510s

Have you tried to tune SWAP_SHIFT and the priority used inside swap_out()
to see if you can make pte deactivation less aggressive ?

If you get the desired effect tuning those values and you end up with the
conclusion that this tuning is a good change for most "common workloads",
it can be integrated in the main kernel.