Rick Lindsley wrote:
> Ok Andrew, I've attached two patches (which should be applied in order to 
> apply cleanly).  They are separate because they address two different issues.  
> The first, sstat-nosmp, fixes a problem with schedstats when CONFIG_SMP is not 
> defined.
> 
> The second should restore the staircase scheduler so that we can figure out 
> why it's good and whether it can be even better.

Hi

Staircase has had it's timeslice expire in -mm for a while but here is a 
slightly newer version to play with that I diffed against your 
sstat-nosmp (that patch had some minor faults).

It would be interesting to see if setting interactive mode to 0 has any 
effect on your benchmarks and stats. This attached version may see 
slight detriment with the default of 1 (but it also might not).

echo 0 > /proc/sys/kernel/interactive

The compute mode helps some benchmarks I didn't anticipate (like reaim) 
and would also be worth examining.

echo 1 > /proc/sys/kernel/compute


Patches to get mm1 to staircase available here:

http://ck.kolivas.org/patches/2.6/2.6.8/2.6.8-rc3-mm1

Cheers,
Con

Signed-off-by: Con Kolivas <kernel@kolivas.org>