Re: Performance of -mm2 and -mm4

[Nick Piggin]

Jesse Barnes wrote:

> On Monday, August 23, 2004 9:58 am, Martin J. Bligh wrote:
>
> > The -mm4 looks more like sched stuff to me (copy_to/from_user, etc),
> > but the -mm2 stuff looks like something else. Buggered if I know what.
> > -mm3 didn't compile cleanly, so I didn't bother, but I prob can if you
> > like.
>
> If you suspect the scheduler, you could try bumping SD_NODES_PER_DOMAIN in 
> kernel/sched.c to a larger value (e.g. the number of nodes in your system).  
> That'll make the scheduler balance more aggressively across the whole system.

Try increasing /proc/sys/kernel/base_timeslice as well.

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