Re: [Lse-tech] [patch] sched-domain cleanups, sched-2.6.5-rc2-mm2-A3

Andi Kleen
2004-03-30T07:50:09Z

On Tue, 30 Mar 2004 09:15:19 +0200
Ingo Molnar <mingo@elte.hu> wrote:

>
> * Andi Kleen <ak@suse.de> wrote:
>
> > > Andi, could you please try the patch below - this will test whether this
> > > has to do with the rate of balancing between NUMA nodes. The patch
> > > itself is not correct (it way overbalances on NUMA), but it tests the
> > > theory.
> >
> > This works much better, but wildly varying (my tests go from 2.8xCPU
> > to ~3.8x CPU for 4 CPUs. 2,3 CPU cases are ok). A bit more consistent
> > results would be better though.
>
> ok, could you try min_interval,max_interval and busy_factor all with a
> value as 4, in sched.h's SD_NODE_INIT template? (again, only for testing
> purposes.)

I kept the old patch and made these changes. The results are much more
consistent now 3+x CPU. I still get varyations of ~2GB/s, but I had this
with older kernels too.

-Andi