Date: Tue, 30 Mar 2004 09:07:16 +0200
From: Andi Kleen <ak@suse.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: nickpiggin@yahoo.com.au, jun.nakajima@intel.com, ricklind@us.ibm.com,
       linux-kernel@vger.kernel.org, akpm@osdl.org, kernel@kolivas.org,
       rusty@rustcorp.com.au, anton@samba.org, lse-tech@lists.sourceforge.net,
       mbligh@aracnet.com
Subject: Re: [Lse-tech] [patch] sched-domain cleanups,
 sched-2.6.5-rc2-mm2-A3
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On Tue, 30 Mar 2004 08:40:15 +0200
Ingo Molnar <mingo@elte.hu> wrote:

> 
> * Andi Kleen <ak@suse.de> wrote:
> 
> > > So both -mm5 and Ingo's sched.patch are much worse than
> > > what 2.4 and 2.6 get?
> > 
> > Yes (2.6 vanilla and 2.4-aa at that, i haven't tested 2.4-vanilla)
> > 
> > Ingo's sched.patch makes it a bit better (from 1x CPU to 1.5-1.7xCPU),
> > but still much worse than the max of 3.7x-4x CPU bandwidth.
> 
> 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.

-Andi
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