Date: Tue, 30 Mar 2004 09:48:11 +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
Message-Id: <20040330094811.622af0f4.ak@suse.de>
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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
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