Re: [sched] 143e1e28cb4: +17.9% aim7.jobs-per-min, -9.7% hackbench.throughput

From: Peter Zijlstra
Date: Tue Aug 12 2014 - 02:42:21 EST


On Tue, Aug 12, 2014 at 09:29:19AM +0530, Preeti U Murthy wrote:
> On 08/11/2014 07:03 PM, Peter Zijlstra wrote:
> >
> > Now I think I see why this is; we've reduced load balancing frequency
> > significantly on this machine due to:
>
> We have also changed the value of busy_factor to 32 from 64 across all
> domains. This would contribute to increased frequency of load balancing?

Not enough to offset the changes in min/max. Lowering it makes sense
because we've increased min/max for most situations.

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