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SubjectRe: 2.6.8-rc2-mm2 performance improvements (scheduler?)

* Martin J. Bligh <mbligh@aracnet.com> wrote:

> >> SDET 16 (see disclaimer)
> >> Throughput Std. Dev
> >> 2.6.7 100.0% 0.3%
> >> 2.6.8-rc2 99.5% 0.3%
> >> 2.6.8-rc2-mm2 118.5% 0.6%
> >
> > hum, interesting. Can Con's changes affect the inter-node and inter-cpu
> > balancing decisions, or is this all due to caching effects, reduced context
> > switching etc?

Martin, could you try 2.6.8-rc2-mm2 with staircase-cpu-scheduler
unapplied a re-run at least part of your tests?

there are a number of NUMA improvements queued up on -mm, and it would
be nice to know what effect these cause, and what effect the staircase
scheduler has.

Ingo
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