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

[Andrew Morton]

"Martin J. Bligh" <mbligh@xxxxxxxxxxx> wrote:
>
> SDET 8  (see disclaimer)
>                             Throughput    Std. Dev
>                      2.6.7       100.0%         0.2%
>                  2.6.8-rc2       100.2%         1.0%
>              2.6.8-rc2-mm2       117.4%         0.9%
> 
>  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?

I don't expect we'll be merging a new CPU scheduler into mainline any time
soon, but we should work to understand where this improvement came from,
and see if we can get the mainline scheduler to catch up.
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