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SubjectRe: [patch 00/17] CFS Bandwidth Control v7.1
On Wed, Jul 06, 2011 at 10:30:36PM -0700, Paul Turner wrote:
> Hi all,
>
> Please find attached an incremental revision on v7 of bandwidth control.
>
> The only real functional change is an improvement to update shares only as we
> leave a throttled state. The remainder is largely refactoring, expansion of
> comments, and code clean-up.
>
> Hidetoshi Seto and Hu Tao have been kind enough to run performance benchmarks
> against v7 measuring the scheduling path overheads versus pipe-test-100k.
> Results can be found at:
>
> https://lkml.org/lkml/2011/6/24/10
> https://lkml.org/lkml/2011/7/4/347
>
> The summary results (from Hu Tao's most recent run) are:
> cycles instructions branches
> -------------------------------------------------------------------------------------------------------------------
> base 7,526,317,497 8,666,579,347 1,771,078,445
> +patch, cgroup not enabled 7,610,354,447 (1.12%) 8,569,448,982 (-1.12%) 1,751,675,193 (-0.11%)
> +patch, 10000000000/1000(quota/period) 7,856,873,327 (4.39%) 8,822,227,540 (1.80%) 1,801,766,182 (1.73%)
> +patch, 10000000000/10000(quota/period) 7,797,711,600 (3.61%) 8,754,747,746 (1.02%) 1,788,316,969 (0.97%)
> +patch, 10000000000/100000(quota/period) 7,777,784,384 (3.34%) 8,744,979,688 (0.90%) 1,786,319,566 (0.86%)
> +patch, 10000000000/1000000(quota/period) 7,802,382,802 (3.67%) 8,755,638,235 (1.03%) 1,788,601,070 (0.99%)
> ------------------------------------------------------------------------------------------------------------------

Hi Paul,

I'm sorry these data are got by a config with some debug options on.
I've re-tested with a fine config, see

https://lkml.org/lkml/2011/7/6/516

--
Thanks,
Hu Tao


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