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SubjectRe: [PATCH 0/4] delayacct: save max CPU/IO/SWAP/RECLAIM delays
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On Mon, 2011-11-28 at 17:44 -0500, Satoru Moriya wrote:
> In the latency sensitive systems, we usually focus on the worst latency.
> And so, it is useful to save max delays into the per-task delay
> accounting functionality.
>
> Example output:
> (on 100 concurrent dd reading sparse files w/ 1 dd writing a file)
>
> CPU count real total virtual total delay total delay_max delay average
> 222 45993008 74603882 7637295 3691858 0.034ms
> IO count delay total delay max delay average
> 2 21812073 12728672 10ms
> SWAP count delay total delay max delay average
> 0 0 0 0ms
> RECLAIM count delay total delay_max delay average
> 2 348488 211985 0ms
>
> Any comments are welcome.

No!!!

Linus told us to be bastards, so there you have it.

There's way too many different accounting crap thingies around. And now
I get a patch without any justification what so ever. So no, piss off.


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