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SubjectRe: call for more SD versus CFS comparisons (was: Re: [ck] Mainline plans)

* Tobias Gerschner <tobias.gerschner@gmail.com> wrote:

> I did run massive_intr.c for 60 secs with increasing nproc (
> 10,20,30,40,50,60) waiting for effects.
>
> Below a small table of the results
>
> 2.6.21.1-cfs-v16
>
> nproc , usability result
>
> 10 , serious frame drops , Firefox hardly recognizes clicked links,
> but still usable
> 20 - 30, usability loss ( somehow under cfs firefox never finished
> user requests like displaying web pages or opening new pages , no
> feedback anymore, sudden changes on the desktop )

ouch! The expected load-testing result under CFS should be something
like this:

http://bhhdoa.org.au/pipermail/ck/2007-June/007817.html

could you send me the output of /proc/sched_debug? (while say a
"massive_intr 20" is running?)

Roughly what hardware do you have? (could you send me your lspci -v
output and dmesg output?)

Ingo
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