Re: [patch] CFS (Completely Fair Scheduler), v2

[S.ÃaÄlar Onur]

17 Nis 2007 Sal tarihinde, Ingo Molnar ÅunlarÄ yazmÄÅtÄ: 
> > Sorry for delayed response but i just find some free time, do you
> > still want me to test mainline + "parent-runs first" patch or will i
> > drop that one and test v2 which can change default behaviour?
>
> i suspect for now it would be sufficient if you could check the v2
> patch.
>
> if it _works_, please try this:
>
>     echo 0 > /proc/sys/kernel/sched_child_runs_first
>
> this should break Kaffeine again :)
>
> (if it doesnt work then the Kaffeine problem is unrelated to
> child-runs-first.)

OK, i tested both plain -rc7 and -rc7 + CFSv2 with while 
sched_child_runs_first enabled/disabled.

I'm always using same video file and try to reproduce freeze with constantly 
pressing forward/backward buttons. With CFS 2-3 forward/backward attempt 
reproduces this behaviour. 

And here are the results.

Mainline still has no issues with both xine-lib/kaffeine and xine-ui 
(kaffeine-0.8.4, xine-lib-1.1.5 [both xcb enabled], xine-ui-0.99.4). I really 
try hard to reproduce the freeze, but i can't...

And CFSv2 still fails for both child_runs_first and parent_runs_first cases 
with same strace output (FUTEX_WAIT).

If you want me to test something else just ask please :) 

Cheers
-- 
S.ÃaÄlar Onur <caglar@xxxxxxxxxxxxx>
http://cekirdek.pardus.org.tr/~caglar/

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!

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