Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4]

[Rui Nuno Capela]

Ingo Molnar wrote:
>
>
> i've uploaded -V0.6.3 to the usual place:
>
>     http://redhat.com/~mingo/realtime-preempt/
>
> which fixes two issues:
>
>  - priorities of SCHED_OTHER tasks not getting properly managed, hence
>    they could end up 'starving' other SCHED_OTHER tasks pretty
>    indefinitely. This could possibly solve the 'temporary lockup'
>    problem reported by Mark H Johnson.
>
>  - fixed the 'high load average' bug
>
> i dont know whether this will solve the 'hard lockups' reported though.
> It could solve your problem because the 'find /' kept running so it
> wasnt a hard lockup. I'll keep testing and i'll fix any problem i can
> reproduce myself.
>

OK. Just tested in a hurry with RT-V0.6.4, and it passed three times in a
row my jackd-R + 9*fluidsynth tests, without freezing, so I think the
problem was the 'starvation' one.

OTOH, I can say that the results I'm early reading are really an
improvement. Fewer xruns and smaller delays. Nice.

Cheers.
-- 
rncbc aka Rui Nuno Capela
rncbc@xxxxxxxxx

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/