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

Rui Nuno Capela
2004-11-01T16:48:47Z

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@rncbc.org