Re: wiki page (was: Re: [linux-audio-user] dipping toes in 2.6 waters)

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Subject: Re: wiki page (was: Re: [linux-audio-user] dipping toes in 2.6 waters)
From: Florian Schmidt (mista.tapas_AT_gmx.net)
Date: Tue Aug 10 2004 - 00:31:12 EEST

On Mon, 09 Aug 2004 17:08:57 -0400
Lee Revell <rlrevell_AT_joe-job.com> wrote:

> OK. I am going to plug the book however because it's so good:
> http://www.amazon.com/exec/obidos/tg/detail/-/0131019082?v=glance.

It really looks good :)

>
> > This seems to be not true for the threaded IRQ handlers in VP [top
> > extract]:
> >
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> > 118 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 IRQ 5
> >
> >
> > mango:~# chrt -p 118
> > pid 118's current scheduling policy: SCHED_OTHER
> > pid 118's current scheduling priority: 0
> >
> > Or do chrt and top print wrong infos? Or do i just read them wrong?
> > I'm especially amazed about the SCHED_OTHER.
> >
>
> You are correct, they run at the same elevated priority as all kernel
> threads, not higher. This would explain why X activity can delay the
> interrupt handlers with the default settings - on Debian the X server
> runs at nice -10. I am pretty sure that one patch series (-L or -M)
> ran the interrupt threads reniced to -51.

I have sent a mail to Ingo asking for clarification.

Flo 

-- 
Palimm Palimm!
http://affenbande.org/~tapas/

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