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

[Florian Schmidt]

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/