25 Feb
2006
25 Feb
'06
9:29 a.m.
On Sat, 25 Feb 2006 02:44:54 -0500
Hector Centeno-Garcia <h.centeno(a)sympatico.ca> wrote:
Hi,
I've been playing around a little with the priority thing. I would like
to understand better the way it works. Looking at the priority of jackd
(running realtime, as user, and with a RT kernel, full-preemption) I
can't figure out why if I start jackd with -P 60 (or any other number >
0) the output of chrt is always:
$ chrt -p (jackd's pid)
pid 8115's current scheduling policy: SCHED_OTHER
pid 8115's current scheduling priority: 0
the relevant excerpt of "man jackd":
-P, --realtime-priority int
When running --realtime, set the scheduler priority to int.
The important part is "When running --realtime".. Usually you call jackd
like this to get a high rt prio:
jackd -R -P 70 ...
BTW: shortcut:
chrt -p `pidof jackd`
or
chrt -p `pidof "IRQ 8"`
etc..
Flo
P.S.: See my site in the signature for some more in depth info.
--
Palimm Palimm!
http://tapas.affenbande.org