Atte André Jensen a écrit :
Hi
I trying out ubuntu with ubuntustudio kernel. In debian I always set the
priority of the IRQ's using
chrt -f -p 85 `pidof "IRQ 8"`
However that doesn't work in ubuntu. The reason is that there seems to
be no process named "IRQ 8":
atte@ajstrup:~$ ps aux | grep -i IRQ
root 3 0.0 0.0 0 0 ? SN 13:43 0:00
[ksoftirqd/0]
atte 6274 0.0 0.0 2884 772 pts/0 R+ 13:51 0:00 grep -i
irq
Hi,
Your ubuntu kernel doesn't support this feature, to be sure try to look
at /proc/config.gz
zcat /proc/config.gz | grep PREEMPT
You must have something like this :
CONFIG_PREEMPT_HARDIRQS=y
It appears that the default kernel used by Ubuntu studio
(linux-image-lowlatency) is not patched against the Ingo's RT patch
(required to do what you want)
http://www.mail-archive.com/debian-multimedia@xxxxxxxxxxxxxxxx/msg01756.html
The RT kernel package seems to be linux-image-2.6.21-1-multimedia-486
<http://apt.64studio.com/64studio/testing/pool/main/l/linux-2.6/linux-image-2.6.21-1-multimedia-486_2.6.21-2_i386.deb>
David C.
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