On Sa, 21.07.07 14:03 Atte André Jensen <atte.jensen@xxxxxxxxx> wrote: > 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": I only get processes for IRQ's on -rt patched kernels Maybe ubuntustudio uses a standard patched-to-death ubuntu kernel with hz 1000 and LLD preempt? > 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 > > Whereas on debian I would get: > > atte@ajstrup:~$ ps aux | grep IRQ > root 18 0.2 0.0 0 0 ? S< 13:34 0:00 [IRQ > 9] root 261 0.0 0.0 0 0 ? S< 13:34 0:00 > [IRQ 4] root 286 0.0 0.0 0 0 ? S< 13:34 > 0:00 [IRQ 12] > root 300 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ > 1] root 608 0.0 0.0 0 0 ? S< 13:34 0:00 > [IRQ 11] > root 761 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ > 14] > root 787 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ > 15] > root 1592 0.0 0.0 0 0 ? S< 13:34 0:00 [IRQ > 8] root 1593 0.0 0.0 0 0 ? S< 13:34 0:00 > [IRQ 7] root 1683 0.0 0.0 0 0 ? S< 13:34 > 0:00 [IRQ 10] > atte 4672 0.0 0.0 2848 704 pts/1 R+ 13:41 0:00 grep > IRQ > > I suspect it has something to do with "ksoftirqd" which according to > the man page seems to be a daemon handling irqs. > > http://tapas.affenbande.org/wordpress/?page_id=40 also doesn't seem to > take ksoftirqd into account. > > So my question is: How do I set the priorities in ubuntu? Is it > possible/clever/stupid to get rid og ksoftirqd and get things working > the way I'm used to under debian, and if so how? > > -- > peace, love & harmony > Atte > > http://atte.dk | http://myspace.com/attejensen > http://anagrammer.dk | http://atte.dk/compositions > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user
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