On Wed, 2007-10-24 at 15:59 +0300, Chuckk Hubbard wrote: > Hi doc, thanks for the guess. sudo chrt does work, though. I'm > supposed to not need it with the rt-patched kernel, which allows > non-root users to set high priorities. Not exactly right. The rt-patched kernel (Ingo's patches) only optimizes the max latency paths in the kernel. Other software is what allows non-root users to use SCHED_FIFO scheduling. There are several options, the current one is /etc/security/limits.conf through PAM, there are others. -- Fernando > On 10/24/07, Dragan Noveski <perodog@xxxxxxx> wrote: > chuckk, i can only try to guess. > perhaps sudo on your system is not allowed to do chrt? > on my system i have the file /etc/sudoers containing this two > important > lines: > > root ALL=(ALL) ALL > nowhiskey ALL=NOPASSWD: ALL > > don't know if it could be the root of the problem, because if > so, i > would expect something like 'operation not permitted' error, > but who knows. > > > cheers, > doc > > > > My kernel has: > > # CONFIG_PREEMPT_NONE is not set > > # CONFIG_PREEMPT_VOLUNTARY is not set > > # CONFIG_PREEMPT_DESKTOP is not set > > CONFIG_PREEMPT_RT=y > > CONFIG_PREEMPT=y > > CONFIG_PREEMPT_SOFTIRQS=y > > CONFIG_PREEMPT_HARDIRQS=y > > CONFIG_PREEMPT_BKL=y > > # CONFIG_CLASSIC_RCU is not set > > CONFIG_PREEMPT_RCU=y > > > > /etc/security/limits.conf has: > > @audio - nice -10 > > @audio - rtprio 99 > > @audio - memlock 4000000 (someone on the > jack list > > suggested that my previous value "unlimited" was not > recognized, so I > > stuck this in but no change) > > > > and user "chuckk" is in group "audio". > > > > Lastly, the output from my script when the second sudo chrt > line is > > commented out: > > ------------------------------ > > pid 684's current scheduling policy: SCHED_FIFO > > pid 684's current scheduling priority: 82 > > jackd 0.103.0 > > Copyright 2001-2005 Paul Davis and others. > > jackd comes with ABSOLUTELY NO WARRANTY > > This is free software, and you are welcome to redistribute > it > > under certain conditions; see the file COPYING for details > > > > JACK compiled with System V SHM support. > > pid 5132's current scheduling policy: SCHED_OTHER > > pid 5132's current scheduling priority: 0 > > loading driver .. > > Enhanced3DNow! detected > > SSE2 detected > > apparent rate = 44100 > > creating alsa driver ... hw:0|-|256|2|44100|0|0|nomon > > |swmeter|-|32bit > > control device hw:0 > > configuring for 44100Hz, period = 256 frames, buffer = 2 > periods > > ALSA: final selected sample format for playback: 32bit > little-endian > > ALSA: use 2 periods for playback > > > > -------------------------------------- > > > > Any ideas what I may have missed or misconfigured? > > > > Thanks! > > -Chuckk > > > > > > -- > > http://www.badmuthahubbard.com > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Linux-audio-user mailing list > > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > > > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > > > > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > > > > -- > http://www.badmuthahubbard.com > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
