[PlanetCCRMA] FC2.1vP9 - jackstart just quits...

Wed Sep 29 09:46:00 2004

On Wed, 2004-09-29 at 09:33, Mark Knecht wrote:
> This is a bit strange. I'm still quite uncomfortable with Redhat/FC2
> so things are really highly unoptimized. I'll probably send a separate
> not with about 10 questions in it later but I'm off to a meeting soon.
> This is a Compaq R3070us laptop which runs very well under Gentoo
> although I don't have a good low latency kernel there.
> 
> I've modprobed realcap allcaps=1 and then try to run jack. It just
> dies after about 30 seconds, but there are no messages produced from
> the -v option
> 
> [mark@flash mark]$ jackstart -R -v -d alsa -r 44100
> back from read, ret = 1 errno == Success
> getting driver descriptor from /usr/lib/jack/jack_dummy.so
> getting driver descriptor from /usr/lib/jack/jack_alsa.so
> getting driver descriptor from /usr/lib/jack/jack_oss.so
> jackd 0.99.0
> Copyright 2001-2003 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
> registered builtin port type 32 bit float mono audio
> capabilities: = cap_setpcap,cap_ipc_lock,cap_sys_nice,cap_sys_resource+eip
> loading driver ..
> new client: alsa_pcm, id = 1 type 1 @ 0x8058890 fd = -1
> apparent rate = 44100
> creating alsa driver ... hw:0|hw:0|1024|2|44100|0|0|nomon|swmeter|-|32bit
> control device hw:0
> configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
> new buffer size 1024
> -- jack_rechain_graph()
> registered port alsa_pcm:capture_1, offset = 4096
> registered port alsa_pcm:capture_2, offset = 8192
> registered port alsa_pcm:playback_1, offset = 0
> registered port alsa_pcm:playback_2, offset = 0
> ++ jack_rechain_graph():
> client alsa_pcm: internal client, execution_order=0.
> 5319 waiting for signals
> jackd watchdog: timeout - killing jackd
> Aborted
> [mark@flash mark]$
> 
> If I execute the same command but wiggle my USB mouse then things get
> more interesting:
> 
> [mark@flash mark]$ jackstart -R -v -d alsa -r 44100
> back from read, ret = 1 errno == Success
> getting driver descriptor from /usr/lib/jack/jack_dummy.so
> getting driver descriptor from /usr/lib/jack/jack_alsa.so
> getting driver descriptor from /usr/lib/jack/jack_oss.so
> jackd 0.99.0
> Copyright 2001-2003 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
> 
> registered builtin port type 32 bit float mono audio
> capabilities: = cap_setpcap,cap_ipc_lock,cap_sys_nice,cap_sys_resource+eip
> loading driver ..
> new client: alsa_pcm, id = 1 type 1 @ 0x8058890 fd = -1
> apparent rate = 44100
> creating alsa driver ... hw:0|hw:0|1024|2|44100|0|0|nomon|swmeter|-|32bit
> control device hw:0
> configuring for 44100Hz, period = 1024 frames, buffer = 2 periods
> new buffer size 1024
> -- jack_rechain_graph()
> registered port alsa_pcm:capture_1, offset = 4096
> registered port alsa_pcm:capture_2, offset = 8192
> registered port alsa_pcm:playback_1, offset = 0
> registered port alsa_pcm:playback_2, offset = 0
> ++ jack_rechain_graph():
> client alsa_pcm: internal client, execution_order=0.
> 5326 waiting for signals
> load = 0.0258 max usecs: 12.000, spare = 23207.000
> load = 0.0388 max usecs: 12.000, spare = 23207.000
> load = 0.0431 max usecs: 11.000, spare = 23208.000
> load = 0.0517 max usecs: 14.000, spare = 23205.000
> load = 0.0538 max usecs: 13.000, spare = 23206.000
> load = 0.0549 max usecs: 13.000, spare = 23206.000
> load = 0.0641 max usecs: 17.000, spare = 23202.000
> delay of 64785.000 usecs exceeds estimated spare time of 23202.000; restart ...
> load = 0.0686 max usecs: 17.000, spare = 23202.000
> load = 0.0623 max usecs: 13.000, spare = 23206.000
> load = 0.0635 max usecs: 15.000, spare = 23204.000
> load = 0.0597 max usecs: 13.000, spare = 23206.000
> load = 0.0622 max usecs: 15.000, spare = 23204.000
> load = 0.0677 max usecs: 17.000, spare = 23202.000
> load = 0.0640 max usecs: 14.000, spare = 23205.000
> load = 0.0621 max usecs: 14.000, spare = 23205.000  <---stopped wiggling
> jackd watchdog: timeout - killing jackd
> Killed
> [mark@flash mark]$

This would seem to suggest some problem with interrupts coming from the
soundcard. For some weird reasons moving the mouse must be enabling
interrupts from the soundcard, stopping the movements stall the
interrupts again and the jack watchdog timer kills everything. 

This is definitely a problem with the P9 kernel in your hardware. 

BTW, don't bother optimizing the number of services or processes running
in your machine. If Jack runs with realtime priority it should not
really matter. 

> Now, there are a huge number of processes running. I've seen artsd
> start a couple of times and block Jack. I have much to do to give KDE
> a chance, I think, but I do not know what to think of this operation.
> 
> I did set the THREADED option to 0 as per the setup email. Seems like
> possibly that's not a good idea? Not sure at all.

You could turn that to "1" just to test if it is a problem. 

But I would try with the other experimental kernels if you are curious
enough. Just yesterday I released R9, a more recent build with a more
recent voluntary preemption patch. 

-- Fernando