jackd and xruns

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jackd and xruns

Orm Finnendahl
Hi all,

hope it's o.k. to post here.

I installed a fresh Debian Sarge on an AMD Duron machine. The
soundcard works well with ALSA and OSS. Starting jackd results in
abundant xruns at regular intervals, independent of period or nperiod
size (with higher p the xruns occur in slower pulses). Applications
like pd or ardour work internally (recording sounds from pd with
ardour) despite the xruns but no sound comes out of the physical
outputs. Playing sound through ALSA and OSS with pd works without any
noticeable clicks.

Jack's fifos are on a ramfs with 100 MB, top indicates 141 MB of free
space and no swap used. The harddrive is formatted with an ext3
filesystem.

I compiled jack-100 and jack-0.99 with the same results.

Following is the output of lsmod and mount. The jack fifos are located
at /tmp/jack-0...

Any ideas?

--
Orm

snd_seq_oss            34368  0
snd_seq_midi            8608  0
snd_seq_midi_event      7936  2 snd_seq_oss,snd_seq_midi
snd_seq                53648  5 snd_seq_oss,snd_seq_midi,snd_seq_midi_event
reiserfs              248528  1
nls_cp437               5760  0
isofs                  37752  0
ipv6                  262468  16
nfsd                  201440  8
exportfs                6528  1 nfsd
lockd                  64520  2 nfsd
sunrpc                152612  2 nfsd,lockd
appletalk              36340  20
floppy                 60304  0
parport_pc             36932  0
parport                41544  1 parport_pc
analog                 11872  0
evdev                   9600  0
eth1394                21768  0
pcspkr                  3688  0
rtc                    12728  0
ohci1394               35588  0
ieee1394              111352  2 eth1394,ohci1394
8139cp                 20672  0
snd_intel8x0           36140  0
snd_ac97_codec         69508  1 snd_intel8x0
snd_pcm_oss            54376  0
snd_mixer_oss          19904  1 snd_pcm_oss
snd_pcm                97480  2 snd_intel8x0,snd_pcm_oss
snd_timer              25668  2 snd_seq,snd_pcm
snd_page_alloc         11720  2 snd_intel8x0,snd_pcm
gameport                4736  2 analog,snd_intel8x0
snd_mpu401_uart         8000  1 snd_intel8x0
snd_rawmidi            25316  2 snd_seq_midi,snd_mpu401_uart
snd_seq_device          8264  3 snd_seq_oss,snd_seq_midi,snd_rawmidi
snd                    57380  13 snd_seq_oss,snd_seq_midi,snd_seq_midi_event,snd
_seq,snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd
_mpu401_uart,snd_rawmidi,snd_seq_device
soundcore              10400  1 snd
shpchp                100716  0
pciehp                 97388  0
pci_hotplug            34352  2 shpchp,pciehp
sis_agp                 8260  1
agpgart                34536  1 sis_agp
ohci_hcd               21380  0
usbcore               118308  3 ohci_hcd
8139too                26112  0
mii                     5184  2 8139cp,8139too
capability              4616  0
commoncap               7296  1 capability
psmouse                20232  0
ide_cd                 42528  0
cdrom                  40284  1 ide_cd
ext3                  126760  1
jbd                    61848  1 ext3
mbcache                 9284  1 ext3
ide_generic             1472  0
sis5513                16776  1
ide_disk               19264  5
ide_core              138724  4 ide_cd,ide_generic,sis5513,ide_disk
unix                   28660  50
font                    8448  0
vesafb                  6688  0
cfbcopyarea             3840  1 vesafb
cfbimgblt               3072  1 vesafb
cfbfillrect             3712  1 vesafb
ormserv:~# mount
/dev/hda1 on / type ext3 (rw,errors=remount-ro)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/shm on /tmp type tmpfs (rw,size=100m)
usbfs on /proc/bus/usb type usbfs (rw)
tmpfs on /dev type tmpfs (rw,size=10M,mode=0755)
/dev/hdc1 on /mnt/hdc1 type reiserfs (rw)
ormserv:~#


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Re: jackd and xruns

David Mulcahy
You might want to check out this page
http://tapas.affenbande.org/?page_id=21
to get realtime scheduling support.

Dave

On Monday 05 September 2005 11:32, Orm Finnendahl wrote:

> Hi all,
>
> hope it's o.k. to post here.
>
> I installed a fresh Debian Sarge on an AMD Duron machine. The
> soundcard works well with ALSA and OSS. Starting jackd results in
> abundant xruns at regular intervals, independent of period or nperiod
> size (with higher p the xruns occur in slower pulses). Applications
> like pd or ardour work internally (recording sounds from pd with
> ardour) despite the xruns but no sound comes out of the physical
> outputs. Playing sound through ALSA and OSS with pd works without any
> noticeable clicks.
>
> Jack's fifos are on a ramfs with 100 MB, top indicates 141 MB of free
> space and no swap used. The harddrive is formatted with an ext3
> filesystem.
>
> I compiled jack-100 and jack-0.99 with the same results.
>
> Following is the output of lsmod and mount. The jack fifos are located
> at /tmp/jack-0...
>
> Any ideas?
>
> --
> Orm
>
> snd_seq_oss            34368  0
> snd_seq_midi            8608  0
> snd_seq_midi_event      7936  2 snd_seq_oss,snd_seq_midi
> snd_seq                53648  5 snd_seq_oss,snd_seq_midi,snd_seq_midi_event
> reiserfs              248528  1
> nls_cp437               5760  0
> isofs                  37752  0
> ipv6                  262468  16
> nfsd                  201440  8
> exportfs                6528  1 nfsd
> lockd                  64520  2 nfsd
> sunrpc                152612  2 nfsd,lockd
> appletalk              36340  20
> floppy                 60304  0
> parport_pc             36932  0
> parport                41544  1 parport_pc
> analog                 11872  0
> evdev                   9600  0
> eth1394                21768  0
> pcspkr                  3688  0
> rtc                    12728  0
> ohci1394               35588  0
> ieee1394              111352  2 eth1394,ohci1394
> 8139cp                 20672  0
> snd_intel8x0           36140  0
> snd_ac97_codec         69508  1 snd_intel8x0
> snd_pcm_oss            54376  0
> snd_mixer_oss          19904  1 snd_pcm_oss
> snd_pcm                97480  2 snd_intel8x0,snd_pcm_oss
> snd_timer              25668  2 snd_seq,snd_pcm
> snd_page_alloc         11720  2 snd_intel8x0,snd_pcm
> gameport                4736  2 analog,snd_intel8x0
> snd_mpu401_uart         8000  1 snd_intel8x0
> snd_rawmidi            25316  2 snd_seq_midi,snd_mpu401_uart
> snd_seq_device          8264  3 snd_seq_oss,snd_seq_midi,snd_rawmidi
> snd                    57380  13
> snd_seq_oss,snd_seq_midi,snd_seq_midi_event,snd
> _seq,snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_time
>r,snd _mpu401_uart,snd_rawmidi,snd_seq_device
> soundcore              10400  1 snd
> shpchp                100716  0
> pciehp                 97388  0
> pci_hotplug            34352  2 shpchp,pciehp
> sis_agp                 8260  1
> agpgart                34536  1 sis_agp
> ohci_hcd               21380  0
> usbcore               118308  3 ohci_hcd
> 8139too                26112  0
> mii                     5184  2 8139cp,8139too
> capability              4616  0
> commoncap               7296  1 capability
> psmouse                20232  0
> ide_cd                 42528  0
> cdrom                  40284  1 ide_cd
> ext3                  126760  1
> jbd                    61848  1 ext3
> mbcache                 9284  1 ext3
> ide_generic             1472  0
> sis5513                16776  1
> ide_disk               19264  5
> ide_core              138724  4 ide_cd,ide_generic,sis5513,ide_disk
> unix                   28660  50
> font                    8448  0
> vesafb                  6688  0
> cfbcopyarea             3840  1 vesafb
> cfbimgblt               3072  1 vesafb
> cfbfillrect             3712  1 vesafb
> ormserv:~# mount
> /dev/hda1 on / type ext3 (rw,errors=remount-ro)
> proc on /proc type proc (rw)
> sysfs on /sys type sysfs (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw)
> /dev/shm on /tmp type tmpfs (rw,size=100m)
> usbfs on /proc/bus/usb type usbfs (rw)
> tmpfs on /dev type tmpfs (rw,size=10M,mode=0755)
> /dev/hdc1 on /mnt/hdc1 type reiserfs (rw)
> ormserv:~#
>
>
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
> Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf
> _______________________________________________
> Jackit-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/jackit-devel


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Re: jackd and xruns

Orm Finnendahl
Am 05. September 2005, 11:51 Uhr (+0100) schrieb David Mulcahy:
> You might want to check out this page
> http://tapas.affenbande.org/?page_id=21
> to get realtime scheduling support.

I forgot to mention that jackd is started by root with the -R flag.

--
Orm


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Re: jackd and xruns

julien Brulé
hi,

you need maybe to put in your /etc/fstab the option noatime for your ext3
partition.....
or need to tweak your hd with hdparm.....
or play with frames/period and samplerate of jackd.....
you don't need to start jackd as root if you have a patched pam system or the
realtime-lsm module
you must have a look at
http://ccrma.stanford.edu/planetccrma/software/installtwosix.html#SECTION000201400000000000000
i hope that it will help you
cheers


Le Lundi 5 Septembre 2005 12:59, Orm Finnendahl a écrit :

> Am 05. September 2005, 11:51 Uhr (+0100) schrieb David Mulcahy:
> > You might want to check out this page
> > http://tapas.affenbande.org/?page_id=21
> > to get realtime scheduling support.
>
> I forgot to mention that jackd is started by root with the -R flag.
>
> --
> Orm
>
>
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
> Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf
> _______________________________________________
> Jackit-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/jackit-devel


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Re: jackd and xruns

Lee Revell
In reply to this post by Orm Finnendahl
On Mon, 2005-09-05 at 12:32 +0200, Orm Finnendahl wrote:
> Hi all,
>
> hope it's o.k. to post here.
>
> I installed a fresh Debian Sarge on an AMD Duron machine.

Sarge has the NPTL bug.  This won't work.

Try unstable.

Lee



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Re: jackd and xruns

Orm Finnendahl
Am 05. September 2005, 11:43 Uhr (-0400) schrieb Lee Revell:
>
> Sarge has the NPTL bug.  This won't work.
>
> Try unstable.

Thanx a lot!

--
Orm


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Re: jackd and xruns

David Mulcahy
In reply to this post by Orm Finnendahl
Actually reading this again I think you must be having problems with:- Where
jack temp files are located.  They are located at /tmp/jack-0... but mount
has tmpfs mounted at /dev/shm (same as my deb) but you also have tmpfs
on /dev ?  I havent compiled jack for a long time but I think you still have
to pass the tmpfs location at compile time.

A long time back somone reported that mounting tmpfs twice caused jack to
produce xruns but you are not using tmpfs?

What kernel are you using?  With a decent kernel bog standard debian jack
works excellent for me.  

Dave

On Monday 05 September 2005 11:32, Orm Finnendahl wrote:

> Hi all,
>
> hope it's o.k. to post here.
>
> I installed a fresh Debian Sarge on an AMD Duron machine. The
> soundcard works well with ALSA and OSS. Starting jackd results in
> abundant xruns at regular intervals, independent of period or nperiod
> size (with higher p the xruns occur in slower pulses). Applications
> like pd or ardour work internally (recording sounds from pd with
> ardour) despite the xruns but no sound comes out of the physical
> outputs. Playing sound through ALSA and OSS with pd works without any
> noticeable clicks.
>
> Jack's fifos are on a ramfs with 100 MB, top indicates 141 MB of free
> space and no swap used. The harddrive is formatted with an ext3
> filesystem.
>
> I compiled jack-100 and jack-0.99 with the same results.
>
> Following is the output of lsmod and mount. The jack fifos are located
> at /tmp/jack-0...
>
> Any ideas?
>
> --
> Orm
>
> snd_seq_oss            34368  0
> snd_seq_midi            8608  0
> snd_seq_midi_event      7936  2 snd_seq_oss,snd_seq_midi
> snd_seq                53648  5 snd_seq_oss,snd_seq_midi,snd_seq_midi_event
> reiserfs              248528  1
> nls_cp437               5760  0
> isofs                  37752  0
> ipv6                  262468  16
> nfsd                  201440  8
> exportfs                6528  1 nfsd
> lockd                  64520  2 nfsd
> sunrpc                152612  2 nfsd,lockd
> appletalk              36340  20
> floppy                 60304  0
> parport_pc             36932  0
> parport                41544  1 parport_pc
> analog                 11872  0
> evdev                   9600  0
> eth1394                21768  0
> pcspkr                  3688  0
> rtc                    12728  0
> ohci1394               35588  0
> ieee1394              111352  2 eth1394,ohci1394
> 8139cp                 20672  0
> snd_intel8x0           36140  0
> snd_ac97_codec         69508  1 snd_intel8x0
> snd_pcm_oss            54376  0
> snd_mixer_oss          19904  1 snd_pcm_oss
> snd_pcm                97480  2 snd_intel8x0,snd_pcm_oss
> snd_timer              25668  2 snd_seq,snd_pcm
> snd_page_alloc         11720  2 snd_intel8x0,snd_pcm
> gameport                4736  2 analog,snd_intel8x0
> snd_mpu401_uart         8000  1 snd_intel8x0
> snd_rawmidi            25316  2 snd_seq_midi,snd_mpu401_uart
> snd_seq_device          8264  3 snd_seq_oss,snd_seq_midi,snd_rawmidi
> snd                    57380  13
> snd_seq_oss,snd_seq_midi,snd_seq_midi_event,snd
> _seq,snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_time
>r,snd _mpu401_uart,snd_rawmidi,snd_seq_device
> soundcore              10400  1 snd
> shpchp                100716  0
> pciehp                 97388  0
> pci_hotplug            34352  2 shpchp,pciehp
> sis_agp                 8260  1
> agpgart                34536  1 sis_agp
> ohci_hcd               21380  0
> usbcore               118308  3 ohci_hcd
> 8139too                26112  0
> mii                     5184  2 8139cp,8139too
> capability              4616  0
> commoncap               7296  1 capability
> psmouse                20232  0
> ide_cd                 42528  0
> cdrom                  40284  1 ide_cd
> ext3                  126760  1
> jbd                    61848  1 ext3
> mbcache                 9284  1 ext3
> ide_generic             1472  0
> sis5513                16776  1
> ide_disk               19264  5
> ide_core              138724  4 ide_cd,ide_generic,sis5513,ide_disk
> unix                   28660  50
> font                    8448  0
> vesafb                  6688  0
> cfbcopyarea             3840  1 vesafb
> cfbimgblt               3072  1 vesafb
> cfbfillrect             3712  1 vesafb
> ormserv:~# mount
> /dev/hda1 on / type ext3 (rw,errors=remount-ro)
> proc on /proc type proc (rw)
> sysfs on /sys type sysfs (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw)
> /dev/shm on /tmp type tmpfs (rw,size=100m)
> usbfs on /proc/bus/usb type usbfs (rw)
> tmpfs on /dev type tmpfs (rw,size=10M,mode=0755)
> /dev/hdc1 on /mnt/hdc1 type reiserfs (rw)
> ormserv:~#
>
>
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
> Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf
> _______________________________________________
> Jackit-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/jackit-devel


-------------------------------------------------------
SF.Net email is Sponsored by the Better Software Conference & EXPO
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Re: jackd and xruns

Jack O'Quin-2
In reply to this post by Lee Revell
Lee Revell <[hidden email]> writes:

> On Mon, 2005-09-05 at 12:32 +0200, Orm Finnendahl wrote:
>> I installed a fresh Debian Sarge on an AMD Duron machine.
>
> Sarge has the NPTL bug.  This won't work.
>
> Try unstable.

or use the LD_ASSUME_KERNEL workaround...

  http://jackit.sourceforge.net/docs/faq.php#a53
--
  joq


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Re: jackd and xruns

Lee Revell
On Tue, 2005-09-06 at 07:16 -0500, Jack O'Quin wrote:

> Lee Revell <[hidden email]> writes:
>
> > On Mon, 2005-09-05 at 12:32 +0200, Orm Finnendahl wrote:
> >> I installed a fresh Debian Sarge on an AMD Duron machine.
> >
> > Sarge has the NPTL bug.  This won't work.
> >
> > Try unstable.
>
> or use the LD_ASSUME_KERNEL workaround...
>
>   http://jackit.sourceforge.net/docs/faq.php#a53

I just want to punish Debian for their incompetent boobery in letting
Sarge ship with this VERY well known bug.

Lee



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Re: jackd and xruns

Orm Finnendahl
In reply to this post by Jack O'Quin-2
Am 06. September 2005, 07:16 Uhr (-0500) schrieb Jack O'Quin:
>
> or use the LD_ASSUME_KERNEL workaround...
>
>   http://jackit.sourceforge.net/docs/faq.php#a53

I tried the workaround, but it doesn't seem to work. Can anyone see on
the console output below whether I am doing something wrong? The xruns
are occuring in very fast intervals. As mentioned before, Alsa and
Alsa-oss are working fine.

--
Orm


ormserv:~# uname -a
Linux ormserv 2.6.8-2-k7 #1 Thu May 19 18:03:29 JST 2005 i686 GNU/Linux
ormserv:~# export  LD_ASSUME_KERNEL=2.4.19
ormserv:~# echo $LD_ASSUME_KERNEL
2.4.19
ormserv:~# /usr/bin/jackd -R -d alsa -d hw:0 -r 44100 -n 2 -p 1024
jackd 0.99.54
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.
loading driver ..
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
Note: audio device hw:0 doesn't support a 32bit sample format so JACK will try a
 24bit format instead
Note: audio device hw:0 doesn't support a 24bit sample format so JACK will try a
 16bit format instead
nperiods = 2 for capture
Note: audio device hw:0 doesn't support a 32bit sample format so JACK will try a
 24bit format instead
Note: audio device hw:0 doesn't support a 24bit sample format so JACK will try a
 16bit format instead
nperiods = 2 for playback


**** alsa_pcm: xrun of at least 0.019 msecs



**** alsa_pcm: xrun of at least 0.015 msecs



**** alsa_pcm: xrun of at least 0.014 msecs



**** alsa_pcm: xrun of at least 0.014 msecs



**** alsa_pcm: xrun of at least 0.014 msecs

jack main caught signal 2
no message buffer overruns
ormserv:~#


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Re: jackd and xruns

Lee Revell
On Tue, 2005-09-06 at 16:42 +0200, Orm Finnendahl wrote:

> Am 06. September 2005, 07:16 Uhr (-0500) schrieb Jack O'Quin:
> >
> > or use the LD_ASSUME_KERNEL workaround...
> >
> >   http://jackit.sourceforge.net/docs/faq.php#a53
>
> I tried the workaround, but it doesn't seem to work. Can anyone see on
> the console output below whether I am doing something wrong? The xruns
> are occuring in very fast intervals. As mentioned before, Alsa and
> Alsa-oss are working fine.
>
> --
> Orm
>
>
> ormserv:~# uname -a
> Linux ormserv 2.6.8-2-k7 #1 Thu May 19 18:03:29 JST 2005 i686 GNU/Linux

2.6.8 is way too old, that's going to have horrible realtime
performance.  You'll get xruns when you move the mouse or stress the
disk or network.

Try 2.6.11 or (preferably) 2.6.13.  Some people allegedly have problems
with 2.6.12 but I haven't seen it.

Lee



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