Re: Issue with the priority of the sound cards using rtirq

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



The config of the Ubuntu Studio Precise kernel 3.2.0-23-lowlatency, seems to be ready to use it with threadirqs as boot option.
Anyway, I still get
$ /etc/init.d/rtirq status

  PID CLS RTPRIO  NI PRI %CPU STAT COMMAND
   92 FF      90   - 130  0.0 S    irq/8-rtc0
   85 FF      85   - 125  0.0 S    irq/18-ohci_hcd
   89 FF      84   - 124  0.0 S    irq/18-ohci_hcd
  611 FF      83   - 123  0.0 S    irq/18-snd_hdsp
1285 FF      82   - 122  0.8 S    irq/18-nvidia
  652 FF      80   - 120  0.0 S    irq/20-snd_ice1
  656 FF      80   - 120  0.0 S    irq/21-snd_ice1

instead the of the wanted

$ /etc/init.d/rtirq status

  PID CLS RTPRIO  NI PRI %CPU STAT COMMAND
  384 FF      90   - 130  0.0 S    irq/8-rtc0
1102 FF      85   - 125  0.0 S    irq/18-hdspm
1123 FF      80   - 120  0.0 S    irq/20-ICE1712
1135 FF      80   - 120  0.0 S    irq/21-ICE1712

So for the moment I guess it's better instead of using
$ grep RTIRQ_NAME_LIST /etc/default/rtirq
RTIRQ_NAME_LIST="rtc hdspm snd usb i8042"
which does the trick for other installs, to use
$ grep RTIRQ_NAME_LIST /etc/default/rtirq
RTIRQ_NAME_LIST="rtc snd usb i8042"
since this results in
$ /etc/init.d/rtirq status

  PID CLS RTPRIO  NI PRI %CPU STAT COMMAND
   92 FF      90   - 130  0.0 S    irq/8-rtc0
  702 FF      85   - 125  0.0 S    irq/20-snd_ice1
  724 FF      85   - 125  0.0 S    irq/21-snd_ice1
  717 FF      83   - 123  0.0 S    irq/18-snd_hdsp
1348 FF      82   - 122  0.8 S    irq/18-nvidia
   78 FF      80   - 120  0.0 S    irq/19-ehci_hcd
   80 FF      80   - 120  0.3 S    irq/16-ohci_hcd
   82 FF      79   - 119  0.0 S    irq/17-ohci_hcd
   84 FF      78   - 118  0.0 S    irq/18-ohci_hcd
   87 FF      78   - 118  0.0 S    irq/17-ohci_hcd
   89 FF      77   - 117  0.0 S    irq/18-ohci_hcd
   91 FF      75   - 115  0.0 S    irq/1-i8042
   20 FF      50   -  90  0.0 S    irq/9-acpi
   67 FF      50   -  90  0.2 S    irq/22-ahci
  279 FF      50   -  90  0.0 S    irq/14-pata_ati
  280 FF      50   -  90  0.0 S    irq/15-pata_ati
  292 FF      50   -  90  0.0 S    irq/22-firewire
  561 FF      50   -  90  0.0 S    irq/7-parport0
1020 FF      50   -  90  0.0 S    irq/43-eth0
    3 TS       -   0  19  0.2 S    ksoftirqd/0
    9 TS       -   0  19  0.2 S    ksoftirqd/1
so my MIDI interfaces snd_ice1... get a higher priority than the audio card snd_hdsp..., but at least all the other stuff get a lower priority.

On other installs I also got/get the wanted priority for a non-rt, with threadirqs, e.g.:
spinymouse@avlinux:~$ uname -a
Linux avlinux 3.0.23-avl-7-pae #28 SMP PREEMPT Thu Mar 1 19:14:14 EST 2012 i686 GNU/Linux
spinymouse@avlinux:~$ /etc/init.d/rtirq status

  PID CLS RTPRIO  NI PRI %CPU STAT COMMAND
  452 FF      90   - 130  0.0 S    irq/8-rtc0
1028 FF      85   - 125  0.0 S    irq/18-hdspm
1040 FF      80   - 120  0.0 S    irq/20-ICE1712
1042 FF      80   - 120  0.0 S    irq/21-ICE1712
  615 FF      75   - 115  0.0 S    irq/19-ehci_hcd
  620 FF      75   - 115  0.2 S    irq/16-ohci_hcd
  622 FF      74   - 114  0.0 S    irq/17-ohci_hcd
  626 FF      73   - 113  0.0 S    irq/17-ohci_hcd
  445 FF      70   - 110  0.0 S    irq/1-i8042
   96 FF      50   -  90  0.0 S    irq/9-acpi
  621 FF      50   -  90  0.1 S    irq/22-firewire
  625 FF      50   -  90  0.0 S    irq/18-ohci_hcd
  627 FF      50   -  90  0.0 S    irq/18-ohci_hcd
  628 FF      50   -  90  0.0 S    irq/14-pata_ati
  629 FF      50   -  90  0.0 S    irq/15-pata_ati
  634 FF      50   -  90  0.3 S    irq/22-ahci
  909 FF      50   -  90  0.0 S    irq/7-parport0
1414 FF      50   -  90  0.0 S    irq/43-eth0
    3 TS       -   0  19  0.0 S    ksoftirqd/0
    9 TS       -   0  19  0.0 S    ksoftirqd/1

Could it be the kernel version or video driver?

Any hints are welcome,
Ralf

PS: I did not test if it really does matter if the audio card has a higher or lower priority than the MIDI cards.
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user

[ALSA Users]     [ALSA Devel]     [Linux Media]     [Kernel]     [Online Dating]     [Photo Sharing]     [Gimp]     [Yosemite News]     [Video 4 Linux]

Add to Google Powered by Linux