[LAU] xruns with m-audio fast track pro on fedora 8 ccrma

[Fernando Lopez-Lezcano]

On Tue, 2008-01-22 at 19:36 +0100, Florent Berthaut wrote:
> Fernando Lopez-Lezcano a écrit : 
> > On Tue, 2008-01-22 at 13:29 +0100, hitmuri at no-log.org wrote:
> >   
> > > Thanks for answering (maybe i could have asked on the linuxmao.org forum
> > > too ;) ) .
> > > 
> > > I tried to change the rtirq script but it doesn't seem to make any
> > > difference. But while looking at the rt priorities, i noticed that the
> > > highest priority for usb was given to the irq 16 and cat /proc/interrupts
> > > tells me that on irq 16 there's uhci_hcd:usb3 and NVIDIA !!!
> > > When i plug my usb soundcard , it's always on irq 20.
> > > So it looks like the highest priority is given to the graphics card .
> > >     
> > 
> > Because it shares the interrupt with the usb controller which may have
> > an audio card attached...
> > 
> > What do you see in "cat /proc/interrupts" for other interrupts? Do you
> > perhaps have another usb controller that does not share an interrupt
> > with the graphics controller?
> > 
> >   
> cat /proc/interrupts gives me this : 
>            CPU0       CPU1       
>   0:      89731      89923   IO-APIC-edge      timer
>   1:        151        113   IO-APIC-edge      i8042
>   8:          0          0   IO-APIC-edge      rtc0
>   9:         12         11   IO-APIC-fasteoi   acpi
>  12:      42277      41891   IO-APIC-edge      i8042
>  14:       7056       7085   IO-APIC-edge      libata
>  15:       1376       2002   IO-APIC-edge      libata
>  16:      11532      11641   IO-APIC-fasteoi   uhci_hcd:usb3, nvidia
>  18:          0          0   IO-APIC-fasteoi   yenta
>  19:      18782      18903   IO-APIC-fasteoi   ehci_hcd:usb1,
> uhci_hcd:usb7
>  20:       8615       8284   IO-APIC-fasteoi   ehci_hcd:usb2,
> uhci_hcd:usb5
>  21:          1          2   IO-APIC-fasteoi   uhci_hcd:usb4, ohci1394
>  22:          0          0   IO-APIC-fasteoi   uhci_hcd:usb6
>  23:          0          0   IO-APIC-fasteoi   sdhci:slot0
> 220:      18041      18081   PCI-MSI-edge      eth0
> NMI:          0          0 
> LOC:      92078      94169 
> ERR:          0
> MIS:          0
> 
> 
> Actually the usb controller on which my soundcard is (IRQ 20) isn"t
> shared with the graphics controller.
> So i tried to set the priorities of the other irq so that the usb
> controller with my soundcard gets the highest priority
> 
> I get this with /etc/init.d/rtirq status : 
>  1047 FF      95   - 135  0.0 S<   IRQ-8        rtc0
>   417 FF      88   - 128  0.6 S<   IRQ-20       ehci_hcd:usb2,
> uhci_hcd:usb5
>   425 FF      87   - 127  0.0 S<   IRQ-21       uhci_hcd:usb4,
> ohci1394
>   426 FF      86   - 126  0.0 S<   IRQ-22       uhci_hcd:usb6
>     5 FF      50   -  90  0.0 S<   softirq-high/0
>     6 FF      50   -  90  0.1 S<   softirq-timer/0
>     7 FF      50   -  90  0.0 S<   softirq-net-tx/
>     8 FF      50   -  90  0.0 S<   softirq-net-rx/
>     9 FF      50   -  90  0.0 S<   softirq-block/0
>    10 FF      50   -  90  0.3 S<   softirq-tasklet
>    11 FF      50   -  90  0.0 S<   softirq-sched/0
>    12 FF      50   -  90  0.0 S<   softirq-hrtimer
>    13 FF      50   -  90  0.0 S<   softirq-rcu/0
>    18 FF      50   -  90  0.0 S<   softirq-high/1
>    19 FF      50   -  90  0.0 S<   softirq-timer/1
>    20 FF      50   -  90  0.0 S<   softirq-net-tx/
>    21 FF      50   -  90  0.0 S<   softirq-net-rx/
>    22 FF      50   -  90  0.0 S<   softirq-block/1
>    23 FF      50   -  90  0.0 S<   softirq-tasklet
>    24 FF      50   -  90  0.0 S<   softirq-sched/1
>    25 FF      50   -  90  0.0 S<   softirq-hrtimer
>    26 FF      50   -  90  0.0 S<   softirq-rcu/1
>    78 FF      50   -  90  0.0 S<   IRQ-9        acpi
>   388 FF      50   -  90  0.0 S<   IRQ-18       yenta
>   394 FF      50   -  90  0.1 S<   IRQ-12       i8042
>   395 FF      50   -  90  0.0 S<   IRQ-1        i8042
>   454 FF      50   -  90  0.1 S<   IRQ-14       libata
>   455 FF      50   -  90  0.0 S<   IRQ-15       libata
>  1032 FF      50   -  90  0.3 S<   IRQ-220      PCI-MSI-edge      eth0
>  1093 FF      50   -  90  0.0 S<   IRQ-23       sdhci:slot0
>   416 FF      35   -  75  0.1 S<   IRQ-19       ehci_hcd:usb1,
> uhci_hcd:usb7
>   424 FF      35   -  75  0.3 S<   IRQ-16       uhci_hcd:usb3, nvidia
> 
> But it doesn't make any changes, still xruns.

A more basic question... what parameters are you using when you start
jackd?

-- Fernando