[LAU] reducing xruns (System configuration)

[Ralf Mardorf]

On Wed, 18 Jul 2018 21:15:21 +0200, Max wrote:
>On 18.07.2018 19:58, Ralf Mardorf wrote:
>> /etc/init.d/rtirq status  
>
>   PID CLS RTPRIO  NI PRI %CPU STAT COMMAND 
> 
>
>   441 FF      50   -  90  0.0 S    irq/29-mei_me 
> 
>
>   527 FF      50   -  90  0.0 S    irq/31-iwlwifi 
> 
>
>     8 TS       -   0  19  0.0 S    ksoftirqd/0 
> 
>
>    18 TS       -   0  19  0.0 S    ksoftirqd/1 
> 
>
>    24 TS       -   0  19  0.0 S    ksoftirqd/2 
> 
>
>    30 TS       -   0  19  0.0 S    ksoftirqd/3
>    36 TS       -   0  19  0.0 S    ksoftirqd/4
>    42 TS       -   0  19  0.0 S    ksoftirqd/5
>    48 TS       -   0  19  0.0 S    ksoftirqd/6
>    54 TS       -   0  19  0.0 S    ksoftirqd/7
>
>> grep RTIRQ_NAME_LIST /etc/default/rtirq  
>
># RTIRQ_NAME_LIST="rtc snd usb i8042" # old
>RTIRQ_NAME_LIST="snd usb i8042"

That's most likely the culprit or at least the major culprit. Nothing
has got rt priority.

Are you sure that you are running the lowlatency kernel? If not, than
you need the boot option 'threadirqs'.

What's the output of

uname -rm

Before you boot the lowlatency kernel or a generic kernel with
boot option 'threadirqs', make USB the head and remove the keyboard from
this list, IOW change it to RTIRQ_NAME_LIST="usb snd".