[LAU] reducing xruns (System configuration)

Max abonnements at revolwear.com
Thu Jul 19 14:20:29 CEST 2018


On 18.07.2018 22:38, Ralf Mardorf wrote:
> 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

4.17.8-041708-lowlatency x86_64

> 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"
could you elaborate how?


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