[LAU] rtirq questions

Max abonnements at revolwear.com
Mon Mar 9 12:10:31 CET 2020


On 09.03.20 00:19, Chris Caudle wrote:
> On Sun, March 8, 2020 6:53 am, Roger wrote:
>> On 8/3/20 8:55 pm, Max wrote:
>>> Is there a way to verify if the kernel was loaded with the threadirqs
>>> option, so this test could be added to realtimeconfigquickscan?
>>
>> Interesting question and it came up using a quick search of you question
>> in the first few results, in the Mixxx wiki -
>> https://www.mixxx.org/wiki/doku.php/adjusting_audio_latency
>>
>> grep threadirqs /proc/cmdline
> 
> With the caveat that you will also need to check whether the kernel is
> running the full RT patch, in which case IRQ handling is always threaded,
> so the threadirqs command line option is not needed.  Also note that even
> with the threadirqs command line, I do not think threaded IRQ handling is
> implemented if the PREEMPT option is not selected when the kernel is
> compiled.  That was the case in the past, I have not verified it is still
> the case with the very latest, although if you are looking for low latency
> you will probably want to verify that the kernel is configured with at
> least PREEMPT if not using the full PREEMPT-RT patches.
> 

I had the feeling this is quite complex to put into a script that checks 
for all these cases and gives a recommendation.

https://github.com/raboof/realtimeconfigquickscan/issues/31

If you know how to query for those different options please share.


More information about the Linux-audio-user mailing list