[LAU] Again: JACK using too much CPU after a while

Karen Lewellen klewellen at shellworld.net
Wed Aug 24 19:25:48 UTC 2016


...and you were never in trouble!


On Wed, 24 Aug 2016, Ffanci Silvain wrote:

> Hey hey everyone,
> I've looked more into this problem and found that JACK will start by using 
> between one and two percent of the CPU, but will gradually require more. 
> After a day JACK's CPU usage stands at about 65-85%.
>
> Usage: currently only mpv (multimedia player, completely shut down after 
> every use). No persisting audio connections, no other realtime and CPU hungry 
> applications.
>
> JACK Version: 0.121.3
> Kernel Version: 3.9.0-rc6 SMP PREEMPT
> CPU scheduling/scaling_governor: powersave
> CPU setting: 800MHz single-core (of a 3GHz quadcore)
> Underlying soundcard device: ALSA multi with two MAudio Delta 1010 LT cards, 
> sync'ed via S/PDIF.
> JACK commandline:
> jackd --timeout 4500 -R -d alsa -C cdelta -P pdelta -r 48000 -p 256 -z shaped
> short-time load average: 0.47 (decreasing for longer periods).
>
> If more information or experimentation, to identify the issue, is necessary, 
> please let me know.
>
> Thank you for any help and hints in the right direction.
>
> Ta-ta,
> ----
> Ffanci
> * Homepage: https://freeshell.de/~silvain
> * Twitter:  http://twitter.com/ffanci_silvain
> * GitHub:   https://github.com/fsilvain
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> Linux-audio-user at lists.linuxaudio.org
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>
>


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