[mythtv-users] AudioOutputBase thread goes to 100% CPU after playing for a while

[Jean-Yves Avenard]

On 24 August 2013 23:33, Thomas Börkel <thomas at boerkel.de> wrote:
> HI!
>
> Now I disabled real time threads (read somewhere that this could cause
> problems), but it did not help.
>
> But I think the audio buffer of the sound card matters.
>
> I am outputting the audio over ALSA to 2 sound cards:
> #1 onboard Intel audio
> #2 Nvidia audio over HDMI
>
> Card #1 already had 320 buffers through my startup script. Card #2 only
> had 56 buffers.
>
> I was able to raise card #2 to 256, but not to 320 (audio did not work
> anymore with 320).
>
> So, I have now set both to 256. The CPU usage of mythfrontend still
> rises while playing, but not so fast anymore. 30% CPU after 45 minutes
> of playing.
>
> So the audio buffer size seems to be related with the problem.
>
> BTW, when a show finishes and the audio streams change, CPU usage is
> being "resetted" back to 0%.
>
> Anything else I can do or try?


That it takes so much system time, indicates an issue at the hardware
level; otherwise you would have a very high user % and low system %...

How do you use htop? not sure how you retrieved the information (i
didn't even know about htop until I read your message)