[pulseaudio-discuss] High CPU Usage in System Mode

[Georg Chini]

On 25.06.20 21:32, jtharkey wrote:
> Hello,
>
> We have an embedded device that we're switching from straight ALSA 
> over to PulseAudio. There are no users on the system other than root 
> so we have pulse running in system mode. It works, but has unusually 
> high CPU usage. The device has a 2.6GHz Dual Core CPU. At idle, pulse 
> is using about 15-20% of the CPU. Every now and then it spikes up to 
> 80-90% CPU usage. However, on our dev machines running on the same 
> hardware and under XFCE with pulse in user mode, this doesn't happen. 
> The idle usage is less than 1% and it can get up to 3-5% max.
>
> This makes me think pulse is setup differently on our dev machines, 
> but looking at the configuration files that doesn't seem to be the 
> case. Could this have something to do with running in system mode? If 
> so, how do I fix it?
>
> Thanks,
> JT
>
Which PA version are you using? What does "idle" mean exactly? All sinks 
and sources suspended?
Can you check with "pactl list sinks" and "pactl list sources" if really 
everything is suspended?
If "idle" only means no sound (but sinks/sources still in RUNNING or 
IDLE state), can you compare
the latency in system and user mode?
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