Is it normal for pulseaudio to have 20% CPU load? [not relevant]

asked 2014-02-13 15:08:30 +0200

umko gravatar image

updated 2015-03-10 18:42:23 +0200

While I am quite happy with the Jolla battery standby time, I have noticed that if I am listening to music or podcasts, my battery is draining quite much faster than when I am just using apps.

Looking at the "top" output, it shows that pulsaudio has an average load of around 20% on the CPU while music is playing.

Is this normal and are there any possibilities for optimization?

UPDATE March 2015: At some point of time (probably with one of the updates) the problem disappeared.

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The question has been closed for the following reason "question is not relevant or outdated" by umko
close date 2015-09-20 01:24:03.894105


Could you be more specific as to where you are getting this data from? Are you are using Crest from Warehouse Repo's to see the CPU usage?

Edz ( 2014-02-13 17:22:27 +0200 )edit

just top in the fingerterm, while music is playing. pulsaudio is always at the top with 17%-20% CPU load.

umko ( 2014-02-13 17:25:17 +0200 )edit

I have 1-4 % load while playing. What kind of files are you playing? Can you provide a sample?

STiAT ( 2014-02-13 21:21:14 +0200 )edit

Well, it does not seem to be dependent on the file itself. Take any standard TWiT Mp3 episode. It is the same when I listen through AntennaPod (Android Podcatcher) or the native Media player (17-20% for pulseaudio + a few percentage points for the application itself).

umko ( 2014-02-13 22:10:46 +0200 )edit

@umko - What is the sampling rate of your MP3 file? If it is not the native frequency, pulse will have to use a sample rate conversion algorithm, which depending on configuration, may be expensive. If it uses the common speex3 setting, I guess 20% would be normal.

I have read more recent pulseaudio libraries are a bit better in this respect.

mikelima ( 2014-03-14 12:57:52 +0200 )edit