Bug 81288 - High cpu useage when running Skype
Summary: High cpu useage when running Skype
Alias: None
Product: PulseAudio
Classification: Unclassified
Component: core (show other bugs)
Version: unspecified
Hardware: x86 (IA32) Linux (All)
: medium normal
Assignee: pulseaudio-bugs
QA Contact: pulseaudio-bugs
Depends on:
Reported: 2014-07-13 10:57 UTC by Clemens Eisserer
Modified: 2018-07-30 10:00 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

sysprof screenshot of system-wide profile run (160.03 KB, text/plain)
2014-07-13 10:57 UTC, Clemens Eisserer
screenshot of system-wide sysprof profile run (160.03 KB, image/png)
2014-07-13 10:59 UTC, Clemens Eisserer

Description Clemens Eisserer 2014-07-13 10:57:51 UTC
Created attachment 102690 [details]
sysprof screenshot of system-wide profile run

Running skype on my mother's old Pentium-4 based laptop, I noticed pulseaudio consumes a fairly high share of CPU ressources.

As can be seen in the attached sysprof-screenshot, pulseaudio consumes almost half the cycles skype does. However this was a video-call - so skype was not only de- and encoding audio, but also video. Furthermore, pulseaudio consumed almost 3 times the CPU cycles of Xorg required to push the video pixels to the display.

- Pentium 4, 2.6ghz
- Fedora 20 + latest updates
- pulseaudio-4.0-13.gitf81e3.fc20.i686

I've seen similar behaviour on my modern (sandy bridge core-i7) x86_64 laptop, where pulseaudio consumes as much CPU cycles just playing sound as mplayer needs to decode and display/output video and audio.
Comment 1 Clemens Eisserer 2014-07-13 10:59:09 UTC
Created attachment 102691 [details]
screenshot of system-wide sysprof profile run
Comment 2 GitLab Migration User 2018-07-30 10:00:57 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/167.

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