[pulseaudio-tickets] [PulseAudio] #114: Reduce the wakeups for the audio hardware (powertop profiling)

[PulseAudio]

#114: Reduce the wakeups for the audio hardware (powertop profiling)
-------------------------+--------------------------------------------------
 Reporter:  coling       |       Owner:  lennart
     Type:  enhancement  |      Status:  new    
 Priority:  normal       |   Milestone:         
Component:  daemon       |    Severity:  normal 
 Keywords:               |  
-------------------------+--------------------------------------------------
 While incidentally discussing pulseaudio with someone (Amaranth) on IRC on
 #compiz-fusion-dev he mentioned the killing effect on battery life with
 pulseaudio.

 Using the tool "powertop" I profiled pulseaudio.

 The largest culprit seems to be the sound device:
 {{{
   33.5% (250.4)       <interrupt> : uhci_hcd:usb2, HDA Intel
 }}}

 Killing pulseaudio and those 250 wakeups disappear off the register!

 Amaranth reckons it would be hard to get it below 48/second due to 48KHz
 audio but still 250 seems pretty high.

 Is there anything that can be done?

 Col

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Ticket URL: <http://www.pulseaudio.org/ticket/114>
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