Audacious creates 133 wakeups while being idle

[Peter Hüwe]

On Tuesday 23 October 2007 00:13:22 Alan Jenkins wrote:
> Peter Hüwe wrote:
> > Hi,
> >
> > I noticed that audacious (music player) creates 133 wakeups while being
> > in idle mode (i.e. playback stopped)
> > ->This is quite a huge amount
> >
> > Any suggestions how to reduce that amount?
> > I tried disabling the scrolling song name feature, but that reduced the
> > wakeups only by three.
>
> If theres an option to increase buffer sizes that might help.
>
> I think just keeping an audio device open causes wake-ups on some
> drivers, even if you're not writing to it.  But it's also possible your
> player is writing (silence) to the device.
>
> What are the wakeups like when playing?  Much more?  Less?  The same?
>
> It seems to be a common feature of music players, though 133 is
> excessive.  Amarok does 50/s all the time, idle or playing.  My guess is
> these wakeups are probably something most music players do at a low
> level, and that it's probably more natural to keep the wakeups going on
> idle (i.e. it made the code look better and there didn't seem to be any
> reason not to do it at the time).  IOW I'd look at the audio output
> path, not the GUI.


When Playing the value jumps up to 200 on schedule_timeout and a new item 
shows up with 70 wake ups (do_nanosleep)  [+ 50 from the soundcard driver]

stracing it shows this:
http://nopaste.biz/20545

ls -l /proc/`pgrep audacious`/fd|awk '{print $1 " " $9 " " $10 " " $11}' 

lrwx------ 0 -> /dev/pts/2
lrwx------ 1 -> /dev/pts/2
lrwx------ 2 -> /dev/pts/2
lrwx------ 3 -> socket:[73223]
lr-x------ 4 -> pipe:[73225]
l-wx------ 5 -> pipe:[13222]
l-wx------ 6 -> pipe:[73225]
lr-x------ 7 -> pipe:[13239]
l-wx------ 8 -> /home/peter/.config/audacious/log
lrwx------ 9 -> socket:[73231]

grepping the numbers out of netstat shows en empty result



Starting audacious headless (i.e. without a GUI) it still creates 100 wakeups


Regards.
Peter