[pulseaudio-tickets] [Bug 84585] Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84585

--- Comment #98 from Alessandro Ferri <alessandroferri_015 at fastwebnet.it> ---
(In reply to Raymond from comment #96)
> https://wiki.debian.org/PulseAudio
> 
> you need to remove the leading semicolon if you want to change any parameter

Hi Raymond
these are the results obtained by setting the parameter, without the leading
semicolon on /etc/pulse/daemon.conf: 

default-fragment-size-msec = 80 

As can be seen there is an improvement albeit minimal, but not sufficient. In
Kernel 3.12.25+ pulseaudio used at most 13% of the CPU.

pi at raspberrypi ~ $ top
top - 09:42:23 up 2 min,  2 users,  load average: 1.36, 0.63, 0.24
Tasks:  92 total,   1 running,  91 sleeping,   0 stopped,   0 zombie
%Cpu(s): 39.6 us, 26.8 sy,  0.0 ni, 29.4 id,  0.0 wa,  0.0 hi,  4.2 si,  0.0 st
KiB Mem:    447856 total,   137048 used,   310808 free,    14876 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    67500 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND           
 2337 pulse      9 -11 87984 5132 3532 S  49.8  1.1   0:26.73 pulseaudio        
 2416 pi        20   0  115m 3928 2532 S  15.9  0.9   0:08.62 shairport         
 2524 root      20   0 22264  10m 4660 S   1.3  2.5   0:03.13 Xorg              
 2739 pi        20   0  4672 1380 1036 R   1.3  0.3   0:01.12 top               
 2728 pi        20   0  113m 9932 7696 S   0.6  2.2   0:01.52 lxterminal

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