[pulseaudio-discuss] no output from pulseaudio on embedded arm platform

[Jan Pohanka]

Hello,

I'm trying to clarify myself the memory requirements of pulseaudio and how  
it should be done on embedded system. Actually I have arm based board (TI  
dm365) with 128MB of RAM. I'm using the most of this memory as buffers for  
video application so only 54MB are available for the linux.
When I run pulseaudio -D (with all settings to default) the top command  
gives me following output:
   PID  PPID USER     STAT   VSZ %MEM %CPU COMMAND
   148     1 root     S <  89472 202%   0% pulseaudio -D

This is just virtual memory, from /proc/meminfo I noticed that pulseaudio  
uses ~4MB of physical RAM.
However when I try to run pulseaudio --system it fails on mmap. Does it  
use the memory in system mode differently?
What is the optimal settings for pulseaudio on a such memory limited  
system. Actually I need pulse just because ofono uses it to control the  
sound system, so there will just one or two audiostreems...

best regards
Jan

Dne Fri, 23 Mar 2012 08:22:25 +0100 Arun Raghavan  
<arun.raghavan at collabora.co.uk> napsal(a):

> On Fri, 2012-03-23 at 07:30 +0100, Jan Pohanka wrote:
>> Hello,
>>
>> thank you for the answers. I have pulseaudio working now. The last thing
>> I'm not sure about is how to handle its memory requirements.
>>
>> > PulseAudio tries to allocate 64MB per default I think, maybe too much;
>> > can
>> > be configured...
>>
>> Do you please know what is the minimal memory requirements for  
>> pulseaudio?
>> 64MB is the whole memory available on my system. I noticed that daemon
>> running for single user eats ~26MB...
>
> It should not be that high. The 64MB number is virtual memory, not
> physical. The RSS for the daemon from my observations has been in the
> 3-4MB range on a couple of ARM-based devices. That's with the default
> config though, and there are likely ways to decrease this.
>
> -- Arun
>
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