[LAU] Raspberry Pi2 crashes with jconvolver/jack/squeezelite/Squeezebox server

[Simon Wise]

On 27/02/16 04:25, Jean Beauve wrote:
> Hello Jeremy,
>
> Most of the time, RPi2 send a continuous beep sound from the I2S DAC output
> and is not anymore under control from putty, so, Yes it is RPi2 that
> crashes.
>
> Once upon a time, i have xruns errors although jackd is in softmode and
> this whatever the buffer size.

not sure about the current status, I have only old single core RPIs here and 
have not played with them for a while in any case, but some time ago an issue 
with the RPI2 was that load balancing between the cores meant that the caches 
got invalidated as processes got switched between cores leading to x-runs each 
switch ... a way to deal with that was to use the kernel systems for locking the 
critical dsp threads to particular cores.


Simon

>
> I didn't experience problems when the RPi2 was running only
> Jackd/jconvolver/Squeezelite (non RT).
> I had the problem when running also squeezebox server (RT).
>
> I had similar problems (buffer issues) with RPi2 was running
> BruteFIR/Squeezelite/Squeezebox server, both RT and non RT.