[LAU] [Zynaddsubfx-user] zyn and the art of software maintenance

[rosea grammostola]

Gabriel M. Beddingfield wrote:
>
>
> On Thu, 17 Sep 2009, Grammostola Rosea wrote:
>>> You seem to be somewhat alone with this one. No offence, but it does
>>> sort of hint that your system setup might be less than ideal. With a
>>> little more info, some help/assistance might be possible.
>> I think my system is configured pretty well. I have no problems with any
>> other audio app.
>
> When I was tracing 'zombification' issues in Hydrogen, it was very 
> helpful to me (the developer) to know:
>
>   * jackd settings when firing up the application
>     (e.g. jackd -R -d alsa -p 4 -n 2 -r 192000 -Xseq)
>
>   * A little more about the system (memory, CPU,
>     distro, jackd version)
>
>   * Any command-line options you used to start
>     the application and cause the fault.
>
> Obviously, Zombies happen more often with aggressive JACK settings.
>
> On the other hand, even with that info it is generally hard to trace 
> out a Zombification issue.  The zombie notification happens a few 
> milliseconds _after_ the event that waited -- so, backtraces weren't 
> very helpful. Increasing your logging can corrupt your measurements 
> because I/O is one source of a zombie.  It was even possible, for 
> instance, for one application to take just a little too long (leaving 
> no time for the 2nd app).  JACK would then blame the zombification on 
> the 2nd app.
>
> I ended up having to do a static code analysis to search for memory 
> allocation, re-do our logging scheme (because its mutex was causing 
> locks), and discover some new taboo functions.  The biggest surprise 
> (for me) is that Qt's QString constructor and operator= could not be 
> used in real-time code.

/usr/bin/jackd -R -dalsa -dhw:0 -r48000 -p128 -n2 -Xseq -zt


jackd (0.116.2+svn3592-3)


Debian testing, Pentium 4 32bit


The only strange thing on my system


This is in my /etc/security/limits.conf

@audio - rtprio 99
@audio - nice -10
@audio - memlock 970215


But ulimit -l
give unlimited


I tried to figure out how come on #jack, but no solution yet

But afaik Zyn should also run properly with unlimited...


\r