Re: [Jamin] ardour export + jamin

[Kees v. V. <kee...@gm...>]

Jack,

Can't get it to abort when the Jack period is 256. Tried it several 
times without aborting. My .jackdrc then was: /usr/bin/jackd -R -dalsa 
-dhw:0 -r44100 -p256 -n2

As soon as I changed my jack settings to 64 frames: /usr/bin/jackd -R 
-dalsa -dhw:0 -r44100 -p64 -n4, Jamin aborted at the end of the first 
export I tried.

I've attached the gdb.log with the content you asked. Kernel: Linux 
2.6.31-9-rt #152-Ubuntu SMP PREEMPT RT Thu Oct 15 05:01:14 UTC 2009 i686 
GNU/Linux. All packages from the Ubuntu Karmic standard repos.

Changing the jack settings to 128 frames: /usr/bin/jackd -R -dalsa 
-dhw:0 -r44100 -p128 -n2, did not show the abort either, tried it 
several times in a row.

As soon as I changed it back to 64 as above, trouble started again.

I'm very curious about the magical 256/128 ...

If you need more info, or want me to try other things, let me know.

Regards,
Kees

-------- Original Message --------
Subject: Re: [Jamin] ardour export + jamin
From: Jack O'Quin <jac...@gm...>
To: Kees van Veen <kee...@gm...>
Date: Wed Jan 13 2010 17:53:55 GMT+0100 (CET)
> On Wed, Jan 13, 2010 at 10:32 AM, Jack O'Quin <jac...@gm...> wrote:
>   
>> On Wed, Jan 13, 2010 at 2:40 AM, Kees van Veen <kee...@gm...> wrote:
>>     
>
>   
>> If you can reproduce this error, please configure your system to take
>> a core dump (ulimit -c unlimited), trigger the failure, then print the
>> gdb stack traceback for all the jamin threads:
>>
>> gdb> thread all apply bt
>>
>> Then, please send the output to this list, along with your JACK
>> parameters (period, etc) and any other interesting facts you can think
>> of.
>>     
>
> Kees,
>
> I just read the long thread about this from the Ardour site.  The
> process thread aborts exactly where I expected from your description.
> But, I'd still like to know where the other threads were at that time.
>
> Is your JACK period less than 256 frames?  What happens if you use a
> larger frame size (at least 256)?  Does the problem go away then?
>
> Depending on what we discover, I may ask you to try some different patches.
>
> Regards,
>