[Ardour-Users] X Runs at Exactly 10 Minute Intervals

[Martin Lynch]

Thanks Paul - I hadn't thought of that - my system has a 320GB HDD with 
all my programs (including JACK) on it and another 2 X 320GB drives in a 
RAID 0 array - is there somewhere I could find a log of journaling activity?


Paul Symons wrote:
> On Wednesday 26 September 2007 18:44:28 Martin Lynch wrote:
>   
>> Hoping someone can help me figure out what's causing X runs at precisely
>> 10 minute intervals - not 9:59, not 10:01 but exactly 10 mins.
>>
>> My setup:
>>
>> AMD 64 X2
>> Feisty
>> 2 GB DDR2 800 mhz
>> M-Audio Firewire Solo using Freebob
>> Sample rate: 96,000
>> Periods: 3
>> Frames: 64
>> Latency: 2 ms
>> Realtime checked in Qjackctl
>> Priority = 89
>> Qjackctl 0.2.21
>>
>> # ps -C jackd -cmL
>> shows:
>>
>>   PID   LWP CLS PRI TTY          TIME CMD
>> 24142     - -     - ?        00:14:40 jackd
>>     - 24142 TS   20 -        00:00:00 -
>>     - 24143 TS   24 -        00:00:00 -
>>     - 24144 TS   24 -        00:00:00 -
>>     - 24145 TS   24 -        00:00:00 -
>>     - 24146 FF  139 -        00:00:00 -
>>     - 24147 FF  129 -        00:05:51 -
>>     - 24148 FF  132 -        00:00:00 -
>>     - 24149 FF  132 -        00:00:00 -
>>     - 29990 FF  139 -        00:00:00 -
>>     - 29991 FF  133 -        00:00:25 -
>>
>> As I understand it, the FF indicates realtime.
>>
>> Messages from JACK:
>>
>> Load = 6.0202 max usecs: 44.000, spare = 622.000
>> LibFreeBoB ERR: SLAVE XMT : Buffer underrun! 64 (0 / 256) (0 / 0 )
>> 17:34:51.873 XRUN callback (2).
>> FreeBoB MSG: xrun detected
>> LibFreeBoB ERR: Xrun on connection 1
>> load = 53.0101 max usecs: 3481.000, spare = 0.000
>> load = 29.7333 max usecs: 43.000, spare = 623.000
>>
>> Load = 4.9502 max usecs: 25.000, spare = 641.000
>> LibFreeBoB ERR: MASTER RCV: Buffer overrun!
>> LibFreeBoB ERR: Xrun on connection 1
>> 17:44:51.782 XRUN callback (3).
>> FreeBoB MSG: xrun detected
>> load = 4.4270 max usecs: 26.000, spare = 640.000
>>
>> Note that in the first instance it's an underrun; 2nd instance an
>> overrun, which seems odd to me (ie I'd think with the X runs happening
>> on such a precise schedule it would show the same problem each time).
>>
>> I've tried using System Manager to track down any processes which might
>> be scheduled to run every 10 mins and can't pin down anything. I also
>> tried stopping ntpd but the problem continued.
>>
>> Other programs which run simultaneously:
>>
>> - Beryl
>> - Mythtv backend
>>
>> Using Ardour neither increases the X runs nor eliminates them - they
>> still pop up at 10 min intervals.
>>
>> Any ideas or suggestions? Could Freebob be the problem? Are there system
>> processes known to run at 10 min intervals that could be interfering?
>>
>> Also, not sure this has anything whatsoever to do with my X runs, but
>> Qjackctl also reports a whole series of:
>>
>> QTextCursor::gotoParagraph Index: 49 out of range
>> load = 4.1724 max usecs: 26.000, spare = 640.000
>> load = 4.0381 max usecs: 26.000, spare = 640.000
>> load = 3.9710 max usecs: 26.000, spare = 640.000
>> QTextCursor::gotoParagraph Index: 49 out of range
>> QTextCursor::gotoParagraph Index: 49 out of range
>>
>> I also tried running JACK from console, with the same results.
>>
>> Driving me nuts as every time I need to do a take, I have to wait until
>> an X run hits, then I have a 10 min window to record, which leaves me
>> thinking about the impending X run, rather than the part I'm playing!
>>
>> Many thanks!
>>     
>
>
> along with what Brett said, I think it can often be journalled file systems 
> committing as well. 
>
> Paul
>
>   
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