[LAD] [LAU] jackdbus eating 100% cpu after a while

Florian Paul Schmidt mista.tapas at gmx.net
Sat Feb 9 12:24:22 UTC 2013

Hi James,

On 02/09/2013 01:11 PM, James Stone wrote:
> Hi Flo, I am also running Ubuntu 12.10 and using jackdbus. It is 
> really nice for things like playing along to youtube videos.. On my 
> computer, I noticed that jack does have a tendency to lockup after a 
> while when jackdbus is running. I had the feeling that it might be 
> something to do with latency, as I found it is impossible to start 
> jack at very low latencies with jackdbus running. I was using 128 
> samples which seemed to be OK, but at that latency, the lockups 
> occurred after some time. I tried increasing latency to 256 
> samples/44.1k. Following this, it seems to operate fine (at least I 
> have had no more dropouts), but it is all a bit fiddly to get it to 
> work properly, and I would probably disable pulse if I wanted to do 
> serious recording etc without the mixing capabilities that jackdbus 
> adds.. James 

I use very large period sizes, 1024 or even 2048. The problem of jackd 
starting to eat 100% cpu occurs usually when I'm done with my current 
work (recording something or fiddling around) and just leave it running 
idly. Then when I return to my computer after a few hours jackd sits 
there happily eating cpu. It has the side effect of heating my room, but 
heating with electricity is expensive and thus I'd rather avoid it ;D

Have fun,

Florian Paul Schmidt

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