[LAU] Horrible number of xruns in Jack (Emu card)

Darren Landrum darren.landrum at sbcglobal.net
Mon Jan 28 19:29:22 EST 2008

Darren Landrum wrote:
> Norval Watson wrote:
>> I got the same processor running 64-bit debian sid running jack at 44.1khz, 64 sample buffer on Audiophile 2496 soundcard with no xruns.
>> Are you running realtime kernel with realtime box checked in qjackctl/settings
>> (or with -R option on command line)?
>> (I got 4GB dual-channel RAM and 2 SATA DRIVES...)
>> My kernel: #1 SMP PREEMPT RT Wed Dec 26 08:47:49 EST 2007 x86_64 GNU/Linux
>> Norv
> Checking realtime makes no difference. Still 50-60 xruns a second at 128 
> samples, and if I go down to 64 samples, it crashes.

You know, I just noticed something. The xruns as they are reported are 
exact multiples of 53. The first is 53, then 106, then 159, etc. The 
qjackctl app looks like it updates the display once a second, so it's 
not 50-60 like my previously lazy reporting said, it's exactly 53. So... 
What's happening 53 times a second?

-- Darren

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