Re: [LAD] 2.6.20 scheduler and buffer underruns

On 7/12/07, Darren Gibbs <tsquank@email-addr-hidden> wrote:
> So the story is more interesting now... with SCHED_FIFO I'm seeing
> occational delays of about 60 sample frames (@44K) when there is very
> little other CPU activity. It still looks like a buffer underrun in
> that the audio data is contiguous on both sides of the delay, so I'm
> not dropping a buffer. When I load the CPU with another task doing a
> while(1) loop, the glitches go away. Hmmm....
>

You will probably need to run an -rt patched kernel to get acceptable
performance from JACK. This also includes a cool latency tracing
feature that will tell you what IRQ handler is using too much CPU
time.

Lee
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Received on Fri Jul 13 00:15:01 2007