15 Jul
2007
15 Jul
'07
8:13 a.m.
On Thursday 12 July 2007 20:23:02 Lee Revell wrote:
On 7/12/07, Darren Gibbs <tsquank(a)yahoo.com>
wrote:
Joining in on this discussion. What feature is this, and how does one use it?
I need to diagnose my system for the source of constant XRUNs.
Juuso
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.