On Tue, Jul 2, 2013 at 5:53 PM, Fero Kiraly <fero.kiraly@email-addr-hidden> wrote:
> I have some troubles - read xruns - with this setup:
There's a lot more to removing Xruns from a system than just the kernel and
JACK settings (although they are very important :)
Known things that need to be done:
-Interrupt requests of your hardware must be prioritized (rtirq script
helps here)
-Interrupt thread handlers (on RT kernel) must be prioritized
-Thread priorities must be checked for JACK itself
Some other things to look into are:
-CPU scaling (causes Xruns here, although others say it works fine)
-WiFi (must be disabled here: "iwconfig wlan0 txpower off", not just
disconnected)
-Graphics chip drivers (I'm using a standard xf86-video driver for my ATI
HD2400XT)
That's a good start anyway: If I find some time, I'll write a quick post on
tuning an Arch system for maximum low-lat RT performance.
> My aim is to get as low latency as possible.
Please specify... How low is low :D I've achieved 0.3ms at 96kHz, running a
CPU stress test on each core without Xruns, so I'm pretty happy with
that... since the hardware (Echo Indigo DJ PCMCIA) can't handle any lower!
> but none of them was without xruns when running:
> pd - plugins - ardour
PD is a bit of a xrun hog on my machine here: not bashing PD, I probably
don't have it set up with ideally. But perhaps try running eg Ardour on its
own for testing purposes? Or another simple app which isn't as dependent on
the "patch" that's loaded..?
HTH, -Harry
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Received on Tue Jul 2 20:15:03 2013
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