28 Mar
2011
28 Mar
'11
11:15 p.m.
Hi Peder. Thanks for your assistance. Info below:
What CPU do you have (grep "model name"
/proc/cpuinfo)?
AMD Phenom(tm) 9750 Quad-Core Processor
Have you made the limits.conf hack to enable realtime
and are you
I'm afraid I have no idea. I have a real-time kernel and I have it set to on
when I use firewire, but off when I use alsa. All music production (when I
get the one-off xruns) happens only when using firewire, and thus with
realtime on.
running jack in realtime (with say -P70)?
Yes I have jack in realtime, on exactly P70, but ONLY in firewire mode. Alsa
mode is set to default priority and non-realtime. I have QjackCtl setup so
that it launches and starts in Alsa-mode when I boot my computer. When I do
music stuff and turn my firewire device on I switch to the "firewire" preset
which is realtime P70.
Are you running jack with ?ber-low latency; what's
the frames/period
setting?
In firewire mode I have frames/period setting of 256 with buffer on 3 = a
latency of 17.4 msec. Alsa mode is much higher on 1024 and around 70 msec
(but I believe that should be irrelevant as I don't do any audio/midi jack
connection stuff in Alsa mode.
-Dan