24 Jul
2014
24 Jul
'14
9:31 p.m.
On 07/24/2014 09:16 PM, Russell Hanaghan wrote:
No not really. With a lowlatency kernel I can barely run my audio
interface at 8 / 3 @ 48kHz which works in a bit more stable way with a
RT kernel. I typically run at 64 / 3 and then xruns pop up faster with a
lowlatency kernel compared to a RT kernel.
You write:
"But in testing with Enlightenment, also killing all unnecessary
processes, it really appears to make very little difference to how
firewire interface performs.
Running Mixbus 2.5, 8 mono trx, 5 Harrison plugins (EQ, master EQ, etc).
Older laptop... Sony Vaio dual core 1.6ghz, 2g, firewire Maudio solo.
Disabled ACPI stuff, wireless and so forth. 256 / 3 is barely stable
with plugins not running w/ record."
So you're using FireWire, in that case the FireWire host controller
chipset is key, maybe you could post the output of ffado-diag. Also
getting the IRQ prios right can make a huge difference when using FireWire.
Jeremy
On Jul 24, 2014, at 12:06 PM, Jeremy Jongepier
<jeremy(a)autostatic.com> wrote:
Thnks Jeremy,
Anything specific of notable effect?
On 07/24/2014 08:18 PM, Russell Hanaghan wrote:
Hey,
Is anyone achieving significant audio latency gains or xrun stability using a RT kernel
with Kxstudio or similar Ubuntu studio distro's?
If so, which kernel / where /do I gotta roll my own?
Thanks!
~ Russell
Hi Rusell,
I'm using stripped down Ubuntu installs with 3.2 and 3.8 RT kernels
which I roll myself. RT kernels allow me to achieve slightly lower
latencies and a bit more stable systems. But I don't think this is all
due to the RT kernels, it's also doing the right tweaks with the right
tools.
Jeremy
I've read up on most of it I think. Top items;
Shut wireless networking off.
Dedicated irq to audio device.
Kill or disable power saving stuff
Minimize background proc intensive processes.
Realtimescan app reports all is well bar no RT kernel. Typical recording is at 44.1/16.
Thnx
R