On Fri, 7 Jan 2011, torbenh wrote:
On Sun, Dec 12, 2010 at 07:22:28PM +0100, Jeremy Jongepier wrote:
On 12/12/2010 06:42 PM, Ronald Stewart wrote:
Hi,
I would go with what Robin said. That being said, Robin's tweaks on
Transmission last year on 89 set the pace for our build (brilliant!). Since
then tuning jack2 (jackdmp) Rui's rtirq, plus tuning for specific chips /
computer hardware makes a difference. If you want something now that truly
stands up and has had some of the best Linux developers touch the project,
go with Transmission 4.2. I know Paul will jump in and tune us all up with
our thoughts (go Paul!) but it should be stated again we are getting lights
out performance without RT on our new multi-touch Tablets for Pro Audio with
2.6.35, Meego/AtomN450.
So with 2.6.35 rtirq also works with a non real-time kernel?
i am not aware of normal kernels having threaded irq handlers.
additionally jack2 does not mlockall clients.
Indamixx/Transmission 4 has a PREEMPT_RT kernel and utilizes
rtirq.
Indamixx 2/Transmission 5 (MeeGo) has a PREEMPT kernel, and
therefore rtirq won't work with it. We've spent a lot of
time tuning this kernel, and while there have been no
clinical tests... we're experiencing performance very close
to Transmission 4's PREEMPT_RT kernel (With jack running at
512x2 frames/buffer and 44100 Hz) on various machines.
We are required by MeeGo to have a kernel >= 2.6.35. In
addition, to use 2.6.33 we would have to backport a
boat-load of device drivers. If an PREEMPT_RT patch appears
for 2.6.35 or 2.6.37, you can bet that we'll be all over it
and doing side-by-side comparisons.
-gabriel
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user
