On Fri, Jan 07, 2011 at 08:05:59AM -0600, Gabriel M. Beddingfield wrote: > > > 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. ahh... 512 is pretty high latency, normal PREEMPT kernels should do that pretty well. > > 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 -- torben Hohn _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
