[LAU] kernel changes -was - So what do you think sucks about Linux audio ?

[Charles Z Henry]

On Sun, Feb 10, 2013 at 12:25 PM, Harry van Haaren <harryhaaren at gmail.com>wrote:

> On Sun, Feb 10, 2013 at 5:34 PM, Louis Gorenfeld <
> louis.gorenfeld at gmail.com> wrote:
>
>> devices don't perform as well on the 3.x series kernels compared to my
>> old trusty 2.6.33,
>>
>
> I used to be of the same opinion. Currently running a 3.6.11-rt kernel,
> and getting very low latencies from it, on a modest 5 year old laptop.
> We're talking 0.666 ms, while compiling a kernel, 0 xruns.
>
>
Yeah, but you're a ninja :)
I've been wanting to upgrade my kernel, but I'm a bit skeered of doing so
right now.  I started working on my current project (PdCUDA) a few years
ago and am a few driver and kernel versions behind.  I couldn't get rt
kernels to work with the nvidia proprietary driver (which is necessary for
me).  Now, I understand that's been resolved in recent versions, but I'm
leery of making any big jumps in the kernel tree.  Sounds dumb... but I'll
just wait for debian wheezy, which I presume will be a stable platform for
the next 2 years and update my system and try to tune for rt then.


> Notes:
> -logged in as root (yes yes, i know)
> -rtirq running on startup to fix interrupts
> -wifi is a killer, turn it off (Thanks to Jeremy's LAC workshop on RT-ing
> a system, I didn't know about it till then)
> -cpu-scaling can cause xruns, cpupower frequency-set -g performance to run
> all cores at 100% all the time.
> -i kicked out bluetooth to be sure
> -as few daemons as possible
> -there is no proprietary driver for the Ati HD2400XT integrated for the
> 3.x series kernel. Hence "normal" graphics, no 3d acceleration
>
> Details:
> Acer travelmate laptop: Intel Core2Duo 2.0 Ghz
> Arch linux based system: Linux audio 3.6.11-rt25-1-rt #1 SMP PREEMPT RT
> Tue Dec 25 00:18:17 CET 2012 x86_64 GNU/Linux
> Soundcards: RME Multiface II, running trough PCMCIA adapter. Also have an
> Echo Indigo DJ card, PCMCIA too.
>
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