linuxaudio.org

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On Sun, Feb 10, 2013 at 12:25 PM, Harry van Haaren wrote:
> On Sun, Feb 10, 2013 at 5:34 PM, Louis Gorenfeld <

quoted text
> louis.gorenfeld@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:

quoted text
> -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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Content-Transfer-Encoding: quoted-printable
On Sun, Feb 10, 2013 at 12:25 PM, Harry van Haaren <harryhaare=

n@gmail.com> wrote:

On Sun, Feb 10, 2013 at 5:34 PM, Louis Gorenfeld <louis.gorenfeld=

@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 latenci=

es 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 sk=

eered of doing so right now.=A0 I started working on my current project (Pd=

CUDA) a few years ago and am a few driver and kernel versions behind.=A0 I =

couldn't get rt kernels to work with the nvidia proprietary driver (whi=

ch is necessary for me).=A0 Now, I understand that's been resolved in r=

ecent versions, but I'm leery of making any big jumps in the kernel tre=

e.=A0 Sounds dumb... but I'll just wait for debian wheezy, which I pres=

ume will be a stable platform for the next 2 years and update my system and=

 try to tune for rt then.

=A0Notes:-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-i=

ng 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-a=

s few daemons as possible-there is no proprietary driver for the Ati HD=

2400XT integrated for the 3.x series kernel. Hence "normal" graph=

ics, no 3d acceleration
Details:Acer travelmate laptop: Intel Core2Duo 2.0 GhzArch linu=

x based system: Linux audio 3.6.11-rt25-1-rt #1 SMP PREEMPT RT Tue Dec 25 0=

0:18:17 CET 2012 x86_64 GNU/LinuxSoundcards: RME Multiface II, running =

trough PCMCIA adapter. Also have an Echo Indigo DJ card, PCMCIA too.
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