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

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To: Louis Gorenfeld <louis.gorenfeld@...>
Cc: <linux-audio-user@...>
Date: Sunday, February 10, 2013 - 6:25 pm

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On Sun, Feb 10, 2013 at 5:34 PM, Louis Gorenfeld
wrote:

> devices don't perform as well on the 3.x series kernels compared to my old

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.

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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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 opinio=
n. Currently running a 3.6.11-rt kernel, and getting very low latencies fro=
m it, on a modest 5 year old laptop.
We're talking 0.666 ms, while compiling a kernel, 0 xruns.Notes=
:-logged in as root (yes yes, i know)-rtirq running on startup to f=
ix 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-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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Messages in current thread:
Re: [LAU] So what do you think sucks about Linux audio ?, shane richards, (Fri Feb 8, 9:17 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Chris Bannister, (Sun Feb 10, 2:36 am)
Re: [LAU] So what do you think sucks about Linux audio ?, hermann meyer, (Sun Feb 10, 5:38 am)
Re: [LAU] So what do you think sucks about Linux audio ?, hermann meyer, (Sun Feb 10, 6:05 am)
Re: [LAU] So what do you think sucks about Linux audio ?, Ralf Mardorf, (Sun Feb 10, 11:19 am)
Re: [LAU] So what do you think sucks about Linux audio ?, Dan MacDonald, (Sun Feb 10, 9:33 am)
Re: [LAU] So what do you think sucks about Linux audio ?, Ricardus Vincente, (Sun Feb 10, 2:53 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Raffaele Morelli, (Sun Feb 10, 3:53 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Louis Gorenfeld, (Sun Feb 10, 2:45 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Ralf Mardorf, (Sun Feb 10, 12:24 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Alexandre Prokoudine, (Sun Feb 10, 10:33 am)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 10:33 pm)
Re: [LAU] kernel changes, Folderol, (Tue Feb 12, 2:57 pm)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 6:09 pm)
Re: [LAU] kernel changes, Ralf Mardorf, (Sun Feb 10, 6:44 pm)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 10:58 pm)
Re: [LAU] kernel changes, Paul Davis, (Sun Feb 10, 11:03 pm)
Re: [LAU] kernel changes, Len Ovens, (Mon Feb 11, 12:38 am)
Re: [LAU] kernel changes, Paul Davis, (Mon Feb 11, 1:05 am)
Re: [LAU] kernel changes, Len Ovens, (Tue Feb 12, 2:42 pm)
Re: [LAU] kernel changes, Ralf Mardorf, (Mon Feb 11, 2:17 am)
Re: [LAU] kernel changes -was - So what do you think sucks a..., Harry van Haaren, (Sun Feb 10, 6:25 pm)
Re: [LAU] kernel changes -was - So what do you think sucks a..., Harry van Haaren, (Mon Feb 11, 12:12 am)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 5:59 pm)
Re: [LAU] kernel changes, Ralf Mardorf, (Sun Feb 10, 6:30 pm)
Re: [LAU] kernel changes, Len Ovens, (Sun Feb 10, 9:09 pm)
Re: [LAU] So what do you think sucks about Linux audio ?, Raffaele Morelli, (Sun Feb 10, 3:48 pm)