rt [www.who.is.free.fr]

DEBIAN

apt-cache  search linux-image | grep PREEMPT_RT | sort -rn
sudo apt-get install linux-image-rt-amd64 linux-headers-rt-amd64
sudo apt-get install rtirq-init

http://packages.qa.debian.org/l/linux-latest.html

ObsoletE :

deb http://kernel-archive.buildserver.net/debian-kernel/ trunk main

wget http://people.redhat.com/mingo/realtime-preempt/patch-2.6.20-rt5\
  -O - | patch -p1 -b # [[RT]]

http://forums.debian.net/viewtopic.php?p=50124#50124 # Debian linux-image
http://bugs.debian.org/350878

Resources

http://rt.wiki.kernel.org/index.php/Main_Page
http://people.redhat.com/mingo/realtime-preempt/

https://wiki.ubuntu.com/RealTime

http://sourceforge.net/mailarchive/forum.php?thread_id=1079993&forum_id=7073 # RT + IRQ
http://www.scicos.org/ScicosHIL/SCICOS_HIL_ULW_11.pdf # USB + RT
http://sourceforge.net/projects/realtime-lsm/
http://proaudio.tuxfamily.org/wiki/index.php?title=Howto_RT_Kernel#testing_RT_audio

http://www.ubuntuforums.org/showthread.php?p=2173943#post2173943
http://forum.ubuntu-fr.org/viewtopic.php?pid=753262#p753262
http://www.linuxmao.org/tikiwiki/tiki-index.php?page=Acc%C3%A8s+temps+r%C3%A9el+pour+les+applications#_set_rtlimit_set_rlimits
https://wiki.ubuntu.com/UbuntuStudio
https://rt.wiki.kernel.org/index.php/CONFIG_PREEMPT_RT_Patch#Platforms_Tested_and_in_Use_with_CONFIG_PREEMPT_RT

Real Time [[Linux]]

http://rt.wiki.kernel.org/index.php/Main_Page

wget http://people.redhat.com/mingo/realtime-preempt/older/patch-2.6.18-rt7 \
  -O - | patch -p1 -b # [[RT]]

# "Processor type and features" / High Resolution Timer Support 
sudo apt-get install schedutils htop

dmesg | grep "Real-Time Preemption Support" 
ps aux | grep "\[IRQ"
cat /proc/interrupts

qjackctl

jackd -R -P80 -v -d alsa

ps aux | grep jackd
rzr      10780  0.8  7.4  36128 36156 pts/2    SLl+ 14:26   0:00 jackd -R -P80 -v -d alsa

htop 
11186 rzr      -81   0 36160 36156  3012 S  0.6  3.4  0:00.88 jackd -R -P80 -p128 -dalsa -dhw:0 -r44100 -p1024 -n2 -S

should be SLsl :

7947  0.9  1.3  20388 20400 ?        SLsl 14:29   0:02 jackd -R -p128 -dalsa -dhw:0 -r44100 -p128 -n3 -P -o2

http://www.nabble.com/Can't-get-jackd-to-run-at-RT-prio-t3126761.html
http://news.gmane.org/gmane.comp.audio.jackit
http://gentoo-wiki.com/HOWTO_Jack#Realtime_mode

errors:

jackd  -R -d alsa
jackd 0.109.2
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
cannot use real-time scheduling (FIFO at priority 10) [for thread -1210325328, from thread -1210325328] (1: Operation not permitted)
cannot create engine


sudo jackd  -R -d alsa
[sudo] password for rzr: 
jackd 0.109.2
Copyright 2001-2005 Paul Davis and others.
jackd comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

JACK compiled with System V SHM support.
loading driver ..
creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit
control device hw:0
configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods
ALSA: final selected sample format for capture: 16bit little-endian

[[Sound]]

LANG=C /usr/bin/qjackctl
#  cannot use real-time scheduling (FIFO at priority 0)
# [for thread -1225036880, from thread -1225036880] (22: Invalid argument)

Realtime Linux Security Module

http://sourceforge.net/projects/realtime-lsm/

# http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.16.11.tar.bz2

sudo apt-get install realtime-lsm-source realtime-lsm # [[Debian]]
sudo m-a --text-mode prepare update
sudo m-a auto-install --text-mode  realtime-lsm
# Failed: Security Capabilities not configured as module
# Realtime LSM will not work with /lib/modules/2.6.15.6-k7-amiloa/source

Set Y in linux-kernel/security options