System tuning in a nut shell:
+ install linux-rt
https://aur.archlinux.org/packages.php?ID=51360
+ To make the most of it, since linux 2.6.39 you can include
`threadirqs` in your kernel boot line.
+ Remember to install the package `rtirq`
+ include `rtirq` in your DAEMONS array in `/etc/rc.conf`. For example:
DAEMONS=(dbus hal syslog-ng rtirq @alsa @wicd)
+ Add to `/etc/secutiry/limits.conf`
@audio - rtprio 99
@audio - memlock unlimited
+ If you use firewire soundcards, include in your MODULES array in
`/etc/rc.conf`:
MODULES=(firewire-core firewire-ohci)
+ Add yourself to the `audio` group
usermod -a -G audio **yourUserID**
+ Add to `/etc/sysctl.conf`
vm.swappiness = 10
fs.inotify.max_user_watches = 524288
+ Add to `/etc/udev/rules.d/40-hpet-permissions.rules`
KERNEL=="rtc0", GROUP="audio"
KERNEL=="hpet", GROUP="audio"
+ Set the cpufreq governor to `performance`. See the
[ArchWiki article](https://wiki.archlinux.org/index.php/Cpufreq#Daemon)
+ To use ALSA applications with JACK (web browsers and other
applications without JACK support) you can install the package
`alsa-plugins` and add the following to `~/.asoundrc`
# convert alsa API over jack API
# use it with
# % aplay foo.wav
# use this as default
pcm.!default {
type plug
slave { pcm "jack" }
}
ctl.mixer0 {
type hw
card 1
}
# pcm type jack
pcm.jack {
type jack
playback_ports {
0 system:playback_1
1 system:playback_2
}
capture_ports {
0 system:capture_1
1 system:capture_2
}
}
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