Re: [PD] PD and latency on kernel 2.6.14.2-lsm

Hi Wade,

thewade wrote:

How do I tune PD to run as fast as possible?

I'm sure you have a lot of these covered already!

• Run as root (or with LSM).
• Run with the -rt flag.
• Ditch Gnome and use something super-lightweight like fluxbox.
• Make sure there is no IRQ conflicts between your graphics card, sound

card and peripherals: --> http://tinyurl.com/7vhmc

• Using a shared-memory graphics card, such as the Intel chipset Frank

Barknecht discussed with Ed Kelly this week, is reported by RME to cause dropouts: --> http://tinyurl.com/dcdvk

• Also look into your hard drive access times if any disk activity needs

to happen during performance: --> http://tinyurl.com/cedtl

• Realtime, low latency kernel patches (does not apply to PPC achitecture!)
• Check out Linux Security Mode patches to run RT as non-root.
• Don't use frequently-updated graphics in your patches (i.e. VU meters

or number boxes connected to a fast stream of numbers, etc etc).

• Run one instance of pd -noaudio for your GUI, and use OSC to

communicate with another instance of pd -nogui for your DSP. The poor man's multithreading!

• Only start PD with as many ALSA/JACK channels as you need.
• Consider using -nodac/-noadc if they are not needed.