Re: options for hard real time kernel for raring 13.04

[Marco Donnarumma <devel@xxxxxxxxxxxx>]

Thanks guys!

@Raffaele: that's great, didn't know there were more recent rt-kernels for debian. I have a 32bit machine, so I'm going to try this one:
http://packages.debian.org/jessie/linux-image-3.10-2-rt-686-pae

I have an nvidia driver (sigh), I guess it's likely that rt-kernel is not going to like it. I read I could patch some nvidia stuff into the rt-kernel, but that's another story. I'll try this first.

@Emiliano: yes, I do set the governor to "performance" when I need it. I also wondered, maybe it could also be a faulty firewire cable causing the random freeze?

Is the D-Bus enabled an annoyance to low-latency processes?

thanks again,

cheers,

M

--
Marco Donnarumma
New Media + Sonic Arts Practitioner, Performer, Teacher, Director.
Embodied Audio-Visual Interaction Research Team.
Department of Computing, Goldsmiths University of London
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Portfolio: http://marcodonnarumma.com
Research: http://res.marcodonnarumma.com
Director: http://www.liveperformersmeeting.net

On Wed, Sep 11, 2013 at 12:26 PM, Emiliano Grilli <emiliano.grilli@xxxxxxxxx> wrote:

It may sound obvious, but: did you checked that your are using the "performance" governor for cpu frequency scaling?

I found that using the "ondemand" governor can cause more xruns...

I don't know mint but there should be a cpufreq-utils package that provides relevant utilities for this.

HTH
Ciao

Il giorno 11/set/2013 10:53, "Marco Donnarumma" <devel@xxxxxxxxxxxx> ha scritto:

Hey all,

I just switched to Mint Olivia 15 (based on Ubuntu Raring 13.04). I use quite cpu-intensive puredata patches with processing of 2 live audio inputs on a firewire soundcard through ffado and qjackctl (jack2).

Although my machine runs a low-latency kernel and it has been configured for pro audio (I use the realtimeConfigurationScan script), I still get xruns and sometimes qjackctl randomly hangs up making the sound to stop completely.

Before, I used to work with ubuntu 10.04 and rt-kernel without a itch. Is anybody still using a rt-kernel with the latest Mint or Ubuntu, or just refining settings etc..?

if a rt-kernel is the best option, should I patch mine, since it looks like there are no packaged rt-kernels for Raring?
Can't access Abogani ppa, and KXS kernels are available up to Precise.

thanks in advance for any hint, or suggestions about what to try!

best wishes,

--
Marco Donnarumma
New Media + Sonic Arts Practitioner, Performer, Teacher, Director.
Embodied Audio-Visual Interaction Research Team.
Department of Computing, Goldsmiths University of London
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Portfolio: http://marcodonnarumma.com
Research: http://res.marcodonnarumma.com
Director: http://www.liveperformersmeeting.net

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