Thanks for the clarification, I though I read that a RT-Kernel would improve on the pureData responsiveness for the raspberry pi, good to know that it's probably not needed.
On 09/11/2012 06:59 PM, pd-list-request@iem.at wrote:
Date: Tue, 11 Sep 2012 17:42:03 +0200 From: Charles Goyardcg@fsck.fr Subject: Re: [PD] another day's raspberry pi experiences To:pd-list@iem.at Message-ID:20120911154203.GB2645@tip Content-Type: text/plain; charset=us-ascii
Geoffroy wrote:
I read that a real time kernel would be quite useful on a raspberry pi for pure data, and I wonder if this project would help:
Maybe there's a confusion between real-time priority (standard kernel) and hard real-time (RT kernel).
Hard real-time is more for really time-critical stuff down to microseconds, like driving a CNC or stuff. Having a real-time task running can feel like your computer is super-slow. It's more made for single task processing.
As far as pd is concerned, I'd say real-time priority is enough, and is configured with /etc/security/limits.conf.
++ -- Charlot
You're welcome.
If you can find where you read that, I'd be interrested.
geoffroy wrote:
Thanks for the clarification, I though I read that a RT-Kernel would improve on the pureData responsiveness for the raspberry pi, good to know that it's probably not needed.
The archives of linux-audio probably have a few gems of goodness, it has been a perennial discussion for years.
Hard real time, combined with the proper timer structure is necessary where you want the device to be sequenced by incomming events like MIDI, without jittery behaviour. Raising the userland process to realtime priority will ensure sustained throughput. I think it does warrent a more serious consideration of the Broadcom BCM2835 hardware relation to kernel for musical use. No doubt compromises have been made for Raspbian to be a general purpose all round distro.
Andy
On Tue, Sep 11, 2012 at 08:25:23PM +0200, Charles Goyard wrote:
You're welcome.
If you can find where you read that, I'd be interrested.
geoffroy wrote:
Thanks for the clarification, I though I read that a RT-Kernel would improve on the pureData responsiveness for the raspberry pi, good to know that it's probably not needed.
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