Re: OS for realtime operation

[Raffaele Morelli <raffaele.morelli@xxxxxxxxx>]

2012/1/13 david <gnome@xxxxxxxxxxxxx>

On 01/12/2012 06:15 AM, tee wrote:

Hello,

On 10/01/2012 13:44, Paul Davis wrote:

2) the PREEMPT_RT kernel is substantially "more realtime" than any
version of windows or OS X that you could lay your hands on. its more
like an actual realtime OS than the kind of general purpose OS that
regular Linux, Windows and OS X represent, though without actually
being suitable (quite) for "hard RT" tasks.

if someone needs such a kernel for debian, they are available at
http://pengutronix.de/software/linux-rt/debian_en.html

I tried that once. Booting it just led to panics. I decided it didn't like my hardware for whatever reason.

I'm doing ok with the stock Debian Sid kernel, but I don't need latency as low as others might.

Just to spread some KISS :-)
Compiling a debian RT kernel is quite straightforward.

Download debian sources or vanilla ones from kernel.org
Patch according to your release ( http://www.kernel.org/pub/linux/kernel/projects/rt/ )

Run `make oldconfig` inside the sources dir, you will probably be asked about configs in the newer kernel not found in .config-YOUR_RUNNING_KERNEL

Then follow the common workflow, run `make menuconfig`, at least change only the PREEMPT opt and seti it to 'complete preemption'.

Create your linux-image debian package with make-kpkg (http://www.debian.org/releases/stable/i386/ch08s06.html.en)

If your running kernel works this one will too 99.9%

my 0.02€
regards
-r

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