On this same subject, I'd like to make people aware of tutorials for
installing Xenomai, an alternative real time kernel, on Ubuntu.  Thanks to
JHU LCSR for putting them together.

Precise:
https://code.google.com/p/jhu-lcsr-ros-pkg/wiki/UbuntuXenomaiPrecise
Lucid: https://code.google.com/p/jhu-lcsr-ros-pkg/wiki/UbuntuXenomai

I've had no problems with these tutorials and Xenomai has worked well for
my 1kHz ethercat control loop.

-Kelsey
On Sep 18, 2014 7:25 AM, "Jürgen Kunz" <kunz@sim.tu-darmstadt.de> wrote:

>  Hi Dorian, hi Yanzhen,
>
> in Ubuntu 12.04 the RT-Preempt kernels from official Debian wheezy
> repository can be used. The 3.2-rt kernel from debian wheezy works without
> any additional changes. The 3.14-0.bpo.2-rt kernel from debian
> wheezy-backports requires udev packages to be installed from
> wheezy-backports repository. Otherwise the system will not boot.
>
> In Ubuntu 14.04, the 3.14 RT-Preempt kernel from Debian jessie can be used.
>
> Best regards,
> Jürgen
>
> Am 2014-09-18 12:15, schrieb Dorian Scholz:
>
> Hi Yanzhen,
>
> thanks for your work.
> This would indeed be interesting, as I'm still using a quite old 3.2.0-rt
> Debian kernel.
>
> But there is some information missing about the packages you provide:
>
> 1) the downloads are only possible with login
>
> 2) it does not say what these packages actually do
> I assume they use bash scripts during the install to download and patch
> the kernel source, compile and install it?
>
> 3) where is the source for building these packages?
> I don't think anyone here would simply install packages without knowing
> what is actually being executed...
> Making the package source available would also be helpful to adapt it for
> other systems.
>
> 4) On which Linux distributions and versions was this tested?
>
> Cheers,
> Dorian
>
>
> On 18/09/14 03:19, Yanzhen Wang wrote:
>
>   Hi everyone,
>
>  A real-time host OS may be needed when one is dealing with real-time
> guarantees in ROS applications. To make the installation of an rt-patched
> Linux kernel much easier, we created two Debian packages which do most of
> the work. They uses the Linux 3.8.13-rt16 RT-PREEMPT patch for 32-bit and
> 64-bit systems, respectively.
>
>  If you would like to give them a try, you can download the packages from
> the following links:
> 32-bit:
> http://micros.nudt.edu.cn/ros/attachments/download/6409/linux-image-3.8.13-rt16-i386-v0.0.1.deb
> 64-bit:
> http://micros.nudt.edu.cn/ros/attachments/download/6413/linux-image-3.8.13-rt16_3.8.13-rt16-10.00.Custom_amd64.deb
>
>  Place the corresponding package in any directory, and then run the
> following command and reboot the system.
> sudo dpkg -i linux-image-XXXX.deb
>
>  Now the real-time kernel will be there.
>
>  We would be grateful if you can try them out and any feedback would be
> greatly appreciated.
>
> Best regards,
> Yanzhen
>
>
>
> _______________________________________________
> ros-users mailing listros-users@lists.ros.orghttp://lists.ros.org/mailman/listinfo/ros-users
>
>
>
> --
> Dipl.-Inform. Dorian Scholz         E-Mail:scholz(at)sim.tu-darmstadt.de
> Simulation, Systems Optimization    Phone:  +49 (0) 6151 16-4811
> and Robotics Group                  Fax:    +49 (0) 6151 16-6648
> Technische Universität Darmstadt    http://www.sim.tu-darmstadt.de
> Hochschulstr. 10                    D-64289 Darmstadt, Germany
>
>
>
> _______________________________________________
> ros-users mailing listros-users@lists.ros.orghttp://lists.ros.org/mailman/listinfo/ros-users
>
>
> --
> Dipl.-Inform. Jürgen Kunz
>
> Technische Universität Darmstadt <http://www.tu-darmstadt.de>
> FG Simulation, Systemoptimierung und Robotik
> <http://www.sim.tu-darmstadt.de>
> Hochschulstr. 10
> 64289 Darmstadt
>
> Tel.: ++49 (0) 6151-16-70383
> Fax: ++49 (0) 6151-16-6648
> E-Mail: kunz(at)sim.tu-darmstadt.de
> Homepage: http://www.sim.tu-darmstadt.de
>
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