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Copyright © Philippe Gerum 2005-2015
Copyright © Gilles Chanteperdrix 2015
Copyright © Free Electrons 2004-2015
Copyright © Siemens AG, 2015
Creative Commons BY-SA 3.0 license
Xenomai 3 – An Overview of the
Real-Time Framework for Linux

Page 2 April 2016 Jan Kiszka, Corporate Technology © Siemens AG 2015, et al. Creative Commons BY-SA 3.0 license.
Xenomai 3 – An Overview of the
Real-Time Framework for Linux
Agenda
Project introduction
Co-Kernel technology, now and then
Xenomai 3 for native Linux
Improving co-kernel integration
Summary

Page 3 April 2016 Jan Kiszka, Corporate Technology © Siemens AG 2015, et al. Creative Commons BY-SA 3.0 license.
What is Xenomai?
•
Old-style real-time extension for Linux?
•
Something like / a fork of RTAI?
•
Requires real-time applications to be kernel modules?
•
…?

Page 4 April 2016 Jan Kiszka, Corporate Technology © Siemens AG 2015, et al. Creative Commons BY-SA 3.0 license.
What is Xenomai really?
•
Old-style real-time extension for Linux?
•
Something like RTAI / RTLinux?
•
…
•
RTOS-to-Linux portability framework
•
Come in two flavors
•
As co-kernel extension for (patched) Linux
•
As libraries for native Linux (including PREEMPT-RT)
Xenomai is an RTOS-to-Linux
Portability Framework
It now comes in two flavors
•
As co-kernel extension for (patched) Linux
•
As libraries for native Linux (including PREEMPT-RT)

Page 5 April 2016 Jan Kiszka, Corporate Technology © Siemens AG 2015, et al. Creative Commons BY-SA 3.0 license.
Xenomai History
Xenomai 1.0
•
Announced in 2001 – as portability framework for RTOS applications
•
Required a real-time basis
•
Development of ADEOS layer for Linux and RTAI
•
Merged with RTAI => RTAI/fusion
Xenomai 2.0
•
Departed from RTAI in 2005 – incompatible design goals
•
Evolved ADEOS to I-pipe layer (also used by RTAI)
•
Ported to 6 architectures
Xenomai 3.0
•
Released in 2015 after >5 years of development
•
Rework of in-kernel core (now POSIX-centric)
•
Support for native Linux
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