About Xenomai

Xenomai is a Free Software project in which engineers from a wide background collaborate to build a versatile real-time framework for the Linux© platform.

The main project goal is to help migrating industrial applications from proprietary real-time systems to Linux.

Xenomai is about making various real-time operating system APIs available to Linux-based platforms. When the target Linux kernel cannot meet the requirements with respect to response time constraints, Xenomai can also supplement it for delivering stringent real-time guarantees based on an original co-kernel technology.

Originally named Xenodaptor, the project that would soon become Xenomai was announced on August 2001 by Philippe Gerum. The Xenomai 1.0 milestone was reached in March 2002.

In its early days, Xenomai used to be an add-on component to real-time Linux variants for emulating traditional RTOS, originally based on a dual kernel approach. Over the years, it has become a full-fledged real-time Linux framework on its own terms, also available on single/native kernel systems.

Adeos/I-pipe is a companion project to Xenomai, which implements a key component of a dual kernel configuration: the interrupt virtualization mechanism delivering high priority events to the Xenomai co-kernel with short and predictable latencies. Xenomai was the first real-time extension to be ported over the I-pipe, followed a year after by RTAI.

In the 2003-2005 period, the original core team members – namely Gilles Chanteperdrix and Philippe Gerum – contributed significantly to the RTAI project, before focusing back on Xenomai’s own goals, which led to the release of Xenomai 2.0 in October 2005.

Since then, Xenomai has been actively maintained and ported to various CPU architectures, for a user base mainly involved in the industrial automation industry.

The Xenomai 3 architecture introduces a paradigm shift, as users are no more tied to the dual kernel configuration enabled by the I-pipe, but may run the real-time APIs and their applications transparently over a single kernel configuration as well.

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