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2022-11-27 - 00:48

Dates and Events:

OSADL Articles:

2022-01-13 12:00

Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed

Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached

2021-02-09 12:00

Open Source OPC UA PubSub over TSN project phase #3 launched

Letter of Intent with call for participation is now available

2016-11-12 12:00

Raspberry Pi and real-time Linux

Let's have a look at the OSADL QA Farm data

Real Time Linux Workshops

1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010 - 2011 - 2012 - 2013 - 2014 - 2015

Eleventh Real-Time Linux Workshop on September 28 to 30, in Dresden, Germany

Announcement - Hotels - Agenda - Paper Abstracts - Presentations - Registration - Abstract Submission - Xenomai User Meeting - Sponsors


Myths and Realities of Real-Time Linux Software Systems

Kushal Koolwal, VersaLogic Corporation

This paper is a very basic introduction on real-time concepts and on the state of real-time patches in the Linux kernel project. We start off with definition of real-time systems and some of the important metrics (Interrupt Latency, Scheduling Latency and Worst-case Latency) and explain each one of them with an analogy.

We also address some of the differences between real-time and general purpose operating systems which include analysis of several common misconceptions including performance issues, latency, hard vs. soft real-time systems, programming APIs and the software kernel.

We then step into the Linux kernel land discussing the current state of PREEMPT_RT patch and some of the other soft real-time features that are available in Linux kernel. Lastly we talk about improvements in latency effects with respect to kernel device drivers and the corresponding framework stack.