Dates and Events:
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OSADL Articles:
2023-11-12 12:00
Open Source License Obligations Checklists even better now
Import the checklists to other tools, create context diffs and merged lists
2022-07-11 12:00
Call for participation in phase #4 of Open Source OPC UA open62541 support project
Letter of Intent fulfills wish list from recent survey
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
2017-09-12 12:00
OSADL project to create Open Source license checklists
Facilitate Open Source software delivery |
Hannover Messe 2024
HOT - Heidelberg OSADL Talks 2024 (online event)
OSADL Networking Day 2024 in Heidelberg, Germany
Real Time Linux Workshops
1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010
Eighth Real-Time Linux Workshop on October 12 to 15, 2006, in Lanzhou, Gansu, P.R.China
Embedded RTLinux: A New Stand-Alone RTLinux Approach
Miguel Masmano, Apolinar Gonzalez, Ismael Ripoll, and Alfons CrespoUniversidad Politecnica de Valencia, Spain
Universidad de Colima (Mexico)
mimastelªdoctor.upv.es
apogonlªucol.mx
iripollªdisca.upv.es
alfonsªdisca.upv.es
Ismael Ripoll, Jorge Real, and Alfons Crespo
Technical University of Valencia
Camino de Vera 1, Valencia, Spain
(iripoll, jorge, alfons)@disca.upv.es
RTLinux is a hard Real-Time OS (RTOS) which uses an original approach to develop complex hard real-time applications in a fairly easy way: Executing a hard RTOS (RTLinux itself) jointly with Linux in the same box. This approach enables splitting up a hard real-time application according to its criticality, the part with deadline requirements is run on the RTOS while the part with no ``special'' time requirements is executed on Linux.
However, this approach presents two drawbacks. Firstly, Linux has a big footprint, especially in the 2.6 series, which is unsuitable for system with low resources. On the other hand, it is possible for a Linux application to directly disable interrupts, disrupting the real-time properties of RTLinux.
Several years ago, people from our department developed Stand-Alone RTLinux (SA-RTL), a RTLinux-compatible standalone kernel which was able to execute RTLinux applications in a bare machine. However, this approach was not completely optimum since was built cutting and pasting code from RTLinux, being rather difficult to maintain. Besides, it did not provide binary compatibility with RTLinux applications.
In this paper we present Embedded RTLinux (ERTL), our second approach of what a Stand-Alone RTLinux system should be. This second kernel, unlike SA-RTL, just replaces Linux with a minimal set of drivers, allowing to execute the original RTLinux jointly with a RTLinux application on a bare machine.
