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2022-07-05 - 11:19

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


2016-09-17 12:00

Preemption latency of real-time Linux systems

How to measure it – and how to fix it, if it's too high?



Real Time Linux Workshops

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

Twelfth Real-Time Linux Workshop on October 25 to 27, in Nairobi, Kenya

When Do Real Time Systems Need Multiple CPUs?

Paul McKenney, IBM Linux Technology Center

Until recently, real-time systems were always single-CPU systems. The prospect of multiprocessing has arrived with the advent of low-cost and readily available multi-core systems. Now many RTOSes, perhaps most notably Linux, provide real-time response on multiprocessor systems.

However, this begs the question as to whether your real-time application should avail itself of parallelism. Furthermore, if the answer is "yes," the next question is what form of parallelism you application should avail itself of: shared memory parallelism with locking and threads, process pipelines, multiple cooperating processes, or one of a number of other approaches.

This paper will examine these questions, providing rules of thumb to help you choose whether your real-time application should be parallel, and, if so, what sort of parallelism is best for you.