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2023-06-06 - 18:37

Dates and Events:

OSADL Articles:

2023-03-01 12:00

Embedded Linux distributions

Results of the online "wish list"

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

Ninth Real-Time Linux Workshop on November 2 to 4, 2007, in Linz, Austria

Realtime capabilities of low-end PowerPC and ARM boards for embedded systems

Alexander Bauer

With the stepwise integration of the Realtime Preemption Patches (RT-Preempt) into the Mainline Linux kernel and their support for architectures other than Intel and AMD, there are now a number of choices which board to use for a particular embedded realtime project running Mainline Linux. In order to select the appropriate processor and clock frequency, it would be desirable to have some generally applicable ranges of worst-case latencies that can be obtained using the various processor types and conditions. We, therefore, determined the internal worst-case latency of PowerPC and ARM boards running Linux 2.6.20 and above patched with RT-Preempt. The PowerPC-board (Phytec phyCORE-MPC5200B) was running at 266 and 400 MHz, the ARM board (Phytec phyCORE-PXA270) was running at 266 and 520 MHz. This talk will provide the details of the various measurement set-ups, present the results and discuss them with respect to the design differences between PowerPC and ARM.


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