July 17-19 | Tokyo, Japan
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Wednesday, July 17 • 17:10 - 17:50
Cyclic Tests Unleashed: Large-Scale RT Analysis with Jitterdebugger - Wolfgang Mauerer, OTH Regensburg / SiemensAG & Daniel Wagner, SiemensAG

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Jitterdebugger is a new tool for testing the preempt_rt real time extensions for the Linux kernel. While the basic principles for this endeavour (run a cyclic task on one or more CPUs, and store the measured latencies) seem very straightforward at a first glance, the devil is in the details -- in particular, if evaluations beyond computing simple descriptive results should take place, and if machines and systems are subjected to systematic testing over long periods of time.
The talk starts with an introduction to architecture and usage of the jitterdebugger tool, and will (of course) also address the question how it differs from the cyclictest tool suite. We will then discuss archival strategies for keeping recorded data reproducible in the long run (a non-trivial problem!), and discuss several types of statistical evaluation that are made possible by jitterdebugger's new capabilities.


Daniel Wagner

Senior Engineer, Siemens AG
Daniel Wagner is one of the stable-rt maintainers, maintainer of the preempt_rt real-time extensions of the CIP kernel, and primary author of jitterdebugger.
avatar for Wolfgang Mauerer

Wolfgang Mauerer

Professor/Senior Research Scientist, Technical University of Applied Sciences Regensburg
Wolfgang Mauerer is a professor of theoretical computer science at the Technical University Regensburg, and a senior key expert at Siemens Corporate Research, Competence Centre Embedded Linux. He serves on the technical steering committee of the Linux Foundation's Civil Infrastructure... Read More →

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Wednesday July 17, 2019 17:10 - 17:50 JST
Meeting Room 1 (Floor 5F)
  Linux Systems