The Community for Technology Leaders
2016 28th Euromicro Conference on Real-Time Systems (ECRTS) (2016)
Toulouse, France
July 5, 2016 to July 8, 2016
ISSN: 2159-3833
ISBN: 978-1-5090-2812-2
pp: 109-119
Complex embedded systems today commonly involve a mix of real-time and best-effort applications. The recent emergence of low-cost multicore processors raises the possibility of running both kinds of applications on a single machine, with virtualization ensuring isolation. Nevertheless, memory contention can introduce other sources of delay, that can lead to missed deadlines. In this paper, we present a combined offline/online memory bandwidth monitoring approach. Our approach estimates and limits the impact of the memory contention incurred by the best-effort applications on the execution time of the real-time application. We show that our approach is compatible with the hardware counters provided by current small commodity multicore processors. Using our approach, the system designer can limit the overhead on the real-time application to under 5% of its expected execution time, while still enabling progress of the best-effort applications.
embedded systems, multiprocessing systems, virtualisation

A. Blin, C. Courtaud, J. Sopena, J. Lawall and G. Muller, "Maximizing Parallelism without Exploding Deadlines in a Mixed Criticality Embedded System," 2016 28th Euromicro Conference on Real-Time Systems (ECRTS), Toulouse, France, 2016, pp. 109-119.
264 ms
(Ver 3.3 (11022016))