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A Real-Time Capable Virtualized Information and Communication Technology Infrastructure for Automotive Systems

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Advances in Real-Time Systems

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Abstract

Embedded information technology (IT) is the dominating enabler for advanced driver assistance systems and for the continued introduction of innovations in automotive products. Today’s Car-IT architecture is characterized by a large number of dedicated function electronic control units (ECUs) with relatively low-performance microcontrollers and a heterogeneous set of low-capacity, automotive-specific communication buses. Over the past decades, the approach to add one ECU per new function has led to a complex, difficult to maintain and costly Car-IT infrastructure (Fig. 14.1).

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Notes

  1. 1.

    In analogy to AUTOSAR [1], the real-time domains are equivalent to AUTOSAR Software Components (SW-C). The API is the connection to the Virtual Functional Bus (VFB), or the AUTOSAR Runtime Environment (RTE) respectively.

  2. 2.

    For a better understanding of our optimization concept, we assume an ECU architecture as depicted in Fig. 14.10b: An ECU consists of several cores that all share a common L2 (level 2) cache. Each core, however, has its own private L1 (level 1) cache that cannot be accessed by any other core. Further, each core can only execute one single thread – a constraint that can be omitted later on by a simple adaption of the proposed optimization scheme.

  3. 3.

    Certainly, if a multicore processor also includes SMT (simultaneous multi threaded; named hyper-threaded by Intel) cores, then cache contention is maximized on applications that run on such an SMT core at the same time, as those applications then share the L1 and L2 cache permanently for the duration of their timeslice.

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Authors and Affiliations

  1. Technische Universität München, Arcisstr. 21, D-80333, München, Germany

    S. Drössler, M. Eichhorn, S. Holzknecht, B. Müller-Rathgeber, H. Rauchfuss, M. Zwick, E. Biebl, K. Diepold, J. Eberspächer, A. Herkersdorf, W. Stechele & E. Steinbach

  2. BMW Forschung und Technik GmbH, Munich, Germany

    R. Freymann, K.-E. Steinberg & H.-U. Michel

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  1. S. Drössler
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  2. M. Eichhorn
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Corresponding author

Correspondence to A. Herkersdorf .

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Editors and Affiliations

  1. LS für Realzeit-Computersysteme, TU München, Arcisstraße 21, München, 80290, Germany

    Samarjit Chakraborty

  2. LS Kommunikationsnetze, TU München, Arcisstr. 21, München, 80290, Germany

    Jörg Eberspächer

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Drössler, S. et al. (2012). A Real-Time Capable Virtualized Information and Communication Technology Infrastructure for Automotive Systems. In: Chakraborty, S., Eberspächer, J. (eds) Advances in Real-Time Systems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24349-3_14

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  • DOI: https://doi.org/10.1007/978-3-642-24349-3_14

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