Timing Analysis for Hypervisor-based I/O Virtualization in Safety-Related Automotive Systems 2017-01-1621
The increasing complexity of automotive functions which are necessary for improved driving assistance systems and automated driving require a change of common vehicle architectures. This includes new concepts for E/E architectures such as a domain-oriented vehicle network based on powerful Domain Control Units (DCUs). These highly integrated controllers consolidate several applications on different safety levels on the same ECU. Hence, the functions depend on a strictly separated and isolated implementation to guarantee a correct behavior. This requires middleware layers which guarantee task isolation and Quality of Service (QoS) communication have to provide several new features, depending on the domain the corresponding control unit is used for. In a first step we identify requirements for a middleware in automotive DCUs. Our goal is to reuse legacy AUTOSAR based code in a multicore domain controller. In an example use case scenario, we analyze the end-to-end latency for transmitting and receiving CAN messages in a system using a hypervisor-based virtualization approach. A model-based timing analysis and an implementation on a state-of-the-art automotive microcontroller shall help to assess the usability for safety-related domains. Additionally, the timing behavior is compared to a common AUTOSAR implementation. We could show that a well-configured hypervisor and scheduling can provide similar results as an AUTOSAR implementation under certain circumstances. Furthermore, a model-based timing analysis allows evaluating different hypervisor configurations without physical hardware.
Citation: Kohn, A., Schmidt, K., Decker, J., Sebastian, M. et al., "Timing Analysis for Hypervisor-based I/O Virtualization in Safety-Related Automotive Systems," SAE Int. J. Passeng. Cars – Electron. Electr. Syst. 10(2):368-379, 2017, https://doi.org/10.4271/2017-01-1621. Download Citation
Author(s):
Andre Kohn, Karsten Schmidt, Jochen Decker, Maurice Sebastian, Alexander Züpke, Andreas Herkersdorf
Affiliated:
AUDI AG, Easycore GmbH, Symtavision GmbH, RheinMain University of Applied Sciences, Technical University of Munich
Pages: 12
Event:
WCX™ 17: SAE World Congress Experience
ISSN:
1946-4614
e-ISSN:
1946-4622
Also in:
SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V126-7EJ, SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V126-7
Related Topics:
Vehicle networking
Automated Vehicles
Architecture
Computer software and hardware
Control systems
Planning / scheduling
Electronic control units
Hardware
Integrated circuits
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »