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Parcus: Energy-Aware and Robust Parallelization of AUTOSAR Legacy Applications
Kehr, Sebastian; Quiñones, Eduardo; Langen, Dominik; Böddeker, Bert; Schäfer, Günter
Barcelona Supercomputing Center
Embedded multicore processors are an attractive alternative to sophisticated single-core processors for the use in automobile electronic control units (ECUs), due to their expected higher performance and energy efficiency. Parallelization approaches for AUTOSAR legacy software exploit these benefits. Nevertheless, these approaches focus on extracting performance neglecting the system's worst-case sensor/actuator latency and energy consumption. This paper presents Parcus, an energy-and latency-aware parallelization technique that combines both runnable-and tasklevel parallelism. Parcus explicitly models the traversal of data from sensor to actuator through task instances, enabling to consider the latency imposed by parallelization techniques. The parallel schedule quality (PSQ) metric quantifies the success of the parallelization, for which it takes the latency and the processor frequency into account. We demonstrate the applicability of Parcus with an automotive case study. The results show that Parcus can fully utilize the processor's energy-saving potential.
This research received funding from the EU FP7 no. 287519 (parMERASA), the ARTEMIS-JU no. 621429 (EMC2), and the German Federal Ministry of Education and Research.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria electrònica
Parallel processing (Electronic computers)
Automotive engineering
Multicore processing
Program processors
Parallel processing
Processament en paral·lel (Ordinadors)
Attribution-NonCommercial-NoDerivs 3.0 Spain
Institute of Electrical and Electronics Engineers (IEEE)

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