Work in Progress: Predictable Execution of Isolated Real-Time Tasks on Multicore Systems Using the LET Paradigm

An ongoing trend in the domain of embedded computing systems is the consolidation of functionality on few, high-performance platforms. This development also impacts real-time systems, where a shift to parallel architectures enables meeting the increased throughput demands. On these multicore platforms, memory contention is a central concern regarding time-predictability. Additionally, isolation between tasks is required to limit the impact of faults during run time. We propose a scratchpad memory-based approach to predictable execution that integrates runtime-based isolation mechanisms with an LET-based task model. In order to mitigate interference between cores, each core executes from a local memory, while the data transfers between the local memories and the shared main memory are incorporated into a global, static schedule. Our task execution model is based on the Logical Execution Time (LET) paradigm, which we extend to include explicitly scheduled data transfers similar to the Predictable Execution Model (PREM). The implementation and evaluation of our approach is ongoing and will be evaluated on a custom RISe- 'v, based multicore platform. This novel approach allows for consolidating hard real-time tasks with high demands for functional safety onto a single platform.