Papers by Mohamed Cabdi Hassan
ACM Transactions on Embedded Computing Systems
Tasks in modern embedded systems such as automotive and avionics communicate among each other usi... more Tasks in modern embedded systems such as automotive and avionics communicate among each other using shared data towards achieving the desired functionality of the whole system. In commodity platforms, cores communicate data through the shared memory hierarchy and correctness is maintained by a cache coherence protocol. Recent works investigated the deployment of coherence protocols in real-time systems and showed significant performance improvements. Nonetheless, we find these works to require modifications to commodity coherence protocols, assume simple in-order pipelines, and most importantly suffer from significant latency delays due to coherence interference along with average performance degradation. In this work, we propose PISCOT : a predictable and coherent bus architecture that (i) provides a considerably tighter bound compared to the state-of-the-art predictable coherent solutions (4× tighter bounds in a quad-core system). (ii) It does so with a negligible performance loss...
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Papers by Mohamed Cabdi Hassan