Golchin, AhmadSinha, SohamWest, Richard2021-09-212021-09-212020-04-21Ahmad Golchin, Soham Sinha, Richard West. 2020. "Boomerang: Real-Time I/O Meets Legacy Systems." Proceedings of the IEEE Real-Time and Embedded Technology and Applications Symposium, RTAS. RTAS. Sydney, Australia, https://doi.org/10.1109/RTAS48715.2020.000131545-3421https://hdl.handle.net/2144/43045This paper presents Boomerang, an I/O system that integrates a legacy non-real-time OS with one that is customized for timing-sensitive tasks. A relatively small RTOS benefits from the pre-existing libraries, drivers and services of the legacy system. Additionally, timing-critical tasks are isolated from less critical tasks by securely partitioning machine resources among the separate OSes. Boomerang guarantees end-to-end processing delays on input data that requires outputs to be generated within specific time bounds.We show how to construct composable task pipelines in Boomerang that combine functionality spanning a custom RTOS and a legacy Linux system. By dedicating time-critical I/O to the RTOS, we ensure that complementary services provided by Linux are sufficiently predictable to meet end-to-end service guarantees. While Boomerang benefits from spatial isolation, it also outperforms a standalone Linux system using deadline-based CPU reservations for pipeline tasks. We also show how Boomerang outperforms a virtualized system called ACRN, designed for automotive systems.en-USConference materials10.1109/RTAS48715.2020.00013615768