Boomerang: Real-Time I/O Meets Legacy Systems


== Abstract ==

This 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.

Comment: This paper is now accepted for publication in Proceedings of the 26th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS), Sydney, Australia, April 21-24, 2020


== Original document ==

The different versions of the original document can be found in:

* [http://arxiv.org/abs/1908.06807 http://arxiv.org/abs/1908.06807]

* [http://arxiv.org/pdf/1908.06807 http://arxiv.org/pdf/1908.06807]

* [http://xplorestaging.ieee.org/ielx7/9108343/9113088/09113119.pdf?arnumber=9113119 http://xplorestaging.ieee.org/ielx7/9108343/9113088/09113119.pdf?arnumber=9113119],
: [http://dx.doi.org/10.1109/rtas48715.2020.00013 http://dx.doi.org/10.1109/rtas48715.2020.00013]

* [https://dblp.uni-trier.de/db/journals/corr/corr1908.html#abs-1908-06807 https://dblp.uni-trier.de/db/journals/corr/corr1908.html#abs-1908-06807],
: [https://ieeexplore.ieee.org/document/9113119 https://ieeexplore.ieee.org/document/9113119],
: [https://academic.microsoft.com/#/detail/3034226467 https://academic.microsoft.com/#/detail/3034226467]