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Full-Text Articles in Physical Sciences and Mathematics
Cache-Aware Compositional Analysis Of Real-Time Multicore Virtualization Platforms, Meng Xu, Linh T.X. Phan, Insup Lee, Oleg Sokolsky, Sisu Xi, Chenyang Lu, Christopher Gill
Cache-Aware Compositional Analysis Of Real-Time Multicore Virtualization Platforms, Meng Xu, Linh T.X. Phan, Insup Lee, Oleg Sokolsky, Sisu Xi, Chenyang Lu, Christopher Gill
Oleg Sokolsky
Multicore processors are becoming ubiquitous, and it is becoming increasingly common to run multiple real-time systems on a shared multicore platform. While this trend helps to reduce cost and to increase performance, it also makes it more challenging to achieve timing guarantees and functional isolation. One approach to achieving functional isolation is to use virtualization. However, virtualization also introduces many challenges to the multicore timing analysis; for instance, the overhead due to cache misses becomes harder to predict, since it depends not only on the direct interference between tasks but also on the indirect interference between virtual processors and the …
Compositional Analysis Of Real-Time Embedded Systems, Linh T.X. Phan, Insup Lee, Oleg Sokolsky
Compositional Analysis Of Real-Time Embedded Systems, Linh T.X. Phan, Insup Lee, Oleg Sokolsky
Oleg Sokolsky
This tutorial is concerned with various aspects of component-based design and compositional analysis of real-time embedded systems. It will first give an overview of component-based frameworks and their underlying principles. It will then go in-depth into abstraction methods for real-time components and techniques for computing their optimal interfaces, for both systems implemented on uniprocessor and multiprocessor platforms, as well as extensions to multi-mode systems. Besides theoretical aspects, the tutorial will also present an implementation of the compositional analysis framework on Xen virtualization and a demonstration of the CARTS toolset with several examples seeing the techniques in action. It will also …
Compositional Analysis Of Multi-Mode Systems, Linh T.X. Phan, Insup Lee, Oleg Sokolsky
Compositional Analysis Of Multi-Mode Systems, Linh T.X. Phan, Insup Lee, Oleg Sokolsky
Oleg Sokolsky
The paper presents a model for multi-mode realtime applications and develops new techniques for the compositional analysis of systems that contain multiple such applications. An algorithm for constructing an interface for a single multimode application is presented. Then, a method for computing an interface of a composite application is presented, which uses only the interfaces of constituent applications. A case study of an adaptive streaming system demonstrates that multi-mode analysis offers more precise results compared to a unimodal worst-case analysis.