Predictable Interrupt Management and Scheduling in the Composite Component-Based System

13 years 11 months ago

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This paper presents the design of user-level scheduling hierarchies in the Composite component-based system. The motivation for this is centered around the design of a system that is both dependable and predictable, and which is conﬁgurable to the needs of speciﬁc applications. Untrusted application developers can safely develop services and policies, that are isolated in protection domains outside the kernel. To ensure predictability, Composite needs to enforce timing control over user-space services. Moreover, it must provide a means by which asynchronous events, such as interrupts, are handled in a timely manner without jeopardizing the system. Towards this end, we describe the features of Composite that allow user-deﬁned scheduling policies to be composed for the purposes of combined interrupt and task management. A signiﬁcant challenge arises from the need to synchronize access to shared data structures (e.g., scheduling queues), without allowing untrusted code to disable...

Gabriel Parmer, Richard West

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