An Architecture for Declarative Real-Time Scheduling on Linux

Abstract

This paper proposes a novel framework and programming model for real-time applications supporting a declarative access to real-time CPU scheduling features that are available on an operating system. The core idea is to let applications declare their temporal characteristics and/or requirements on the CPU allocation, where, for example, some of them may require real-time POSIX priorities, whilst others might need resource reservations through SCHED_DEADLINE. The framework can properly handle such a set of heterogeneous requirements configuring an underlying multi-core platform so to exploit the various scheduling disciplines that are available in the kernel, matching applications requirements. The framework is realized as a modular architecture in which different plugins handle independently certain real-time scheduling features within the underlying kernel, easing the customization of its behavior to support other schedulers or operating systems by adding further plugins.

Yasmin

“…Serra et al [34] propose a complete middleware framework to enhance user experience regarding scheduling strategies from the Linux user space. From the user point of view, it facilitates the setup of existing scheduling strategies by hiding required invocations to syscalls (pthread_* API) that configure the environment.…”