Abstract
Priority-based wormhole switching with a priority share policy has been proposed as a possible solution for real-time on-chip communication. However, the blocking introduced by priority share complicates the analysis process. In this paper, we propose a new “per-priority” basis analysis scheme which computes the total time window at each priority level instead of each traffic-flow. By checking the release instance of each flow at the corresponding priority window, we can determine schedulability efficiently. Building on this static analysis, for a given set of tasks and network topology, we further propose a task mapping and priority assignment algorithm, in such a way that the hard time bounds are met with a reduced hardware overhead. Experiment results show that significant resource saving can be achieved with no performance degradation in terms of missed deadlines. By using this approach, a broad class of real-time communications with different QoS requirements can be explored and developed in a SoC/NoC communication platform.
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This paper is an extended version of the paper presented at RTNS 2009 (Shi and Burns 2009b).
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Shi, Z., Burns, A. Schedulability analysis and task mapping for real-time on-chip communication. Real-Time Syst 46, 360–385 (2010). https://doi.org/10.1007/s11241-010-9108-3
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DOI: https://doi.org/10.1007/s11241-010-9108-3