文章基本信息

标题：Software-enforced Interconnect Arbitration for COTS Multicores
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作者：Marco Ziccardi ; Alessandro Cornaglia ; Enrico Mezzetti 等
期刊名称：OASIcs : OpenAccess Series in Informatics
电子版ISSN：2190-6807
出版年度：2015
卷号：47
页码：11-20
DOI：10.4230/OASIcs.WCET.2015.11
出版社：Schloss Dagstuhl -- Leibniz-Zentrum fuer Informatik
摘要：The advent of multicore processors complicates timing analysis owing to the need to account for the interference between cores accessing shared resources, which is not always easy to characterize in a safe and tight way. Solutions have been proposed that take two distinct but complementary directions: on the one hand, complex analysis techniques have been developed to provide safe and tight bounds to contention; on the other hand, sophisticated arbitration policies (hardware or software) have been proposed to limit or control inter-core interference. In this paper we propose a software-based TDMA-like arbitration of accesses to a shared interconnect (e.g. a bus) that prevents inter-core interference. A more flexible arbitration scheme is also proposed to reserve more bandwidth to selected cores while still avoiding contention. A proof-of-concept implementation on an AURIX TC277TU processor shows that our approach can apply to COTS processors, thus not relying on dedicated hardware arbiters, while introducing little overhead.
关键词：Multicore; Resource Arbitration; Interference; Mixed-Criticality