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Managing contention of software transactional memory in real-time systems

机译:在实时系统中管理软件事务存储器的争用

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摘要

The foreseen evolution of chip architectures tohigher number of, heterogeneous, cores, with non-uniformmemory and non-coherent caches, brings renewed attentionto the use of Software Transactional Memory (STM) asan alternative to lock-based synchronisation. However, STMrelies on the possibility of aborting conflicting transactions tomaintain data consistency, which impacts on the responsivenessand timing guarantees required by real-time systems. In thesesystems, contention delays must be (efficiently) limited so thatthe response times of tasks executing transactions are upperboundedand task sets can be feasibly scheduled. In this paperwe defend the role of the transaction contention managerto reduce the number of transaction retries and to help thereal-time scheduler assuring schedulability. For such purpose,the contention management policy should be aware of on-linescheduling information.
机译:可以预见的是,芯片体系结构将向具有不统一的内存和非一致性高速缓存的大量异构内核提供新的关注,使人们重新关注使用软件事务存储(STM)作为基于锁的同步的替代方法。但是,STM依赖中止冲突事务以保持数据一致性的可能性,这会影响实时系统所需的响应能力和时序保证。在这些系统中,必须(有效地)限制竞争延迟,以使执行事务的任务的响应时间上限,并且可以合理地安排任务集。在本文中,我们捍卫了事务争用管理器的作用,以减少事务重试的次数并帮助实时调度程序确保可调度性。为此,竞争管理策略应了解在线调度信息。

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