2026-04-17T04:16:05Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1336562026-02-07T06:53:31Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Cardona, Jordi author Hernandez, Carles author Abella Ferrer, Jaume author Cazorla, Francisco J. author 2019-04-16 In real-time systems, the techniques to derive bounds to the contention tasks can suffer in multicore build on resource quota monitoring and enforcement. Existing techniques track and bound the number of requests to hardware shared resources that each core (task) is allowed to perform. In this paper we show that current software-only solutions work well when there is a single resource and type of request to track and bound, but do not scale to the more general case of several shared resources that accept different request types, each with a different associated latency. To handle this (more general) case, we propose low-overhead hardware support called Maximum-Contention Control Unit (MCCU). The MCCU performs fine-grain tracking of different types of requests, preventing a core to cause more interference on its contenders than budgeted. In this process, the MCCU also helps verifying that individual requests duration does not exceed their theoretical bounds, hence dealing with scenarios in which requests can have an arbitrarily large duration. This work has been partially supported by the Spanish Ministry of Economy and Competitiveness (MINECO) under grant TIN2015-65316-P, the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 772773) and the HiPEAC Network of Excellence. Carles Hernández is jointly funded by the MINECO and FEDER funds through grant TIN2014-60404-JIN. Jaume Abella has been partially supported by the MINECO under Ramon y Cajal postdoctoral fellowship number RYC-2013-14717. Peer Reviewed Postprint (author's final draft) Àrees temàtiques de la UPC::Informàtica High performance computing Task analysis Multicore processing Hardware Monitoring Program processors Timing Aerospace electronics Supercomputadors Maximum-Contention Control Unit (MCCU): Resource Access Count and Contention Time Enforcement