2026-08-16T01:11:22Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:17725 2024-03-06T10:31:54Z ddc:004 open_access

MonTM: Monitoring-Based Thermal Management for Mixed-Criticality Systems Mettler, Marcel Rapp, Martin Khdr, Heba Mueller-Gritschneder, Daniel Henkel, Jörg Schlichtmann, Ulf Dynamic thermal management mixed-criticality monitoring With a rapidly growing functionality of embedded real-time applications, it becomes inevitable to integrate tasks of different safety integrity levels on one many-core processor leading to a large-scale mixed-criticality system. In this process, it is not sufficient to only isolate shared architectural resources, as different tasks executing on different cores also possibly interfere via the many-core processor’s thermal management. This can possibly lead to best-effort tasks causing deadline violations for safety-critical tasks. In order to prevent such a scenario, we propose a monitoring-based hardware extension that communicates imminent thermal violations between cores via a lightweight interconnect. Building on this infrastructure, we propose a thermal strategy such that best-effort tasks can be throttled in favor of safety-critical tasks. Furthermore, assigning static voltage/frequency (V/f) levels to each safety-critical task based on their worst-case execution time may result in unnecessary high V/f levels when the actual execution finishes faster. To free the otherwise wasted thermal resources, our solution monitors the progress of safety-critical tasks to detect slack and safely reduce their V/f levels. This increases the thermal headroom for best-effort tasks, boosting their performance. In our evaluation, we demonstrate our approach on an 80-core processor to show that it satisfies the thermal and deadline requirements, and simultaneously reduces the run-time of best-effort tasks by up to 45% compared to the state of the art. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Marcel Mettler and Martin Rapp and Heba Khdr and Daniel Mueller-Gritschneder and Jörg Henkel and Ulf Schlichtmann 2023 Is Part Of OASIcs, Volume 107, 14th Workshop on Parallel Programming and Run-Time Management Techniques for Many-Core Architectures and 12th Workshop on Design Tools and Architectures for Multicore Embedded Computing Platforms (PARMA-DITAM 2023) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/OASIcs.PARMA-DITAM.2023.5 urn:nbn:de:0030-drops-177250 https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.PARMA-DITAM.2023.5 eng https://creativecommons.org/licenses/by/4.0/legalcode