Analyse pire cas pour processeur multi-cœurs disposant de caches partagés

Hard real-time systems are subject to timing constraints and failure to respectthem can cause economic, ecological or human disasters. The validation processwhich guarantees the safety of such software, by ensuring the respect of theseconstraints in all situations including the worst case, is based on the knowledgeof the worst case execution time of each task. However, determining the worst caseexecution time is a difficult problem for modern architectures because of complexhardware mechanisms that could cause significant execution time variability.This document focuses on the analysis of the worst case timing behavior ofcache hierarchies, to determine their contribution to the worst case executiontime. Several approaches are proposed to predict and improve the worst caseexecution time of tasks running on multicore processors with a cache hierarchyin which some cache levels are shared between cores.