Trading Between Intra- and Inter-Task Cache Interference to Improve Schedulability
Syed Aftab Rashid, Geoffrey Nelissen, Eduardo Tovar · 2018
Caches help reduce the average execution time of tasks due to their fast operational speeds. However, caches may also severely degrade the timing predictability of the system due to intra- and inter-task cache interference. Intra-task cache interference occurs if the memory footprint of a task is larger than the allocated cache space or when two memory entries of that task are mapped to the same space in cache. Inter-task cache interference occurs when memory entries of two or more distinct tasks use the same cache space. State-of-the-art analysis focusing on bounding cache interference or reducing it by means of partitioning and by optimizing task layout in memory either focus on intra- or inter-task cache interference and do not exploit the fact that both intra- and inter-task cache interference can be interrelated.