LITES-v002-i001-a001.pdf
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Randomized Caches Can Be Pretty Useful to Hard Real-Time Systems
Authors
Tullio Vardanega 
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Part of:
Issue:
LITES, Volume 2, Issue 1
Volume: LITES, Volume 2
Journal: Leibniz Transactions on Embedded Systems (LITES) - License:
Creative Commons Attribution 3.0 Germany license
- Publication Date: 2015-03-23
Cite As Get BibTex
Enrico Mezzetti, Marco Ziccardi, Tullio Vardanega, Jaume Abella, Eduardo Quiñones, and Francisco J. Cazorla. Randomized Caches Can Be Pretty Useful to Hard Real-Time Systems. In LITES, Volume 2, Issue 1 (2015). Leibniz Transactions on Embedded Systems, Volume 2, Issue 1, pp. 01:1-01:10, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)
https://doi.org/10.4230/LITES-v002-i001-a001
Abstract
Cache randomization per se, and its viability for probabilistic timing analysis (PTA) of critical real-time systems, are receiving increasingly close attention from the scientific community and the industrial practitioners. In fact, the very notion of introducing randomness and probabilities in time-critical systems has caused strenuous debates owing to the apparent clash that this idea has with the strictly deterministic view traditionally held for those systems. A paper recently appeared in LITES (Reineke, J. (2014). Randomized Caches Considered Harmful in Hard Real-Time Systems. LITES, 1(1), 03:1-03:13.) provides a critical analysis of the weaknesses and risks entailed in using randomized caches in hard real-time systems. In order to provide the interested reader with a fuller, balanced appreciation of the subject matter, a critical analysis of the benefits brought about by that innovation should be provided also. This short paper addresses that need by revisiting the array of issues addressed in the cited work, in the light of the latest advances to the relevant state of the art. Accordingly, we show that the potential benefits of randomized caches do offset their limitations, causing them to be - when used in conjunction with PTA - a serious competitor to conventional designs.
Subject Classification
ACM Subject Classification
- Computer systems organization → Real-time system architecture
- Theory of computation → Probabilistic computation
- Computer systems organization → Special purpose systems
Keywords
- Real-time systems
- Probabilistic WCET
- Randomized caches
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References
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