NDLI: Cache persistence analysis:a novel approachtheory and practice

Content Provider	ACM Digital Library
Author	Cullmann, Christoph
Abstract	To compute a worst-case execution time (WCET) estimate for a program, the architectural effects of the underlying hardware must be modeled. For modern processors this results in the need for a cache and pipeline analysis. The timing-relevant result of the cache analysis is the categorization of the accesses to cached memory. Categorizations that are obtainable by the well-known must and may cache analysis are always-hit, always-miss and not-classified. The cache persistence analysis tries to provide additional information for the not-classified case to limit the number of misses. There exists a cache persistence analysis by Ferdinand and Wilhelm based on abstract interpretation computing these classifications. In this paper, we present a correctness issue with this analysis and a novel analysis that fixes it. For fully timing compositional architectures the persistence information is straightforward to use. We will focus on the application of the persistence analysis for state-of-the-art architectures that show timing anomalies. Such architectures do not allow to quantify the costs of a single cache hit or miss in isolation. To make the usage of the persistence information feasible, we integrate the novel persistence analysis together with a novel path analysis approach into the industrially used WCET analyzer aiT.
Starting Page	121
Ending Page	130
Page Count	10
File Format	PDF
ISSN	03621340 15581160
DOI	10.1145/2016603.1967695
Journal	ACM SIGPLAN Notices (SIGP)
Volume Number	46
Issue Number	5
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1983-05-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Persistence Wcet Cache
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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