SimTag: Exploiting Tag Bits Similarity to Improve the Reliability of the Data Caches

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Provided by: edaa
Topic: Storage
Format: PDF
Though tag bits in the data caches are vulnerable to transient errors, few efforts have been made to reduce their vulnerability. In this paper, the authors propose to exploit prevalent same tag bits to improve error protection capability of the tag bits in the data caches. When data are fetched from the main memory, it is checked if adjacent cache lines have the same tag bits as those of the data fetched. This similarity information is stored in the data caches as extra bits to be used later.
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