E < MC2: Less energy through multi-copy cache

Arup Chakraborty, Houman Homayoun, Amin Khajeh, Nikil Dutt, Ahmed Eltawil, Fadi Kurdahi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

28 Scopus citations


Caches are known to consume a large part of total microprocessor power. Traditionally, voltage scaling has been used to reduce both dynamic and leakage power in caches. However, aggressive voltage reduction causes process-variation-induced failures in cache SRAM arrays, which compromise cache reliability. We present Multi-Copy Cache (MC2), a new cache architecture that achieves significant reduction in energy consumption through aggressive voltage scaling, while maintaining high error resilience (reliability) by exploiting multiple copies of each data item in the cache. Unlike many previous approaches, MC2 does not require any error map characterization and therefore is responsive to changing operating conditions (e.g., Vdd-noise, temperature and leakage) of the cache. MC2 also incurs significantly lower overheads compared to other ECC-based caches. Our experimental results on embedded benchmarks demonstrate that MC2 achieves up to 60% reduction in energy and energy-delay product (EDP) with only 3.5% reduction in IPC and no appreciable area overhead.
Original languageEnglish (US)
Title of host publicationEmbedded Systems Week 2010 - Proceedings of the 2010 International Conference on Compilers, Architecture and Synthesis for Embedded Systems, CASES'10
StatePublished - Dec 1 2010
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2019-11-20


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