An ultra low power SIMD processor for wireless devices

Mark Woh, Sangwon Seo, Chaitali Chakrabarti, Scott Mahlke, Trevor Mudge

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

Abstract

This paper presents an ultra low power programmable processor architecture for wireless devices that support 4G wireless communications and video decoding. To derive such an architecture, first we analyzed the kernel algorithms that constitute these applications. The characteristics of these algorithms helped define the wide-SIMD architecture, where the SIMD width can be configured at run time to the specifics of the algorithm being executed. For ultra low power operation, we advocate operating the processor at near threshold voltage. While a combination of near-threshold circuit techniques and parallel SIMD computations achieves excellent energy efficiency, near-threshold operations suffer from large delay variations due to increased process variability. The paper explores low overhead architectural techniques to tolerate and mitigate problems due to delay variations. The techniques include replication of SIMD functional units to replace faulty ones and use of an XRAM crossbar to efficiently set up the new error-free SIMD datapath.

Original languageEnglish (US)
Title of host publicationConference Record of the 44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
Pages390-394
Number of pages5
DOIs
StatePublished - Dec 1 2010
Event44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010 - Pacific Grove, CA, United States
Duration: Nov 7 2010Nov 10 2010

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
ISSN (Print)1058-6393

Other

Other44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010
CountryUnited States
CityPacific Grove, CA
Period11/7/1011/10/10

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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  • Cite this

    Woh, M., Seo, S., Chakrabarti, C., Mahlke, S., & Mudge, T. (2010). An ultra low power SIMD processor for wireless devices. In Conference Record of the 44th Asilomar Conference on Signals, Systems and Computers, Asilomar 2010 (pp. 390-394). [5757542] (Conference Record - Asilomar Conference on Signals, Systems and Computers). https://doi.org/10.1109/ACSSC.2010.5757542