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Author Kim, Jaeyoon ♦ Tiwari, Sandip
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Copyright Year ©2014
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Energy-efficiency ♦ MSB-LSB weighted supply voltage scaling ♦ Monte Carlo simulations ♦ Probability of calculation error ♦ Reliability ♦ Statistical performance metric ♦ Variations
Abstract Numerous computing applications can tolerate low error rates. In such applications, inexact approaches provide the ability to achieve significantly lower power. This work demonstrates the power-error trade-offs that can be achieved. Using probabilistic modeling in sub-50-nm silicon transistor technology, the relationship between statistical uncertainties and errors are elucidated for different configurations and topologies and the trade-offs quantified. Gate-level implementation of the probabilistic CMOS logic is validated by circuit simulations of a commercial 45-nm SOI CMOS process technology. Using a practical ALU architecture where voltages can be scaled from most significant to least significant bit blocks as an example, the potential benefits of this technique are shown. A calculation error of $10^{™6},$ an error rate quite tolerable for many computational tasks, is shown to be possible with a total power reduction of more than 40%.
ISSN 15504832
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2014-03-06
Publisher Place New York
e-ISSN 15504840
Journal ACM Journal on Emerging Technologies in Computing Systems (JETC)
Volume Number 10
Issue Number 2
Page Count 23
Starting Page 1
Ending Page 23

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Source: ACM Digital Library