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Light-Weight On-Chip Monitoring Network for Dynamic Adaptation and Calibration

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4 Author(s)
Ituero, P. ; Dept. of Electron. Eng., Univ. Politec. de Madrid, Madrid, Spain ; Lopez-Vallejo, M. ; Marcos, M.A.S. ; Osuna, C.G.

Current nanometer technologies suffer within-die parameter uncertainties, varying workload conditions, aging, and temperature effects that cause a serious reduction on yield and performance. In this scenario, monitoring, calibration, and dynamic adaptation become essential, demanding systems with a collection of multi purpose monitors and exposing the need for light-weight monitoring networks. This paper presents a new monitoring network paradigm able to perform an early prioritization of the information. This is achieved by the introduction of a new hierarchy level, the threshing level. Targeting it, we propose a time-domain signaling scheme over a single-wire that minimizes the network switching activity as well as the routing requirements. To validate our approach, we make a thorough analysis of the architectural trade-offs and expose two complete monitoring systems that suppose an area improvement of 40% and a power reduction of three orders of magnitude compared to previous works.

Published in:

Sensors Journal, IEEE  (Volume:12 ,  Issue: 6 )