Document Type

Article

Journal/Book Title/Conference

IEEE Transactions on Very Large Scale Integration (VLSI) Systems

Volume

26

Issue

11

Publisher

Institute of Electrical and Electronics Engineers

Publication Date

11-1-2018

Funder

National Science Foundation

First Page

2195

Last Page

2204

Abstract

Near threshold computing (NTC) systems have been inherently plagued with heightened process variation (PV) sensitivity. Choke points are an intriguing manifestation of this PV sensitivity. In this paper, we explore the probability of minimum timing violations, caused by choke points, in an NTC system, and their nontrivial impacts on the system reliability. We show that conventional timing error mitigation techniques are inefficient in tackling choke point-induced minimum timing violations. Consequently, we propose a comprehensive error mitigation technique, Trident, to tackle choke points at NTC. Trident offers a 1.37 × performance improvement and a 1.11 × energy-efficiency gain over Razor at NTC with minimal hardware and power overheads.

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