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TEI-NoC: Optimizing Ultralow Power NoCs Exploiting the Temperature Effect Inversion
- Source :
- IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems. 37:458-471
- Publication Year :
- 2018
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2018.
-
Abstract
- The era of the Internet of Things (IoT) is upon us. In this era, minimizing power consumption becomes a primary concern of system-on-chip designers. Ultralow power (ULP) very large-scale integration circuits have been receiving considerable interest from both academia and industry as the best-suited techniques for IoT devices, which can take full advantage of power-saving that voltage scaling potentially achieves. Consequently, research on ULP designs has begun to yield tangible outcomes, namely ULP circuits. However, little attention has been paid to ULP network-on-chip (NoC), although the NoC is an essential of the ULP chips, and its power consumption accounts for a significant portion of the total power. This paper focuses on ULP NoCs, and presents a new power management method that exploits delay versus temperature characteristics of ULP circuits. Recent studies on ULP circuits show that delay versus temperature characteristics are fundamentally different from normal circuits, i.e., the delay of the ULP circuits implemented in state-of-the-art bulk CMOS operating at low supply voltages or in FinFET technologies decreases with increasing temperature, a phenomenon known as the temperature effect inversion (TEI). Starting with an intuition that at a certain temperature point, power savings without performance penalty can be achieved by increasing the router frequency to create the opportunity to turn off some routers in ULP NoCs, or by decreasing the NoC supply voltage level, an optimization method is presented to maximize the power savings with minor performance penalty. To validate the proposed method, a concrete ULP NoC simulator, TEI-Noxim, has been developed. Experimental results demonstrate that TEI-aware NoC achieves an average of 36.0% power reduction over 21 applications.
- Subjects :
- Power management
Router
Engineering
business.industry
020208 electrical & electronic engineering
Electrical engineering
Inversion (meteorology)
Hardware_PERFORMANCEANDRELIABILITY
02 engineering and technology
Computer Graphics and Computer-Aided Design
020202 computer hardware & architecture
CMOS
Logic gate
Hardware_INTEGRATEDCIRCUITS
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
System on a chip
Electrical and Electronic Engineering
business
Software
Voltage
Electronic circuit
Subjects
Details
- ISSN :
- 19374151 and 02780070
- Volume :
- 37
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
- Accession number :
- edsair.doi...........db00226616c86da59f9daab57a23d4d5