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Sensor-Based Time Speculation in the Presence of Timing Variability.
- Source :
-
IEEE Transactions on Computer-Aided Design of Integrated Circuits & Systems . Jun2018, Vol. 37 Issue 6, p1133-1142. 10p. - Publication Year :
- 2018
-
Abstract
- Time speculation has been widely used to achieve high performance in modern design as it exploits average-case timing optimization instead of worst-case timing optimization focusing on reducing longest path delay which rarely happens. Variable-latency design (VLD) style is one research category of time speculation. Since process and environmental variations are hard to predict, traditional variable-latency units (VLUs) designed at presilicon stage will suffer significant performance loss due to pessimistic assumptions for addressing variations. In this paper, we propose a novel sensor-based, transition-aware VLU (S-VLU) scheme adapting to process-voltage-temperature (PVT) variations by using in situ sensors to obtain real-time transition information in a circuit. Moreover, we also propose a sensor deployment strategy to achieve near-maximal performance gain. On average, the S-VLU achieves a 31.27% performance improvement as compared to a 19.26% improvement by using traditional HL. The area overhead of the S-VLU is 13.48%. To the best of the authors’ knowledge, this is the first wok to address PVT variations in VLD style. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 02780070
- Volume :
- 37
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Computer-Aided Design of Integrated Circuits & Systems
- Publication Type :
- Academic Journal
- Accession number :
- 129761826
- Full Text :
- https://doi.org/10.1109/TCAD.2017.2748028