Sciweavers

Share
MICRO
2009
IEEE

Improving cache lifetime reliability at ultra-low voltages

9 years 6 months ago
Improving cache lifetime reliability at ultra-low voltages
Voltage scaling is one of the most effective mechanisms to reduce microprocessor power consumption. However, the increased severity of manufacturing-induced parameter variations at lower voltages limits voltage scaling to a minimum voltage, Vccmin, below which a processor cannot operate reliably. Memory cell failures in large memory structures (e.g., caches) typically determine the Vccmin for the whole processor. Memory failures can be persistent (i.e., failures at time zero which cause yield loss) or non-persistent (e.g., soft errors or erratic bit failures). Both types of failures increase as supply voltage decreases and both need to be addressed to achieve reliable operation at low voltages. In this paper, we propose a novel adaptive technique to improve cache lifetime reliability and enable low voltage operation. This technique, multi-bit segmented ECC (MS-ECC) addresses both persistent and non-persistent failures. Like previous work on mitigating persistent failures, MS-ECC trade...
Zeshan Chishti, Alaa R. Alameldeen, Chris Wilkerso
Added 24 May 2010
Updated 24 May 2010
Type Conference
Year 2009
Where MICRO
Authors Zeshan Chishti, Alaa R. Alameldeen, Chris Wilkerson, Wei Wu, Shih-Lien Lu
Comments (0)
books