Processors Investigate

Enabling Ultra Low Voltage System Operation by Tolerating On-Chip Cache Failures

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Executive Summary

Extreme technology integration in the sub-micron regime comes with a rapid rise in heat dissipation and power density for modern processors. Dynamic voltage scaling is a widely used technique to tackle this problem when high performance is not needed. However, the minimum achievable supply voltage is often bounded by SRAMcells since they fail at a faster rate than logic cells. In this paper, the authors propose a novel fault-tolerant cache architecture, that by reconfiguring its internal organization can efficiently tolerate SRAM failures that arise when operating in the ultra low voltage region.

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