ReCycle: Pipeline Adaptation to Tolerate Process Variation

Provided by: Association for Computing Machinery
Topic: Hardware
Format: PDF
Process variation affects processor pipelines by making some stages slower and others faster, therefore exacerbating pipeline unbalance. This reduces the frequency attainable by the pipeline. To improve performance, this paper proposes ReCycle, an architectural framework that comprehensively applies cycle time stealing to the pipeline - transferring the time slack of the faster stages to the slow ones by skewing clock arrival times to latching elements after fabrication. As a result, the pipeline can be clocked with a period close to the average stage delay rather than the longest one.

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