Speedpath Analysis Based on Hypothesis Pruning and Ranking

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Provided by: Association for Computing Machinery
Topic: Hardware
Format: PDF
In optimizing high-performance designs, speed limiting paths (speedpaths) impact the performance and power trade-off. Timing tools attempt to model and capture all such paths on a chip. Due to the high performance nature of these designs, critical paths predicted by the timing tools often do not match the actual speedpaths found on silicon chips. Early silicon data therefore is used to identify the speedpaths, and further performance optimization is carried out by pushing the delays on these paths. In this paper, the authors present a novel data mining approach that analyzes a small number of identified speedpaths against a large number of non-speedpaths. The result of this analysis for each speedpath is a set of hypotheses explaining why the path is special.
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