OWARU: free space-aware timing-driven incremental placement with critical path smoothing

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This paper presents an incremental timing-driven placement tool, named OWARU. It optimizes timing critical paths through a free space-aware path smoothing: the gates on such paths are relocated to free spaces around the smoothed paths, while incremental static timing analysis is involved to accurately assess timing changes due to the relocation. OWARU is extended to accommodate gate sizing and layer assignment to demonstrate the effectiveness of unified physical synthesis optimizations and incremental placement. The goal is to show that OWARU is an ideal platform for timing closure at later stages of a physical design flow. OWARU is applied on a set of test circuits from 14-nm high-performance commercial microprocessors, which originally failed in timing closure. On average, the worst slack is improved by 63.6%, which corresponds to 5.0% of the clock period; total negative slack is improved by 69.1%.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2018-09
Language
English
Article Type
Article
Keywords

OPTIMIZATION; CLOSURE

Citation

IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, v.37, no.9, pp.1825 - 1838

ISSN
0278-0070
DOI
10.1109/TCAD.2017.2774277
URI
http://hdl.handle.net/10203/245664
Appears in Collection
EE-Journal Papers(저널논문)
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