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arXiv · 2203.12831

LHNN: Lattice Hypergraph Neural Network for VLSI Congestion Prediction

Bowen Wang·Guibao Shen·Dong Li·Jianye Hao·Wulong Liu·Yu Huang·Hongzhong Wu·Yibo Lin·Guangyong Chen·Pheng Ann Heng
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Abstract

Precise congestion prediction from a placement solution plays a crucial role in circuit placement. This work proposes the lattice hypergraph (LH-graph), a novel graph formulation for circuits, which preserves netlist data during the whole learning process, and enables the congestion information propagated geometrically and topologically. Based on the formulation, we further developed a heterogeneous graph neural network architecture LHNN, jointing the routing demand regression to support the congestion spot classification. LHNN constantly achieves more than 35% improvements compared with U-nets and Pix2Pix on the F1 score. We expect our work shall highlight essential procedures using machine learning for congestion prediction.

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Bowen Wang, Guibao Shen, Dong Li, Jianye Hao, Wulong Liu, Yu Huang, Hongzhong Wu, Yibo Lin, Guangyong Chen, Pheng Ann Heng. 2022-03-24. LHNN: Lattice Hypergraph Neural Network for VLSI Congestion Prediction. https://arxiv.org/abs/2203.12831

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