Placement Initialization via Sequential Subspace Optimization with Sphere Constraints
Placement Initialization via Sequential Subspace Optimization with Sphere Constraints
复制标题
通过具有球体约束的顺序子空间优化进行布局初始化
DOI:
10.1145/3569052.3571877
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Wang, Yucheng
中科院分区:
文献类型:
--
作者:
Chen, Pengwen;Cheng, Chung-Kuan;Chern, Albert;Holtz, Chester;Li, Aoxi;Wang, Yucheng
State-of-the-art analytical placement algorithms for VLSI designs rely on solving nonlinear programs to minimize wirelength and cell congestion. As a consequence, the quality of solutions produced using these algorithms crucially depends on the initial cell coordinates. In this work, we reduce the problem of finding wirelength-minimal initial layouts subject to density and fixed-macro constraints to a Quadratically Constrained Quadratic Program (QCQP). We additionally propose an efficient sequential quadratic programming algorithm to recover a block-globally optimal solution and a subspace method to reduce the complexity of problem. We extend our formulation to facilitate direct minimization of the Half-Perimeter Wirelength (HPWL) by showing that a corresponding solution can be derived by solving a sequence of reweighted quadratic programs. Critically, our method is parameter-free, i.e. involves no hyperparameters to tune. We demonstrate that incorporating initial layouts produced by our algorithm with a global analytical placer results in improvements of up to 4.76% in post-detailed-placement wirelength on the ISPD'05 benchmark suite. Our code is available on github. https://github.com/choltz95/laplacian-eigenmaps-revisited.
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DOI:
--
发表时间:
2022
期刊:
Design Automation Conference
影响因子:
--
作者:
Pengwen Chen;Chung;Albert Chern;Chester Holtz;Aoxi Li;Yucheng Wang
通讯作者:
Yucheng Wang
DOI:
--
发表时间:
1996
期刊:
1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96
影响因子:
--
作者:
C. Alpert;A. Kahng
通讯作者:
A. Kahng
DOI:
--
发表时间:
2019
期刊:
Proceedings of Machine Learning Research
影响因子:
--
作者:
Ene, Alina;Vladu, Adrian
通讯作者:
Vladu, Adrian
影响因子:
1.2
作者:
Candes, Emmanuel J.;Wakin, Michael B.;Boyd, Stephen P.
通讯作者:
Boyd, Stephen P.