Sparse Approximate Multifrontal Factorization with Composite Compression Methods
Sparse Approximate Multifrontal Factorization with Composite Compression Methods
复制标题
复合压缩方法的稀疏近似多锋分解
DOI:
10.1145/3611662
复制
发表时间:
2023
影响因子:
2.7
通讯作者:
Li, Sherry
中科院分区:
文献类型:
--
作者:
Claus, Lisa;Ghysels, Pieter;Liu, Yang;Nhan, Thái Anh;Thirumalaisamy, Ramakrishnan;Bhalla, Amneet Pal;Li, Sherry
This article presents a fast and approximate multifrontal solver for large sparse linear systems. In a recent work by Liu et al., we showed the efficiency of a multifrontal solver leveraging the butterfly algorithm and its hierarchical matrix extension, HODBF (hierarchical off-diagonal butterfly) compression to compress large frontal matrices. The resulting multifrontal solver can attain quasi-linear computation and memory complexity when applied to sparse linear systems arising from spatial discretization of high-frequency wave equations. To further reduce the overall number of operations and especially the factorization memory usage to scale to larger problem sizes, in this article we develop a composite multifrontal solver that employs the HODBF format for large-sized fronts, a reduced-memory version of the nonhierarchical block low-rank format for medium-sized fronts, and a lossy compression format for small-sized fronts. This allows us to solve sparse linear systems of dimension up to 2.7 × larger than before and leads to a memory consumption that is reduced by 70% while ensuring the same execution time. The code is made publicly available in GitHub.
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影响因子:
2.1
作者:
N. Higham;Théo Mary
通讯作者:
Théo Mary
DOI:
10.1137/120903476
发表时间:
2015-06
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
P. Amestoy;C. Ashcraft;O. Boiteau;A. Buttari;J. L’Excellent;Clément Weisbecker
通讯作者:
P. Amestoy;C. Ashcraft;O. Boiteau;A. Buttari;J. L’Excellent;Clément Weisbecker
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
M. Overton
通讯作者:
M. Overton
DOI:
--
发表时间:
2019
期刊:
arXiv.org
影响因子:
--
作者:
R. Nies;M. Hoelzl
通讯作者:
M. Hoelzl
影响因子:
3.1
作者:
Azad, Ariful;Buluc, Aydin;Langguth, Johannes
通讯作者:
Langguth, Johannes