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DOI 10.5286/raltr.2016017
Persistent URL http://purl.org/net/epubs/work/30692911
Record Status Checked
Record Id 30692911
Title A new sparse LDLT solver using A Posteriori Threshold Pivoting
Contributors
Abstract We describe version 2.0 of the SPRAL Sparse Symmetric Indefinite Direct Solver (SSIDS). Version 1 performed the factorization only on a single GPU. The new version adds support for CPU and hybrid execution, capable of utilising multiple GPUs. Notably, the CPU algorithm uses OpenMP 4.0 tasks to implement a multifrontal algorithm with dense factorizations using a posteriori threshold pivoting based on the same threshold technique as traditional threshold partial pivoting.
Organisation STFC , SCI-COMP , SCI-COMP-CM
Keywords indefinite systems , a posteriori pivoting , sparse symmetric factorization , OpenMP
Funding Information EU, EU Horizon 2020 Research and Innovation Programme (NLAFET) (671633)
Related Research Object(s): 46753068
Licence Information: Creative Commons Attribution 3.0 Unported (CC BY 3.0)
Language English (EN)
Type Details URI(s) Local file(s) Year
Report RAL Technical Reports RAL-TR-2016-017. 2016. RAL-TR-2016-017.pdf 2016