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Spliss: A Sparse Linear System Solver for Transparent Integration of Emerging HPC Technologies into CFD Solvers

Rempke, Arne and Krzikalla, Olaf and Mohnke, Jasmin and Wendler, Johannes and Wagner, Michael and Gerhold, Thomas (2023) Spliss: A Sparse Linear System Solver for Transparent Integration of Emerging HPC Technologies into CFD Solvers. Computational and Data Science Seminar, Jülich, Deutschland.

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Abstract

We introduce Spliss, a block sparse linear solver library, which is designed to meet current and upcoming challenges in the CFD development. The C++ template interface of Spliss supports a wide range of linear operators typically used in CFD applications. This includes sparse block matrices of fixed or variable block sizes, different scalar types and matrix-free operators. We explain the technical design of Spliss, by which we can achieve computational efficiency and parallel scalability on contemporary and emerging HPC platforms. The presented performance evaluation is conducted on the DLR cluster CARO and on Juwels Booster. It shows how we have passed the tipping point, beyond which GPUs perform strictly better, by integrating GPUDirect and CUDA-aware MPI communication.

Item URL in elib:https://elib.dlr.de/193786/
Document Type:Conference or Workshop Item (Speech)
Title:Spliss: A Sparse Linear System Solver for Transparent Integration of Emerging HPC Technologies into CFD Solvers
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rempke, ArneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Krzikalla, OlafUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mohnke, JasminUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wendler, JohannesUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wagner, MichaelUNSPECIFIEDhttps://orcid.org/0000-0002-5767-1716UNSPECIFIED
Gerhold, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:24 January 2023
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Sparse Linear Algebra, Iterative Solvers, Performance, Spliss, HPC, CFD, CODA, CUDA, MPI
Event Title:Computational and Data Science Seminar
Event Location:Jülich, Deutschland
Event Type:Other
Organizer:Institute for Advanced Simulation, Jülich Supercomputing Centre
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Dresden
Institutes and Institutions:Institute of Software Methods for Product Virtualization > High Perfomance Computing
Deposited By: Rempke, Arne
Deposited On:07 Feb 2023 13:27
Last Modified:15 May 2023 16:34

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