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

Krzikalla, Olaf; Rempke, Arne; Bleh, Alexander; Wagner, Michael; Gerhold, Thomas

doi:10.1007/978-3-030-79561-0_60

Cited by 14 publications

(11 citation statements)

References 8 publications

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“…An integral part of CODA is the Sparse Linear Systems Solver (Spliss) [9] that is used for solving linear equation systems for implicit time integration methods, e.g. for the test case used in this work.…”

Section: The Cfd Solver Codamentioning

confidence: 99%

Scalability Evaluation of the CFD Solver CODA on the AMD Naples Architecture

Wagner

2023

Sustained Simulation Performance 2021

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Computational fluid dynamics (CFD) simulations are an increasingly important part of aircraft design. They allow in-depth insight into the aerodynamic behavior of components and help reducing cost and time in development. CODA is a next-generation CFD solver for aerodynamic simulations of fully equipped aircraft. It is developed by the German Aerospace Center (DLR), the French Aerospace Lab (ONERA), and Airbus, and is one of the key applications represented in the European Centre of Excellence for Engineering Applications (Excellerat). This work evaluates the CODA CFD solver on the CARA HPC system based on the AMD Naples architecture. The evaluation includes an assessment of the scalability on the largest available partition of the production system with the NASA common research model in a strong scaling scenario, a comparison of different hybrid-parallel setups suitable for the specific memory and NUMA layout and a comparison of the results with the Intel Cascade Lake architecture. Furthermore, it demonstrates the impact of node placement and unfavorable network loads on large scale runs.

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Section: The Cfd Solver Codamentioning

confidence: 99%

Scalability Evaluation of the CFD Solver CODA on the AMD Naples Architecture

Wagner

2023

Sustained Simulation Performance 2021

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“…The Sparse Linear System Solver library Spliss is a novel block sparse linear library that is developed for large-scale CFD simulations; see [4]. Spliss is currently used in modern HPC CFD solver frameworks in aerospace and engineering, such as CODA [22] and TRACE [3].…”

Section: Realization In Sparse Linear System Solver Librarymentioning

confidence: 99%

“…We implement and benchmark these techniques into the Sparse linear system solver library Spliss, a modern HPC library for solving block sparse linear algebra problems that is developed at the German Aerospace Center (DLR); see, e.g., [4]. Spliss is especially well-suited to solve the problem at hand, since its modular and templatized structure allows us to build onto its existing performant solvers.…”

Section: Introductionmentioning

confidence: 99%

SIMD vectorization for simultaneous solution of locally varying linear systems with multiple right-hand sides

et al. 2023

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Developments in numerical simulation of flows and high-performance computing influence one another. More detailed simulation methods create a permanent need for more computational power, while new hardware developments often require changes to the software to exploit new hardware features. This dependency is very pronounced in the case of vector-units which are featured by all modern processors to increase their numerical throughput but require vectorization of the software to be used efficiently. We study the vectorization of a simulation method that exhibits an inherent level of vector-parallelism. This is of particular interest as SIMD operations will hopefully be available with std::simd in a future C++ standard. The simulation method considered here results in the simultaneous solution of multiple sparse linear systems of equations which only differ by their main diagonal and right-hand sides. Such structure arises in the simulation of unsteady flow in turbomachinery by means of a frequency domain approach called harmonic balance.

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“…The Sparse Linear System Solver library Spliss is a novel block sparse linear library that is developed for large scale CFD simulations; see [8]. Spliss is currently used in modern HPC CFD solver frameworks in aerospace and engineering, such as CODA [7] and TRACE [3].…”

Section: Realization In Sparse Linear System Solver Librarymentioning

confidence: 99%

“…We implement and benchmark these techniques into the Sparse linear system solver library Spliss, a modern HPC library for solving block sparse linear algebra problems that is developed at the German Aerospace Center (DLR); see, e.g., [8]. Spliss is especially well-suited to solve the problem at hand, since its modular and templatized structure allows us to build onto its existing performant solvers.…”

Section: Introductionmentioning

confidence: 99%

SIMD vectorization for simultaneous solution of locally varying linear systems with multiple right hand sides

Kühn

Holke

Lutz

et al. 2022

Preprint

Self Cite

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Developments in numerical simulation of flows and high performance computing influence one another. More detailed simulation methods create a permanent need for more computational power, while new hardware developments often require changes to the software to exploit new hardware features.This dependency is very pronounced in the case of vector-units which are featured by all modern processors to increase their numerical throughput but require vectorization of the software to be used efficiently. We study the vectorization of a simulation method that exhibits an inherent level of vector-parallelism. This is of particular interest as SIMD operations will hopefully be available with std::simd in a future C++ standard.The simulation method considered here results in the simultaneous solution of multiple sparse linear systems of equations which only differ by their main diagonal and right hand sides. Such structure arises in the simulation of unsteady flow in turbomachinery by means of a frequency domain approach called harmonic balance.

show abstract

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

Cited by 14 publications

References 8 publications

Scalability Evaluation of the CFD Solver CODA on the AMD Naples Architecture

Scalability Evaluation of the CFD Solver CODA on the AMD Naples Architecture

SIMD vectorization for simultaneous solution of locally varying linear systems with multiple right-hand sides

SIMD vectorization for simultaneous solution of locally varying linear systems with multiple right hand sides

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