Solving Contact Mechanics Problems with PERMON

Hapla, Vaclav; Horák, David; Pospíšil, Lukáš; Čermák, Martin; Vašatová, Alena; Sojka, Radim

doi:10.1007/978-3-319-40361-8_7

Cited by 10 publications

(8 citation statements)

References 23 publications

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“…The PERMON [18] software package is an MPI-parallel implementation of the FETI method focusing on engineering applications and will be used as a target application throughout this section.…”

Section: Feti Methods and Their Implementationsmentioning

confidence: 99%

The READEX formalism for automatic tuning for energy efficiency

et al. 2017

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Energy efficiency is an important aspect of future exascale systems, mainly due to rising energy cost. Although High performance computing (HPC) applications are compute centric, they still exhibit varying computational characteristics in different regions of the program, such as compute-, memory-, and I/O-bound code regions. Some of today's clusters already offer mechanisms to adjust the system to the resource requirements of an application, e.g., by controlling the CPU frequency. However, manually tuning for improved energy efficiency is a tedious and painstaking task that is often neglected by application developers. The European Union's Horizon 2020 project READEX (Runtime Exploitation of Application Dynamism for Energyefficient eXascale computing) aims at developing a tools-aided approach for improved energy efficiency of current and future HPC applications. To reach this goal, the READEX project combines technologies from two ends of the compute spectrum, embedded systems and HPC, constituting a split design-time/runtime methodology. dynamic auto-tuning of fine-grained application regions using the systems scenario methodology, which was originally developed for improving the energy efficiency in embedded systems. This paper introduces the concepts of the READEX project, its envisioned implementation, and preliminary results that demonstrate the feasibility of this approach.

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Section: Feti Methods and Their Implementationsmentioning

confidence: 99%

The READEX formalism for automatic tuning for energy efficiency

et al. 2017

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“…The quadratic program is solved in parallel by the PermonQP library (Hapla et al, 2016;Kružík et al, 2020;Hapla et al, 2021), which uses the PETSc library (Balay et al, 1997(Balay et al, , 2019. The fluxes, f j1j2 , are then used to conservatively transfer effective area and tracer quantities between destination polygons, removing excess effective area.…”

Section: Optimization-based Flux Correction To Remappingmentioning

confidence: 99%

Geometric remapping of particle distributions in the Discrete Element Model for Sea Ice (DEMSI v0.0)

Turner

Peterson

Bolintineanu

2021

Preprint

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Abstract. A new sea ice dynamical core, the Discrete Element Model for Sea Ice (DEMSI), is under development for use in coupled Earth system models. DEMSI is based on the discrete element method, which models collections of ice floes as interacting Lagrangian particles. In basin-scale sea ice simulations the Lagrangian motion results in significant convergence and ridging, which requires periodic remapping of sea ice variables from a deformed particle configuration back to an undeformed initial distribution. At the resolution required for Earth system models we cannot resolve individual sea ice floes, so we adopt the sub-gridscale thickness distribution used in continuum sea ice models. This choice leads to a series of hierarchical tracers depending on ice fractional area or concentration that must be remapped consistently. The circular discrete elements employed in DEMSI help improve the computational efficiency at the cost of increased complexity in the effective element area definitions for sea ice cover that are required for the accurate enforcement of conservation. An additional challenge is the accurate remapping of element values along the ice edge, the location of which varies due to the Lagrangian motion of the particles. In this paper we describe a particle-to-particle remapping approach based on well-established geometric remapping ideas that enforces conservation, bounds-preservation, and compatibility between associated tracer quantities, while also robustly managing remapping at the ice edge. One element of the remapping algorithm is a novel optimization-based flux correction that enforces concentration bounds in the case of non-uniform motion. We demonstrate the accuracy and utility of the algorithm in a series of numerical test cases.

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“…The software package PERMON [18] solves quadratic programming problems with the help of FETI methods [15] for domain decomposition. PERMON extends PETSc [3] and is used mainly for simulating mechanical structure, for example linear elasticity, elasto-plasticity and shape optimization.…”

Section: Permonmentioning

confidence: 99%

Generic Library Interception for Improved Performance Measurement and Insight

Brendel

Wesarg

Tschüter

et al. 2019

Lecture Notes in Computer Science

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As applications grow in capability, they also grow in complexity. This complexity in turn gets pushed into modules and libraries. In addition, hardware configurations become increasingly elaborate, too. These two trends make understanding, debugging and analyzing the performance of applications more and more difficult.To enable detailed insight into library usage of applications, we present an approach and implementation in Score-P that supports intuitive and robust creation of wrappers for arbitrary C/C++ libraries. Runtime analysis then uses these wrappers to keep track of how applications interact with libraries, how they interact with each other, and record the exact timing of their functions.

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Solving Contact Mechanics Problems with PERMON

Cited by 10 publications

References 23 publications

The READEX formalism for automatic tuning for energy efficiency

The READEX formalism for automatic tuning for energy efficiency

Geometric remapping of particle distributions in the Discrete Element Model for Sea Ice (DEMSI v0.0)

Generic Library Interception for Improved Performance Measurement and Insight

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