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| rdf:type
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| Description
| - Most of computations (subdomains problems) appearing in FETI-type methods are purely local and therefore parallelizable without any data transfers. However, if we want to accelerate also dual actions, some communication is needed due to primal-dual transition. Distribution of primal matrices is quite straightforward. Each of cores works with local part associated with its subdomains. Natural effort using the massively parallel computers is to maximize number of subdomains so that sizes of subdomain stiffness matrices are reduced which accelerates their factorization and subsequent pseudoinverse application, which belong to the most time consuming actions. On the other hand, negative effect of that is an increase of null space dimension and number of Lagrange multipliers on subdomains interfaces, i.e. dual dimension, so that the bottleneck of the TFETI method is the application of the projector, especially its part - so called coarse problem, which can be hardly solved sequentially on the master core for large scale problems. In this paper, we compare main strategies focusing on process of TFETI massively parallel implementation of the coarse problem and discuss some details of our FLLOP (Feti Light Layer on Petsc) implementation concerning computational and programming effectiveness for more complex engineering problems.
- Most of computations (subdomains problems) appearing in FETI-type methods are purely local and therefore parallelizable without any data transfers. However, if we want to accelerate also dual actions, some communication is needed due to primal-dual transition. Distribution of primal matrices is quite straightforward. Each of cores works with local part associated with its subdomains. Natural effort using the massively parallel computers is to maximize number of subdomains so that sizes of subdomain stiffness matrices are reduced which accelerates their factorization and subsequent pseudoinverse application, which belong to the most time consuming actions. On the other hand, negative effect of that is an increase of null space dimension and number of Lagrange multipliers on subdomains interfaces, i.e. dual dimension, so that the bottleneck of the TFETI method is the application of the projector, especially its part - so called coarse problem, which can be hardly solved sequentially on the master core for large scale problems. In this paper, we compare main strategies focusing on process of TFETI massively parallel implementation of the coarse problem and discuss some details of our FLLOP (Feti Light Layer on Petsc) implementation concerning computational and programming effectiveness for more complex engineering problems. (en)
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| Title
| - TFETI coarse problem massively parallel implementation
- TFETI coarse problem massively parallel implementation (en)
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| skos:prefLabel
| - TFETI coarse problem massively parallel implementation
- TFETI coarse problem massively parallel implementation (en)
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| skos:notation
| - RIV/61989100:27740/12:86084416!RIV13-MSM-27740___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/61989100:27740/12:86084416
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - TFETI; Natural coarse space matrix; FETI; Domain decomposition; Coarse problem (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...v/mistoKonaniAkce
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| http://linked.open...i/riv/mistoVydani
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| http://linked.open...i/riv/nazevZdroje
| - ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers
|
| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...iv/tvurceVysledku
| - Horák, David
- Hapla, Václav
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| http://linked.open...vavai/riv/typAkce
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| http://linked.open.../riv/zahajeniAkce
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| number of pages
| |
| http://purl.org/ne...btex#hasPublisher
| - Vienna University of Technology
|
| https://schema.org/isbn
| |
| http://localhost/t...ganizacniJednotka
| |
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