The impact of enabling multiple subdomains per MPI process in the TFETI domain decomposition method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27120%2F18%3A10237541" target="_blank" >RIV/61989100:27120/18:10237541 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27240/18:10237541 RIV/61989100:27730/18:10237541 RIV/61989100:27740/18:10237541

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0096300317304927" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0096300317304927</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.amc.2017.07.031" target="_blank" >10.1016/j.amc.2017.07.031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The impact of enabling multiple subdomains per MPI process in the TFETI domain decomposition method

Popis výsledku v původním jazyce

The paper deals with handling multiple subdomains per computational core in the PERMON toolbox, namely in the PermonFLLOP module, to fully exploit the potential of the Total Finite Element Tearing and Interconnecting (TFETI) domain decomposition method (DDM). Most authors researching FETI methods present weak parallel scalability with one subdomain assigned to each computational core, and call it just parallel scalability. Here we present an extension showing the data of more than one subdomain being held by each MPI process. Numerical experiments demonstrate the theoretically supported fact that for the given problem size and number of processors, the increased number of subdomains leads to better conditioning of the system operator, and hence faster convergence. Moreover, numerical, memory, strong parallel, and weak parallel scalability is reported, and optimal numbers of subdomains per core are examined. Finally, new PETSc matrix types dealing with the aforementioned extension are introduced.

Název v anglickém jazyce

The impact of enabling multiple subdomains per MPI process in the TFETI domain decomposition method

Popis výsledku anglicky

The paper deals with handling multiple subdomains per computational core in the PERMON toolbox, namely in the PermonFLLOP module, to fully exploit the potential of the Total Finite Element Tearing and Interconnecting (TFETI) domain decomposition method (DDM). Most authors researching FETI methods present weak parallel scalability with one subdomain assigned to each computational core, and call it just parallel scalability. Here we present an extension showing the data of more than one subdomain being held by each MPI process. Numerical experiments demonstrate the theoretically supported fact that for the given problem size and number of processors, the increased number of subdomains leads to better conditioning of the system operator, and hence faster convergence. Moreover, numerical, memory, strong parallel, and weak parallel scalability is reported, and optimal numbers of subdomains per core are examined. Finally, new PETSc matrix types dealing with the aforementioned extension are introduced.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10102 - Applied mathematics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

APPLIED MATHEMATICS AND COMPUTATION

ISSN

0096-3003

e-ISSN

—

Svazek periodika

319

Číslo periodika v rámci svazku

FEB 15 2018

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

586-597

Kód UT WoS článku

000415906200047

EID výsledku v databázi Scopus

2-s2.0-85026417381