Use of Direct Solvers in TFETI Massively Parallel Implementation

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dc.contributor.authorHapla, Václav
dc.contributor.authorHorák, David
dc.contributor.authorMerta, Michal
dc.date.accessioned2013-04-15T08:01:21Z
dc.date.available2013-04-15T08:01:21Z
dc.date.issued2013
dc.description.abstractThe FETI methods blend iterative and direct solvers. The dual problem is solved iteratively using e.g. CG method; in each iteration, the auxiliary problems related to the application of an unassembled system matrix (subdomain problems’ solutions and projector application in dual operator) are solved directly. The paper deals with the comparison of the direct solvers available in PETSc on the Cray XE6 machine HECToR (PETSc, MUMPS, SuperLU) regarding their performance in the two most time consuming actions in TFETI – the pseudoinverse application and the coarse problem solution. For the numerical experiments, our novel TFETI implementation in FLLOP (FETI Light Layer on top of PETSc) library was used.cs
dc.description.sourceScopuscs
dc.format.extent640450 bytescs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMANNNINEN, P. a P. ÖSTER, eds. Applied parallel and scientific computing: 11th International Conference, PARA 2012: Helsinki, Finland, June 10-13, 2012: revised selected papers. Berlin: Springer, 2013. s. 192-205.cs
dc.identifier.doi10.1007/978-3-642-36803-5_14
dc.identifier.isbn978-3-642-36802-8
dc.identifier.issn0302-9743
dc.identifier.locationNení ve fondu ÚKcs
dc.identifier.urihttp://hdl.handle.net/10084/96258
dc.language.isoencs
dc.publisherSpringercs
dc.relation.ispartofseriesMANNNINEN, P. a P. ÖSTER, eds. Applied parallel and scientific computing: 11th International Conference, PARA 2012: Helsinki, Finland, June 10-13, 2012: revised selected paperscs
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/283493cs
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/283493/EU//HPC-EUROPA2
dc.relation.urihttp://dx.doi.org/10.1007/978-3-642-36803-5_14cs
dc.rights© Springercs
dc.rights.accessclosedAccess
dc.subjectdomain decompositioncs
dc.subjectFETIcs
dc.subjecttotal FETIcs
dc.subjectTFETIcs
dc.subjectFLLOPcs
dc.subjectPETSccs
dc.subjectparallel direct solvercs
dc.subjectpseudoinversecs
dc.subjectnatural coarse space matrixcs
dc.subjectcoarse problemcs
dc.titleUse of Direct Solvers in TFETI Massively Parallel Implementationcs
dc.typearticlecs
dc.type.statusPeer-reviewedcs
dc.type.versionpublishedVersioncs

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