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Static scheduling of the LU factorization with look-ahead on asymmetric multicore processors
dc.contributor.author | Catalán, Sandra | |
dc.contributor.author | Herrero, José R. | |
dc.contributor.author | Quintana-Orti, Enrique S. | |
dc.contributor.author | Rodríguez Sánchez, Rafael | |
dc.date.accessioned | 2018-06-25T07:18:07Z | |
dc.date.available | 2018-06-25T07:18:07Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Sandra Catalán, José R. Herrero, Enrique S. Quintana-Ortí, Rafael Rodríguez-Sánchez, Static scheduling of the LU factorization with look-ahead on asymmetric multicore processors, Parallel Computing, Volume 76, 2018, Pages 18-27, ISSN 0167-8191, https://doi.org/10.1016/j.parco.2018.04.006. | ca_CA |
dc.identifier.issn | 0167-8191 | |
dc.identifier.uri | http://hdl.handle.net/10234/175319 | |
dc.description.abstract | We analyze the benefits of look-ahead in the parallel execution of the LU factorization with partial pivoting (LUpp) in two distinct “asymmetric” multicore scenarios. The first one corresponds to an actual hardware-asymmetric architecture such as the Samsung Exynos 5422 system-on-chip (SoC), equipped with an ARM big.LITTLE processor consisting of a quad-core Cortex-A15 cluster plus a quad-core Cortex-A7 cluster. For this scenario, we propose a careful mapping of the different types of tasks appearing in LUpp to the computational resources, in order to produce an efficient architecture-aware exploitation of the computational resources integrated in this SoC. The second asymmetric configuration appears in a hardware-symmetric multicore architecture where the cores can individually operate at a different frequency levels. In this scenario, we show how to employ the frequency slack to accelerate the tasks in the critical path of LUpp in order to produce a faster global execution as well as a lower energy consumption. | ca_CA |
dc.format.extent | 10 p. | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.relation.isPartOf | Parallel Computing, Volume 76, August 2018 | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/CNE/1.0/ | * |
dc.subject | Dense linear algebra | ca_CA |
dc.subject | LU factorization | ca_CA |
dc.subject | Look-ahead | ca_CA |
dc.subject | Asymmetric multicore processors | ca_CA |
dc.subject | Multi-threading | ca_CA |
dc.subject | Frequency scaling | ca_CA |
dc.title | Static scheduling of the LU factorization with look-ahead on asymmetric multicore processors | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | https://doi.org/10.1016/j.parco.2018.04.006 | |
dc.relation.projectID | TIN2014-53495-R ; TIN2017-82972-R ; TIN2015-65316-P ; 2017-SGR-1414 | ca_CA |
dc.rights.accessRights | info:eu-repo/semantics/restrictedAccess | ca_CA |
dc.relation.publisherVersion | https://www.sciencedirect.com/science/article/pii/S0167819118301194 | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion | ca_CA |
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