Static scheduling of the LU factorization with look-ahead on asymmetric multicore processors
Visualitza/Obre
10.1016/j.parco.2018.04.006
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/133854
Tipus de documentArticle
Data publicació2018-08
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
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.
CitacióCatalán, S. [et al.]. Static scheduling of the LU factorization with look-ahead on asymmetric multicore processors. "Parallel computing", Agost 2018, vol. 76, p. 18-27.
ISSN0167-8191
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S0167819118301194
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LULA_AMP_PostPrint.pdf | 374,0Kb | Visualitza/Obre |