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Communication Dans Un Congrès Année : 2016

A Case Study of the Reproducibility Issues in EigenExa

Résumé

In this article, we study the accuracy and reproducibility issues in EigenExa due to the non-associative of floating-point operations, rounding-off errors, dynamic thread scheduling, and different reduction trees, etc. By investigating the EigenExa’s algorithmic structure and the corresponding implementation, we find the origins of the non-reproducibility and demonstrate it on the numerical results. As a solution, we, at first, propose to apply the accurate and reproducible parallel reduction from the ExBLAS library. Moreover, we outline possible extensions to ExBLAS that would enhance further the numerical properties of EigenExa.
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Dates et versions

hal-01539365 , version 1 (14-06-2017)

Identifiants

  • HAL Id : hal-01539365 , version 1

Citer

Roman Iakymchuk, Imamura Toshiyuki, Stef Graillat, Stefano Markidis, Erwin Laure. A Case Study of the Reproducibility Issues in EigenExa. EASC2016, Exascale Applications and Software Conference, Apr 2016, Stockholm, Sweden. ⟨hal-01539365⟩
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