Do moldable applications perform better on failure-prone HPC platforms?

TitleDo moldable applications perform better on failure-prone HPC platforms?
Publication TypeConference Paper
Year of Publication2018
AuthorsLe Fèvre, V., G. Bosilca, A. Bouteiller, T. Herault, A. Hori, Y. Robert, and J. Dongarra
Conference Name11th Workshop on Resiliency in High Performance Computing in Clusters, Clouds, and Grids
Date Published08-2018
PublisherSpringer Verlag
Conference LocationTurin, Italy
Abstract

This paper compares the performance of different approaches to tolerate failures using checkpoint/restart when executed on large-scale failure-prone platforms. We study (i) Rigid applications, which use a constant number of processors throughout execution; (ii) Moldable applications, which can use a different number of processors after each restart following a fail-stop error; and (iii) GridShaped applications, which are moldable applications restricted to use rectangular processor grids (such as many dense linear algebra kernels). For each application type, we compute the optimal number of failures to tolerate before relinquishing the current allocation and waiting until a new resource can be allocated, and we determine the optimal yield that can be achieved. We instantiate our performance model with a realistic applicative scenario and make it publicly available for further usage.

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