Scaling of a Fast Fourier Transform and a pseudo-spectral fluid solver up to 196608 cores

38Citations
Citations of this article
19Readers
Mendeley users who have this article in their library.
Get full text
This PDF is freely available from an open access repository. It may not have been peer-reviewed.

Abstract

In this paper we present scaling results of a FFT library, FFTK, and a pseudospectral code, Tarang, on grid resolutions up to 81923 grid using 65536 cores of Blue Gene/P and 196608 cores of Cray XC40 supercomputers. We observe that communication dominates computation, more so on the Cray XC40. The computation time scales as Tcomp∼p−1, and the communication time as Tcomm∼n−γ2 with γ2 ranging from 0.7 to 0.9 for Blue Gene/P, and from 0.43 to 0.73 for Cray XC40. FFTK, and the fluid and convection solvers of Tarang exhibit weak as well as strong scaling nearly up to 196608 cores of Cray XC40. We perform a comparative study of the performance on the Blue Gene/P and Cray XC40 clusters.

Cite

CITATION STYLE

APA

Chatterjee, A. G., Verma, M. K., Kumar, A., Samtaney, R., Hadri, B., & Khurram, R. (2018). Scaling of a Fast Fourier Transform and a pseudo-spectral fluid solver up to 196608 cores. Journal of Parallel and Distributed Computing, 113, 77–91. https://doi.org/10.1016/j.jpdc.2017.10.014

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free