Asynchronous communication in spectral-element and discontinuous Galerkin methods for atmospheric dynamics – a case study using the High-Order Methods Modeling Environment (HOMME-homme_dg_branch)

Jamroz, B. F., Klöfkorn, R.. (2016). Asynchronous communication in spectral-element and discontinuous Galerkin methods for atmospheric dynamics – a case study using the High-Order Methods Modeling Environment (HOMME-homme_dg_branch). Geoscientific Model Development, doi:10.5194/gmd-9-2881-2016

Title Asynchronous communication in spectral-element and discontinuous Galerkin methods for atmospheric dynamics – a case study using the High-Order Methods Modeling Environment (HOMME-homme_dg_branch)
Author(s) Benjamin F. Jamroz, Robert Klöfkorn
Abstract The scalability of computational applications on current and next-generation supercomputers is increasingly limited by the cost of inter-process communication. We implement non-blocking asynchronous communication in the High-Order Methods Modeling Environment for the time integration of the hydrostatic fluid equations using both the spectral-element and discontinuous Galerkin methods. This allows the overlap of computation with communication, effectively hiding some of the costs of communication. A novel detail about our approach is that it provides some data movement to be performed during the asynchronous communication even in the absence of other computations. This method produces significant performance and scalability gains in large-scale simulations.
Publication Title Geoscientific Model Development
Publication Date Aug 26, 2016
Publisher's Version of Record https://dx.doi.org/10.5194/gmd-9-2881-2016
OpenSky Citable URL https://n2t.net/ark:/85065/d7g44rz1
OpenSky Listing View on OpenSky
CISL Affiliations TDD, ASAP, CMG

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