Enabling parallel computing in crash
| Autor: | Benedetta Ciardi, Adrian M. Partl, Andrea Ferrara, Antonella Maselli, Volker Müller |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Computation Astronomy and Astrophysics Domain decomposition methods Parallel computing Supercomputer 01 natural sciences Set (abstract data type) Test case Space and Planetary Science 0103 physical sciences Code (cryptography) Radiative transfer Distributed memory 010306 general physics 010303 astronomy & astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 414:428-444 |
| ISSN: | 0035-8711 |
| DOI: | 10.1111/j.1365-2966.2011.18401.x |
| Popis: | We present the new parallel version (pCRASH2) of the cosmological radiative transfer code CRASH2 for distributed memory supercomputing facilities. The code is based on a static domain decomposition strategy inspired by geometric dilution of photons in the optical thin case that ensures a favourable performance speed-up with increasing number of computational cores. Linear speed-up is ensured as long as the number of radiation sources is equal to the number of computational cores or larger. The propagation of rays is segmented and rays are only propagated through one sub-domain per time step to guarantee an optimal balance between communication and computation. We have extensively checked pCRASH2 with a standardised set of test cases to validate the parallelisation scheme. The parallel version of CRASH2 can easily handle the propagation of radiation from a large number of sources and is ready for the extension of the ionisation network to species other than hydrogen and helium. |
| Databáze: | OpenAIRE |
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