Application of GPUs for the Calculation of Two Point Correlation Functions in Cosmology

Autor:	Ponce, Rafael, Cardenas-Montes, Miguel, Rodriguez-Vazquez, Juan Jose, Sanchez, Eusebio, Sevilla, Ignacio
Rok vydání:	2012
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Cosmology and Extragalactic Astrophysics Physics - Computational Physics
Druh dokumentu:	Working Paper
Popis:	In this work, we have explored the advantages and drawbacks of using GPUs instead of CPUs in the calculation of a standard 2-point correlation function algorithm, which is useful for the analysis of Large Scale Structure of galaxies. Taking into account the huge volume of data foreseen in upcoming surveys, our main goal has been to accelerate significantly the analysis codes. We find that GPUs offer a 100-fold increase in speed with respect to a single CPU without a significant deviation in the results. For comparison's sake, an MPI version was developed as well. Some issues, like code implementation, which arise from using this option are discussed. Comment: To appear in the ADASS XXI (Paris, 2011) conference proceedings. Code available at http://wwwae.ciemat.es/cosmo/gp2pcf/
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1204.6630 Zobrazit plný text záznamu View this record from Arxiv