Implementation of 3D degridding algorithm on the NVIDIA GPUs using CUDA
Instrumentation and Methods for Astrophysics
2021-02-26 v1
Abstract
Practical aperture synthesis imaging algorithms work by iterating between estimating the sky brightness distribution and a comparison of a prediction based on this estimate with the measured data ("visibilities"). Accuracy in the latter step is crucial but is made difficult by irregular and non-planar sampling of data by the telescope. In this work we present a GPU implementation of 3d de-gridding which accurately deals with these two difficulties and is designed for distributed operation. We address the load balancing issues caused by large variation in visibilities that need to be computed. Using CUDA and NVidia GPUs we measure performance up to 1.2 billion visibilities per second.
Cite
@article{arxiv.2102.12739,
title = {Implementation of 3D degridding algorithm on the NVIDIA GPUs using CUDA},
author = {Karel Adámek and Peter Wortmann and Bojan Nikolic and Ben Mort and Wesley Armour},
journal= {arXiv preprint arXiv:2102.12739},
year = {2021}
}
Comments
Published in the proceedings of ADASS XXX