Landau Gauge Fixing on GPUs

TL;DR

This paper demonstrates that GPU-accelerated Landau gauge fixing using CUDA significantly outperforms CPU implementations, achieving computational power comparable to hundreds of CPU cores for lattice gauge theory calculations.

Contribution

The paper introduces an efficient GPU implementation of Landau gauge fixing with Fourier acceleration, showing substantial performance gains over CPU methods.

Findings

GPU performance is comparable to 256 CPU cores.

CUDA implementation accelerates Landau gauge fixing significantly.

GPU can handle larger lattice volumes efficiently.

Abstract

In this paper we present and explore the performance of Landau gauge fixing in GPUs using CUDA. We consider the steepest descent algorithm with Fourier acceleration, and compare the GPU performance with a parallel CPU implementation. Using $32^4$ lattice volumes, we find that the computational power of a single Tesla C2070 GPU is equivalent to approximately 256 CPU cores.