HotQCD on Multi-GPU Systems

Abstract

We present $\text{SIMULATeQCD}$, HotQCD's software for performing lattice QCD calculations on GPUs. Started in late 2017 and intended as a full replacement of the previous single GPU lattice QCD code used by the HotQCD collaboration, our software has been developed into an extensive framework for lattice QCD calculations distributed on multiple GPUs over many compute nodes. The code is built on C++, CUDA, and MPI and leverages modern C++ language features to provide high-level data structures, objects, and algorithms that allow users to express lattice QCD calculations in an intuitive way without sacrificing performance. Implemented algorithms range from gradient flow, correlator measurements, and mixed precision conjugate gradient solvers all the way to full HISQ gauge field configuration generation using RHMC. After successful deployment in large-scale computing projects, we want to share the result of our efforts with the lattice QCD community by making it publicly available. In these proceedings, we will present some of the key features of our code, demonstrate its ease of use, and show benchmarks of performance critical kernels on state-of-the-art supercomputers.

arXiv comment7 pages, 3 figures, presented at the 38th International Symposium on Lattice Field Theory

References in corpus (8)

• Properties and uses of the Wilson flow in lattice QCD
• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• Locality and exponential error reduction in numerical lattice gauge theory
• Chiral phase transition temperature in (2+1)-Flavor QCD
• The RHMC Algorithm for 2 Flavours of Dynamical Staggered Fermions
• Symanzik improvement of the gradient flow in lattice gauge theories
• Heavy quark momentum diffusion from the lattice using gradient flow
• Sensitivity of the Polyakov loop and related observables to chiral symmetry restoration

Cited by in corpus (17)

• Heavy Quark Diffusion from 2+1 Flavor Lattice QCD with 320 MeV Pion Mass
• Quark Mass Dependence of Heavy Quark Diffusion Coefficient from Lattice QCD
• Equation of state and speed of sound of (2+1)-flavor QCD in strangeness-neutral matter at non-vanishing net baryon-number density
• SIMULATeQCD: A simple multi-GPU lattice code for QCD calculations
• Viscosity of pure-glue QCD from the lattice
• Curvature of the chiral phase transition line from the magnetic equation of state of (2+1)-flavor QCD
• Streamlined data analysis in Python
• Microscopic Encoding of Macroscopic Universality: Scaling Properties of Dirac Eigenspectra near QCD Chiral Phase Transition
• Lattice $B$-field correlators for heavy quarks
• Searching for the QCD critical point using Lee-Yang edge singularities
• Temperature Dependence of Heavy Quark Diffusion from (2+1)-flavor Lattice QCD
• In-medium bottomonium properties from lattice NRQCD calculations with extended meson operators
• Study of quarkonium in QGP from unquenched lattice QCD
• Pion screening mass at finite chemical potential
• Isothermal and isentropic speed of sound in (2+1)-flavor QCD at non-zero baryon chemical potential
• Study of charm and beauty in QGP from unquenched lattice QCD
• Shear and bulk viscosities of the gluon plasma across the transition temperature from lattice QCD