PoS - Proceedings of Science
Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
HotQCD on multi-GPU Systems
D. Bollweg*, L. Altenkort, D. Anthony Clarke, O. Kaczmarek, L. Mazur, C. Schmidt, P. Scior and H.T. Shu
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Pre-published on: May 16, 2022
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We present $\texttt{SIMULATeQCD}$, 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.
DOI: https://doi.org/10.22323/1.396.0196
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