O(a)-improved QCD+QED Wilson Dirac operator on GPUs - INSPIRE

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O(a)-improved QCD+QED Wilson Dirac operator on GPUs

Anian Altherr
(
- Zurich, ETH
)
,
Isabel Campos
(
- Cantabria Inst. of Phys.
)
,
Jonathan Coles
(
- Zurich, ETH-CSCS/SCSC
)
,
Alessandro Cotellucci
(
- Humboldt U., Berlin (main) and
- Julich, NIC
)
,
Juan Antonio Fernández De la Garza
(
- Zurich, ETH
)

Feb 4, 2025

9 pages

Published in:

PoS LATTICE2024 (2025) 280

Contribution to:

- Lattice 2024
, 280
,
- Lattice 2024

Published: Feb 12, 2025

e-Print:

2502.02490 [hep-lat]

DOI:

10.22323/1.466.0280

View in:

ADS Abstract Service

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Abstract: (SISSA)

Markov Chain Monte Carlo simulations of lattice Quantum Chromodynamics(QCD) are the only known tool to investigate non-perturbatively the theoryof the strong interaction and are required to perform precision tests ofthe Standard Model of Particle Physics.As the Markov Chain is a serial process, the sole option for improving the sampling rate is accelerating each individual update step.Heterogeneous clusters of GPU-accelerated nodes offer large total memorybandwidth which can be used to speed-up our application, openQxD-1.1,which is dominated by inversions of the Dirac operator, a large sparsematrix.In this work we investigate offloading the inversion to GPU using thelattice-QCD library QUDA, and our early results demonstrate a significantpotential speed-up in the time-to-solution for state-of-the-art problemsizes.Minimal extensions to the existing QUDA library are required for ourspecific physics programme while greatly enhancing the performanceportability of our code and retaining the reliability and robustness ofexisting applications in openQxD-1.1.Our new interface will enable us to utilize pre-exascale infrastructure andreduce the systematic uncertainty in our physics predictions byincorporating the effects of quantum electromagnetism (QED) in our simulations.

References(10)

Figures(1)

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(
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)

et al.

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•
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)

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Jesus Espinoza-Valverde
(
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)
,
Andreas Frommer
(
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)
,
Gustavo Ramirez-Hidalgo
(
- Wuppertal U.
)
,
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)

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