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May 8 – 12, 2023
Norfolk Waterside Marriott
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Performance Portability with Compiler Directives for Lattice QCD in the Exascale Era

May 8, 2023, 12:00 PM
Marriott Ballroom VII (Norfolk Waterside Marriott)

Marriott Ballroom VII

Norfolk Waterside Marriott

235 East Main Street Norfolk, VA 23510


Lin, Meifeng (Brookhaven National Laboratory)


The upcoming exascale computers in the United States and elsewhere will have diverse node architectures, with or without compute accelerators, making it a challenge to maintain a code base that is performance portable across different systems. As part of the US Exascale Computing Project (ECP), the USQCD collaboration has embarked on a collaborative effort to prepare the lattice QCD software suites for exascale, with a particular focus on achieving performance portability across diverse exascale architectures.

In this presentation, I will focus on efforts to use compiler directives, OpenMP and OpenACC, to port the Grid C++ lattice QCD library to AMD/Intel/NVIDIA GPUs and multi/many-core CPUs. Performance comparisons with architecture-native implementations in HIP, SYCL and CUDA will be given. I will also discuss the problems encountered and pros and cons of using compiler directives for performance portability.

Consider for long presentation Yes

Primary author

Lin, Meifeng (Brookhaven National Laboratory)

Presentation materials