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Architectural Trade-offs in the Energy-Efficient Era: A Comparative Study of power-capping NVIDIA H100 and H200
Aditya Ujeniya, Jan Eitzinger, Georg Hager +1
Modern NVIDIA GPUs like the H100 (HBM2e) and H200 (HBM3e) share similar compute characteristics but differ significantly in memory interface technology and bandwidth. By isolating…
Microarchitectural comparison and in-core modeling of state-of-the-art CPUs: Grace, Sapphire Rapids, and Genoa
Jan Laukemann, Georg Hager, Gerhard Wellein
With Nvidia's release of the Grace Superchip, all three big semiconductor companies in HPC (AMD, Intel, Nvidia) are currently competing in the race for the best CPU. In this work w…
SPEChpc 2021 Benchmarks on Ice Lake and Sapphire Rapids Infiniband Clusters: A Performance and Energy Case Study
Ayesha Afzal, Georg Hager, Gerhard Wellein
In this work, fundamental performance, power, and energy characteristics of the full SPEChpc 2021 benchmark suite are assessed on two different clusters based on Intel Ice Lake and…
Opening the Black Box: Performance Estimation during Code Generation for GPUs
Dominik Ernst, Georg Hager, Markus Holzer +2
Automatic code generation is frequently used to create implementations of algorithms specifically tuned to particular hardware and application parameters. The code generation proce…
ECM modeling and performance tuning of SpMV and Lattice QCD on A64FX
Christie Alappat, Nils Meyer, Jan Laukemann +4
The A64FX CPU is arguably the most powerful Arm-based processor design to date. Although it is a traditional cache-based multicore processor, its peak performance and memory bandwi…
Performance Modeling of Streaming Kernels and Sparse Matrix-Vector Multiplication on A64FX
Christie L. Alappat, Jan Laukemann, Thomas Gruber +4
The A64FX CPU powers the current number one supercomputer on the Top500 list. Although it is a traditional cache-based multicore processor, its peak performance and memory bandwidt…