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Roofline Performance Model for HPC and Deep-Learning Applications

Charlene Yang, NERSC, Lawrence Berkeley National Laboratory | Samuel Williams, CRD, Lawrence Berkeley National Laboratory | Yunsong Wang, NERSC, LBNL

GTC 2020

Learn how to use the Roofline model to analyze the performance of GPU-accelerated applications. We'll cover the basics of the model, explain how to use tools such as nvprof and Nsight Systems/Compute to automate the data collection, and demonstrate how to track progress using Roofline for both HPC and deep-learning applications. We'll use examples such as GPP from material science, high-performance geometric multigrid from adaptive mesh refinement, and two kernels from TensorFlow to show how characteristics such as arithmetic intensity, memory access pattern, and thread divergence/prediction can all be captured by Roofline, offering useful insights to performance optimization.

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