Intel® Advisor User Guide

ID 766448
Date 12/16/2022
Public

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Analyze GPU Roofline

Measure and visualize the actual performance of GPU kernels using benchmarks and hardware metric profiling against hardware-imposed performance ceilings, as well as determine the main limiting factor, by running the GPU Roofline Insights perspective.

Use the Roofline chart to answer the following questions:

  • What is the maximum achievable performance with your current hardware resources?

  • Does your application work optimally on current hardware resources?

  • If not, what are the best candidates for optimization?

  • Is memory bandwidth or compute capacity limiting performance for each optimization candidate?

Run the GPU Roofline Insights to measure performance of SYCL, C++/Fortran with OpenMP* pragmas, Intel® oneAPI Level Zero (Level Zero), or OpenCL™ applications enabled to run on a GPU.

How It Works

The GPU Roofline Insights perspective includes the following steps:

  1. Collect OpenCL™ kernels timings and memory data using the Survey analysis with GPU profiling.
  2. Measure the hardware limitations and collect floating-point and integer operations data using the Characterization analysis with GPU profiling.

    Intel® Advisor calculates compute op