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intel-vtune-profiler.nswi126-demo.md

Intel VTune Profiler Demo for NSWI126

Installation

Matrix multiplication analysis tutorial

Matrix multiplication project is available with the VTune Profiler application.

Agenda

  1. Open and create project

  2. Initial measurements - Performance Snapshot

  3. Hotspots, inspect bottom-up, source and flamegraph

  4. Memory Access issues

  5. Update the algorithm - multiplication2, check optimization levels (-O1) and make

  6. Check Performance Snapshot

  7. Increase optimization level to -O3 - auto vectorization for g++ and make

  8. Check Performance Snapshot and HPC Characterization

  9. Enable AVX512 vectorization - in my case for Skylake architecture add CXXFLAG -march=skylake-avx512 (choose appropriate for your CPU) and make

  10. Check Performance Snapshot and Micro Architecture Analysis

  11. Compare results

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