Intel Advisor XE (Vectorisation analysis)

Version 0.1, 09.01.2017
Please send feedback or questions to heinrich.bockhorst(at)intel.com

Load the necessary modules

$ module load Intel
$ module load Advisor

Analysis

This tool analyses SIMD vectorisation of programs compiled with Intel compiler. Please add "-g" to the compile line.
The analysis is done in several steps. The results of each step are accumulated into the current display.
All steps can be done using the Advisor GUI:

$ advixe-gui

For analysis on clusters it may be good to do these steps using the command line interface because there might be no X connection.

• Getting help:
  

  $ advixe-cl --help > advisor_help.txt
  

• Getting help on collection:
  

  $ advixe-cl --help collect > advisor_help_collect.txt
  

• Survey analysis (light weight profiling):
  

  $ advixe-cl --collect survey --project-dir ADV -- $PRG $FLAGS
  

• Analyse survey results - subset of loops printed in csv format:
  

  $ advixe-cl --report=survey -format=csv --project-dir ADV | cut -d "," -f 1,2,3,5,6 > survey_short.txt
  

  —> Shows all loops. Loops that are not vectorised are marked with "SCALAR". Note the IDs (first column) of the top scalar loops for later use.
  —> Can be also viewed by the GUI.
  

• Trip count and flops analysis:
  

  $ advixe-cl --collect tripcounts -flops-and-masks --project-dir ADV -- $PRG $FLAGS
  

• Dependency analysis for Loop ID=5 shows to be scalar in survey above (for example, you may have other IDs):
  

  $ advixe-cl --collect dependencies -mark-up-list=5 --project-dir ADV -- $PRG $FLAGS
  

• Map (memory) analyis for the above loop showing stride:
  

  $ advixe-cl --collect map -mark-up-list=5 --project-dir ADV -- $PRG $FLAGS
  

  —> view results with GUI or ASCII report
  

• Generate snapshot (compressed result file). Can be copied to another computer and analysed:
  

  $ advixe-cl --snapshot --project-dir ADV --pack --cache-sources --cache-binaries -- snapshot_01
  

  —> Open snapshot by starting the GUI and select "open result".