Vtune

Basic use of vtune

To use vtune tou need to belong to the vtune group (check with id -a) . If necessary, send an e-mail to support-uit@notur.no to update your group membership.

• Login on stallo2

ssh -Y yourname@stallo-login2.uit.no

•  define a workspace
  
  

  mkdir /global/work/yourname/vtune

  export VTUNE_GLOBAL_DIR=/global/work/yourname/vtune

• start the vtune GUI

/opt/intel/vtune/bin/vtlec

• click on the yellow cross
  
• click on first use wizard
  
• Under "Application to launch" write the name with full path of your script or executable
  
• click finish
  
• If you used a script, write the name with full path of your executable
  
• click finish
  
• In your timing overview, click on your executable under "Module"

Profiling an MPI job

• start an interactive session

 qsub -I  -lnodes=12 -lwalltime=2:0:0 -A nn1123k

• enable communication with vtune tools (on compute node)

 /opt/intel/vtune/bin/vtserver  --no-auth -d  /global/work/myname/perfdata

• on stallo2 , launch the application (we assume the compute node is c38-5)
  

 /opt/intel/vtune/bin/vtl activity MyActivity -c sampling,,c38-5  -app /my/path/myjob,,,c38-5   -moi /my/path/myapp.exec run

FILE->Open FIle

choose /global/work/myname/perfdata/vtserver_myname/sampling.tb5

In lower left part of GUI, right click on "Imported Sampling Results", choose "Open summary view"

then in the main GUI window click on your myapp.exec and profiling data should appear