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First load the environment module:

module add vtune/XXXX

Intro:
https://ci.spdk.io/download/2019-summit-prc/02_Presentation_02_VTune_and_Analyzers_Overview_Sri.pdf
www.intel.com/content/www/us/en/docs/vtune-profiler/get-started-guide/2023/linux-os.html

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vtune -help

Run VTune via the command line interface

Run your application with VTune wrapper as follows:
www.intel.com/content/www/us/en/docs/vtune-profiler/user-guide/2023-0/command-line-interface.html

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ssh -L 127.0.0.1:55055:127.0.0.1:55055 blogin.hlrn.de
salloc -p standard96:test -t 01:00:00
ssh -L 127.0.0.1:55055:127.0.0.1:55055 $SLURM_NODELIST
module add intel/19.0.5 impi/2019.9 vtune/2022
vtune-backend --web-port=55055 --enable-server-profiling &

Open 127.0.0.1:55055 in your browser (allow security exception, if first time set initial password).

In 1^st "Welcome" VTune tab (run MPI parallel Performance Snapshot):

Under WHAT clickClick: Configure Analysis
-> Set application:  /path-to-your-application/program.exe
-> Check: Use app. dir. as work dir.
-> In case of MPI parallelism, expand "Advanced": keep defaults but paste the following wrapper script and check "Trace MPI":

#!/bin/bash

echo
"Target
process PID: ${VTUNE_TARGET_PID}"

# Run VTune collector (here with 4 MPI ranks)
mpirun -np 4 "$@"

Under HOW, run a general: Performance Snapshot.
(After completion/result finalization a 2^nd result tab opens automatically.)

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-> Here you find several analysis results e.g. the HPC Perf. Characterization.
-> Under Performance Snapshot - depending on the snapshot outcome - VTune suggests (see % in the figure below) more detailed follow-up analysis types:

Image Added
--> For example select/run a Hotspot analysis:

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-> Expand sub-tab Top-down Tree
--> In Function Stack expand the "_start" function and expand further down to the "main" function (first with an entry in the source file column)
--> Double In the source file column double-click on : "filename.c" of the "main" function

-> In the new sub-tab "filename.c" scroll down to the line with maximal CPU Time: Total to find hotspothotspots in the main function

To quit the debug session press "Exit" in the VTune "Menu" (upper left symbol of "three horizontal bars"). Then close the browser page. Exit your compute node via CTRL+D and kill your interactive job:

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