If you worked with VTune Performance Analyzer on Windows then probably you are regular to create projects. Project is a kind of logic unit containing a number of activities and activities results. The command
displays the project tree of activities and activities results.
The default mode of 'vtl' is to have only one project. By default it's root path will be in $HOME/.VTune. The environment variable VTUNE_USER_DIR overwrites this default value.
(See 'Setting Environment Variables for vtl' in the manual for more info)
So here is the 'trick'. Create new projects and return back to existing projects by setting the environment variable VTUNE_USER_DIR to the appropriate paths.
-Create new project per need.
-Maintain small projects.
-Give meaningful names for your project directories.
-Add some text file inside the project directory with the description of the project.