The Tools tab lets you add runtime analysis tools to the launch. To do this, click the Add/Delete Tool button at the bottom of the tab:
The Tools tab in the Launch Configurations dialog.
You can add the following tools (some launch options affect which tools are available):
For detailed information about the fields on this tab, see Launching your program with Memory Analysis.
Selecting Join Partition indicates that you want so specify a specific partition in which to run the program.
The Select Partition list shows the available partitions that you can use to run your program.
If you want the IDE to open the appropriate perspective for the tool during the launch, then check Switch to this tool's perspective on launch.