what is the meaning of rospack profile

edit

Is it to check the zombie file marked with * which ROS cannot use?

Then, what about those without * ?

 root@ShawnVM:~# rospack profile
Full tree crawl took 0.032583 seconds.
Directories marked with (*) contain no manifest.  You may
want to delete these directories.
To get just of list of directories without manifests,
re-run the profile with --zombie-only
-------------------------------------------------------------
0.025500   /opt/ros/indigo/share
0.005273   /root/catkin_ws/src
0.002334   /root/catkin_ws/src/rbx2
0.001137   /root/catkin_ws/src/rbx1
0.000451 * /opt/ros/indigo/share/ros
0.000345   /root/catkin_ws/src/roberta-ros
0.000265 * /opt/ros/indigo/share/ros/core
0.000179 * /opt/ros/indigo/share/man
0.000111 * /opt/ros/indigo/share/ros/core/rosbuild
0.000064 * /opt/ros/indigo/share/doc
0.000020 * /opt/ros/indigo/share/man/man1
0.000019 * /opt/ros/indigo/share/ros/config
0.000013 * /opt/ros/indigo/share/ros/core/rosbuild/bin
0.000009 * /opt/ros/indigo/share/ros/core/rosbuild/tests
0.000005 * /opt/ros/indigo/share/doc/liborocos-kdl