Hitting a Barrier Point
If you run one of the processes or threads in a group and it hits a barrier point, the Root Window displays Stopped in the Process State column for that process’s or thread’s entry, and the main Process Window displays Held in the title bar.
CLI: dstatus
If you create a barrier and all the process’s threads are already at that location, TotalView won’t hold any of them. However, if you create a barrier and all of the processes and threads are not at that location, TotalView holds any thread that is already there.