Multi-threaded, multi-process, and distributed programs contain a variety of IDs. The following types are used in the CLI and the GUI:
System PID
This is the process ID and is generally called the PID.
System TID
This is the ID of the system kernel or user thread. On some systems (for example, AIX), the TIDs have no obvious meaning. On other systems, they start at 1 and are incremented by 1 for each thread.
NextGen TotalView for HPCthread ID
This is usually identical to the system TID. On some systems (such as AIX) where the threads have no obvious meaning, NextGen TotalView for HPC uses its own IDs.
pthread ID
This is the ID assigned by the Posix pthreads package. If this differs from the system TID, the TID is a pointer value that points to the pthread ID.
Debugger PID
This is an ID created by NextGen TotalView for HPC to identify processes. It is a sequentially numbered value beginning at 1 that is incremented for each new process. If the target process is killed and restarted (that is, you use the dkill and drun commands), the NextGen TotalView for HPC PID does not change. The system PID changes, however, since the operating system has created a new target process.