State Code

The process state code indicates the state for a process.

Short Code	Meaning	Description
D	Uninterruptible sleep	Usually refers to IO processes.
l	Is multi-threaded (using CLONE_THREAD, like NPTL pthreads do)
L	Has pages locked into memory (for real-time and custom IO)
N	Low-priority (nice to other users)
R	Running runnable (on run queue)
s	Is a session leader
S	Interruptible sleep	Waiting for an event to complete.
T	Stopped	May have been stopped by control signal or trace.
W	Paging	Storing or retrieving data.
Z	Defunct (“zombie”) process	Terminated but not collected by its parent process.
<	High-priority
+	Belongs to foreground process group.