This chart lists all the processes currently running on the system. The %CPU column displays the share of elapsed CPU time expressed as a percentage of total CPU time. The column STATE displays the process state.
The Process State Codes:
D: uninterruptible sleep (usually IO)
R: runnable (on run queue)
S: sleeping
T: traced or stopped
Z: a defunct ("zombie") process
Additional letters may be displayed:
W: has no resident pages
<: high-priority process
N: low-priority task
L: has pages locked into memory (for real-time and custom IO)