/proc/pid/stat

External

• http://www.linuxhowtos.org/manpages/5/proc.htm

Internal

• Linux proc

Overview

/proc/<pid>/stat contains status information about a process. This information is used by ps.

Example

972 (docker-containe) S 901 972 972 0 -1 1077944576 2657 0 2 0 561 205 0 0 20 0 11 0 1820 441688064 2327 18446744073709551615 4194304 11049596 140727040242048 140727040241432 4602915 0 2079995941 0 2143420159 18446744073709551615 0 0 17 1 0 0 0 0 0 13147640 13322176 25554944 140727040249523 140727040249749 140727040249749 140727040249821 0

Content

pid (exec-file-name) state ppid pgrp session

Field 1 - pid

The process ID as integer.

Field 2 - Executable File Name

The filename of the executable, in parentheses. This is visible whether or not the executable is swapped out.

Field 3 - state

The process state, as character:

• R - running
• S - sleeping in an interruptible wait
• D - waiting in uninterruptible disk sleep
• Z - zombie
• T - stopped on a signal or (before 2.6.33) trace stopped
• t - tracing stop (2.6.33 onward)
• W - paging (before 2.6.0)
• X - dead (from 2.6.0 onward)
• x - dead (2.6.33 to 3.13 only)
• K - wakekill (2.6.33-3.13)
• W - waking (2.6.33-3.13)
• P - parked (3.9-3.13)

Field 4 - ppid

The pid of the parent process, as integer.

Field 5 - pgrp

The process group ID, as integer.

Field 6 - session

The session ID of the process, as integer.

Field 14

utime - CPU time spent in user code, measured in clock ticks

Field 15

stime - CPU time spent in kernel code, measured in clock ticks

Field 16

cutime - Waited-for children's CPU time spent in user code (in clock ticks)

Field 17

cstime - Waited-for children's CPU time spent in kernel code (in clock ticks)

Field 22

starttime - Time when the process started, measured in clock ticks