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Documentation: /proc/$pid/stat files

Documentation for the /proc/$pid/stat file.

Signed-off-by: Kees Cook <kees@outflux.net>
Cc: Rob Landley <rob@landley.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
master
Kees Cook 15 years ago
committed by Linus Torvalds
parent
commit
18d96779d9
  1. 65
      Documentation/filesystems/proc.txt

65
Documentation/filesystems/proc.txt

@ -171,7 +171,9 @@ read the file /proc/PID/status:
This shows you nearly the same information you would get if you viewed it with
the ps command. In fact, ps uses the proc file system to obtain its
information. The statm file contains more detailed information about the
process memory usage. Its seven fields are explained in Table 1-2.
process memory usage. Its seven fields are explained in Table 1-2. The stat
file contains details information about the process itself. Its fields are
explained in Table 1-3.
Table 1-2: Contents of the statm files (as of 2.6.8-rc3)
@ -188,16 +190,65 @@ Table 1-2: Contents of the statm files (as of 2.6.8-rc3)
dt number of dirty pages (always 0 on 2.6)
..............................................................................
Table 1-3: Contents of the stat files (as of 2.6.22-rc3)
..............................................................................
Field Content
pid process id
tcomm filename of the executable
state state (R is running, S is sleeping, D is sleeping in an
uninterruptible wait, Z is zombie, T is traced or stopped)
ppid process id of the parent process
pgrp pgrp of the process
sid session id
tty_nr tty the process uses
tty_pgrp pgrp of the tty
flags task flags
min_flt number of minor faults
cmin_flt number of minor faults with child's
maj_flt number of major faults
cmaj_flt number of major faults with child's
utime user mode jiffies
stime kernel mode jiffies
cutime user mode jiffies with child's
cstime kernel mode jiffies with child's
priority priority level
nice nice level
num_threads number of threads
start_time time the process started after system boot
vsize virtual memory size
rss resident set memory size
rsslim current limit in bytes on the rss
start_code address above which program text can run
end_code address below which program text can run
start_stack address of the start of the stack
esp current value of ESP
eip current value of EIP
pending bitmap of pending signals (obsolete)
blocked bitmap of blocked signals (obsolete)
sigign bitmap of ignored signals (obsolete)
sigcatch bitmap of catched signals (obsolete)
wchan address where process went to sleep
0 (place holder)
0 (place holder)
exit_signal signal to send to parent thread on exit
task_cpu which CPU the task is scheduled on
rt_priority realtime priority
policy scheduling policy (man sched_setscheduler)
blkio_ticks time spent waiting for block IO
..............................................................................
1.2 Kernel data
---------------
Similar to the process entries, the kernel data files give information about
the running kernel. The files used to obtain this information are contained in
/proc and are listed in Table 1-3. Not all of these will be present in your
/proc and are listed in Table 1-4. Not all of these will be present in your
system. It depends on the kernel configuration and the loaded modules, which
files are there, and which are missing.
Table 1-3: Kernel info in /proc
Table 1-4: Kernel info in /proc
..............................................................................
File Content
apm Advanced power management info
@ -473,10 +524,10 @@ IDE devices:
More detailed information can be found in the controller specific
subdirectories. These are named ide0, ide1 and so on. Each of these
directories contains the files shown in table 1-4.
directories contains the files shown in table 1-5.
Table 1-4: IDE controller info in /proc/ide/ide?
Table 1-5: IDE controller info in /proc/ide/ide?
..............................................................................
File Content
channel IDE channel (0 or 1)
@ -486,11 +537,11 @@ Table 1-4: IDE controller info in /proc/ide/ide?
..............................................................................
Each device connected to a controller has a separate subdirectory in the
controllers directory. The files listed in table 1-5 are contained in these
controllers directory. The files listed in table 1-6 are contained in these
directories.
Table 1-5: IDE device information
Table 1-6: IDE device information
..............................................................................
File Content
cache The cache

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