【整理】ps命令输出字段的含义

【整理】ps命令输出字段的含义

Linux中的ps命令，用于查看进程状态信息。

其输出内容有很多列，每一列中又有很多字母或符号表示很多种不同意思。

先贴个例子：

MTLG>ps
  PID  Uid        VSZ  Stat     Command
    1 root        132    S         /sbin/init
    2 root                  RWN   [ksoftirqd/0]
    3 root                  SW<    [events/0]
    4 root                  SW<    [khelper]
    5 root                  SW<    [kthread]
    6 root                  SW<    [kblockd/0]
    7 root                  SW     [pdflush]
    8 root                  SW     [pdflush]
    9 root                  SW<   [kswapd0]
   10 root                  SW<  [aio/0]
   11 root                  SW    [mtdblockd]
   12 root                  SW<  [bfin-spi-master]
   13 root                  SW<  [rd_silabs_wq]
   14 root                  DW<  [wr_silabs_wq]
   15 root                  SWN  [jffs2_gcd_mtd3]
   22 root        396    S        /bin/sh /root/focus.profile
   23 root         32     S       /bin/watchdogd -f -k 1 -w 5
   30 root                  SW<  [IR_State_Machin]
   50 root      11606  S      /root/focusapp
   51 root      11606  S      /root/focusapp
   52 root      11606  S      /root/focusapp
  143 root      11606 S      /root/focusapp
  144 root        384   S      sh -c ps < /dev/silabstty0 > /dev/silabstty0 2>&1
  145 root        516   R      ps

具体含义为：

字　段          含义

其中关于状态信息的英文解释：

PROCESS STATE CODES
Here are the different values that the s, stat and state output specifiers
(header “STAT” or “S”) will display to describe the state of a process.
D    Uninterruptible sleep (usually IO)
R    Running or runnable (on run queue)
S    Interruptible sleep (waiting for an event to complete)
T    Stopped, either by a job control signal or because it is being traced.
W    paging (not valid since the 2.6.xx kernel)
X    dead (should never be seen)
Z    Defunct (“zombie”) process, terminated but not reaped by its parent.

For BSD formats and when the stat keyword is used, additional characters may
be displayed:
<    high-priority (not nice to other users)
N    low-priority (nice to other users)
L    has pages locked into memory (for real-time and custom IO)
s    is a session leader
l    is multi-threaded (using CLONE_THREAD, like NPTL pthreads do)
+    is in the foreground process group

【引用】

1.ps命令输出字段的含义
http://blog.sina.com.cn/s/blog_5dc960cd0100ccoe.html

2.man ps

http://unixhelp.ed.ac.uk/CGI/man-cgi?ps

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