一、統計sleep狀态的程序.
c233 plugins # ps -elf|head -1
F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD
4 Sroot 28149 4204 0 80 0 - 16283 poll_s Jul05 ? 00:00:00 sshd: root
c233 plugins #
ps -efl|awk '$2~/S/{print $0}'|wc -l //-l long format.
73
解釋===>
(1)F列.
PROCESS FLAGS
The sum of these values is displayed in the "F" column, which is provided by the flags output specifier.
1 forked but didn't exec
4 used super-user privileges
(1)S列.
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.
(3)C列.C pcpu cpu utilization
(4)
command COMMAND see args. (alias args, cmd).
sz SZ size in physical pages of the core image of the process. This
includes text, data, and stack space. Device mappings are currently
excluded; this is subject to change. See vsz and rss.
(5)WCHAN列.
wchan WCHAN name of the kernel function in which the process is sleeping,
a "-" if the process is running, or a "*" if the process is
multi-threaded and ps is not displaying threads.
二、統計目前運作的線程總數."-L"
c233 plugins #ps -eLf|grep -v $$|wc -l //-L Show threads, possibly with LWP and NLWP columns
646
c233 plugins # ps -eLf|grep -v $$|tail
UID PID PPID LWP C NLWPSTIME TTY TIME CMD
root 23678 1 688 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 689 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 690 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 691 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 692 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 693 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 694 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 695 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 23678 1 696 0 36 Jul01 ? 00:00:06 /usr/sbin/nscd
root 28149 4204 28149 0 1 Jul05 ? 00:00:00 sshd: root
NLWP(number of threads)
LWP(thread ID)
c233 plugins # ps -ef|grep nscd
root 23678 1 0 Jun30 ? 00:15:32 /usr/sbin/nscd
三、Linux下檢視某個程序的線程數量.
1.根據程序号進行查詢：
# pstree -p 程序号 //-p pid
# top -Hp 程序号 //-H : Threads toggle
2.根據程序名字進行查詢：
# pstree -p `ps -e | grep sshd | awk '{print $1}'`
# pstree -p `ps -e | grep sshd | awk '{print $1}'` | wc -l
四、統計正在sleeop的線程總數.
d231 ~ # for i in `ps aux|awk '$8~/S/{print $2}'`;do //如何讓其累加？？如何檢視正在運作的線程？？？？
> m=`pstree -p $i|wc -l`
> echo $m
> done
No such user name: PID
1184
42
1
1
13
1
1
1
1
1
1
1
1
2
2
61
1
8
1
1088
1