[3]linux 进程监控工具 top

@robot：~$ top
可以看到很多的参数，且都是缩写。其中

a: PID (Process Id):任务的进程ID

b: PPID (Parent Process Pid):父任务的进程ID

c: RUSER (Real User Name):任务的所有者真实名称

d: UID (User Id):任务所有者ID

e: USER (User Name):任务所有者名称

f: GROUP (Group Name):任务所有者群组名

g: TTY (Controlling Tty):终端

h: PR (Priority):优先级

i: NI (Nice value):Nice值

j: P (Last used CPU (SMP)):

k: %CPU (CPU usage):CPU使用率

l: TIME (CPU Time):CPU时间

m: TIME+ (CPU Time, hundredths):CPU时间，精确到秒

n: %MEM (Memory usage (RES)):内存使用率

o: VIRT (Virtual Image (kb)):虚拟内存。VIRT = SWAP + RES

p: SWAP (Swapped size (kb)):交换空间

q: RES (Resident size (kb)):常驻内存。RES = CODE + DATA

r: CODE (Code size (kb)):

s: DATA (Data+Stack size (kb)):

t: SHR (Shared Mem size (kb)):共享内存。

u: nFLT (Page Fault count):

v: nDRT (Dirty Pages count):

w: S (Process Status):进程状态

分别有以下几种：

D = uninterruptible sleep = 不可被唤醒睡眠

R = running = 正在运行中

S = sleeping = 睡眠状态

T = traced or stopped = 出错或停止状态

Z = zombie = 僵尸状态

x: Command (Command line or Program name):进程名或命令行

y: WCHAN (Sleeping in Function):

z: Flags (Task Flags):