top 命令

示例

[root@os-gitlab-runner ~]# top
top - 16:59:38 up 1022 days,  7:02,  2 users,  load average: 4.13, 3.21, 3.11
Tasks: 149 total,   1 running, 148 sleeping,   0 stopped,   0 zombie
%Cpu(s): 31.1 us,  4.5 sy,  0.0 ni, 49.7 id, 14.6 wa,  0.0 hi,  0.1 si,  0.0 st
KiB Mem :  8010424 total,   152468 free,  2697544 used,  5160412 buff/cache
KiB Swap:  8388604 total,  7276320 free,  1112284 used.  4944828 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
16078 root      20   0   67284  28984   3624 S 121.3  0.4 692391:54 gitlab-runner
 4314 root      20   0 6621136 2.230g   3036 S  18.0 29.2  12813:26 dockerd
 2737 root      10 -10  145744  17032   4292 S   3.7  0.2 102:26.52 AliYunDun
   40 root      20   0       0      0      0 S   2.0  0.0 431:45.24 kswapd0
    9 root      20   0       0      0      0 S   0.3  0.0 805:07.12 rcu_sched

Tasks相关参数

total 进程总数
running 正在运行的进程数
sleeping 睡眠的进程数
stopped 停止的进程数
zombie 僵尸进程数

CPU相关参数

31.1% us 用户空间占用CPU百分比
4.5% sy 内核空间占用CPU百分比
0.0% ni 用户进程空间内改变过优先级的进程占用CPU百分比
49.7% id 空闲CPU百分比
14.6% wa 等待输入输出的CPU时间百分比
0.0%hi：硬件CPU中断占用百分比
0.0%si：软中断占用百分比
0.0%st：虚拟机占用百分比

概括

us, user : time running un-niced user processes
sy, system : time running kernel processes
ni, nice : time running niced user processes
id, idle : time spent in the kernel idle handler
wa, IO-wait : time waiting for I/O completion
hi : time spent servicing hardware interrupts
si : time spent servicing software interrupts
st : time stolen from this vm by the hypervisor