终端运行 mpstat 查看 CPU 使用率的变化情况：
#显示所有CPU的指标，并在间隔5秒输出一组数据
[root@test001 ~]# mpstat -P ALL 5
Linux 3.10.0-1127.8.2.el7.x86_64 (test001) 03/15/2021 _x86_64_ (2 CPU)
02:55:34 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
02:55:40 PM all 1.21 0.00 95.65 0.10 0.00 0.20 1.11 0.00 0.00 1.72
02:55:40 PM 0 1.20 0.00 97.79 0.00 0.00 0.20 0.20 0.00 0.00 0.60
02:55:40 PM 1 1.02 0.00 94.06 0.00 0.00 0.20 1.84 0.00 0.00 2.87
用 pidstat 来查询具体的进程或者操作命令：
[root@test001 ~]# pidstat -u 6 1
Linux 3.10.0-1127.8.2.el7.x86_64 (test001) 03/15/2021 _x86_64_ (2 CPU)
02:54:18 PM UID PID %usr %system %guest %CPU CPU Command
02:54:24 PM 0 7 0.00 1.49 0.00 1.49 0 migration/0
02:54:24 PM 0 13 0.00 0.99 0.00 0.99 1 migration/1
02:54:24 PM 0 50 0.00 4.30 0.00 4.30 0 kworker/u30:1
02:54:24 PM 0 12310 0.17 0.00 0.00 0.17 0 tuned
02:54:24 PM 0 27021 0.00 0.33 0.00 0.33 1 kworker/1:1
02:54:24 PM 0 27181 0.00 12.91 0.00 12.91 1 kworker/u30:3
02:54:24 PM 0 27228 0.00 0.33 0.00 0.33 1 kworker/1:0
02:54:24 PM 0 27329 0.17 17.55 0.00 17.72 0 stress
02:54:24 PM 0 27330 0.33 18.38 0.00 18.71 0 stress
02:54:24 PM 0 27331 0.33 18.05 0.00 18.38 1 stress
02:54:24 PM 0 27332 0.33 21.36 0.00 21.69 1 stress
02:54:24 PM 0 27333 0.33 15.89 0.00 16.23 0 stress