top命令 使用

linux 环境下

1）top 
2） f
3） 上下键 按空格选择显示的列 最后按ESC退出（例如p显示每个线程运行的当前core）
4） H 显示线程
5） s 每秒的变化都输出

taskset -pc PID
线程的affinity

#taskset -p -c 0-7 2358   线程2358 亲和cpu core 0-7

FreeBSD环境

1） top -SH
2)  h 显示帮助

These single-character commands are available:


^L      - redraw screen
q       - quit
h or ?  - help; show this text
C       - toggle the displaying of weighted CPU percentage
d       - change number of displays to show
e       - list errors generated by last "kill" or "renice" command
H       - toggle the displaying of threads
i or I  - toggle the displaying of idle processes
j       - toggle the displaying of jail ID
J       - display processes for only one jail (+ selects all jails)
k       - kill processes; send a signal to a list of processes
m       - toggle the display between 'cpu' and 'io' modes
n or #  - change number of processes to display
o       - specify sort order (pri, size, res, cpu, time, threads, jid, pid)
P       - toggle the displaying of per-CPU statistics
r       - renice a process
s       - change number of seconds to delay between updates
S       - toggle the displaying of system processes
a       - toggle the displaying of process titles
t       - toggle the display of this process
u       - display processes for only one user (+ selects all users)
z       - toggle the displaying of the system idle process

3） 输入对应字母即可显示信息 比如C 显示运行的core