1. 列出pid对应的每个线程占用cpu的情况
   pidstat -t -p ${pid}
2. 输出格式：
   TGID TID %usr %system %guest %CPU CPU Command

1. TGID --The identification number of the thread group leader.
2. TID --The identification number of the thread being monitored.
3. %usr --Percentage of CPU used by the task while executing at the user level (application), with or without nice priority. Note that this field does NOT include time spent running a virtual processor.
4. %system --Percentage of CPU used by the task while executing at the system level (kernel).
5. %guest --Percentage of CPU spent by the task in virtual machine (running a virtual processor).
6. %CPU --Total percentage of CPU time used by the task.
7. CPU --Processor number to which the task is attached.
8. Command --The command name of the task.

3. -u代表cpu(可以不加)，-r代表内存，-d代表io