Several ways to view the number of threads under "Go" Linux

1, cat/proc/${pid}/status

2,pstree-p ${pid}

3,top-p ${pid} and press H or direct input top-bh-d 3-p ${pid}

Top-h
The handbook says:-h:threads Toggle
Add this option to start a top,top line to display a thread. Otherwise, it displays a process one line.

4, PS XH
The manual says: H Show Threads as if they were processes
This allows you to view all the threads that exist.

5. PS-MP <PID>
The manual says: M Show Threads after processes
This allows you to see the number of threads from a process.

Several ways to view the number of threads under "Go" Linux