How do i display process threads using ps on linux for a specific task group id?
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-m Show threads after processes. -l Long format. The -y option is often useful with this. nwchan WCHAN address of the kernel function where the process is sleeping (use wchan if you want the kernel function name). Running tasks will display a dash ('-') in this column. tgid TGID a number representing the thread group to which a task belongs (alias pid). It is the process ID of the thread group leader.
Running ps generally does not show process thread information. Using certain ps options allows you do see thread information.
$ ps -m -l 7311 F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 4 - 1000 7311 1 0 - - - 512447 - tty2 0:21 /usr/lib/firefox/firefox -new-window 4 S 1000 - - 0 80 0 - - poll_s - 0:11 - 1 S 1000 - - 0 80 0 - - poll_s - 0:00 - 1 S 1000 - - 0 80 0 - - poll_s - 0:00 - 1 S 1000 - - 0 80 0 - - ep_pol - 0:00 - 1 S 1000 - - 0 80 0 - - futex_ - 0:00 - 1 S 1000 - - 0 80 0 - - futex_ - 0:00 - 1 S 1000 - - 0 80 0 - - futex_ - 0:00 - 1 S 1000 - - 0 80 0 - - futex_ - 0:00 - 1 S 1000 - - 0 80 0 - - poll_s - 0:00 - 1 S 1000 - - 0 80 0 - - poll_s - 0:00 - 1 S 1000 - - 0 80 0 - - futex_ - 0:00 -
Another way is
$ ps -eTl | grep 7311 | less F S UID PID SPID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 4 S 1000 2974 2974 7311 0 80 0 - 385185 poll_s tty2 00:00:00 Web Content 1 S 1000 2974 2977 7311 0 80 0 - 385185 ep_pol tty2 00:00:00 Chrome_~dThread 1 S 1000 2974 2978 7311 0 80 0 - 385185 poll_s tty2 00:00:00 gmain 1 S 1000 2974 2979 7311 0 80 0 - 385185 poll_s tty2 00:00:00 gdbus 1 S 1000 2974 2989 7311 0 80 0 - 385185 futex_ tty2 00:00:00 JS Watchdog 1 S 1000 2974 2990 7311 0 80 0 - 385185 futex_ tty2 00:00:00 JS Helper 1 S 1000 2974 2991 7311 0 80 0 - 385185 futex_ tty2 00:00:00 JS Helper 1 S 1000 2974 2992 7311 0 80 0 - 385185 poll_s tty2 00:00:00 Socket Thread 1 S 1000 2974 2993 7311 0 80 0 - 385185 futex_ tty2 00:00:00 Timer 1 S 1000 2974 2994 7311 0 80 0 - 385185 futex_ tty2 00:00:00 DOM File 1 S 1000 2974 2995 7311 0 80 0 - 385185 futex_ tty2 00:00:00 Worker Launcher 1 S 1000 2974 2996 7311 0 80 0 - 385185 futex_ tty2 00:00:00 PaintThread 1 S 1000 2974 2997 7311 0 80 0 - 385185 futex_ tty2 00:00:00 ImgDecoder #1 ... ... ...
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