Multi-threaded viewing tool under Linux (Pstree, PS, Pstack)

1. Pstree

Pstree displaying processes in a tree structure
$ pstree-p Work | grep ad
SSHD (22669)---bash (22670)---ad_preprocess (4551)-+-{ad_preprocess} (4552)
|-{ad_preprocess} (4553)
|-{ad_preprocess} (4554)
|-{ad_preprocess} (4555)
|-{ad_preprocess} (4556)
'-{ad_preprocess} (4557)

Work for the working user,-p for the display process identification number, ad_preprocess a total of 6 sub-threads, plus the main thread total of 7 threads

2. Ps-lf

$ ps-lf4551
UID PID PPID LWP C nlwp stime TTY STAT time CMD
Work 4551 22670 4551 2 7 16:30 pts/2 sl+ 0:02./ad_preprocess
Work 4551 22670 4552 0 7 16:30 pts/2 sl+ 0:00./ad_preprocess
Work 4551 22670 4553 0 7 16:30 pts/2 sl+ 0:00./ad_preprocess
Work 4551 22670 4554 0 7 16:30 pts/2 sl+ 0:00./ad_preprocess
Work 4551 22670 4555 0 7 16:30 pts/2 sl+ 0:00./ad_preprocess
Work 4551 22670 4556 0 7 16:30 pts/2 sl+ 0:00./ad_preprocess
Work 4551 22670 4557 0 7 16:30 pts/2 sl+ 0:00./ad_preprocess

The process has started a total of 7 threads

3. Pstack

Pstack show stack traces for each process

$ pstack4551
Thread 7 (thread 1084229984 (LWP 4552)):
#0 0x000000302afc63dc in epoll_wait () from/lib64/tls/libc.so.6
#1 0x00000000006f0730 in Ub::epollex::p oll ()
#2 0x00000000006f172a in Ub::netreactor::callback ()
#3 0x00000000006fbbbb in Ub::ubtask::callback ()
#4 0x000000302b80610a in Start_thread () from/lib64/tls/libpthread.so.0
#5 0x000000302afc6003 in Clone () from/lib64/tls/libc.so.6
#6 0x0000000000000000 in?? ()
Thread 6 (thread 1094719840 (LWP 4553)):
#0 0x000000302afc63dc in epoll_wait () from/lib64/tls/libc.so.6
#1 0x00000000006f0730 in Ub::epollex::p oll ()
#2 0x00000000006f172a in Ub::netreactor::callback ()
#3 0x00000000006fbbbb in Ub::ubtask::callback ()
#4 0x000000302b80610a in Start_thread () from/lib64/tls/libpthread.so.0
#5 0x000000302afc6003 in Clone () from/lib64/tls/libc.so.6
#6 0x0000000000000000 in?? ()
Thread 5 (thread 1105209696 (LWP 4554)):
#0 0x000000302b80baa5 in __nanosleep_nocancel ()
#1 0x000000000079e758 in Comcm::ms_sleep ()
#2 0x00000000006c8581 in Ub::ubclientmanager::healthycheck ()
#3 0x00000000006c8471 in Ub::ubclientmanager::start_healthy_check ()
#4 0x000000302b80610a in Start_thread () from/lib64/tls/libpthread.so.0
#5 0x000000302afc6003 in Clone () from/lib64/tls/libc.so.6
#6 0x0000000000000000 in?? ()
Thread 4 (thread 1115699552 (LWP 4555)):
#0 0x000000302b80baa5 in __nanosleep_nocancel ()
#1 0x0000000000482b0e in Armor::armor_check_thread ()
#2 0x000000302b80610a in Start_thread () from/lib64/tls/libpthread.so.0
#3 0x000000302afc6003 in Clone () from/lib64/tls/libc.so.6
#4 0x0000000000000000 in?? ()
Thread 3 (thread 1126189408 (LWP 4556)):
#0 0x000000302af8f1a5 in __nanosleep_nocancel () from/lib64/tls/libc.so.6
#1 0x000000302af8f010 in Sleep () from/lib64/tls/libc.so.6
#2 0x000000000044c972 in Business_config_manager::run ()
#3 0x0000000000457b83 in Thread::run_thread ()
#4 0x000000302b80610a in Start_thread () from/lib64/tls/libpthread.so.0
#5 0x000000302afc6003 in Clone () from/lib64/tls/libc.so.6
#6 0x0000000000000000 in?? ()
thread 2 (Thread 1136679264 (LWP 4557):
#0   0X000000302AF8F1A5 in __nanosleep_ Nocancel () from/lib64/tls/libc.so.6
#1   0x000000302af8f010 in sleep () from/lib64/tls/libc.so.6
#2   0X00000000004524BB in Process_thread::sleep_period ()
#3   0x0000000000452641 in Process_thread::run ()
#4 & nbsp 0x0000000000457b83 in Thread::run_thread ()
#5   0x000000302b80610a in Start_thread () from/lib64/tls/ libpthread.so.0
#6   0x000000302afc6003 in Clone () from/lib64/tls/libc.so.6
#7   0x0000000000000000 in ?? ()
thread 1 (Thread 182894129792 (LWP 4551)):
#0   0X000000302AF8F1A5 in __ Nanosleep_nocancel () from/lib64/tls/libc.so.6
#1   0x000000302af8f010 in sleep () from/lib64/tls/libc.so.6
#2   0x0000000000420d79 in Ad_preprocess::run ()
#3   0x0000000000450ad0 in Main ()

http://blog.csdn.net/yfkiss/article/details/6729364

Linux under Multi-threaded view tool (Pstree, PS, Pstack) (GO)