Linux View thread/process/Call stack information-pstack/pstree__linux

￥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 workers,-p to display process identification code, ad_preprocess a total of 6 child threads, plus the main thread a total of 7 threads

2. Ps-lf

￥PS-LF 4551
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

Process started with 7 threads

3. Pstack

Pstack display stack traces for each procedure

￥pstack 4551
Thread 7 (thread 1084229984 (LWP 4552)):
#0 0 x000000302afc63dc in epoll_wait ()/lib64/tls/libc.so.6
0 x00000000006f0730 in Ub::epollex::p oll ()
0 x00000000006f172a in Ub::netreactor::callback ()
#3 0 x00000000006fbbbb in Ub::ubtask::callback ()
#4 0 x000000302b80610a in Start_thread ()/lib64/tls/libpthread.so.0
#5 0 x000000302afc6003 in clone ()/lib64/tls/libc.so.6
#6 0 x0000000000000000 in.. （）
Thread 6 (thread 1094719840 (LWP 4553)):
#0 0 x000000302afc63dc in epoll_wait ()/lib64/tls/libc.so.6
0 x00000000006f0730 in Ub::epollex::p oll ()
0 x00000000006f172a in Ub::netreactor::callback ()
#3 0 x00000000006fbbbb in Ub::ubtask::callback ()
#4 0 x000000302b80610a in Start_thread ()/lib64/tls/libpthread.so.0
#5 0 x000000302afc6003 in clone ()/lib64/tls/libc.so.6
#6 0 x0000000000000000 in.. （）
Thread 5 (thread 1105209696 (LWP 4554)):
#0 0 X000000302b80baa5 in __nanosleep_nocancel ()
0 x000000000079e758 in Comcm::ms_sleep ()
0 x00000000006c8581 in Ub::ubclientmanager::healthycheck ()
#3 0 x00000000006c8471 in Ub::ubclientmanager::start_healthy_check ()
#4 0 x000000302b80610a in Start_thread ()/lib64/tls/libpthread.so.0
#5 0 x000000302afc6003 in clone ()/lib64/tls/libc.so.6
#6 0 x0000000000000000 in.. （）
Thread 4 (thread 1115699552 (LWP 4555)):
#0 0 X000000302b80baa5 in __nanosleep_nocancel ()
0 x0000000000482b0e in Armor::armor_check_thread ()
0 x000000302b80610a in Start_thread ()/lib64/tls/libpthread.so.0
#3 0 x000000302afc6003 in clone ()/lib64/tls/libc.so.6
#4 0 x0000000000000000 in.. （）
Thread 3 (thread 1126189408 (LWP 4556)):
#0 0 x000000302af8f1a5 in __nanosleep_nocancel ()/lib64/tls/libc.so.6
0 x000000302af8f010 in sleep ()/lib64/tls/libc.so.6
0 x000000000044c972 in Business_config_manager::run ()
#3 0 x0000000000457b83 in Thread::run_thread ()
#4 0 x000000302b80610a in Start_thread ()/lib64/tls/libpthread.so.0
#5 0 x000000302afc6003 in clone ()/lib64/tls/libc.so.6
#6 0 x0000000000000000 in.. （）
Thread 2 (thread 1136679264 (LWP 4557)):
#0 0 x000000302af8f1a5 in __nanosleep_nocancel ()/lib64/tls/libc.so.6
0 x000000302af8f010 in sleep ()/lib64/tls/libc.so.6
0 x00000000004524bb in Process_thread::sleep_period ()
#3 0 x0000000000452641 in Process_thread::run ()
#4 0 x0000000000457b83 in Thread::run_thread ()
#5 0 x000000302b80610a in Start_thread ()/lib64/tls/libpthread.so.0
#6 0 x000000302afc6003 in clone ()/lib64/tls/libc.so.6
#7 0 x0000000000000000 in.. （）
Thread 1 (thread 182894129792 (LWP 4551)):
#0 0 x000000302af8f1a5 in __nanosleep_nocancel ()/lib64/tls/libc.so.6
0 x000000302af8f010 in sleep ()/lib64/tls/libc.so.6
0 x0000000000420d79 in Ad_preprocess::run ()
#3 0 x0000000000450ad0 in main () Balzac