pstatck命令可現實每個程序的棧跟蹤。pstack命令必須由相應程序的屬主或root執行。可以使用pstack來確定程序掛起的位置。此命令允許使用的唯一選項是要檢查的程序的pid.
例項:pstree以樹結構顯示程序
pstree -p work | grep ad
sshd(22669)---bash(22670)---ad_preprocess(4551)-+-(4552)
|-(4553)
|-(4554)
|-(4556)
`-(4557)
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
pstack顯示每個程序的棧跟蹤:
pstack 4551
thread 7 (thread 1084229984 (lwp 4552)):
#0 0x000000302afc63dc in epoll_wait () from /lib64/tls/libc.so.6
#1 0x00000000006f0730 in ub::epollex::poll ()
#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::poll ()
#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 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 ()
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