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thread-business.stp - monitor syscall history
Prints a periodic tabular report about the counts of syscall activity
of all threads on the system, along with a textual
recent-syscall-history for each
$ stap thread-business.stp -T 5
execname tid count recent syscalls
stapio 20196 50 ppoll read ppoll read ppoll read ppoll read ppoll
sleep 20194 30 nanosleep close mmap2 fstat open brk brk brk munma
systemd-udevd 491 23 epoll_wait munmap close read read mmap2 fstat open
irqbalance 625 15 nanosleep munmap close read read mmap2 fstat open
systemd-udevd 20193 14 exit_group close close munmap munmap munmap munmap
stapio 20192 8 pselect6 fcntl read fcntl kill fcntl read fcntl
stapio 20194 6 execve execve execve rt_sigprocmask rt_sigaction r
The output when the system is not doing anything interesting.
Rerunning the script while SystemTap was being built.
$ stap thread-business.stp -T 5
execname tid count recent syscalls
sh 20967 13559 exit_group rt_sigprocmask rt_sigprocmask read lsee
sh 20826 5088 exit_group rt_sigprocmask rt_sigprocmask read lsee
git-diff-files 21404 2967 exit_group write fstat mmap2 fstat lstat lstat lst
git-diff-files 21348 2967 exit_group write fstat mmap2 fstat lstat lstat lst
sshd 9634 2394 select clock_gettime write clock_gettime rt_sigpro
make 21312 1110 exit_group munmap close write chdir stat rt_sigpro
make 21368 1110 exit_group munmap close write chdir stat rt_sigpro
make 21411 1011 exit_group munmap close write chdir rt_sigprocmask
make 21410 983 exit_group munmap close write chdir rt_sigprocmask
sh 21370 978 exit_group read rt_sigprocmask rt_sigprocmask read
sh 21314 978 exit_group read rt_sigprocmask rt_sigprocmask read
git-describe 21344 759 exit_group write fstat close getdents getdents ope
git-describe 21400 759 exit_group write fstat close getdents getdents ope
sh 20699 539 exit_group rt_sigprocmask rt_sigprocmask rt_sigact
find 20825 461 exit_group close munmap close write close fchdir c
sh 21499 403 exit_group rt_sigreturn wait4 rt_sigprocmask close
find 20965 381 exit_group close munmap close write close fchdir c
install 21505 359 exit_group close close close lseek lsetxattr close
sh 21515 340 exit_group rt_sigreturn wait4 rt_sigprocmask close
make 21367 334 exit_group munmap close write chdir rt_sigprocmask
execname tid count recent syscalls