#! /usr/bin/env stap # Copyright (C) 2006 IBM Corp. # Copyright (C) 2018-2019 Red Hat, Inc. # # This file is part of systemtap, and is free software. You can # redistribute it and/or modify it under the terms of the GNU General # Public License (GPL); either version 2, or (at your option) any # later version. # # Print the system call count by process name in descending order. # global syscalls probe begin { print ("Collecting data... Type Ctrl-C to exit and display results\n") } probe syscall_any { syscalls[execname()] <<< 1 } probe end { printf ("%-10s %-s\n", "#SysCalls", "Process Name") foreach (proc in syscalls-) printf("%-10d %-s\n", @sum(syscalls[proc]), proc) }
Example 5.18. topsys.stp Sample Output
Collecting data... Type Ctrl-C to exit and display results #SysCalls Process Name 1577 multiload-apple 692 synergyc 408 pcscd 376 mixer_applet2 299 gnome-terminal 293 Xorg 206 scim-panel-gtk 95 gnome-power-man 90 artsd 85 dhcdbd 84 scim-bridge 78 gnome-screensav 66 scim-launcher [...]
#! /usr/bin/env stap # Copyright (C) 2006 IBM Corp. # # This file is part of systemtap, and is free software. You can # redistribute it and/or modify it under the terms of the GNU General # Public License (GPL); either version 2, or (at your option) any # later version. # # Print the system call count by process ID in descending order. # global syscalls probe begin { print ("Collecting data... Type Ctrl-C to exit and display results\n") } probe syscall_any { syscalls[pid()] <<< 1 } probe end { printf ("%-10s %-s\n", "#SysCalls", "PID") foreach (pid in syscalls-) printf("%-10d %-d\n", @sum(syscalls[pid]), pid) }
timer.s()
probe; for example, to instruct the script to expire after
5 seconds, add the following probe to the script:
probe timer.s(5) { exit() }