#! /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()
}