Current File : //proc/self/root/usr/share/systemtap/examples/general/stopwatches.stp
#!/usr/bin/stap
# Copyright (C) 2012-2018 Red Hat, Inc.
# by William Cohen <wcohen@redhat.com>
#
# exercise the stopwatch tapset
probe begin
{
start_stopwatch("wall");
/* The next two lines assumes that target is running and in user-space. */
start_stopwatch("user");
stop_stopwatch("system")
}
probe syscall_any
{
if (pid() != target()) next
stop_stopwatch("user")
start_stopwatch("system")
}
probe syscall_any.return
{
if (pid() != target()) next
start_stopwatch("user")
stop_stopwatch("system")
}
probe end
{
stop_stopwatch("wall")
stop_stopwatch("user")
stop_stopwatch("system")
w = read_stopwatch_us("wall")
u = read_stopwatch_us("user")
s = read_stopwatch_us("system")
printf ("wall clock %12dus\n", w);
printf ("wall clock in user-space %12dus\n", u);
printf ("wall clock in kernel-space %12dus\n", s);
delete_stopwatch("wall")
delete_stopwatch("user")
delete_stopwatch("system")
}
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