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#! /usr/bin/stap
probe begin
{
printf ("%%DataSet:cpu 100 00ff00 bar\n");
printf ("%%DataSet:kbd 75 ff0000 discreet\n");
printf ("%%DataSet:pty 50 0000ff discreet\n");
printf ("cpu %%Title:CPU utilization\n");
printf ("cpu %%XAxisTitle:Time\n");
printf ("cpu %%YAxisTitle:Percent\n");
}
# CPU utilization
probe begin { qnames["cpu"] ++; qsq_start ("cpu") }
probe scheduler.cpu_on { if (!idle) {qs_wait ("cpu") qs_run ("cpu") }}
probe scheduler.cpu_off { if (!idle) qs_done ("cpu") }
global qnames
function qsq_util_reset(q) {
u=qsq_utilization (q, 100)
qsq_start (q)
return u
}
probe timer.ms(100) { # collect utilization percentages frequently
foreach (q in qnames)
printf("cpu %d %d\n", gettimeofday_ms(), qsq_util_reset(q))
}
probe kernel.function("kbd_event") {
if ($event_type == 1 && $value)
printf("kbd %d %d\n", gettimeofday_ms(), $event_code)
}
probe kernel.function("pty_write") {
if (count > 0)
printf("pty %d %.5s\n", gettimeofday_ms(), buf)
}
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