Hi -
> I'm trying to trace some syscalls in Debian Jessie [...]
> My motivation is to trace manipulations / forced adjustments of the
> system timebase: ntpd, ntpdate, date -s or some such.
> [...]
> What strikes me: even if I enable just six individual "events", in
> the trace buffer (output) I get a waterfall of unrelated events
> being logged - looks like routine process scheduler clockwork. [...]
BTW, if you are able to use systemtap on your box, you can tune a
script to collect & report -only- the information you want:
# stap -e '
probe syscall.{adjtimex,clock_adjtime,clock_settime}
{ println(tid(), " ", ppfunc()," ",$$parms) }
probe syscall.{adjtimex,clock_adjtime,clock_settime}.return
{ println(tid(), " ", ppfunc()," ",$$return) }
'
- FChE
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