[PATCH -tip v6 00/22] kprobes: introduce NOKPROBE_SYMBOL(), cleanup and fixes crash bugs

[Ingo Molnar]

* Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:

> > I can reproduce one weirdness, with just 13 probes added, 'perf probe 
> > -l' [which should really be 'perf probe list'!] executes very slowly:
> > 
> >  # perf stat --null --repeat 3 perf probe -l
> > 
> >  Performance counter stats for 'perf probe -l' (3 runs):
> > 
> >        0.763640098 seconds time elapsed                                          ( +-  1.61% )
> > 
> > 0.7 seconds is ridiculously long.
> 
> This comes from the perf-probe's internal issue. It tries to get 
> actual lines and files by using debuginfo. I guess most of the time 
> consumed when processing huge kernel debuginfo.

No, I don't have any debuginfo, I never use it.

Thanks,

	Ingo