Re: perf probe -d failing to delete probes

[Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>]

Em Fri, Nov 29, 2019 at 12:13:24PM -0300, Arnaldo Carvalho de Melo escreveu:
> 
> Hi Masami,
> 
>    Can you please take a look at this?
> 
> [root@quaco perf]# perf probe -l
>   probe_perf:map__map_ip (on ui__warn_map_erange+222@perf/tools/perf/builtin-top.c in /home/acme/bin/perf)
>   probe_perf:map__map_ip (on ui__warn_map_erange+222@perf/tools/perf/builtin-top.c in /home/acme/bin/perf)
>   probe_perf:map__map_ip (on perf_evlist__set_paused+222@util/evlist.c in /home/acme/bin/perf)
>   probe_perf:map__map_ip (on perf_evlist__resume+222@util/evlist.c in /home/acme/bin/perf)
>   probe_perf:map__map_ip (on perf_evsel__group_desc+222@util/evsel.c in /home/acme/bin/perf)
>   probe_perf:map__map_ip (on svg_partial_wakeline+222@util/svghelper.c in /home/acme/bin/perf)
> [root@quaco perf]# perf probe -d probe_perf:map_*
> "probe_perf:map_*" does not hit any event.
>   Error: Failed to delete events.
> [root@quaco perf]# perf probe -d probe_perf:*
> "probe_perf:*" does not hit any event.
>   Error: Failed to delete events.
> [root@quaco perf]# perf probe -d probe*:*
> "probe*:*" does not hit any event.
>   Error: Failed to delete events.
> [root@quaco perf]# perf probe -d '*:*'
> "*:*" does not hit any event.
>   Error: Failed to delete events.
> [root@quaco perf]#

[root@quaco ~]# perf probe -l
  probe_perf:map__map_ip (on process_sample_event+6663@tools/perf/builtin-script.c in /home/acme/bin/perf)
  probe_perf:map__map_ip (on process_sample_event+6739@tools/perf/builtin-script.c in /home/acme/bin/perf)
  probe_perf:map__map_ip (on unwind_entry+436@util/machine.c in /home/acme/bin/perf)
  probe_perf:map__map_ip (on machine__process_extra_kernel_map+31@util/machine.c in /home/acme/bin/perf)
  probe_perf:map__map_ip (on __maps__insert+192@util/map.c in /home/acme/bin/perf)
  probe_perf:map__map_ip (on dso__process_kernel_symbol+336@util/symbol-elf.c in /home/acme/bin/perf)
[root@quaco ~]# ls -la /sys/kernel/debug/tracing/events/probe_perf/
total 0
drwxr-xr-x.   3 root root 0 Nov 29 12:09 .
drwxr-xr-x. 113 root root 0 Dec  2 15:56 ..
-rw-r--r--.   1 root root 0 Nov 29 12:09 enable
-rw-r--r--.   1 root root 0 Nov 29 12:09 filter
drwxr-xr-x.   2 root root 0 Nov 29 12:09 map__map_ip
[root@quaco ~]#

Trying to figure out how to remove it via debugfs/tracefs