Messages in this thread | | | From | Arnaldo Carvalho de Melo <> | Date | Mon, 2 Dec 2019 16:04:52 -0300 | Subject | Re: perf probe -d failing to delete probes |
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Em Mon, Dec 02, 2019 at 03:59:58PM -0300, Arnaldo Carvalho de Melo escreveu: > 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
[root@quaco ~]# cat /sys/kernel/debug/tracing/dynamic_events p:probe_perf/map__map_ip /home/acme/bin/perf:0x000000000005f257 p:probe_perf/map__map_ip /home/acme/bin/perf:0x000000000005f2a3 p:probe_perf/map__map_ip /home/acme/bin/perf:0x00000000000fda24 p:probe_perf/map__map_ip /home/acme/bin/perf:0x00000000000fdacf p:probe_perf/map__map_ip /home/acme/bin/perf:0x00000000001028d0 p:probe_perf/map__map_ip /home/acme/bin/perf:0x000000000016dd90 [root@quaco ~]#
[root@quaco ~]# cat /sys/kernel/debug/tracing/kprobe_events [root@quaco ~]#
[root@quaco ~]# echo > /sys/kernel/debug/tracing/kprobe_events [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 ~]#
Finally it works:
[root@quaco ~]# echo > /sys/kernel/debug/tracing/dynamic_events [root@quaco ~]# cat /sys/kernel/debug/tracing/dynamic_events [root@quaco ~]# [root@quaco ~]# perf probe -l [root@quaco ~]#
A workaround, now to find out why 'perf probe -d '*:*' and the other reported variants are failing...
- Arnaldo
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