Em Tue, Feb 07, 2017 at 08:53:56AM +0100, Ingo Molnar escreveu: > > * Arnaldo Carvalho de Melo <[email protected]> wrote: > > > Em Fri, Feb 03, 2017 at 03:56:42PM +0530, Ravi Bangoria escreveu: > > > After patch: > > > $ perf record -a -e sdt_glib:idle__add > > > event syntax error: 'sdt_glib:idle__add' > > > \___ unknown tracepoint > > > > > > Error: File /sys/kernel/debug/tracing/events/sdt_glib/idle__add not > > > found. > > > Hint: SDT event cannot be directly recorded on. Please use 'perf > > > probe sdt_glib:idle__add' before recording it. > > > ... > > > > > > $ perf probe sdt_glib:idle__add > > > Added new event: > > > sdt_glib:idle__add (on %idle__add in > > > /usr/lib64/libglib-2.0.so.0.5000.2) > > > > > > You can now use it in all perf tools, such as: > > > > > > perf record -e sdt_glib:idle__add -aR sleep 1 > > > > > > $ perf record -a -e sdt_glib:idle__add > > > [ perf record: Woken up 1 times to write data ] > > > [ perf record: Captured and wrote 0.175 MB perf.data ] > > > > Looks much better! Thanks! > > > > Unsure if we should state somewhere that this needs to be done only once > > per boot. > > > > Ingo, are you ok now? Ack? > > Yeah, looks perfect to me! > > Acked-by: Ingo Molnar <[email protected]>
Thanks, added that "first" and split the Hint line in two. Automagically setting it up, doing the perf probe and rendering the above comment irrelevant remains as a task to be performed. - Arnaldo
