On Thu, Aug 21, 2014 at 04:03:01PM -0400, Alexandre Montplaisir wrote: > > On 08/21/2014 12:58 PM, Jiri Olsa wrote: > >hum, I've got nothing from babeltrace: > > > >[jolsa@krava ~]$ su > >Password: > >[root@krava jolsa]# lttng create perf > >Spawning a session daemon > >Session perf created. > >Traces will be written in /root/lttng-traces/perf-20140821-184956 > >[root@krava jolsa]# lttng add-context -k -t prio -t perf:cpu:cycles > > Oh I see the problem, you don't have any events enabled! In LTTng terms, a > "context" is a piece of information that gets attached to every event. But > if you don't have any event at all, you're not gonna see much context > information. ;) > > Try adding a > # lttng enable-event -a -k > before starting the session. This should give you some output in the > viewers.
ugh ;-) 'perf:cpu:cycles' already sounded like event to me.. will try thanks, jirka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
