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.
Cheers,
Alexandre
kernel context prio added to all channels
kernel context perf:cpu:cycles added to all channels
[root@krava jolsa]# lttng start
Tracing started for session perf
[root@krava jolsa]# lttng stop
Waiting for data availability.
Tracing stopped for session perf
[root@krava jolsa]# lttng destroy
Session perf destroyed
[root@krava jolsa]# babeltrace ~/lttng-traces/perf-20140821-184956/
[root@krava jolsa]# babeltrace ~/lttng-traces/perf-20140821-184956/kernel/
[root@krava jolsa]#
and empty view in eclipse
thanks,
jirka
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