From: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
To: Jiri Olsa <jolsa@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Dominique Toupin <dominique.toupin@ericsson.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Tom Zanussi <tzanussi@gmail.com>,
Jeremie Galarneau <jgalar@efficios.com>,
David Ahern <dsahern@gmail.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: Re: FW: [RFC 0/5] perf tools: Add perf data CTF conversion
Date: Thu, 21 Aug 2014 16:03:01 -0400 [thread overview]
Message-ID: <53F65075.9050503@voxpopuli.im> (raw)
In-Reply-To: <20140821165841.GA32088@krava.brq.redhat.com>
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
next prev parent reply other threads:[~2014-08-21 20:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <53F38C74.4030300@voxpopuli.im>
2014-08-20 9:28 ` FW: [RFC 0/5] perf tools: Add perf data CTF conversion Jiri Olsa
2014-08-20 19:14 ` Alexandre Montplaisir
2014-08-21 16:58 ` Jiri Olsa
2014-08-21 20:03 ` Alexandre Montplaisir [this message]
2014-08-22 16:46 ` Jiri Olsa
2014-11-03 17:58 ` Sebastian Andrzej Siewior
2014-11-04 1:20 ` Alexandre Montplaisir
2014-11-05 12:50 ` Sebastian Andrzej Siewior
2014-11-05 17:21 ` Mathieu Desnoyers
2014-11-06 4:53 ` Alexandre Montplaisir
2014-11-13 19:24 ` Sebastian Andrzej Siewior
2014-11-14 15:51 ` Mathieu Desnoyers
2014-11-06 3:25 ` FW: " Alexandre Montplaisir
2014-11-10 1:31 ` Alexandre Montplaisir
2014-11-12 22:14 ` Support for Perf CTF traces now in master (was Re: FW: [RFC 0/5] perf tools: Add perf data CTF conversion) Alexandre Montplaisir
2014-11-26 17:37 ` Sebastian Andrzej Siewior
2014-11-27 4:27 ` Alexandre Montplaisir
2014-11-29 9:35 ` [tracecompass-dev] " Jerome CORRENOZ
2014-11-28 11:26 ` Jiri Olsa
2014-12-01 17:28 ` Jérémie Galarneau
2014-12-01 20:44 ` Jiri Olsa
2014-11-27 15:43 ` Jiri Olsa
2014-11-27 16:20 ` Sebastian Andrzej Siewior
2014-11-27 18:31 ` Alexandre Montplaisir
2014-11-28 9:32 ` Jiri Olsa
2014-11-13 19:24 ` FW: [RFC 0/5] perf tools: Add perf data CTF conversion Sebastian Andrzej Siewior
2014-11-14 11:50 ` Jiri Olsa
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