[lttng-dev] lttng-ust traces are not generated
Mathieu Desnoyers
mathieu.desnoyers at efficios.com
Tue May 9 17:35:13 UTC 2017
----- On May 9, 2017, at 5:45 AM, Swati J <Swati.J at nectechnologies.in> wrote:
> Dear All,
> I am using lttng tool to generate userspace traces but the userspace traces are
> not getting generated .
> I have used the following commands:
> [root at pcmk1 ~]# lttng create
> Session auto-20170506-152941 created.
> Traces will be written in /root/lttng-traces/auto-20170506-152941
> [root at pcmk1 ~]# lttng enable-event --userspace --all All UST events are enabled
> in channel channel0
> [root at pcmk1 ~]# lttng start Tracing started for session auto-20170506-152941
> [root at pcmk1 ~]# systemctl start pcsd.service
> [root at pcmk1 ~]# lttng stop
> Waiting for data availability
> Tracing stopped for session auto-20170506-152941
> [root at pcmk1 ~]# lttng destroy
> Session auto-20170506-152941 destroyed
> I am not getting any error but also the file is not getting created
> I also tried to create userspace traces by logging-in via user rather than root
> but there is no difference .
> If anyone has any alternative approach or any suggestion please let me know .
Is the pcsd daemon instrumented (lttng-ust tracepoints added to its source code) ?
You can use "lttng list -u" while the daemon runs to see if the tracepoints are visible.
Thanks,
Mathieu
> Regards,
> Swati J
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> lttng-dev at lists.lttng.org
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--
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com
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