LTTng » LTTng-tools

$ sudo -H lttng create session1
Session session1 created.
Traces will be written in /root/lttng-traces/session1-20130220-104535
$ sudo -H lttng enable-consumer /home/daniel/lttng-traces/s1
URL /home/daniel/lttng-traces/s1 set for kernel session session1.
Consumer enabled successfully
URL /home/daniel/lttng-traces/s1 set for UST session session1.
Consumer enabled successfully
$ sudo -H lttng list session1Tracing session session1: [inactive]
    Trace path: /root/lttng-traces/session1-20130220-104535

=== Domain: Kernel ===

Warning: No kernel channel
=== Domain: UST global ===

Error: UST channel not found

The lttng list command reports the initial default output folder (which in this case won't even exist) instead of the actual one set up by enable-consumer (and which has already been created).

Note also how a lack of kernel events yields a warning while the same lack in the userspace domain yields an error (however, this is probably the result of this trace being set up in root's userspace).