LTTng » LTTng-modules

With kernel tracing enabled, simply creating a session with a single event and destroying it without having started it like so:

lttng create mysession
lttng enable-event --kernel myevent
lttng destroy mysession

Wil result in many warnings in dmesg about non-consumed data, it's always 84 bytes which could match a packet header :

[  229.214608] LTTng: ring buffer relay-discard, cpu 15: non-consumed data
                 [ 84 bytes written, 0 bytes read ]