LTTng » LTTng-tools

In the enable-channel, disable-channel, enable-event and disable-event commands, it is possible to specify multiple domain options, and only one of them is actually used. The lucky domain to be elected seems to be the oldest one having been implemented in the great history of LTTng, i.e. the following precedence order applies: -k, -u, -j, -l, -p.

Examples:

$ lttng enable-channel -u -k allo 
Kernel channel allo enabled for session a

$ lttng disable-channel -u -k allo 
Kernel channel allo disabled for session a

$ lttng enable-channel -k -u  allo 
Kernel channel allo enabled for session a

$ lttng enable-event -u -j -p -k -l -c allo lol
Kernel event lol created in channel allo

$ lttng disable-event -p -l -u -j -c allo lol
UST event lol disabled in channel allo for session a

Smells like a switch-case.